Drag & Drop multiple from ListView

TheMSsForum.com: The Microsoft Software Forum

The MSS Forum ‹ Winforms
- Archive
  - Biz
  - MCSE
  - CRM
  - Drivers
  - Framework
  - ADO
  - ASP
  - Compact
  - Forms
  - Dotnet
  - C#
  - VB
  - FontpageGen
  - Excel
  - WorkSheet
  - Exchange
  - Setup
  - Fox
  - Fontpage
  - ASP
  - IIS
  - Entourage
  - Money
  - Messanger
  - PocketPC
  - Powerpoint
  - Project
  - Publisher
  - Excel
  - VB
  - Security
  - Portal
  - Services
  - SQLServerDev
  - SVCS
  - SQLServer
  - VB
  - VC
  - MFC
  - ExcelGen

- Previous
  - 1
    - How to get the selected co value? Hi Guys, I'm creating one or more dynamic datagrids in a form. I have attached a contextment to the datagrid. On selection of one menu item I want to get the first colum's value of the selected row. How to I do that? thx for ur help John Tag: Drag & Drop multiple from ListView Tag: 91160
  - 2
    - RichTextBox issues for ContextMenu and DBCS input Hi There! I noticed two problems with .NET System.Windows.Forms.RichTextBox object: 1. While firing ContextMenu.Popup event from a RichTextBox object, the ContextMenu.SourceControl is always null. 2. If I want to set a menuItem Enabled or not (e.g.: Cut, Copy, Reverse, etc.) according to whether there is selected text in a RichTextBox object (I test SelectionLength > 0 or Selected{Text||Rtf}.Length > 0 during Application.Idle event and then update the command and menuItem state), I get a problem with DBCS input: the Chinese IME doesn't work anymore, the Korean IME works letter by letter instead of composing hangul characters, and the Japanese IME works randomly. As soon as I take off the test of those Selection related properties, I can do DBCS input perfectly within RichTextBox objects. Does anybody have a clue why there are those problems and how to work around? Thanks in advance! Jian Yang Tag: Drag & Drop multiple from ListView Tag: 91159
  - 3
    - MenuItem - Am I missing something obvious? I've got a pretty standard menu at the top of my main form, and the MenuItem's have event handlers for the "Select" event to update the statusbar text, but what I can't seem to find is a way to know when the user has cancelled the menu without clicking anything so I can clear the statusbar text. I feel like I'm missing something obvious. Does anyone know how to do this? Thanks! Terry Tag: Drag & Drop multiple from ListView Tag: 91158
  - 4
    - treeviw problem Hi, I'm using Windows.Forms.TreeView control (.NET Framework 1.1). When a user select a a node from the tree, the text of the selected TreeNode object is displayed in a Bold font. The problem is that when the text is displayed in Bold font some of it dissapears. It seems as if the space allocated for the text of the TreeNode is not wide enough. I added a splitter to change the width of the TreeView control but it didn't help, the space allocated for the text remains the same and still not wide enough . Any idea of how solve it will be appreciated. Thanks, Ohad Tag: Drag & Drop multiple from ListView Tag: 91157
  - 5
    - Sub / Function Name & Error Handeling This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C5A04B.7CB0CC80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable All - How can I tell / extract the name of the sub or function that is = creating an error? I'd like to extract this so I can write an event and = include the sub name in the error text without having to go to every = error handling statement and adding the sub as a string. Thanks, Brian ------=_NextPart_000_0006_01C5A04B.7CB0CC80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2668" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>All - How can I tell / extract the name = of the sub=20 or function that is creating an error?  I'd like to extract this so = I can=20 write an event and include the sub name in the error text without having = to go=20 to every error handling statement and adding the sub as a = string.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Brian</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV></BODY></HTML> ------=_NextPart_000_0006_01C5A04B.7CB0CC80-- Tag: Drag & Drop multiple from ListView Tag: 91154
  - 6
    - DataGrid - Editing row causes additional null row to be added After inserting a new data row to a DataTable that is bound to a datagrid, I am unable to change data in a row that is after the newly added row without getting bizarre results. I have added the full code for the test below. Create a project drop in the code and run. Any help would be appreciated. Cheers, Dave Test #1 ====================== 1) Click on the row where ID = 1 2) Click "Add Row" button 3) Click on the cell ID = 2 Number = 4 4) Change the number from 4 to 5 5) Move off the row (i.e. hit the down arrow key) 6) Notice there are 2 rows with ID = 2 now 2, 5, 6 2, 4, 6 Test #2 ====================== 1) Click on the row where ID = 1 2) Click "Add Row" button 3) Click "Remove Binding" 4) Click "Add Binding" 5) Click on the cell ID = 2 Number = 4 6) Change the number from 4 to 5 7) Move off the row (i.e. hit the down arrow key) 8) Notice there are 2 rows with ID = 2 now 2, 5, 6 2, 4, 6 ========================== using System; using System.Data; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; namespace Controls { /// <summary> /// Summary description for TestDataGrid. /// </summary> public class TestDataGrid : System.Windows.Forms.Form { private int idCounter = 100; #region Unimportant Window stuff private System.Windows.Forms.DataGrid theGrid; private System.Windows.Forms.Button addButton; private System.Data.DataSet myDataSet; private System.Data.DataTable rateTable; private System.Data.DataColumn dataColumn1; private System.Data.DataColumn dataColumn2; private System.Data.DataColumn dataColumn3; private System.Windows.Forms.Button removeBinding; private System.Windows.Forms.Button addBinding; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public TestDataGrid() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.theGrid = new System.Windows.Forms.DataGrid(); this.myDataSet = new System.Data.DataSet(); this.rateTable = new System.Data.DataTable(); this.dataColumn1 = new System.Data.DataColumn(); this.dataColumn2 = new System.Data.DataColumn(); this.dataColumn3 = new System.Data.DataColumn(); this.addButton = new System.Windows.Forms.Button(); this.removeBinding = new System.Windows.Forms.Button(); this.addBinding = new System.Windows.Forms.Button(); ((System.ComponentModel.ISupportInitialize)(this.theGrid)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.myDataSet)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.rateTable)).BeginInit(); this.SuspendLayout(); // // theGrid // this.theGrid.