DataGrid: Update datasource when closing form

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  - 1
    - ActiveX controls causing multiple calls to UserControl's OnLoad If I host ActiveX controls on a UserControl, the designer inserts calls to the controls' EndInit methods into the UserControl's InitializeComponent method. Every time EndInit is called (once for each ActiveX control), the containing UserControl's OnLoad method is called. Is this by design? If so, how am I supposed to deal with it? If I host the same controls on a Form, the Form's OnLoad is only called once, even though EndInit is called for each control. I posted about this a few days ago; still puzzling over it. http://groups-beta.google.com/group/microsoft.public.dotnet.framework.windowsforms/messages/3e6859dfbd8a4ecb,e2b3a9fdc23b41ec,73c8eafc4da4abb9?thread_id=8fcf88093bfceaf6&mode=thread&noheader=1&q=OnLoad+UserControl#doc_3e6859dfbd8a4ecb Tag: DataGrid: Update datasource when closing form Tag: 87069
  - 2
    - major challenge : strange problem with drag&drop of Outlook2003 msg to vb.net form Hi, I'm desperatly trying to find how I can use drag and drop for an Outlook 2003 msg towards a VB.Net Windows application. Normally you should use Dim theSteam As Stream = CType(e.Data.GetData("FileGroupDescriptor", True), Stream) to capture the filename (which works great) and use Dim ms As MemoryStream = CType(e.Data.GetData("FileContents", True), MemoryStream) which returns nothing. The strange thing is that e.Data.GetDataPresent("FileContents") returns true. I also tried to copy an msg file to the clipboard and tried to download the message from the clipboard into my vb.net application but same behaviour. I also tested the same thing in c# but no changes. Can someone please advice what's wrong ? Is this a bug gentlemen from Microsoft ??? Thx for some feedback !!! Tag: DataGrid: Update datasource when closing form Tag: 87068
  - 3
    - NUnit, NMock and DataBinding Hi all, Can anyone share their experiences (at a high level) mocking a database that fills a Dataset that is bound to controls in a UI? I'm finding the task rather daunting. Cheers, WNC Tag: DataGrid: Update datasource when closing form Tag: 87063
  - 4
    - databinding issue Hi, I've got the following problem with databinding: If I bind a column of a dataset e.g. on the Text property of a Textbox, everything acts as expected, i.e. if you don't make any changes to the text in the textbox, the rowstate of the bound row stays unchanged. On the contrary, when you bind e.g. the Tag property of the Textbox, instead of the text property, the rowstate turns to modified when leaving the textbox (or by calling the bindingmanager.endcurrentedit method), even if you haven't changed a thing. This is very inconveniant because it causes unnecessary updates of the database. It seems that binding on the non default property (which is Text) causes changes of the underlying dataset. I assume it has somtehing to do with adding attributes to the properties ? or not ? How can we avoid this ??? Thanks !!! Tag: DataGrid: Update datasource when closing form Tag: 87062
  - 5
    - How to close a form in C# I'm trying to close a form in C#. I have a vb background, so the question may sound dumb. In vb it is just me.close(). I've tried a bunch of ways to close the form but C# is acting pretty dumb also. I can't find a way to close it. Here are some of the things I've tried: private void button1_Click(object sender, System.EventArgs e) { // Form1 frmI = new Form1(); // DialogResult dr = frmI.ShowDialog(); Form1.Quit(); // this.Hide(); } The new form seems to recreate the form - that is a total nightmare. Hide doesn't end the program and Close just gets a message that says close is not defined. -- Regards, Jamie Tag: DataGrid: Update datasource when closing form Tag: 87049
  - 6
