Combo box drop down

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
    - Embedded form and Anchor property The following situation: Panel control with Dock=Fill, inside a panel an embedded form with controls in it. The code embedding the form into the panel is this: pnl.Controls.Add(form1); Everything is working perfect, except the Anchor property of controls on the embedded form is not working. The form has a grid that should be anchored to all four sides, however, because the form is embedded into the panel, this whole design is not working. Am I missing anything? Any workaround? Thank you in advance. Cezar Tag: Combo box drop down Tag: 85104
  - 2
    - Bug in DataGrid.CommitEdit (.Net v1.1) After many hours of debugging, I've finally come to the conclusion that there is a bug in DataGrid's CommitEdit. I have the following situation: I've a custom DataGridColumnStyle (for a ComboBox, who hasn't done one of these?). If no selection is made (e.g. SelectedIndex == -1), I want to abort the commit. Problem is, when my DataGridColumnStyle.Commit override is called and returns false, DataGrid.CommitEdit causes a NullReferenceException to be thrown. I'm using the following code: /// <code> bool retValue = false; try { int index = this._Combo.SelectedIndex; if ( index >= 0 ) { object value; if ( this._Combo.ValueMember == null ) value = this._Combo.SelectedItem; else value = this._Combo.SelectedValue; this.SetColumnValueAtRow( source, rowNum, value ); retValue = true; } } catch(Exception) {} this.EndEdit(); return retValue; /// </code> I googled some posts and saw people having the same problem, but I saw no explanations. Not satisified (and lacking a solution), I fired up WinDbg, SOS and Reflector. The disassembler DataGrid.CommitEdit is: /// <code> private bool CommitEdit() { if ((!this.gridState[0x8000] && !this.gridState[0x4000]) || this.gridState[0x10000]) { return true; } this.gridState[0x10000] = true; if (this.editColumn.ReadOnly || this.gridState[0x100000]) { if (base.ContainsFocus) { if (this.gridState[0x800]) { this.FocusInternal(); } this.editColumn.ConcedeFocus(); if ((this.gridState[0x800] && base.CanFocus) && !this.Focused) { this.FocusInternal(); } } this.gridState[0x10000] = false; return true; } bool flag1 = this.editColumn.Commit(this.ListManager, this.currentRow); this.gridState[0x10000] = false; if (flag1) { this.gridState[0x8000] = false; } return flag1; } /// </code> In WinDbg, I broke on the exception thrown and took a look at the object dump for the datagrid. Turns out that the first if statement evaluates to false. On the second if statement (if (this.editColumn.ReadOnly ...), DataGrid.editColumn is null, hence the exception. The full stack trace leading up to the exception is: System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.DataGrid.CommitEdit() at System.Windows.Forms.DataGrid.EndEdit() at System.Windows.Forms.DataGrid.Edit(String instantText) at System.Windows.Forms.DataGrid.Edit() at System.Windows.Forms.DataGrid.set_CurrentCell(DataGridCell value) at System.Windows.Forms.DataGrid.OnMouseDown(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.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) The exact context of the crash is, I'm editting my combo box column, then click another column (with a selected index == -1, causing my Commit to return false). Oddly enough, if I cancel editting by clicking a control outside of the data grid (e.g. not causing another cell to gain focus), no error occurs until the data grid once again has a cell gain focus. Can anyone confirm/reproduce this? If necessary, I'll throw together a toned-down application to reproduce the error. Thanks, Nathan Tag: Combo box drop down Tag: 85101
  - 3
    - Cannot set form background image I recently started using VisualStudio.Net for the first time. I started a project and created some forms to gain an understanding of how to use C#, Visual Studio, and the .Net framework. One of the first things I did was to create a non-standard window with rounded corners and set the background image of the form. I set the background image by simply opening the form properties and clicking the "..." button next to the BackgroundImage property and selected an image to use as the background, in this case it was a JPG, and all was fine. I could see the background image in Visual Studio and when I ran my application. Sometime later I created a new project and started developing a small and real application. I decided to add a splash screen. I wanted to use a bitmap I created as the backgroud of the splash screen. As before I opened the form properties and clicked the "..." button next the BackgroundImage property and selected the bitmap only to receive an error "Empty path name is not legal". I tried selecting several different images with the same result. I then copied images to c:\ and tried selecting from there with the same result. I thought I must have been doing something differently then I had done with the first project in which I sucessfully set the background image. I tried setting the background image in the first project, thining it would work, but it did not. I got the same error. So I closed everything down and rebooted, thinking this might help, but it did not help. What the heck is going on? Has anyone ever encountered this problem? Did I inadvertently change some critical environment setting that is causing this problem? I am baffled! Tag: Combo box drop down Tag: 85100
  - 4