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.theGrid.DataMember = "RateTable"; this.theGrid.DataSource = this.myDataSet; this.theGrid.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.theGrid.Location = new System.Drawing.Point(8, 40); this.theGrid.Name = "theGrid"; this.theGrid.Size = new System.Drawing.Size(368, 184); this.theGrid.TabIndex = 0; // // myDataSet // this.myDataSet.DataSetName = "NewDataSet"; this.myDataSet.Locale = new System.Globalization.CultureInfo("en-US"); this.myDataSet.Tables.AddRange(new System.Data.DataTable[] { this.rateTable}); // // rateTable // this.rateTable.Columns.AddRange(new System.Data.DataColumn[] { this.dataColumn1, this.dataColumn2, this.dataColumn3}); this.rateTable.TableName = "RateTable"; // // dataColumn1 // this.dataColumn1.ColumnName = "ID"; this.dataColumn1.DataType = typeof(int); // // dataColumn2 // this.dataColumn2.ColumnName = "Number"; this.dataColumn2.DataType = typeof(int); // // dataColumn3 // this.dataColumn3.ColumnName = "Price"; this.dataColumn3.DataType = typeof(int); // // addButton // this.addButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.addButton.Location = new System.Drawing.Point(16, 256); this.addButton.Name = "addButton"; this.addButton.TabIndex = 1; this.addButton.Text = "Add Row"; this.addButton.Click += new System.EventHandler(this.addButton_Click); // // removeBinding // this.removeBinding.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.removeBinding.Location = new System.Drawing.Point(136, 256); this.removeBinding.Name = "removeBinding"; this.removeBinding.Size = new System.Drawing.Size(104, 23); this.removeBinding.TabIndex = 3; this.removeBinding.Text = "Remove Binding"; this.removeBinding.Click += new System.EventHandler(this.removeBinding_Click); // // addBinding // this.addBinding.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.addBinding.Location = new System.Drawing.Point(288, 256); this.addBinding.Name = "addBinding"; this.addBinding.Size = new System.Drawing.Size(104, 23); this.addBinding.TabIndex = 4; this.addBinding.Text = "Add Binding"; this.addBinding.Click += new System.EventHandler(this.addBinding_Click); // // TestDataGrid // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 293); this.Controls.Add(this.addBinding); this.Controls.Add(this.removeBinding); this.Controls.Add(this.addButton); this.Controls.Add(this.theGrid); this.Name = "TestDataGrid"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "TestDataGrid"; this.Load += new System.EventHandler(this.TestDataGrid_Load); ((System.ComponentModel.ISupportInitialize)(this.theGrid)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.myDataSet)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.rateTable)).EndInit(); this.ResumeLayout(false); } #endregion #endregion /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void addButton_Click(object sender, System.EventArgs e) { Random random = new Random(idCounter); DataRow row = rateTable.NewRow(); int position = theGrid.CurrentRowIndex + 1; row[0] = idCounter++; row[1] = (int)( random.NextDouble() * 100 ); row[2] = (int)( random.NextDouble() * 10 ); rateTable.Rows.InsertAt( row, position ); rateTable.AcceptChanges(); } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void removeBinding_Click(object sender, System.EventArgs e) { this.theGrid.DataSource = null; } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void addBinding_Click(object sender, System.EventArgs e) { this.theGrid.DataMember = "RateTable"; this.theGrid.DataSource = this.myDataSet; } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void TestDataGrid_Load(object sender, System.EventArgs e) { int numRows = 5; DataRow row; for (int i = 0; i < numRows; i++) { row = rateTable.NewRow(); row[0] = i * 1; row[1] = i * 2; row[2] = i * 3; rateTable.Rows.Add( row ); } } } } Tag: Drag & Drop multiple from ListView Tag: 91153
  - 7
    - Taskbar operation and irregular shaped forms I have created an irregular shaped form using regions and the FormBorderStyle set to none. I am having trouble with the taskbar button for the form not showing the popup menu when right clicked or having any control over the form when left clicking. I am using visual C#.NET 2003 and programming for windows XP. Can anyone answer this question or point me in the right direction. Thank you. Tag: Drag & Drop multiple from ListView Tag: 91148
  - 8
    - how to set Openfiledialog to take directory Hi, I want to select the directories instead of files using the Open or Save file dialog boxes. Is it possible to simulate this? thanks vinod Tag: Drag & Drop multiple from ListView Tag: 91147
  - 9
    - ColorDepth Would there be a problem if I set the ColorDepth of an image list to 24 or 32 bits? It seems to be working OK in my computer but I am wondering if other people will have a problem. I am going to assume that you would have to have a very old computer to not support these color depths, is my assumption correct? Thank you. Tag: Drag & Drop multiple from ListView Tag: 91133
  - 10
    - All capitals by Key Press Hi I am trying to build a windows forms control which derieves from TextBox. The added functionality that i want is that I want every character that appears on the TextBox should be in Capitals. For this i have created a Class iTextBox and Derieved from TextBox and have overriden the OnKeyPress Method Here is the code :- protected override void OnKeyPress(KeyPressEventArgs e) { if(Char.IsLetter(e.KeyChar)) { e = new KeyPressEventArgs(Char.ToUpper(e.KeyChar)); } base.OnKeyPress (e); } But when i test the class it the method runs but the characted is not converted to Upper case. Please help and advice. Manu Singhal Tag: Drag & Drop multiple from ListView Tag: 91132
  - 11
    - Menu suggestion normally with a menu i use a simple switch statement. i'm thinking this is not a very good way of doing it. does anyone have any suggestions on a better way -- Message posted via http://www.dotnetmonster.com Tag: Drag & Drop multiple from ListView Tag: 91130
  - 12
    - Slow WinForm 1st launch I've got a simple winform app written in C# that takes almost 5 seconds to start after a reboot. The from was previously written in VB 6 and took less then 1 second to start. I've tried NGEN but it didn't seem to make a difference. Has anyone been able to solve the slow first launch problem? Thanks Tag: Drag & Drop multiple from ListView Tag: 91125
  - 13
