UITypeEditor or TypeConverter and ExtendedProperty problem

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- Previous
  - 1
    - How to position message box? How to position message box programatically using C# .NET? Thanks. Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91094
  - 2
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91092
  - 3
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91091
  - 4
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91088
  - 5
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91087
  - 6
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91085
  - 7
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91083
  - 8
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91082
  - 9
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91080
  - 10
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91079
  - 11
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91077
  - 12
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91075
  - 13
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91073
  - 14
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91072
  - 15
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91064
  - 16
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91063
  - 17
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91059
  - 18
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91058
  - 19
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91057
  - 20
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91052
  - 21
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91049
  - 22
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91048
  - 23
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91045
  - 24
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91044
  - 25
    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91041
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    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91037
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    - 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: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91034
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    - DoubleBuffer PageFaults? Hi, I notice that my app (with a double buffer form) throws TONS of page faults whenever it refreshes. I googled, and found the same complaint on GotDotNet. Does anyone have any info on this, or could at least get this in the BUG QUEUE! Thanks, Steve Serious GDI+ bug on VS 2005 Posted on: 07/21/2005 07:41:23 Hi Id be interested in hearing if anyone else can see this bug, it is VERY easy to try and repro, really very easy. Create a new basic windows app, C# will do. In the forms constructor put this before or after the InitializeComponent call: this.SetStyle(ControlStyles.OptimizedDoubleBuffer,true); build and run the app. Use task manager to observe the processes PF delta. Vertically enlarge the form. It will be observed that the process generates many thousands of page faults per second, with a full screen app at 1600 x 1200 I have seen in excess of 50,000 PFs per second! The problem is always present. The problem also happens if we set DoubleBuffer property; although this s described as Obsolete in the latest beta documentation. The problem occurs with both 16-bit and 32-bit color settings. It occurs at 1600x1200 and 1024x768 It occurs with desktop style set to Classic or Windows XP It occurs when I use the NVidia driver for my GeForce FX 5200 or if I boot XP in VGA mode (thus forcing it to use a different driver). It occurts on both Win XP Professional (32-bit) and Windows XP Proferssional 64 for AMD (The OEM version, NOT a beta) I am using an Athlon 64 3400+, 1Gig and Asus K8V-SE DeLuxe motherboard. Basically the fault seems to be independent of driver, color depth, resolution, refresh rate and operating system. By not calling SetStyle for DoubleBuffer or OptimizeDoubleBuffer the problem goes away, but the app then suffers from very bad flickering. Setting both styles has no effect either. This was first reported in bug: FDBK23039 but was then only seen in a test version of a complex app that also uses some sophisticated class libraries (under development) and some complex unmanaged (unsafe) library (also under development) and naturally this was the main suspect, since it access lots of memory and could have lay behind the page faulting. Since the problem can very easily be reproduced with almost no effort, it is now clear that it lies somewhere in the Framework, GDI+ or possibly some component of XP (common to both 32-bit and 64-bit ?) I have reported this to MS, althoung I cant disguise my intense frustration at the apalling quality of their bug reporting system, after entering this detailed report (that took me several hours to carefully test and document) the stupid web based bug system refuses to accept > 2000 chars, forcing me to hastily edit and break it up and making almost impossible to now follow. Anyway I am very very curious to see if anyone else gets (or doesnt get) this behavior. H Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91020