    - TabControl/TabPage VisibleChanged event problem I am using the VisibleChanged event of the tabpage to add/remove main menu bar items. When I receive the visiblechanged event and the visible=true I add the main menu item and when I receive the event and visible=false I remove the main menu item. Everything works great, switching between the tabs works great. The problem comes in when I remove a tabpage from the tabcontrol. The tabpage receives one final visiblechanged event with visible set to true and I add the menu item back to the main menu. Is this a bug in the framework? The tab page is not in fact visible, but I don't receive any further visiblechanged events to indicate this. Any one have any work arounds for this? Any other suggestions on how to implement main menu items for each tab page? Or any other suggestion on how to hide a tab on the tab control without removing it. Thanks, Tom. Tag: Combo box drop down Tag: 85096
  - 5
    - Tabindex major trouble Hello. I have a form with a tab control with some tabpages. On each of the tabpages I have separate user controls. The user controls constist of labels, textboxes, combo boxes and datagrids. The problem is that I can't move focus between the input controls with the tab button. At all. All my controls have the TabStop property set to True, and have a positive number. The form is inherited from a form which in turn is inherited from a windows form. All of the controls I use are my own, inherited from windows controls. What could possibly be wrong? Where should I look? Thanks - Niklas Tag: Combo box drop down Tag: 85095
  - 6
    - Random Exceptions in WinForms Application Periodically users are experiencing a crash of a .Net WinForms application running on Windows 2000. The application displays a MessageBox that is created in the handler for the Application.ThreadException event and the application terminates. The crashes seem to be random in that the users are not doing the same thing in the application when they crash nor can any other pattern be discerned. We have been unable to reproduce the problem. Resolution: The application needs to be restarted. Any unsaved information is lost. Sample Stack Trace: Type: System.NullReferenceException Message: Object reference not set to an instance of an object. StackTrace: at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam) at System.Windows.Forms.NativeWindow.DefWndProc(Message& m) at System.Windows.Forms.Control.DefWndProc(Message& m) at System.Windows.Forms.Control.WmUpdateUIState(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ContainerControl.WndProc(Message& m) at System.Windows.Forms.ParkingWindow.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: Combo box drop down Tag: 85094
  - 7
    - Parameter ?_1 has no default value I'm using the HierCube .net OLAP component from rainbowsoft (http://www.rbwsoft.com/) in a vb winform application (vs2003). The data source is an MS Access 2000 table; the data adapter is of the oledb type; and the sql string has two parameters ala =? At runtime the app provides values for the params like so: oledaPivotData.SelectCommand.Parameters("Conversion").Value = cboConversion.SelectedValue oledaPivotData.SelectCommand.Parameters("Year").Value = cboYear.SelectedValue The cube works fine. However the cube control won't let me access the Dimension Mapping facility, it complains that "Parameter ?_1 has no default value". I'm not sure how to solve this. I've written to the control developers, but they can be slow to respond...and this issue seems to be more generic than specific to this control. I've not been able to find a discussion here that deals with my situation, most other cases are using SPs. Tag: Combo box drop down Tag: 85092
  - 8
    - Centre form in MDI Hi Am new to VB.NET and wondering how to centre my form in the mdi that is maximised or set to a diferent size. I tried this wTop = (frmMDI.Size.Height - frm.Size.Height) \ 2 wLeft = (frmMDI.Size.Width - frm.Size.Width) \ 2 frm.Location = New Point(wLeft, wTop) Main problem is when the mdi form is maximised, the size reported is not the new size but the size set at design time. -------------------------------- From: 99pshop ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>S5mkO9K/CkSal1+Yq3wnyQ==</Id> Tag: Combo box drop down Tag: 85089
  - 9
    - Smart Client and satellite assemblies Hi, we have a Windows.Forms application having several assemblies for which we have defined satellite assemblies in seperate folders according to the culture they were created in. We had to adjust the policy to full trust (each of the assemblies are sign with same key) in order to allow the download of the .exe using IE. The download of the application works but when we try to display information in the correct language it fails to do so because the correct satellite assembly was not downloaded (checked using Fusionvwlog). Has any one any clues what's going wrong? Thanks ! Stefaan Tag: Combo box drop down Tag: 85087
  - 10
    - hotkeys trouble Hello, maybe someone have faced with this problem: I have a control with some textboxes, labels and buttons. Buttons have a keybord shortcut i.e. button1.Text = "Bro&wse"; the problem is that this shortcut works only when focus is on any control that has a tabindex number less than a button. It doesn't work with a focus on this button also. This problem confirms only on Windows 2000. The same app on WinXP works as expected, and has no troubles. Framework 1.1 is installed on both. Any suggestions and links on articles will be appreciated. Thanks Tag: Combo box drop down Tag: 85086
  - 11
    - Custom Order in Property Grid Control How to Implement Custom Order in Property Grid Control in C# ? I Implemented PropertyGrid.PropertySort = PropertySort.NoSort but it is Displaying in Some other Order. I want to specify the Order for Properties in the PropertyGrid Please Help. Thanks in Advance. Srinivas. -- Message posted via http://www.dotnetmonster.com Tag: Combo box drop down Tag: 85085
  - 12
    - Turn off blue bar at top of DataGrid Hi, Is there a way of removing the blue bar that appears at the top of a DataGrid? Thanks, Steve Tag: Combo box drop down Tag: 85084