    - Controls in a panel are shown in incorrect order Hi, I've got a graphical application where some child controls are rendered inside a panel. This controls are user drawn and are transparent. The transparency works OK, I've been using Bob Powell tricks (http://www.bobpowell.net/transcontrols.htm). However, there's a big problem: child controls are drawn BACKWARDS its order. For example, if I add two controls and then I execute BringToFront() in one of them, it draws behind the other, but when I click, the mouse events are fired on it (so it is really in front). Below is the most important code from the control, the panel where controls are added is just a simple Panel with a transparent background, I hope if someone could help me. Thanks in advance. === THE CODE === public partial class DrawViewer : UserControl { public DrawViewer() { InitializeComponent(); Initialize(); this.MouseDown += new MouseEventHandler(DrawViewer_MouseDown); this.MouseUp += new MouseEventHandler(DrawViewer_MouseUp); this.MouseMove += new MouseEventHandler(DrawViewer_MouseMove); } #region This allows to drag the control bool dragging = false; int mousex, mousey; void DrawViewer_MouseUp(object sender, MouseEventArgs e) { if (dragging) { dragging = false; mousex = mousey = 0; } } void DrawViewer_MouseMove(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if (dragging) { Point MPosition = (ScrollableControl)this.Parent).PointToClient(MousePosition); MPosition.Offset(mousex, mousey); this.Location = MPosition; this.InvalidateEx(); } } else dragging = false; } void DrawViewer_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { dragging = true; Point MPosition = ((ScrollableControl)this.Parent).PointToClient(MousePosition); mousex = -(MPosition.X - Location.X); mousey = -(MPosition.Y - Location.Y); } } #endregion protected override OnPaint (PaintEventArgs e) { // This just paints } #region This is for supporting transparency protected override CreateParams CreateParams { get { CreateParams cp = base.CreateParams; cp.ExStyle |= 0x20; return cp; } } protected override void OnPaintBackground(PaintEventArgs pevent) { // Nothing } protected override void OnMove(EventArgs e) { InvalidateEx(); } protected override void OnResize(EventArgs e) { InvalidateEx(); } public void InvalidateEx() { try { if (Parent != null) return; Rectangle rc = new Rectangle(this.Location, this.Size); Parent.Invalidate(rc, true); } catch { } } public void Initialize() { SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.SupportsTransparentBackColor, true); // More internal initialization } public override void Refresh() { base.Refresh(); InvalidateEx(); } #endregion Tag: Drag & Drop multiple from ListView Tag: 91124
  - 14
    - MDI Toolbar and Menu merges How does one go about merging the menus and toolbars of a child form into the menus and toolbars of the parent MDI form? I am using vb.net 2003. Any help would be appreciated. Thanks. Tag: Drag & Drop multiple from ListView Tag: 91121
  - 15
    - Datagrid - Windows Forms - Can't see what is in the grid The grid has rows but you can't see them. You see the grid but all rows are completly blue but when you click on a column in the row you see the text that is in the row. I sprinkled datagrid.refresh and application.doevents around but it did not help. It seems like it's memory or video card related. An intersting note is that when this happens when I am on my Dell workstation at the office but when I vpn to that Dell workstation from home I do not get the error. Tag: Drag & Drop multiple from ListView Tag: 91118
  - 16
    - datagridTableStyle question I have a datagridComboBoxColumn in my datagrid. I was wondering if there is any way to generate an event for the the Column that would trigger a routine that in turn populates couple of TextBoxColumns in the same datagrid. The Datagrid uses DataGridTableStyle for it's mapping and customization. Tag: Drag & Drop multiple from ListView Tag: 91114
  - 17
    - Embed PDF in Winforms Good Day, Gentlemen: I've been tasked with creating a screen that allows users to double-click items from list of filenames. Each filename in the list corresponds to a PDF file. On double-click, the corresponding PDF file should be displayed. The catch is that the PDF viewer needs to be embedded *inside* my WinForms app, as opposed to being externally launched. The user needs to be able to scroll through the PDF and optionally print it. Does anyone know how to do this? I don't mind purchasing a 3rd party component, so long as it's a fully managed .NET component. Help a brother out, Jules Tag: Drag & Drop multiple from ListView Tag: 91111
  - 18
    - Access 2002 like Combobox in .NET 2003 We are trying to rebuild a current Access 2002 (XP) mdb program to VB.NET with a SQL database - we are having problems with a suitable combobox. There are many threads discussing multiple column comboboxes in .NET. We are having success with the multiple columns similar to the combobox from Access 2002 (XP). Our biggest problem is speed. In a form in Access 2002, our combobox is able to load data in a table in separate Access database file in a fraction of a second. This table is already sorted in the proper order, and has 65,000 records (almost the limit of items in the Access combobox). For this speed test, the table consists of one field. The records are just integers counting from 1 to 65,000. The Access combobox is filled with data by setting the combobox.RowSource property to equal a SQL Select Statement: SELECT field1 FROM table1 IN 'c:\pathto\database.mde" We tried to do a similar test using the VB.NET combobox with Microsoft SQL Desktop Edition 2000. Same table as above. We tried several approaches including binding to a DataSet, binding to an array (filled the array with DataReader), and using the combobox.Items.AddRange(array). The best result we could get with the 65,000 records was to use a DataReader to fill an Array, then use the combobox.item.addrange - but this was approx. 7 seconds - still slow compared to Access, and too slow for our purpose. This 7 second was during the AddRange step, not during the looping through the DataReader to fill the Array. Filling the Array was very quick. All of our tests indicate the the slow down is getting the information into the combobox, not get the data from the database. Is there a Microsoft suggestion get a large list of data into the combobox quickly the way Access could do it? Is there a third party combobox that can work in VB.NET and load the data quickly, preferable with multiple columns? Any other suggestions? VB.NET solutions are preferable, but we do have VS.NET Pro 2003, so we can support other languages as well. Thank you for all that took the time to read this long message. PS - it was suggested that 65,000 records are too many to be showing to a user. The purpose of this list to allow the patient to select a client/patient from a large and growing list in a medical lab setting. Medical labs are always receiving new patients, and usually only see a patients once or twice. They do need to keep the patient active in case the patient returns. Tag: Drag & Drop multiple from ListView Tag: 91106