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    - turn off scroolbars in mdi parent Hi, I tried to turn of the scrollbars in a MDI-Parent-From, but it does not work :-(. Here my init code: private void InitializeComponent() { this.AutoScale = false; this.ControlBox = false; this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; this.IsMdiContainer = true; this.Name = "Dashboard"; this.ShowInTaskbar = false; this.Text = "Dashboard"; this.VScroll = false; this.HScroll = false; this.WindowState = System.Windows.Forms.FormWindowState.Maximized; } How can i turn of the scrollbars? Please dont ask me why i wanna do this ;-) regards henrik Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91019
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    - Textbox Enter-key Beep I'm writing a winforms app in vb.net 1.1 and have an issue when users click the enter key on a textbox. It make a beep sound as if an error had occurred. how can I turn off the beep sound? I'm actually trapping the key up event and when the user uses the enter key I do something. Any good advise? I saw some other posts on this but they had already expired and were no longer on the server. Thanks. -- moondaddy@nospam.nospam Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91017
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    - How To get the image drawn in MFC ? Hi, I am trying to print an image drawn in MFC, by using Graphics object in C#. My problem is that, I am able to print just the visible part of the image. How could I get the part of an image which is not visible due to scrolling ? Below is the code:- // Get a Graphics object associated with the screen. Graphics grfxViewport = Graphics.FromHwnd(this.Handle); // Create a bitmap the size of the Window. bm = new Bitmap((int) grfxViewport.VisibleClipBounds.Width , (int) grfxViewport.VisibleClipBounds.Height , grfxViewport); // Create a Graphics object associated with the bitmap. Graphics grfxBitmap = Graphics.FromImage(bm); // Get hdc's associated with the Graphics objects. IntPtr hdcViewport = grfxViewport.GetHdc(); IntPtr hdcBitmap = grfxBitmap.GetHdc(); BitBlt(hdcBitmap, 0, 0, bm.Width, bm.Height,hdcViewport, 0, 0,0x00CC0020); grfxBitmap.ReleaseHdc(hdcBitmap); grfxViewport.ReleaseHdc(hdcViewport); // Manually dispose of the Graphics objects. grfxBitmap.Dispose(); grfxViewport.Dispose(); Invalidate(); Thanks, -Brajesh Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91016
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    - How to design UI I'm going to start a windows-form application ,but I am not very familiar with techniques in windows-forms.I'm an ASP.NET developer and pretty familliar with a lot of things like user controls,Framework and libraries around.I was thinking about strating with a sample to design the UI of my application.I don;t want it to be a lot fancy ,but it should be decent too,because it will make the skeleotn of my app.Dose anyone can guid me to a sample or refence to do so? Thanks Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91013
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    - Background shows while switching between forms I have an multi-form application, which uses owner drawn buttons that use bitmaps. I switch between forms using: public void ActivateForm(FormBase form) { if (form == this.activeForm) return; form.Show(); form.Enabled = true; this.activeForm.Hide(); this.activeForm = form; } The switching works fine, but a very brief moment when the switching occurs, the background shows, causing a flicker-like effect. I should mention that the application is on .NET CF. I am also compiling it to .NET, where all the code is shared except for a hand full of lines using #if(PocketPC). The flicker-like effect is also present on the PC, but much less so, probably because of the faster hardware. I have tried double-buffering drawing the whole form, using the form's OnPaint() rather than the controls' OnPaint(), but this seemed to slow down the drawing further, and the flicker is more pronounced on the desktop but shows a white background, rather than what is behind the form. And the bitmap buttons dont even show up on .NET CF, just the background. Looks to me like double-buffering is out. The bitmap buttons use transparent bitmaps, but I tried using regular bitmaps, but the problem still exists, in both CF and regular .NET. Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91010
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    - Datagrid Multiselection by pressing Shift + Ctrl + Down Arrow Hi, How do I stop multiselection when a user pressing Shift + Ctrl + Down Arrow keys in data grid. Actually it is selecting all the rows from the current position. I want only one record to be selected at a time. I can do this when Shift + down arrow is pressed but have got no clue how to do it when Shift + Ctrl + Down Arrow is pressed together. Please help! Regards. Raj Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91008
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    - Need to write a Kiosk style program in VB.net Hello. I need to create a Kiosk style program using VB.Net. I have maximized the window, set the window style, etc. I need to know how to trap all keyboard events so that the user cannot access anything outside of my app. Does anyone know of a good resource that demonstrates how to do this? Thanks in advance, Mike Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91005