  - 13
    - Deleting from a table via a dataset positioning problem I'm getting very confused trying to make my "Delete" button work. All looked ok at first, with: Private Sub DeleteButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DeleteButton.Click Dim pos As Integer = GetPosition() If MsgBox("Delete record " + Str(pos) + " (" + StatusString(pos) + ")?", MsgBoxStyle.YesNo) = MsgBoxResult.Yes Then TextBox1.AppendText("Deleting " + Str(pos) + " (" + StatusString(pos) + ")" + Chr(13) + Chr(10)) DataSet11.Tables("table").Rows(pos).Delete() End If End Sub Function GetPosition() As Integer GetPosition = Me.BindingContext(DataSet11, "table").Position End Function Function StatusString(ByVal pos As Integer) As String Dim drsi As DataRowState = DataSet11.Tables("table").Rows(pos).RowState Dim drss As String = "" If (drsi And 1) <> 0 Then drss = drss + "Detached " If (drsi And 2) <> 0 Then drss = drss + "Unchanged " If (drsi And 4) <> 0 Then drss = drss + "Added " If (drsi And 8) <> 0 Then drss = drss + "Deleted " If (drsi And 16) <> 0 Then drss = drss + "Modified" StatusString = drss End Function The msgbox says "Delete record 0 (Unchanged)?", and after clicking Yes, the values in the textboxes, bound to various fields in "table", do change to show those in the second record (ie record 1). But when I click again on Delete, the msgbox now says "Delete record 0 (Deleted)?", and clicking Yes has no effect. Even worse, I've found that after getting to the last record with... Private Sub TopButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TopButton.Click Me.BindingContext(DataSet11, "table").Position = _ Me.BindingContext(DataSet11, "table").Position.MaxValue End Sub ..then back to the second-from-last with... Private Sub DownButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DownButton.Click Me.BindingContext(DataSet11, "table").Position -= 1 End Sub ..(second-from-last rec shows ok), then Delete, the msgbox says "Delete record 88 (Unchanged)?", which is good. But after deleting it, (and the display going back to show rec 0 again for some reason) and then going to the last record again and clicking Delete again, the msgbox says "Delete record 88 (Deleted)?"!! (I have a 'debug' text box which shows the statuses of the last few records ('rows', I should say), and that clearly shows record 88 as Deleted, and 89 as Unchanged.) Whew! Thanks, if anybody's read this far. I'm confused. I'm clearly not getting something. Help Please? *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: Combo box drop down Tag: 85083
  - 14
    - Two Combobox in datagrid Hi, I have 2 combobox in datagrid, one parent(display CATEGORY) & another one is child(display SUB_CATEGORY). I want if user select item in parent(CATEGORY) the correct list of SUB_CATEGORY will be display in child combobox. The code below I'm using RowFilter to filter SUB_CATEGORY but it's not working. Private Sub MakeDataSetAndBindGrid() Dim sqlString As String = "SELECT PRO_CATEGORY_ID,PRO_ID_NUM,COM_ID_NUM,CATEGORY_ID,SUB_CATEGORY_ID FROM CIS_PRO_CATEGORY" dataAdapter = Nothing myDataSet = Nothing Try dataAdapter = New OleDbDataAdapter(sqlString, connection) myDataSet = New DataSet dataAdapter.Fill(myDataSet, "CIS_PRO_CATEGORY") sqlString = "SELECT CATEGORY_ID,CATEGORY_DESCRIPTION FROM MST_CATEGORY ORDER BY CATEGORY_ID" dataAdapter = New OleDbDataAdapter(sqlString, connection) dataAdapter.Fill(myDataSet, "MST_CATEGORY") dataAdapter = Nothing sqlString = "SELECT SUB_CATEGORY_ID,CATEGORY_ID,SUB_CATEGORY_DESCRIPTION FROM MST_SUB_CATEGORY" dataAdapter = New OleDbDataAdapter(sqlString, connection) dataAdapter.Fill(myDataSet, "MST_SUB_CATEGORY") dataAdapter = Nothing connection.Close() tableStyle.MappingName = "CIS_PRO_CATEGORY" Dim dt As DataTable = myDataSet.Tables("CIS_PRO_CATEGORY") Dim i As Integer While i < dt.Columns.Count If i < 3 Then Dim TextCol As New DataGridTextBoxColumn TextCol.MappingName = dt.Columns(i).ColumnName TextCol.HeaderText = dt.Columns(i).ColumnName tableStyle.GridColumnStyles.Add(TextCol) ElseIf i = 3 Then Dim ComboCateg As New DataGridComboBoxColumn ComboCateg.MappingName = "CATEGORY_ID" ComboCateg.HeaderText = "CATEGORY_ID" ComboCateg.Width = 120 ComboCateg.NullText = "" ComboCateg.ColumnComboBox.DataSource = myDataSet.Tables("MST_CATEGORY").DefaultView 'dv; ComboCateg.ColumnComboBox.DisplayMember = "CATEGORY_DESCRIPTION" ComboCateg.ColumnComboBox.ValueMember = "CATEGORY_ID" 'Create event handlers AddHandler ComboCateg.ColumnComboBox.SelectedIndexChanged, AddressOf ComboCategClick tableStyle.PreferredRowHeight = ComboCateg.ColumnComboBox.Height + 2 tableStyle.GridColumnStyles.Add(ComboCateg) Else myDataView = New DataView(myDataSet.Tables("MST_SUB_CATEGORY")) Dim ComboSubCateg As New DataGridComboBoxColumn ComboSubCateg.MappingName = "SUB_CATEGORY_ID" ComboSubCateg.HeaderText = "SUB_CATEGORY_ID" ComboSubCateg.Width = 120 ComboSubCateg.NullText = "" ComboSubCateg.ColumnComboBox.DataSource = myDataView ComboSubCateg.ColumnComboBox.DisplayMember = "SUB_CATEGORY_DESCRIPTION" ComboSubCateg.ColumnComboBox.ValueMember = "SUB_CATEGORY_ID" tableStyle.PreferredRowHeight = ComboSubCateg.ColumnComboBox.Height + 2 tableStyle.GridColumnStyles.Add(ComboSubCateg) End If i = i + 1 End While DataGrid1.TableStyles.Clear() DataGrid1.TableStyles.Add(tableStyle) DataGrid1.DataSource = dt Catch ex As Exception MessageBox.Show("Error: " & ex.ToString) Me.Close() Return End Try End Sub Public Sub ComboCategClick(ByVal sender As Object, ByVal e As System.EventArgs) Dim lxCombo As ComboBox = DirectCast(sender, ComboBox) If Microsoft.VisualBasic.IsNothing(lxCombo.SelectedValue) = False Then myDataView.RowFilter = "CATEGORY_ID=" & lxCombo.SelectedValue.ToString() End If End Sub Somebody have mention about using "Relations" but I don't have any idea how to use that. Thanks in advance Tag: Combo box drop down Tag: 85082