  - 19
    - Exception in Timer.Tick/JIT debugging Hi, I posted the following in the m.p.vsnet.debugging group, but it turned out to be a Framework (Timer) problem: <quote> I'm using VB 2003 (VS.Net 2003 IDE) and a WindowsForms project. How can I get *completely* rid of the "Jit-Debugging" dialog box? The one containing the 3 buttons "Details", "continue", "quit" (or "close"; I don't know, I have the German version). I do *not* want to see the dialog when debugging in the IDE. Instead, I'd like the IDE to handle the exception and stop at the line throwing the error. - In the options, Jit-Debugging is enabled for all three items (CLR, native, script). - In machine.config, JitDebugging is enabled. - In menu Debug -> exceptions: Option "CLR exceptions" is set to "jump into debugger" if the exception is not handled. </quote> It's easy to reproduce: 1. Add a Timer (System.Windows.Forms.Timer) to a new WindowsApplication. 2. Set the timer's Enabled property = True. 3. In the timer's tick event, write: Throw New Exception 4. Start Armin Tag: Drag & Drop multiple from ListView Tag: 91105
  - 20
    - Closing an application before it's opened. I've written a C# Windows Forms application. Now I've decided that it needs to check that the user is a member of certain groups as it's opening and close if they're not. A bit of research suggests that I won't be able to close the application before it's finished loading. this.Close() doesn't work in these situations. What's the recognized way of achieving this? I like to do things properly. If I was starting from scratch, would I create the project as a Console Project and use something like: Form1 form1 = new Form1(); form1.ShowDialog(); to display the form? (And find some way to hide the Console window.) Or do I create it as a Windows Application and find run the group membership checks as part of the first (somehow hidden) window and then call the main window with code similar to that above? Simon Tag: Drag & Drop multiple from ListView Tag: 91103
  - 21
    - Mapping from DataGridView to the actual DataRow Hi, I have a DataGridRow which i fill with data from a DataAdapter. Now when the user selects a row in the grid, how do I find out which row datarow in the dataset is "selected"? I got this to work in asp.net 1.1 fairly easy, but how do i do it in winforms 2.0? I know I can just use SelectedRows[0].Cells[0].Value to get the value of the first cell in the selected row, but this is not what I want. What I basically want, is to be able to know which DataRow each DataGridViewRow represents. -- Thomas Due Posted with XanaNews version 1.17.5.9 "If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle." -- Sun-Tzu Tag: Drag & Drop multiple from ListView Tag: 91102
  - 22
    - Bind enabled to listview Can I bind the enabled property on a button to the SelectedItems.Count of a listview (0 or > 0). I have 2 listviews and I want the user to move data between them by clicking a direction button. I would like to bind the enabled property of these buttons to the SelectedItems.Count value of the listviews MAF Tag: Drag & Drop multiple from ListView Tag: 91100
  - 23
    - UITypeEditor or TypeConverter and ExtendedProperty problem I want to place my custom UITypeEditor or TypeConverter on ExtendedProperty. The problem is that ExtendedProperty is not an property but a set and get method. I've tried to place it in Pre and PostFilterProperties methods of Control that was extended by extender component but the property was not there. I don't have any idea what to do now. You don't have to give me the solution just a hint that I can follow up. Tag: Drag & Drop multiple from ListView Tag: 91098
  - 24
    - How to position message box? How to position message box programatically using C# .NET? Thanks. Tag: Drag & Drop multiple from ListView Tag: 91094
  - 25
    - How to delselect items in databound ListBox or ComboBox When I use the DataSource property of a ListBox or ComboBox, there is always a selected item. When I bind the control, I don't want anything selected. I have tried using the .SetSelected() method, setting, selectedIndex to -1 (twice in a row, blah blah), setting SelectedItem to null, etc. listBoxInventorParts.DataSource = _selectedInventorParts; listBoxInventorParts.DisplayMember = "InventorPartNumber"; listBoxInventorParts.ValueMember = "pkInventorPartId"; // Doesn't work listBoxInventorParts.SelectedIndex = -1; // Doesn't work listBoxInventorParts.SelectedItem = null; // Doesn't work listBoxInventorParts.SelectedValue = null; // Doesn't work listBoxInventorParts.ClearSelected(); // Doesn't work for(int i = 0; i < listBoxInventorParts.Items.Count; i++) { listBoxInventorParts.SetSelected(i, false); } Nice. Tag: Drag & Drop multiple from ListView Tag: 91092
- Next
  - 1
    - Draw nice 3D buttons by code in .NET? Hi All, Anyone know how to draw nice 3D buttons like this one by Code in .NET: http://www.econtechvn.com/en/aquabutton_detail.htm Please help me out. Thanks in advance. Tag: Drag & Drop multiple from ListView Tag: 91091
  - 2
    - Interthread communication? Hi, I'm fairly new to C# and .NET. I'm trying to write winforms app that simulates a piece of hardware that our company develops. The hardware behaves as a TCP server and processes commands received from clients. The winforms allows a user to change the state of the simulator, to simulate faults, state changes etc. What I've currently got is a simulator class that will run in its own thread and processes client commands. When the user makes state changes in the winform I need a method to inform the running thread that it needs to reload its internal state. I was hoping to avoid using semaphores by invoking an update method on the simulator thread, but I can't seem to find a way to do this (only from a thread pool thread). Any suggestions on a simple/elegant way of doing this? Are there standard .NET patterns that might help? Thanks, Mark Tag: Drag & Drop multiple from ListView Tag: 91088
  - 3