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    - Thread.CurrentPrincipal casting Code like following will cause InvalidCastException under VS .NET 2005 beta: WindowsPrincipal MyPrincipal = (WindowsPrincipal) Thread.CurrentPrincipal; Which was from: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconusingdeclarativesecurity.asp My questions are: 1) whether the above code will work under earlier version of .NET framework or not, 2) and whether there are more changes like this-which make me worry whether they would cause backward compatibility issues. Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91004
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    - MSComm and deploy I have written an app that uses the MSComm ocx, the .NET IDE creates a Interop.MSCOmmLib.dll wrapper. I copy the executable and the wrapper to the client machine, but the application fails to run, presumably this is because the MSComm ocx is not registered on the target machine, my question is how to I deploy the application when it is using MSComm? I have never registered an ActiveX before. Thanks, Joseph Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91002
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    - UIP and existing Forms Is it possible to use the UIP block with an existing form not derived from WindowsFormView? For example, can I place controls derived from WindowsFormControlView onto a custom dialog and have them managed by the UIProcess classes without having the dialog itself derived from WindowsFormView? There are no examples in the QuickStarts to illustrate such a procedure, and modifying the custom dialog code to inherit WindowsFormView is not an option. Thanks, Andrew. Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 91000
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    - Render Windows Form to graphics object/bitmap I need to be able to force a form or control to render itself to a graphics bitmap instead of (or as well as) the screen device. This is not the same as basic capture/print screen functionality. It would almost have to emulate a screen or something... I feel some nifty APIs would probably do the trick, but I was hoping for a fully fledged .NET solution. The only article I have come across that's of any use is this: http://www.winformreports.co.uk/ The functionality I require is basically this: "... By hooking into the printing mechanism of the .NET runtime it is able to draw the controls on your Windows Form straight to the PrintPreviewDialog or Printer..." If anyone has any more thoughts on this please let me know. Thanks, Tom Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90994
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    - Unhandled Exception when cancelling print from PrintPreviewDialog My app uses PrintPreviewDialog to allow the user to preview and print. If the user selects print from the toolbar, and the current printer settings are set to print to a file, a "Print to File" dialog asks them to enter a filename. If at this point they press Cancel, they get an unhandled exception (see below). What is strange is that I have a catch for the exception, and all seems OK when debugging, but it is not handled when the end user does this. Any ideas why the exception is not caught? [XP Pro SP2, .Net 1.1 SP1, VS 2003] Code sample: PrintPreviewDialog dlgPreview = new PrintPreviewDialog(); try { dlgPreview.Document = m_printDoc; dlgPreview.ShowDialog(this); } catch(Win32Exception ex) { // inform the user of the problem MessageBox.Show(ex.Message, "Printing", MessageBoxButtons.OK, MessageBoxIcon.Information); } Exception Text: System.ComponentModel.Win32Exception: The operation was canceled by the user at System.Windows.Forms.PrintControllerWithStatusDialog.OnStartPrint (PrintDocument document, PrintEventArgs e) at System.Drawing.Printing.PrintController.Print(PrintDocument document) at System.Drawing.Printing.PrintDocument.Print() at System.Windows.Forms.PrintPreviewDialog.ToolBarClick(Object source, ToolBarButtonClickEventArgs eventargs) at System.Windows.Forms.ToolBar.OnButtonClick(ToolBarButtonClickEventArgs e) at System.Windows.Forms.ToolBar.WmReflectCommand(Message& m) at System.Windows.Forms.ToolBar.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90993
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    - Changing scrollbar width, thumbsize etc Is there any way programatically change the scrollbar width and thumb size for any of the standard windows forms controls (ListBox, ListView DataGrid etc) without having to set the system wide settings in Control Panel ? I'd prefer not to have to do an owner drawn scrollbar, because you then have to deal with XP themes. Thanks Steve Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90986
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    - MDI Forms. Opacity Hi, is it possible to make the MDI Parent form transparent and set the child form opacity to 100%? thanks Henrik Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90983