  - 15
    - Disabling maximise button affects maximised form size...? I've just noticed that if I set a form's window state to be maximized, and also disable the maximize button on the title bar, then the form will cover the task bar. If I enable the Maximize button, then the form does not cover the task bar. I assume this is 'by design'.... but I need a window that has no maximize button (so the user cannot 'de-maximize it) but also I don't want it to cover the task bar. Is this possible through some other nefarious means? Cheers Ant Tag: Combo box drop down Tag: 85081
  - 16
    - Activate issue: not activated or active window on load I have a MDI application, but that isn't important, and why I posted it here instead of the MDI forum. I have class "App Loader" that contains Main. It loads a splash screen that shows up before the main window, and it runs on a background thread. It shows up while the app is loading. Once the app has loaded all the required resources, the main form is shown and activated. On Win 2003 and Win2K, the "app" flashes in the taskbar, but doesn't show up as the active window in the foreground. If you run it by clicking the EXE from within Windows Explorer, after it loads, Explorer is still the active window. I tried: //make this puppy come to front and activated Application.DoEvents(); this.TopMost = true; this.TopMost = false; this.BringToFront(); this.Activate(); This did improve the behaviour on XP, but not Win2K and Win2003. Thanks for the help, Josh Blair Tag: Combo box drop down Tag: 85076
  - 17
    - What's wrong with DataView I have such sentence in my program: {... ... DataView dataView = new DataView(dataSet.Tables[0]); Console.Writeline(dataView.Count.toString());} And this module runs very frequently. There are ten records in the Tables[0] . But in one of PC with XP SP2, we can only get one record from dataView. That means dataView.Count.toString() is 1. Why? Tag: Combo box drop down Tag: 85072
  - 18
    - Debug makes Windows freezing? I used Visual Studio 2003/Windows XP SP1 to create a window application. At the form, I put a button and run debug. I put some break point on the Load event of form and it works fine. I also put a break point at click button event and click the button, but I never get the break point at the click button event. The Windows system seems freezing. I can not call other program. I can not use ALT-CTRL-DEL keys to restart the computer. But the Task Manager, which I started before debug, still displays the system parameters. The CPU usage is only 2 or 3 percent. The Mem Usage seems to be normal, too. I reinstalled the Visual Studio and I still got the problem. Could some one help me to solve the problem? Thanks - George Tag: Combo box drop down Tag: 85070
  - 19
    - XmlDataDocument.load second time Hi All, I have this xml file and loaded it by XmlDataDocument.load function. After XmlDataDocument.load function called, I need to load another xml file into XmlDataDocument again. I want to clear existing data in XmlDataDocument and I want to load new data into that XmlDataDocument . So I called XmlDataDocument.load second time. But it failed by giving some error message. And I was not able to modify the Dataset loaded in XmlDataDocument. Will somebody please recommand how to clear existing data and load again? Any suggestion is appreciated. Thanks Shwe Tag: Combo box drop down Tag: 85069
  - 20
    - ANN: 9Rays FlyGrid.Net 1.0 is released. FlyGrid.Net 1.0 is released! 9Rays.Net is proving that great things indeed come in small packages. Having enjoyed success in beta preliminary release versions, FlyGrid.Net is taking off in full release, promising to deliver a fast and highly customizable Tree/Grid for Windows Forms in only 340Kb. See the feature list and screenshots of FlyGrid on the http://9rays.flygrid.net page. Complete package available for download: complete documentation with C# and VB.Net syntax, C# and VB.Net samples included, Delphi.Net samples coming soon. -- Best regards, Victor Victorov 9Rays.Net Tag: Combo box drop down Tag: 85067
  - 21
    - Databinding Combobox to ArrayList (again: argh!) An ArrayList contains Person objects with Properties Name, Age, Phone. A Windows Form displays - TextBoxes for these properties as well as - a ComboBox for the Name and - VCR Buttons First/Previous/Next/Last. DataBinding should display the correct information in the textboxes no matter if navigation happens through the VCR buttons or the combobox. The combobox should always contain the same information as the txtName textbox. I tried several combinations of defining the databinding. No matter what combination of the following lines I used, I get errors from "stack overflow" to metadata/type info displayed in the combobox. txtName.DataBindings.Add("Text", myPersons, "Name") txtAge.DataBindings.Add("Text", myPersons, "Age") txtPhone.DataBindings.Add("Text", myPersons, "Phone") cboName.DataBindings.Add("Text", myPersons, "Name") cboName.DataSource = myPersons cboName.DisplayMember = "Name" cboName.ValueMember = "Name" 1) What is wrong? 2) How does the code need to be changed if objects should be added and deleted from the arraylist by additional buttons? thank you, herbert Tag: Combo box drop down Tag: 85065
  - 22
    - Can't access digital camera to copy from in code I am trying to copy pictures from a digital camera in code. When I use the FolderBrowserDialog, it won't let me select the camera as the folder. I have gotten around this by using Shell32.BrowseForFolder. I am then also able to get the names of the files. However, the path is a pidl (i believe). So I am unable to utilize .Net IO classes to manipulate the files. This is windows form that ultimately will allow the user to browse for a camera, pick a client, then ftp pictures to the server for later processing. Thanks, Glen Tag: Combo box drop down Tag: 85064