    - Double row column header in datagrid (Windows Form) This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C59F26.1608DB60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi: I want to create some columns in Datagrid that look like below. There is = a double row column header. Upper row is summary description. Lower row = has 2 columns(Net & Gross). I have no idea how to do it. Do you have any = idea about it? ----------------- Claim To Date ----------------- Net | Gross ----------------- 32.00 | 72.45 ----------------- 23.27 | 25.47 Thanks Dennis Huang ------=_NextPart_000_0006_01C59F26.1608DB60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT size=3D2>Hi:</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>I want to create some columns in Datagrid that look = like=20 below. There is a double row column header. Upper row is summary = description.=20 Lower row has 2 columns(Net & Gross). I have no idea how to do it. = Do you=20 have any idea about it?</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>-----------------</FONT></DIV> <DIV><FONT size=3D2>Claim To Date</FONT></DIV> <DIV><FONT size=3D2>-----------------</FONT></DIV> <DIV><FONT size=3D2>Net    | Gross</FONT></DIV> <DIV><FONT size=3D2>-----------------</FONT></DIV> <DIV><FONT size=3D2>32.00 | 72.45</FONT></DIV> <DIV><FONT size=3D2>-----------------</FONT></DIV> <DIV><FONT size=3D2>23.27 | 25.47</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Thanks</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Dennis Huang</FONT></DIV></BODY></HTML> ------=_NextPart_000_0006_01C59F26.1608DB60-- Tag: Drag & Drop multiple from ListView Tag: 91087
  - 4
    - Crystal Viewer Control Bug ? Hi, I've used the crystal report viewer in Window forms several times and have got the hang of logging into servers and passing parameters at runtime. I've written this new crystal report which works fine in the Crystal design editor during preview but on the same dataset it dosen't work in the dotnet windows form control. The report loads fine into the control it's just the Crystal scripts I have put against events inside the report EG suppress group and suppress fields don't run if I view the report through the viewer control. It looks like a bug as the report works fine through the editor and the dataset is the same. Any help on this subject would be great thanks. Regards. Mike. Tag: Drag & Drop multiple from ListView Tag: 91085
  - 5
    - Flicker Problems when Drawing a Custom Radio Button Hi All, I have created a radio button that uses images instead of the silly "circle" for a touch-screen kiosk application where users will have to use their large fingers to select radio buttons. For some reason, however, I can not get the damn thing to stop flickering! Would anybody (with past experience in this) be able to look at my code and see what they think? It would be greatly appreciated! This is what I've got.. using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; namespace System.Windows.Forms { /// <summary> /// Summary description for UserControl1. /// </summary> public class KioskRadioButton : RadioButton { public Image ImageSelected { get { return myImageSelected; } set { myImageSelected = value; } } private Image myImageSelected; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public KioskRadioButton() { // This call is required by the Windows.Forms Form Designer. InitializeComponent(); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.DoubleBuffer, true); } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Component Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { components = new System.ComponentModel.Container(); this.Paint += new PaintEventHandler(MyRadioButton_Paint); } #endregion private void MyRadioButton_Paint(object sender, PaintEventArgs e) { if (this.Checked) { e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed; e.Graphics.Clear(this.BackColor); e.Graphics.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), this.Image.Width + 5, e.ClipRectangle.Height/2 - this.Font.Height/2); e.Graphics.DrawImage(this.ImageSelected, 0, e.ClipRectangle.Height/2 - this.ImageSelected.Height/2); } else { e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed; e.Graphics.Clear(this.BackColor); e.Graphics.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), this.Image.Width + 5, e.ClipRectangle.Height/2 - this.Font.Height/2); e.Graphics.DrawImage(this.Image, 0, e.ClipRectangle.Height/2 - this.Image.Height/2); } } } } Thank you!! Tag: Drag & Drop multiple from ListView Tag: 91083
  - 6
    - Is this a bug? Create a new Windows project and a button on it, on the click event of the button add the following code: Cursor.Current = System.Windows.Forms.Cursors.Cross; Run the project and click on the button, It was my understanding that the cursor should change but it does not, it only changes as long as the code is running for example, replace the previous code with the following: Cursor.Current = System.Windows.Forms.Cursors.Cross; System.Threading.Thread.Sleep(1000); This will change the cursor for one second. Note that the cursor only changes when the thread is bussy inside the click event. Is this a bug? Tag: Drag & Drop multiple from ListView Tag: 91082
  - 7
    - Problem Solution Explorer and forms I just noticed a very bizarre situation. In Solution Explorer, some of my forms did not display their forms icon, but rather a class icon. (This particular solution is under VSS control.) Therefore, I cannot see the form in the forms designer. Most of the forms are inherited from FormBase, which only contains a status bar with panels. Most of the forms are locked. I checked-out one form, and immediately its icon changed to the regular forms icon in Solution Explorer. I then undid the check-in, and the icon remained as the forms icon. I don't mind this 'work-around', but this technique worked on all the forms except for one. Any ideas? TIA Tag: Drag & Drop multiple from ListView Tag: 91080
  - 8
    - HDC System.ArguementException in IE emdedded control Hello, I am having a problem on a a PC where it throws an unhandled exception in in a embedded control in IE. The exception is a System.ArgumentException and I cannot even catch it to find out where it is coming from... I have a try..catch in loading the control, so that should catch all the errors. Help, as this happens intermitently but costs alot for the client when this happens. Any and all help will greatly be appreciated. Thanks, Bryan Tag: Drag & Drop multiple from ListView Tag: 91079
  - 9
    - How to find what control is under the mouse pointer Hi, Does anyone know any way to find what control is under the mouse pointer? In my application (MDI forms application) I need to track mouse move events and find what control is currently under the mouse, it can be MDI child form, button, label, etc. Maybe some Win API function which finds Handle of the object so I could convert it to Control using FromHandle method? Or some .NET managed method? Thank you for the help, Oleg Tag: Drag & Drop multiple from ListView Tag: 91077