    - Several bugs and workarounds In the course of writing my application, I have come across several = issues that seem to be Microsoft bugs. Following is a summary and possible workarounds. Jeffrey Tan, if you are reading this, please verify. Also, I'd like to know how to request fixes for these issues. 1) Sometimes the designer decides to spontaneously rearrange the tabs in = a TabControl. Status: Verified "known issue" - "Tab control TabPage order is = randomized" Workaround #1, suggested by Herfried K. Wagner Make sure you have always the first tab selected when recompiling Workaround #2: Delete and recreate the tabs after the call to = InitializeComponent() // Sample pages =3D new TabPage[] { pageOne, pageTwo, pageThree, pageFour, = pageFive }; myTabControl.Controls.Clear(); myTabControl.Controls.AddRange(pages); 2) BeginUpdate/EndUpdate does not work correctly when adding a single = item to a sorted ListBox Status: Verified "known issue" Workaround #1: Check the number of items to update and only perform = BeginUpdate/EndUpdate if >1. if (items.Count > 1) myList.BeginUpdate(); myList.Items.AddRange(items); if (items.Count > 1) myList.EndUpdate(); Workaround #2: Toggle the Sorted property. // Sample myList.BeginUpdate(); bool bug_workaround =3D myList.Sorted; myList.Sorted =3D false; myList.Items.AddRange(items); myList.Sorted =3D bug_workaround; myList.EndUpdate(); 3) A DataGrid leaves text on the screen after deleting a row containing = a selected (highlighted) cell. Happens when the columns are set to read-only, mostly visible when = deleting the last row. Status: Verified "known issue" Workaround: Set the read-only property of the whole DataGrid to true and = the read-only properties of the individual DataGridTextBoxColumn items to false. Don't know about cases when only some columns need to be read-only. 4) A DataGrid on a TabPage loses the data binding if the is deleted from = the TabControl. Since the only way to hide tab pages is to remove them, it is relevant. Status: Happens on my machine... Workaround: un-bind and re-bind the DataGrid when removing & re-adding = the tab page. Those are the bugs that I encountered. If you know of more, please post. --=20 Address email to user "response" at domain "alexoren" with suffix "com" Tag: DataGrid: Update datasource when closing form Tag: 87044
  - 7
    - ANN: Dialog Workshop .NET 1.4.1 released Hello, Dialog Workshop .NET ver. 1.4.1 released! Using Dialog Workshop components you can speed up the creation of customized standard dialogs (based on the Windows Common dialogs) in your .NET applications without using WinAPI and resource editors! Many really powerful features are available: - extend your dialogs using your WinForms without writing a line of code; - custom dialog items captions; - customized dialog startup position; - custom file list view styles, etc. in Open/Save dialogs; - OpenFile dialog with MRU files tab; - design-time support, etc. Also Dialog Workshop for VCL.NET (Delphi.NET) is available now. Please visit our homepage for details: http://www.componentage.com Sergey Novogilov COMPONENTAGE Software http://www.componentage.com Tag: DataGrid: Update datasource when closing form Tag: 87039
  - 8
    - Creating a scrollable container control I would like to create a custom container control which can scroll its child controls. I know that the AutoScroll property of ScrollableControl can mimic this functionality, but AutoScroll causes some behavior which is EXTREMELY obnoxious to my users, and I haven't been able to find a workaround. Consequently, I would like to be able to scroll a control without using the AutoScroll property. Is there any way to accomplish this? I've created the appropriate scrollbars, and now I just need to get the child controls to move. The SetDisplayRectLocation() function sounded like exactly what I needed, but it doesn't seem to work unless AutoScroll is enabled. Tag: DataGrid: Update datasource when closing form Tag: 87033
  - 9