  - 23
    - borderless combobox How can I create a borderless System.Windows.Forms.ComboBox? -------------------------------- From: dan fisherman ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>wKQR1Ld6dk20hPr9P+yd1w==</Id> Tag: Combo box drop down Tag: 85063
  - 24
    - adding a checkbox to a datagrid i've read about everything i can find online about this, but nothing seems to work right. the info is queried from MySql and entered into a dataset and the dataset is bound to the datagrid. the first field is either a 1 or 0 and i want it to display as a check box, but when the checkboxes show up they are all checked (i've double checked the data and there are 1's and 0's. how can i make the right ones show the right things? currently i have this: DataGrid LC; CurrencyManager CMLC DataSet dsLC = dbc.BrowseATable("labor", "hasbom, code, description, price, rec"); //function does the MySQL Query and returns the DataSet DataView dvLC = new DataView(dsLC.Tables["labor"]); dvLC.Sort = "code"; dgdLC.DataSource = dvLC; CMLC = (System.Windows.Forms.CurrencyManager)dgdLC.BindingContext[dvLC]; DataGridTableStyle tableStyle = new DataGridTableStyle(); tableStyle.MappingName = "labor"; tableStyle.AlternatingBackColor = Color.LightBlue; tableStyle.SelectionBackColor = Color.Yellow; tableStyle.SelectionForeColor = Color.Black; tableStyle.RowHeadersVisible = false; //bom DataGridColumnStyle bomCol = new DataGridBoolColumn(); bomCol.MappingName = "hasbom"; bomCol.Width = 50; bomCol.HeaderText = "BOM"; bomCol.AllowNull = false; tableStyle.GridColumnStyles.Add(bomCol); //code DataGridTextBoxColumn codeCol = new DataGridTextBoxColumn(); codeCol.MappingName = "code"; codeCol.HeaderText = "Code"; codeCol.Width = 100; tableStyle.GridColumnStyles.Add(codeCol); //description DataGridTextBoxColumn desCol = new DataGridTextBoxColumn(); desCol.MappingName = "description"; desCol.HeaderText = "Description"; desCol.Width = 200; tableStyle.GridColumnStyles.Add(desCol); //price DataGridTextBoxColumn priceCol = new DataGridTextBoxColumn(); priceCol.MappingName = "price"; priceCol.HeaderText = "Price"; priceCol.Format = "c"; priceCol.Width = 50; tableStyle.GridColumnStyles.Add(priceCol); //rec DataGridTextBoxColumn recCol = new DataGridTextBoxColumn(); recCol.MappingName = "rec"; recCol.Width = 0; tableStyle.GridColumnStyles.Add(recCol); dgdLC.TableStyles.Add(tableStyle) Thanx in advance Tag: Combo box drop down Tag: 85060
  - 25
    - Datagrid exception I have a .NET windows forms application with one form displaying data. I have a tree view on the left side and the datagrid on the right side. Tree view allows the user to select verious items and based on that selection the datagrid is bound to the appropriate datasource and table from the database. This works well. The problem comes when I resize my form and the grid portion is not visible or just barely visible. Now when I perform the same operations by selecting various items in the tree I get an exception System.ArgumentException with Message : '0' is not a valid value for 'value'. 'value' should be between 'minimum' and 'maximum'. Source : System.Windows.Forms. This happens when I call SetDataBinding method. When I again resize the form so that the grid is more visible this problem goes away. I have also seen a bizzare display with red cross over the entire grid area when I resize the grid again. Is this a known issue in the datagrid ? Can somebody help me ? Thanks Tag: Combo box drop down Tag: 85050
- Next
  - 1
    - bound comboboxes I have three comboboxes on the form. When the record is displayed, all the three combo boxes are blank. If I select a value in the first combo box, and click save, the first value in the other combo box is displayed automatically. However, if I go to the next record and come back, those 2 combo boxes are correctly shown as blank. Is this a known issue? Any workarounds ? Thanks Tag: Combo box drop down Tag: 85045
  - 2
    - WinForm Startup Error I am getting an "'Application' is an ambiguous reference" error when I try to start my WinForms appllication. How can the Application object be ambiguous? Any ideas what I did wrong? Thanks. I am using C# and VS2003. I have declared references: using System; using System.Windows.Forms; using System.ComponentModel; The error occurs in: [STAThread] public static void Main() { try { Global.MainForm = new frmMain(); Application.Run(Global.MainForm); <======== 'Application' is an ambiguous reference SetupSplashScreen(); GetConfigurationData(); if(ValidDB) { InitializeObjects(); } } catch(Exception ex) { MessageBox.Show(ex.Message, "MainForm",MessageBoxButtons.OK, MessageBoxIcon.Stop); } } Tag: Combo box drop down Tag: 85042
  - 3
    - Chart Control for VB.NET? Hello, I need to add charting to my application. I didn't have this need before so I missed the resource kit free offer. How can I get a registration key for the resource kit now? Microsoft said they distributed 750k copies. Help please. /Alexis Tag: Combo box drop down Tag: 85039
  - 4