  - 10
    - DataGrid - InsertAt() - Error Modifying rows after new row inserte After inserting a new data row to a DataTable that is bound to a datagrid, I am unable to change data in a row that is after the newly added row without getting bizarre results. I have added the full code for the test below. Create a project drop in the code and run. Any help would be appreciated. Cheers, Dave Test #1 ====================== 1) Click on the row where ID = 1 2) Click "Add Row" button 3) Click on the cell ID = 2 Number = 4 4) Change the number from 4 to 5 5) Move off the row (i.e. hit the down arrow key) 6) Notice there are 2 rows with ID = 2 now 2, 5, 6 2, 4, 6 Test #2 ====================== 1) Click on the row where ID = 1 2) Click "Add Row" button 3) Click "Remove Binding" 4) Click "Add Binding" 5) Click on the cell ID = 2 Number = 4 6) Change the number from 4 to 5 7) Move off the row (i.e. hit the down arrow key) 8) Notice there are 2 rows with ID = 2 now 2, 5, 6 2, 4, 6 ========================== using System; using System.Data; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; namespace Controls { /// <summary> /// Summary description for TestDataGrid. /// </summary> public class TestDataGrid : System.Windows.Forms.Form { private int idCounter = 100; #region Unimportant Window stuff private System.Windows.Forms.DataGrid theGrid; private System.Windows.Forms.Button addButton; private System.Data.DataSet myDataSet; private System.Data.DataTable rateTable; private System.Data.DataColumn dataColumn1; private System.Data.DataColumn dataColumn2; private System.Data.DataColumn dataColumn3; private System.Windows.Forms.Button removeBinding; private System.Windows.Forms.Button addBinding; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public TestDataGrid() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.theGrid = new System.Windows.Forms.DataGrid(); this.myDataSet = new System.Data.DataSet(); this.rateTable = new System.Data.DataTable(); this.dataColumn1 = new System.Data.DataColumn(); this.dataColumn2 = new System.Data.DataColumn(); this.dataColumn3 = new System.Data.DataColumn(); this.addButton = new System.Windows.Forms.Button(); this.removeBinding = new System.Windows.Forms.Button(); this.addBinding = new System.Windows.Forms.Button(); ((System.ComponentModel.ISupportInitialize)(this.theGrid)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.myDataSet)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.rateTable)).BeginInit(); this.SuspendLayout(); // // theGrid // this.theGrid.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.theGrid.DataMember = "RateTable"; this.theGrid.DataSource = this.myDataSet; this.theGrid.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.theGrid.Location = new System.Drawing.Point(8, 40); this.theGrid.Name = "theGrid"; this.theGrid.Size = new System.Drawing.Size(368, 184); this.theGrid.TabIndex = 0; // // myDataSet // this.myDataSet.DataSetName = "NewDataSet"; this.myDataSet.Locale = new System.Globalization.CultureInfo("en-US"); this.myDataSet.Tables.AddRange(new System.Data.DataTable[] { this.rateTable}); // // rateTable // this.rateTable.Columns.AddRange(new System.Data.DataColumn[] { this.dataColumn1, this.dataColumn2, this.dataColumn3}); this.rateTable.TableName = "RateTable"; // // dataColumn1 // this.dataColumn1.ColumnName = "ID"; this.dataColumn1.DataType = typeof(int); // // dataColumn2 // this.dataColumn2.ColumnName = "Number"; this.dataColumn2.DataType = typeof(int); // // dataColumn3 // this.dataColumn3.ColumnName = "Price"; this.dataColumn3.DataType = typeof(int); // // addButton // this.addButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.addButton.Location = new System.Drawing.Point(16, 256); this.addButton.Name = "addButton"; this.addButton.TabIndex = 1; this.addButton.Text = "Add Row"; this.addButton.Click += new System.EventHandler(this.addButton_Click); // // removeBinding // this.removeBinding.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.removeBinding.Location = new System.Drawing.Point(136, 256); this.removeBinding.Name = "removeBinding"; this.removeBinding.Size = new System.Drawing.Size(104, 23); this.removeBinding.TabIndex = 3; this.removeBinding.Text = "Remove Binding"; this.removeBinding.Click += new System.EventHandler(this.removeBinding_Click); // // addBinding // this.addBinding.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.addBinding.Location = new System.Drawing.Point(288, 256); this.addBinding.Name = "addBinding"; this.addBinding.Size = new System.Drawing.Size(104, 23); this.addBinding.TabIndex = 4; this.addBinding.Text = "Add Binding"; this.addBinding.Click += new System.EventHandler(this.addBinding_Click); // // TestDataGrid // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 293); this.Controls.Add(this.addBinding); this.Controls.Add(this.removeBinding); this.Controls.Add(this.addButton); this.Controls.Add(this.theGrid); this.Name = "TestDataGrid"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "TestDataGrid"; this.Load += new System.EventHandler(this.TestDataGrid_Load); ((System.ComponentModel.ISupportInitialize)(this.theGrid)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.myDataSet)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.rateTable)).EndInit(); this.ResumeLayout(false); } #endregion #endregion /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void addButton_Click(object sender, System.EventArgs e) { Random random = new Random(idCounter); DataRow row = rateTable.NewRow(); int position = theGrid.CurrentRowIndex + 1; row[0] = idCounter++; row[1] = (int)( random.NextDouble() * 100 ); row[2] = (int)( random.NextDouble() * 10 ); rateTable.Rows.InsertAt( row, position ); rateTable.AcceptChanges(); } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void removeBinding_Click(object sender, System.EventArgs e) { this.theGrid.DataSource = null; } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void addBinding_Click(object sender, System.EventArgs e) { this.theGrid.DataMember = "RateTable"; this.theGrid.DataSource = this.myDataSet; } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void TestDataGrid_Load(object sender, System.EventArgs e) { int numRows = 5; DataRow row; for (int i = 0; i < numRows; i++) { row = rateTable.NewRow(); row[0] = i * 1; row[1] = i * 2; row[2] = i * 3; rateTable.Rows.Add( row ); } } } } Tag: Drag & Drop multiple from ListView Tag: 91075
  - 11
    - PropertyGrid and input events Hello. Why in PropertyGrid dont fired my event handlers on mouse and keyboard events? Is it bug or legal behavior? Tag: Drag & Drop multiple from ListView Tag: 91073
  - 12