    - Windows Form in Shared Add-in not reading App.config settings Good Morning, I am developing an Outlook Shared Add-in using VB.Net. A Windows form has been added to the project, but is not reading the values in the app.config file during testing. The code (Sub Main) is below and displays "Blank connection string" is the label. It is called by an Outlook command button click event: Private Sub btnCTXNotesHistory_Click(ByVal Ctrl As Microsoft.Office.Core.CommandBarButton, ByRef CancelDefault As Boolean) Handles btnCTXNotesHistory.Click Dim frmNotesHistory As New frmCTXNotesHistory frmNotesHistory.Main() frmNotesHistory.Show() End Sub Sub Main() Dim sqlconCTXControl As New SqlClient.SqlConnection sqlconCTXControl.ConnectionString = ConfigurationSettings.AppSettings("sqlconCTXControl.ConnectionString") lblErrorMsg.Text = sqlconCTXControl.ConnectionString.ToString If lblErrorMsg.Text.Length = 0 Then lblErrorMsg.Text = "Blank connection string" End If End Sub Thanks. Tag: DataGrid: Update datasource when closing form Tag: 87031
  - 10
    - InvalidCastException: (DataSet) DataGrid.DataSource I need some help please. Say you have a DataGrid and a DataSet, and you create a dataview to handle sorting and filtering and then you assign the dataview to DataGrid.DataSource. Once you did that you will get InvalidCastException if you do this: DataSet dataSet = (DataSet) dataGrid.DataSource; But I need to do that because I need to get the DataGrid's dataentries in a dataset and use XmlDataDocument to load the dataset and then write it to an xml file. Maybe my first design decision to assign dataview to the datasource should be reviewed. I don't know. Any comment will really help. Thank you. Tag: DataGrid: Update datasource when closing form Tag: 87030
  - 11
    - Transparent UserControl I'm going Mad! Has anyone been able to give a UserControl a transparent Background I've tried... this.SetStyle(ControlStyles.SupportsTransparentBackColor, true); this.BackColor = Color.Transparent; this.UpdateStyles(); ... but it does not work. Tag: DataGrid: Update datasource when closing form Tag: 87027
  - 12
    - Changing grid cells programatically I have a DataGrid and I'm changing the value in one of the cells programatically. Problem is, my change isn't being picked up (and saved in the underlying data source), unless I manually tab off the cell in the grid. I've tried calling BeginEdit and EndEdit around the code that populates the cell, to no avail. What am I missing? Tag: DataGrid: Update datasource when closing form Tag: 87023
  - 13
    - TLSStream object problem I have an application that needs to send a HttpWebRequest to a secure server via https on a non-standard SSL port, I need to use port 5004. The error I get an the stack is shown below. The code works fine using the standard SSL port, but fails using port 5004, not a firewall issue. ERROR: Cannot access a disposed object named "System.Net.TlsStream". Object name: "System.Net.TlsStream". at System.Net.TlsStream.InnerWrite(Boolean async, Byte[] buffer, Int32 offset, Int32 size, AsyncCallback asyncCallback, Object asyncState) at System.Net.TlsStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback asyncCallback, Object asyncState) at System.Net.Connection.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state) at System.Net.ConnectStream.BeginWrite(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state) at System.Net.ConnectStream.Write(Byte[] buffer, Int32 offset, Int32 size) Code: Errors out on the Poststream.Write line of code. Is there any way to Overload the webrequest object to force it to see the certificate. In debugging I am apply to query the certificate object and have not problem viewing its properties. Any and all help would be greatly appreciated. Thanks. Private Sub btnTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTest.Click Dim TransactionString As String = "" Dim Response As String = "" Dim VitalUri As New Uri("https://ssltest.tnsi.com:5004/") Dim RequestUri As New Uri(VitalUri, "test.php") Dim WRequest As HttpWebRequest 'For quick Connectivity Test use this abbreviated test record TransactionString = "D4.999995" & Chr(3) Dim LRC As String = LongitudinalRedundancyCheck(TransactionString) 'Dim htmlrequest As New HTMLRequest 'Response = htmlrequest.getRequest(requestUri, Chr(2) & TransactionString & LRC, "x-Visa-II/x-auth") Try ServicePointManager.CertificatePolicy = New TrustAllCertificatePolicy WRequest = CType(WebRequest.Create(RequestUri), HttpWebRequest) WRequest.Method = "POST" WRequest.ContentType = "x-Visa-II/x-auth" WRequest.ContentLength = TransactionString.Length + 2 'convert the transaction string to a Stream object Dim byteArray As Byte() = Encoding.UTF8.GetBytes(Chr(2) & TransactionString & LRC) Dim Poststream As Stream = WRequest.GetRequestStream Dim bob As String = WRequest.ServicePoint.Certificate.GetRawCertDataString Poststream.Write(byteArray, 0, TransactionString.Length + 2) Poststream.Close() 'assign the response object of WRequest to a WebResponse variable Dim WResponse As WebResponse = WRequest.GetResponse Dim ResponseStream As Stream = WResponse.GetResponseStream Dim StreamReader As New StreamReader(ResponseStream) Response = StreamReader.ReadToEnd ResponseStream.Close() StreamReader.Close() WResponse.Close() Catch ex As Exception Response = "ERROR: " & ex.Message & vbNewLine & ex.StackTrace End Try Me.txtResponse.Text = Response End Sub Private Function LongitudinalRedundancyCheck(ByVal Message As String) As String Dim sLRC As String = "" Dim iXor As Integer = 0 Dim Value1 As Integer = 0 Dim Value2 As Integer = 0 Dim Position As Integer = 0 Try If Message.Length >= 2 Then Value1 = Asc(Message.Substring(0, 1)) Value2 = Asc(Message.Substring(1, 1)) iXor = Value1 Xor Value2 Position = 1 Do While Position < Message.Length - 1 Position = Position + 1 Value1 = iXor Value2 = Asc(Message.Substring(Position, 1)) iXor = Value1 Xor Value2 Loop sLRC = Chr(iXor) Else sLRC = Message End If Catch ex As Exception sLRC = "" End Try Return sLRC End Function End Class Public Class TrustAllCertificatePolicy Implements System.Net.ICertificatePolicy Public Function CheckValidationResult(ByVal srvPoint As System.Net.ServicePoint, ByVal certificate As System.Security.Cryptography.X509Certificates.X509Certificate, ByVal request As System.Net.WebRequest, ByVal certificateProblem As Integer) As Boolean Implements System.Net.ICertificatePolicy.CheckValidationResult Return True End Function End Class Public Class RequestState Public request As HttpWebRequest Public requestDocument As String Public Sub New() request = Nothing requestDocument = "" End Sub End Class Public Class HTMLRequest 'Handler to synchronize with main thread Private allDone As New ManualResetEvent(False) Private _requestDocument As String Private _responseDocument As String Private _web As HttpWebRequest Private Sub ReadCallback(ByVal asynchronousResult As IAsyncResult) Dim result As String = "" Try 'get the information to pass on from the Async Object Dim myRequestState As RequestState = CType(asynchronousResult.AsyncState, RequestState) Dim myWebRequest2 As HttpWebRequest = CType(myRequestState.request, HttpWebRequest) Dim requestDocument As String = myRequestState.requestDocument 'get the stream to write the request to Dim streamResponse As Stream = myWebRequest2.EndGetRequestStream(asynchronousResult) Dim bytArray() As Byte = System.Text.Encoding.ASCII.GetBytes(requestDocument) streamResponse.Write(bytArray, 0, requestDocument.Length) streamResponse.Close() 'tell the main thread that writing stream is complete allDone.Set() Catch e As WebException result = e.Message Catch ex As Exception result = "Error: " & ex.Message allDone.Set() End Try End Sub Private Sub retrieve() Try Dim objWebResponse As WebResponse = _web.GetResponse Dim objStream As StreamReader objStream = New StreamReader(objWebResponse.GetResponseStream, System.Text.ASCIIEncoding.ASCII) _responseDocument = objStream.ReadToEnd 'close the objects objWebResponse.Close() objStream.Close() Catch ex As Exception _responseDocument = "ERROR retrieve: " & ex.Message End Try End Sub Private Sub send() Try 'Prepare objects to pass int async call Dim myRequestState As New RequestState myRequestState.request = _web myRequestState.requestDocument = _requestDocument Dim r As IAsyncResult = CType(_web.BeginGetRequestStream(AddressOf ReadCallback, myRequestState), IAsyncResult) 'wait till asychro is done allDone.WaitOne() Catch ex As Exception End Try End Sub Public Function getRequest(ByVal requestUri As Uri, ByVal requestText As String, ByVal sContentType As String) As String ServicePointManager.CertificatePolicy = New TrustAllCertificatePolicy _requestDocument = requestText _web = CType(WebRequest.Create(requestUri), HttpWebRequest) With _web .ContentType = sContentType .Method = "POST" .KeepAlive = False .ContentLength = requestText.Length .Timeout = 10000 End With Try send() retrieve() Return _responseDocument Catch ex As Exception Return "ERROR getRequest: " & ex.Message End Try End Function End Class Tag: DataGrid: Update datasource when closing form Tag: 87022