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    - EnableVisualStyles, ComboBox, ShowDialog? hi all, I encounter problems when calling Form.ShowDialog() in a ComboBox.SelectedIndexChanged-EventHandler. After the EventHandler is executed a SEHException is thrown. This only happens if EnableVisualStyles was called (see sample code). Is this a known problem? is there a workaround other than not using VisualStyles? pp VS 2003 (7.1.3088) .NET 1.1 (1.1.4322) #####code##### using System; using System.Windows.Forms; namespace EnableVisualStylesComboBox { public class Form1 : Form { private System.Windows.Forms.ComboBox comboBox1; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); comboBox1.Items.Add("Item 0"); } private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e) { new Form().ShowDialog(); } #region dispose protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #endregion #region designer private void InitializeComponent() { this.comboBox1 = new System.Windows.Forms.ComboBox(); this.SuspendLayout(); // // comboBox1 // this.comboBox1.Location = new System.Drawing.Point(20, 20); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(250, 21); this.comboBox1.TabIndex = 0; this.comboBox1.Text = "Select an item and close the popup form."; this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(292, 66); this.Controls.Add(this.comboBox1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion [STAThread] static void Main() { Application.EnableVisualStyles(); Application.DoEvents(); Application.Run(new Form1()); } } } Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90980
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    - consuming windows service in web application HI I am working on a ASP.Net web application. I have to build a windows service which will have functions that returns Current Systems CPUID etc... I need to consume this Windows service with my ASP.Net web application. How can I do this? Is it possible to do so? thanks in advance... Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90977
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    - StateImageIndex of ListViewItem < 15. Why?? Hi! Does anybody know why ListViewItems aren't allowed to get StateImageIndexes that are greater than 14?? Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90975
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    - ListView with Check Boxes, Disallow check I have a ListView with the first column as check box. I want to disallow check of a listview item if it's status (as found in one of the listview subitems) is 0. Can't determine how to do this. Thanks for any assistance. Michael Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90973
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    - Fast maximizing/minimizing of form I'm using .NET 1.1 and need my forms to maximize and minimize as fast as possible, without the standard window dragging that usually occurs. Does anyone know a way to do this? Also, how can I make a form the foreground window on the desktop? Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90972
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    - ComboBox data binding I am having trouble binding a ComboBox to an object. I have a student object that has a property 'FirstYear' which is a year object. My ComboBox contains a collection of year objects as its data source. If I use the following code when initializing the form: this.comboFirstYear.SelectedItem = ostudent.FirstYear; The ComboBox shows the proper value. If however I bind the ComboBox using the following: this.comboFirstYear.DataBindings.Add("SelectedItem", ostudent, "FirstYear"); it does not work. Shouldn't the two be roughly equivalent? I am really hoping that I do not have to add events to set the object value for every combobox that I have like this. Any help is appreciated. Thanks, Jon Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90969
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    - Combo pull-down contents? I have a weird problem. VS2003, all windows updates made, create a new winform project, add one combobox to the default form, add 2 words to the "items" in the combobox. When I run it, If I pull down the combobox, there are 2 rows displayed, but they are entirely white (like white font on white background??)... I can select one and it shows up correctly in the combobox, but the pull-down always is white. Any ideas? Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90968
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    - CLIPBOARD: How to add several images and strings at once? Hi, I have an array of items, each having an image and description. I would like to programatically copy them all to the clipboard (for pasting into say a Word document). I've tried the following code, thinking SetData keeps appending info to the clipboard, but when I paste into Word, I only get the last description from the last item in my list (no images). What am I doing wrong here? private void CopySelectedItemsToClipboard() { IDataObject ido = new DataObject(); foreach MyItems myItem in items) { if (myItem.selected) { ido.SetData(DataFormats.Bitmap, myItem.image); ido.SetData(DataFormats.Text, myItem.description); } } Clipboard.SetDataObject(ido, true); Steve Tag: UITypeEditor or TypeConverter and ExtendedProperty problem Tag: 90961

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.

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