    - Issue w/ Property Grid and unhandled exceptions I am having an issue with the Windows Forms Property Grid control. Unhandled exceptions that occur in my custom TypeConverter are being suppressed. Example, I have created a custom TypeConverter that inherits from System.ComponentModel.ExpandableObjectConverter. I have a coding error in the ConvertTo function. When the Property Grid control fires the ConvertTo method, an unhandled exception should be raised, but it isn't. The only thing that happens is that the ConvertTo function stops executing at the point of the exception and the next statement on the call stack is executed. Now obviously, if I have no coding errors, this wouldn't be a concern, but I am human and do make mistakes (rarely, LOL) so this does concern me because I could look over coding errors during testing since the IDE/debugger is not reporting the unhandled exception. Exceptions in other parts of the application work fine. Is the Property Grid suppressing exceptions? Any help would be greatly appreciated. Tag: Drag & Drop multiple from ListView Tag: 91072
  - 13
    - RichTextBox manipulating the client area Hi I am trying to create a code editor using the RichTextBox as a base. One objective is to implement a "gutter" in which line numbers can be displayed. From much searching of the web it would appear that this should be possible by modifying the size of the client and non-client areas within the control. I have foud some examples (in various languages) that implement similar behaviour on different base classes. When I try to apply the logic within these examples to the RichTextBox I am getting "out of memory" exceptions. The code I am working with is as follows... [StructLayout(LayoutKind.Sequential)] internal struct RECT { public int Left; public int Top; public int Right; public int Bottom; } [StructLayout(LayoutKind.Sequential)] internal struct NCCALCSIZE_PARAMS { public RECT rgrc0; public RECT rgrc1; public RECT rgrc2; public IntPtr lppos; } [StructLayout(LayoutKind.Sequential)] internal struct WINDOWPOS { public IntPtr hwnd; public IntPtr hWndInsertAfter; public int x; public int y; public int cx; public int cy; public uint flags; } ....... protected override void WndProc(ref Message m) { switch (m.Msg) { case WM_NCCALCSIZE: { if(m.WParam == IntPtr.Zero) { NCCALCSIZE_PARAMS nccsp; nccsp = (NCCALCSIZE_PARAMS)Marshal.PtrToStructure(m.LParam, typeof(NCCALCSIZE_PARAMS)); // NOTE: Any attempt to reference nccspp.lppos causes an out of memory exception - it is a zero pointer // WINDOWPOS wp; // wp = (WINDOWPOS)Marshal.PtrToStructure(nccspp.lppos, typeof(WINDOWPOS)); // NOTE: The values returned in rgrc0 appear to be valid window co-ordinates however some examples indicate // that these should be set to the co-ordinates from the WINDOWPOS structure returned from nccsp.lppos nccsp.rgrc0.Left += 15; // NOTE: Any attempt to set the values of rgrc1 causes an out of memory exception // nccsp.rgrc1.Left = nccsp.rgrc0.Left; // nccsp.rgrc1.Right = nccsp.rgrc0.Right; // nccsp.rgrc1.Top = nccsp.rgrc0.Top; // nccsp.rgrc1.Bottom = nccsp.rgrc0.Bottom; } break; } default: { break; } } base.WndProc (ref m); } Can anyone explain where I am going worng with this? Thanks in advance Andrew Wiles Tag: Drag & Drop multiple from ListView Tag: 91064
  - 14
    - Binding custom objects and comboboxes Hi I have a custom object (LineItem) which has a property that is another custom object (LineItemType) I am trying to use binding with with a combo box on a form but cannot get it working correctly without exposing the LineItemType key publicly in the LineItem object Is it not possible (using binding) to set the datasource of a combobox to a collection of LineItemTypes (deriving from CollectionBase and ITypedList), setting the display member, and then using code similar to what is below to have two way binding comboBox1.DataBindings.Add("SelectedValue", _lineItem, "LineItemType"); I was hoping to be able to do this without exposing the LineItemTypeKey in the LineItem object and setting the LineItemTypeKey as the ValueMember in the combo. Rgds Steve Tag: Drag & Drop multiple from ListView Tag: 91063
  - 15
    - Outlook bar Hello, I am developing a C++/CLI winforms application. In Outlook 2000 and 2002 there is vertical bar on the left hand side which allows the user to switch between modules (Mail, Calendar, etc). 1. Is there a similar control for .NET that comes close to that? Or 2. Whats is the best way to replicate that using standard .NET controls like Button etc. Rasika. Tag: Drag & Drop multiple from ListView Tag: 91059
  - 16
    - DRAWIMAGE() -> TONS OF PAGE FAULTS! Originally, I thought this was due to DoubleBuffer, but ran some further experiments and discovered that page faults occur when calling DrawImage(). For example, create 2 images about 800x800, then call DrawImage to copy from to the other (on say a mouse click). Notice about 600+ page faults occur each time (the larger the area, the greater the number of page faults). I have an application that calls DrawImage() once a second to update the main screen, so after a few days, the page fault count is monsterous. I swear this bogs down my system too. Anyone else have this problem? Any solutions? Can someone report this as a DEFECT. Thanks, Steve Tag: Drag & Drop multiple from ListView Tag: 91058
  - 17
    - SQL Server does not exist or access denied. I build a .net window app and created a setup package. The package includes the framework and installs it if necessary. I successfully installed on several machines with no problems, the app runs perfectly. However on one machine when I run the app I get the error: ' SQL server does not exist or access denied.' We have checked our network and every thing looks fines. Does any one know what the problem is? Tag: Drag & Drop multiple from ListView Tag: 91057
  - 18
    - Is it possible to have Min/Max buttons AND Help button on a form's title bar? And more... Hello, I guess the subject line says it all. Does anyone know why this restriction exists? It does seem rather arbitrary. Also, can the helpbutton's behavior be mapped to another button, like one in a toolbar? Can the question mark cursor be invoked other than by clicking on the help button? Thanks! Keith Tag: Drag & Drop multiple from ListView Tag: 91052
  - 19