    - PropertyGrid - TypeConverter (DropDown) - Internet Explorer hosting problem Hi, I have created a Windows UserControl. This Control hosts a PropertyGrid and a Button control. The UserControl project also includes a class called "TestClass" and a custom TypeConvertor class called "DDConv". When the user clicks on the Button control, the application assigns an instance of "TestClass" to the PropertyGrid. The "TestClass" has a property called "CustProp" and it has an TypeConverter attribute assigned to the "CustProp" property. The TypeConvertor points to the "DDConv" class. The PropertyGrid in the UserControl displays a DropDown against the "CustProp" property when the UserControl is hosted in a windows application. When the UserControl is hosted in Internet Explorer, the PropertyGrid does NOT SHOW any DropDown for the "CustProp" property. NOTE: I test the UserControl in Internet Explorer from a virtual directory on my machine. I have set "FullTrust" for the "LocalIntranet_Zone" on my machine. I want the PropertyGrid to display the DropDown in Internet Explorer - can someone help me in figuring out how to acheive the same? 'TestClass.vb Public Class TestClass Dim _name As String Dim _ddProp As String Public Property Name() As String Get Return _name End Get Set(ByVal Value As String) _name = Value End Set End Property <System.ComponentModel.TypeConverter(GetType(DDConv))> _ Public Property CustProp() As String Get Return _ddProp End Get Set(ByVal Value As String) _ddProp = Value End Set End Property End Class 'DDConv.vb Public Class DDConv Inherits System.ComponentModel.StringConverter Dim _values As String() Dim _restrictToList As Boolean Public Sub New() _values = New String() {"Yes", "No"} End Sub Public Overloads Overrides Function GetStandardValuesSupported _ (ByVal context As _ System.ComponentModel.ITypeDescriptorContext) As Boolean Return True End Function Public Overloads Overrides Function GetStandardValues(ByVal _ context As System.ComponentModel.ITypeDescriptorContext) _ As _ System.ComponentModel.TypeConverter.StandardValuesCollection Return New StandardValuesCollection(_values) End Function Public Overloads Overrides Function GetStandardValuesExclusive _ (ByVal context As _ System.ComponentModel.ITypeDescriptorContext) As Boolean Return _restrictToList End Function End Class Thanks & Regards, Dhwanil Shah dhwanil.shah@patni.com -- Message posted via http://www.dotnetmonster.com Tag: Combo box drop down Tag: 85038
  - 5
    - Passing parameters to forms Hi all, I have a function that handles opening child forms in a MDIContainer, I want the child forms to accept a parameter to setup the form when opening. So I simply overloaded the constructor to accept the parameter...that easy enough, however the function that opens the form checks first to see if it's already open and if so just sets focus to that window. Does anybody know how I can setup the form before giving it focus this way? Thanks Gav Tag: Combo box drop down Tag: 85034
  - 6
    - Working with Tabs Hello I'm writing an APP for an PocketPC Because of the small Size of the Display I want to use Tabs! The problem is, if I work with the VS-Designer It puts all Code in one File. I also have to put some code there to prepare Data for Viewing. Thats why I fear that i loose the overview in the file Is there some way to easily split the tabs in extra files and also use the FormDesigner of VS.net? I know I can do everything dynamicly but then I lose the advanteges of the Form Designer. Norbert Tag: Combo box drop down Tag: 85027
  - 7
    - A simple Q: there any performance penalty by extensive data bindin I have like 50 controls from data grid and textboxes bound to a dataset in windows form. Some one told me the extensive data binding will slow down the aplication. Does it really perform slower than manually set the textbox values by "ControName.Text=ValueString"? Tag: Combo box drop down Tag: 85024
  - 8
    - Events in Derived Classes Hi, I am deriving a windows control into a custom class. How can I "re-declare" the events to make them available for use in the new, derived class? I'm using C++ .net, will I will interpret any help I can get. Thanks. . Tag: Combo box drop down Tag: 85017
  - 9
    - Calling parents functions Hi all, Is it possible to call a mdicontainer's function from a child window? Basically I have an function in the main MDIContainer form which opens child forms, it accepts an enumerator to know which form to open, also it checks to see if the form is already open so that it doesn't open it more than once. I want one of my child forms to open a different child form by calling this function. Any help would be great thanks Gav Tag: Combo box drop down Tag: 85013
  - 10
    - How to embed a form in a form? This is what I would like to do: - The splitter window splitting the view to a tree view on the left and entry dialog on the right. The tree view and splitter are easy and it's already done. - It is easy to make a fixed form on the right pane, dock it and enjoy it working. However, I would like the form on the right pane to be dynamic, i.e., depending on a context of the tree view to display different controls and being managed by a different form derived class. In MFC I could accomplish this with child dialogs embedded in a parent dialog and depending on the tree context flipping the child dialogs visible/invisible. I can do the same in .NET by using panels with embedded controls, however, this way everything must be done in the runtime and I lose advantage of designing a forms in a design time and taking advantage of .NET studio wizards. If I could find a way to embed a child form in a parent form, then it would solve my problem. Is it possible? Thanks Tag: Combo box drop down Tag: 85012
  - 11
    - Editing a form in VisualStudio Using Visual C# .NET. I have successfully created my own Windows forms from scratch and been able to view and edit both the code and the designer (i.e. right click on the .cs file in the Solution Explorer pane and select View Code or View Designer.) I'm also modifying existing code, and have also successfully edited existing classes using View Code and View Designer. However, in one particular project there is a folder in which I cannot View Designer for the form class - the only option is View Code. Also, the icon shown is different from the usually forms classes - it's not the gray "control-looking" icon, but the green/white "text-looking" option. Both a .cs and a .resx file exist for form classes in question. This is code I got out of a library and my colleague is able to View Designer on these classes just fine. Any idea what's wrong? Tag: Combo box drop down Tag: 85010