    - DataGridColumnStyle issue I've hit a wierd issue with the DataGridColumnStyle. I've got a DataGrid that has a DateTimePicker column. Using the example from the msdn i've created a class that inherits DataGridColumnStyle to host the DateTimePicker: public class DataGridTimePickerColumn:DataGridColumnStyle { private DateTimePicker myDateTimePicker = new DateTimePicker(); } and of course it includes all the other methods needed to make it run. I also used the same method to add a ComboBox column to the datagrid. These classes worked just fine until recently, the datagrid would load you could click on the column and get a DateTimePicker object and select a date. Today I noticed that when I click either column all I get is a TextBox. So I checked the class and found that Design View is now showing the following error for both classes: The designer must create an instance of type 'System.Windows.Forms.DataGridColumnStyle' but it cannot because the type is declared as abstract. I have done several updates lately for ASP.Net and and the Framework. I also had an Office XP update that messed with this project, the solution has 2 projects and after the update I loaded it and only one project was present so I had to re-add the second project. Any help would be greatly appreciated. Dave Hagerich Tag: Drag & Drop multiple from ListView Tag: 91049
  - 20
    - RichTextBox how to catch CUT and PASTE? I have a problem with the RichTextBox Control. I need to catch CUT and PASTE (on ctrl+X and Ctrl+V). So I subclassed RichTextBox, and overrode WndProc looking for WM_PASTE and WM_CUT (0x0302 and 0x0300). But I don't get these messages on Ctrl+X or Ctrl+V. If I subclass a TextBox, I catch the messages as expected, but not in a RichTextBox. I do get these messages if I call the Paste() and Cut() methods directly, but not on the shortcut keys. Does anyone know how to catch these? Tag: Drag & Drop multiple from ListView Tag: 91048
  - 21
    - IExtenderProvider and Type Property I've spent several hours on Google and founds 100's of entries that get close to the answer, but can't quite get there. I'm creating an component that acts as an ExtenderProvider for other components. One of the properties that it exposes is a class I've created that itself has a number of properties. I've created a type converter that is based on ExpandableObjectConverter. Overrode the GetCreateInstanceSupported, CreateInstance, CanConvertTo, and ConvertTo methods. Here is the problem: The only way I can get it to work correctly is to create an InstanceDescriptor based on a constructor that has ALL the properties. The class is pretty complex and I'd rather not have to have to reference all the properties in a constructor, InstanceDescriptor, etc. Is there a way to do this with an ExtenderProvider, just use a few key properties in the InstanceDescriptor and have any other properties serialized the usual way (i.e. the DesignerSerializationVisibility.Content? If I set DesignerSerializationVisibility on the GetXXXXX method of the ExtenderProvider, it seems to treat it as a property of the actual component. Seems like I remember seeing something about this before, but can't find the examples anywhere. Thanks in advance for any help. Didn't see a group for just .Designer issues, so thought I'd start here. Tag: Drag & Drop multiple from ListView Tag: 91045
  - 22
    - TypeConverter for a UserControl I am working on a custom DataGridColumnStyle that can host a UserControl. I have created a public property on this ColumnStyle of type MyUserControlBase. I would like to be able to set this property in the PropertyGrid by choosing from a list of UserControls that inherit from MyUserControlBase. Using a TypeConverter that inherits from TypeList Converter, I have been able to get the property to show up in the PropertyGrid and I can even get the drop-down list to show the list of UserControls. But when I select one of them, I get a designtime error of "Invalid property value - Object type cannot be converted to target type." I have tried numerous combinations of overriding CanConvertFrom/ConvertFrom & CanConvertTo/ConvertTo without success. Can someone give me a push in the right direction? Thanks. Tony Tag: Drag & Drop multiple from ListView Tag: 91044
  - 23
    - Is a 3rd party "Provisioning Engine" to a populate Hierarchical Grid available? Hi all I need to write an application where a hierarchical grid can be populated by a set of data from a database. The set of data that will populate the grid will be determined by the properties of a number of class objects. Is there any 3rd party solution that can cope with this? I know I can write code to create a number of datasets with relations and bind them to a grid, but I was wondering if there was a 3rd party product to do all of this so all I have to do is just say to the 3rd party product in one line of code: "add this object to the grid and display its hierarchy". Thanks for any help. Andrew Tag: Drag & Drop multiple from ListView Tag: 91041
  - 24
    - thumbnail of file (like explorer does) Is there anyway to get a thumbnail of a file similar to the way explorer does that can be used in an application? I want to for example if i drag a file over a picture box, if it has the ability to have a thumbnail, show it in the picture box. thanks! Tag: Drag & Drop multiple from ListView Tag: 91037
  - 25
    - LVM_GETITEMTEXT does not work Hi, I'm trying to access listview control in a VB application from C# application. Follwoing is my code StructLayoutAttribute(LayoutKi=ADnd.Sequential)] public struct LV_ITEM { public UInt32 mask; public Int32 iItem; public Int32 iSubItem; public UInt32 state; public UInt32 stateMask; public String pszText; public Int32 cchTextMax; public Int32 iImage; public IntPtr lParam; }const int BUFFER_SIZE =3D 512; LV.iItem =3D 3; LV.mask =3D Win32API.LVIF_IMAGE; LV.cchTextMax =3D 255; LV.iSubItem =3D 0; LV.pszText =3D new String('\0', 255); Win32API.SendMessage(hWnd, Win32API.LVM_GETITEMTEXT, 3, ref LV); string text =3D LV.pszText.ToString(); My definations are as given below. const int LVM_FIRST =3D 0x1000; const int LVM_GETITEMCOUNT =3D LVM_FIRST + 4; const int LVM_GETITEM =3D LVM_FIRST + 5; const int LVIF_TEXT =3D 0x0001; LVM_GETITEMTEXT =3D (LVM_FIRST + 45); [DllImport("user32.dll")] static extern int SendMessage(IntPtr window, int message, int wparam, ref LV_ITEM lparam); My Problem is pszText always returns empty string. Please help.=20 Thanks in advance.=20 J Tag: Drag & Drop multiple from ListView Tag: 91034

I have a problem with the ListView control.

I want to be able to drag and drop multiple items, much like in Windows
Explorer. I can do the drag-drop fine, but the problem is the
MultiSelect property. If I enable this, rather than just having Shift
and Ctrl selections with the mouse, it gives me a multi-select where
you drag over the list with the mouse.

I don't want this. I want to disable the drag-over selection, because
it interferes with my drag & drop operations.

Anyone know how to do this?

Thanks,
Campbell

Top