  - 12
    - TreeView Is there a way to make the parent node not display a checkbox but each child node have one? Thank you in advance, Pauly C Tag: Combo box drop down Tag: 85007
  - 13
    - sendmail hangs when I declare an api function I have a simple mailsys solution that works splendidly. I decided to add a listview with file association icons to replace a listbox that displays the full path only of an attachment. But when I add this (which I need to get the file association icons): Private Declare Ansi Function SHGetFileInfo Lib "shell32.dll" (ByVal pszPath As String, ByVal dwFileAttributes As Integer, ByRef psfi As SHFILEINFO, ByVal cbFileInfo As Integer, ByVal uFlags As Integer) As IntPtr The system now runs but hangs once I call sendmail. Without this call in the declarations section above the load event, the system works fine. Any ideas why just having a call like this in the declarations section would hang up sendmail? Thanks for any help. Bernie Yaeger Tag: Combo box drop down Tag: 85006
  - 14
    - How to create Previous/Next Page button on Scrollbar? Hi, is there a property on the VScrollbar to activate this feature or is custom coding required? This feature exists on MS Word's vertical scrollbar and I would like to add this feature to my VB.NET Windows app (to the scrollbar on a DataGrid and a TreeView). Any suggestions? Thanks in advance. Tag: Combo box drop down Tag: 85000
  - 15
    - NativeMethods.POINT/PointToScreen problem hi i am using managed directx/directdraw (i know deprecated) to draw something in windowed mode, and durng flipping the backbuffer i use Control::PointToScreen to flip to the correct place on the screen. using the new clr profiler 2.0 i found out that i have growing NativeMethods.POINT allocations which are connected to Control::PointToScreen (checked that using the allocation graph) not using Control::PointToScreen solves the growing problem. why does that happen? how do i clean up those POINTs? or what other way is there it get a point in screen coordinates? regards florian Tag: Combo box drop down Tag: 84997
  - 16
    - Bind IList to DataGrid Hi, I have an array that I am binding to a datagrid, however I do not want all the columns to be visible (eg the ID). The way to do this, I believe, is to set up a DataGridTableStyle and DataGridColumnStyle, but how do I map my array to the DataGridTableStyle as my array does not have a table name? Thanks, Steve Tag: Combo box drop down Tag: 84995
  - 17
    - how to drag and change datagrid's column? Hi I have my own datagrid for WinForms extended and added some functionality over the normal datagrid. I want users to be able to drag the columns and change its position. For example, drag the 4th column and put it as the 2nd column. Am not sure how to do this. Can anybody give me some hints? rgds KK Tag: Combo box drop down Tag: 84989
  - 18
    - One More Context Menu Question This is a multi-part message in MIME format. ------=_NextPart_000_0048_01C523D0.3007E280 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I want to add a separator bar between sections of the right mouse menu. I want the bar to be horizontal to separate a vertical group of menu = items. I've tried the few methods and combinations thereof but can only create = a column separator bar which at the moment I do not want. ie. Function 1 Function 2 Function 3 Function 4 Function 5 Function 6 Function 7 Any and all help would be appreciated... ------=_NextPart_000_0048_01C523D0.3007E280 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 6.00.2800.1491" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>I want to add a separator bar between = sections of=20 the right mouse menu.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I want the bar to be horizontal to = separate a=20 vertical group of menu items.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I've tried the few methods and = combinations thereof=20 but can only create a column separator bar which</FONT></DIV> <DIV><FONT face=3DArial size=3D2>at the moment I do not = want.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>ie.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2> Function 1</FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 2</FONT></DIV> <DIV><FONT face=3DArial size=3D2><U> Function 3</U></FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 4</FONT></DIV> <DIV><FONT face=3DArial size=3D2><U> Function 5</U></FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 6</FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 7</FONT></DIV> <DIV><U><FONT face=3DArial size=3D2></FONT></U> </DIV> <DIV><FONT face=3DArial size=3D2>Any and all help would be=20 appreciated...</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV></BODY></HTML> ------=_NextPart_000_0048_01C523D0.3007E280-- Tag: Combo box drop down Tag: 84987
  - 19
    - Casting classes I want to be sure I understand the rules when casting classes and sub-classes. If I have a class Person and a sub-class Employee that inherits person, then This is not allowed. Why? dim person1 as new person dim emp1 as employee emp1 = person1 But this is. Why? dim person1 as person dim emp1 as new employee person1 = emp1 TIA John Tag: Combo box drop down Tag: 84986
  - 20
    - TabControl and Data binding I've read elsewhere that databound controls on a tab are not actually bound to the datasource until the tab is made visible. I have an IsDirty flag that gets set in the TextChanged, CheckedChanged, etc, events on each of the controls and I'm setting up these event handlers in the form's load event. How can I avoid these events getting called whenever I change from one page to another? Or better yet, is there another event I could use to set the IsDirty flag? I tried the RowChanged event on the underlying DataTable but it wasn't firing. Tag: Combo box drop down Tag: 84985
  - 21
    - Adding to an existing MenuItem's MenuItem Collection Dynamically This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C523C2.6C8F85E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have a static ContextMenu already built and it works. =20 I am trying to add a submenu (right arrow with a new menuitem list) = dynamically when the popup is created. The new set of menuitems requires some DB queries to be done and then = the menuitems to be added to the Menuitems collection of an existing = menuitem This operation is sensitive to the record that the user has right = clicked, so this dynamic sublist of actions can be different each time = the user right clicks. However while I get the context menu every time the user right clicks, = the dynamically generated submenu only displays once per execution of = the application. Someone must have done this before.....Please Help.....Frustrated.. I have tried to clear the menuitems for the dynamic menuitems collection = on the dispose of the popup event, but dispose is not called and there = is not an event that tells me when this menu is no longer displayed. argghhkd#&#&#&# ------=_NextPart_000_0008_01C523C2.6C8F85E0 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 6.00.2800.1491" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>I have a static ContextMenu already = built and it=20 works.  </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I am trying to add a submenu (right = arrow with a=20 new menuitem list) dynamically when the popup is created.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>The new set of menuitems requires some = DB queries=20 to be done and then the menuitems to be added to the Menuitems = collection of an=20 existing menuitem</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>This operation is sensitive to the = record that the=20 user has right clicked, so this dynamic sublist of actions can be = different each=20 time the user right clicks.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>However while I get the context menu = every time the=20 user right clicks, the dynamically generated submenu only displays once = per=20 execution of the application.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Someone must have done this = before.....Please=20 Help.....Frustrated..</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I have tried to clear the menuitems for = the dynamic=20 menuitems collection on the dispose of the popup event, but dispose is = not=20 called and there is not an event that tells me when this menu is no = longer=20 displayed.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial = size=3D2>argghhkd#&#&#&#</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV></BODY></HTML> ------=_NextPart_000_0008_01C523C2.6C8F85E0-- Tag: Combo box drop down Tag: 84980
  - 22
    - what event is raised? What event is raised when you click on the upper part of a form?(the one with the control box and title...) because it doesn't respond to MouseDown or Click events (they are only raised when I click on the rest of the form). Thank you! Tag: Combo box drop down Tag: 84974
  - 23
    - trying to use System::Drawing I am having difficulty using System::Drawing. I am writing the following in formDlg.h #using <mscorlib #using namespace System How do I include the namespace in my formDlg.h to be able to use System::Drawing without gettignthe errors c2006- expected a filename, found a namespace & c1190-managed target code requires a '#using<mscorlib> and '/clr' option -- davebh - programmer Tag: Combo box drop down Tag: 84972
  - 24
    - Need help in Data grid Hi I am developing a windows application. This contains a Data grid which will populate data from a data table in a Dataset. The application will do some calculation and store the result in the Data table. After the calculation, the result stored in the data table will display in the data grid. When number of rows need to populate in the data table after calculation is around 16000, application will take around 30 seconds to do the whole work. Because of this Data grid population from data table will also take 30 seconds or more. During these 30+ seconds, form will be blank and user cannot do any activity. I like to know, Is there any way to display the calculated rows part by part to the data grid from data table. (Like Buffer.Flush in Asp.net, to display part of the out put to the user). If I am able to display 1000 rows after calculation from data table to the data grid, the user no need to wait for whole calculation to be completed for the out put Give me some reply on this. Thanks in Advance. Umesh Tag: Combo box drop down Tag: 84968
  - 25
    - setting the formatted text for a RichTextBox control Hi, I was wondering if there is a possibility to update the content of a RichTextBox control with a mixture of formatted text (for example bold or underline) containing in one action. I would like to speed things up and use a StringBuilder to store the text and its formatting instead of doing a lot of string concatenations using the SelectedText property. Any ideas? Thanks in advance, Ohad Tag: Combo box drop down Tag: 84967

I am sure this has been asked a million times, but I have Googled
until I am blue in the face...so Iam asking again...

How can I make a combox drop down automatically when it receives
focus?

TIA
John

Top

Re: Combo box drop down by Herfried

Herfried
Thu Mar 10 18:28:25 CST 2005

"J L" <john@marymonte.com> schrieb:
> How can I make a combox drop down automatically when it receives
> focus?

Set the combobox' 'DroppedDown' property to 'True' in its 'Enter' or
'GotFocus' event handler.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

Top