  - 14
    - DataGrid: Custom ComboBox column problem Hay there, I'm writing my own DataGridComboBoxColumn because .NET 1.1 does not have one (I hope .NET 2.0 supplies one). I based it on this article: http://msdn.microsoft.com/msdnmag/issues/03/08/DataGrids/default.aspx I have a problem when there are two DataGrid's on one form, and when I switch focus from one grid to the other. To be more precise, when I'm editing a combo box column in one grid, and then click in the combo column of another grid an exception is thrown stating "The ListManager's position must be equal to rowNum. Parameter name: rowNum". I will post the code if anyone feels like digging into it. Anyway, perhaps someone has a better link with a how-to? Notes about the code: * The only thing that the PropertyEditorTable is used for in this context is for setting the DataSource of the ComboBox that edits the value. * The exception occurs when executing SetColumnValueAtRow in the comboBox_Leave event handler internal class PropertyComboBoxColumn : DataGridTextBoxColumn { protected PropertyEditorTable pe; private ComboBox comboBox; private CurrencyManager cm; private int iCurrentRow; public ComboBox ComboBox { get { return comboBox; } } public PropertyComboBoxColumn( PropertyEditorTable pe ) { this.pe = pe; this.cm = null; this.comboBox = new ComboBox(); this.comboBox.DropDownStyle = ComboBoxStyle.DropDown; this.comboBox.Leave += new EventHandler( comboBox_Leave ); } protected override void Edit ( CurrencyManager source, int rowNum, Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible ) { base.Edit( source, rowNum, bounds, readOnly, instantText, cellIsVisible ); if( !readOnly && cellIsVisible ) { iCurrentRow = rowNum; cm = source; DataGridTableStyle.DataGrid.Scroll += new EventHandler( DataGrid_Scroll ); comboBox.Parent = TextBox.Parent; comboBox.Location = DataGridTableStyle.DataGrid.GetCurrentCellBounds().Location; comboBox.Size = new Size( TextBox.Size.Width, comboBox.Size.Height ); pe.SetDataSourceForPropertyCombo( rowNum, source, comboBox ); int foundIndex = comboBox.FindStringExact( TextBox.Text ); if( foundIndex == -1 ) comboBox.Text = TextBox.Text; else comboBox.SelectedIndex = foundIndex; comboBox.Show(); comboBox.BringToFront(); comboBox.Focus(); } } private void DataGrid_Scroll(object sender, EventArgs e) { comboBox.Hide(); } private void comboBox_Leave( object sender, EventArgs e ) { SetColumnValueAtRow( cm, iCurrentRow, comboBox.Text ); Invalidate(); comboBox.Hide(); DataGridTableStyle.DataGrid.Scroll -= new EventHandler( DataGrid_Scroll ); } } Thanks, -- Tom Tempelaere Tag: DataGrid: Update datasource when closing form Tag: 87018
  - 15
    - Data Grid: Adding new Rows Hi There is a databound grid that is being used in one of my Master - Detail form there I need to keep two columns hidden and assign Autogenerated values once a user adds a new record through the grid. can somebody please tell me how to do this; as i couldn't find a single event that is fired once a new row is added to the grid; and also i have tried quite a bit of fruite less methods like medling with the data source etc. can somebody please help me on this. thankx in advance Tag: DataGrid: Update datasource when closing form Tag: 87010
  - 16
    - Want to check condition before switching between child forms In My MDI Application (One Mdi Parent and around 50 mdi child forms). On each child form is a database driven form, it means user can add,update etc. record in the database. i want to check certain condition before switching between mdi child forms, if condition is true then user should be allowed to move another mdi child form otherwise not. Steps to duplicate. 1. Open first child form1 2. Open second child form2 3. Press add child form2 4. now user tries to move on form1, and i want to validate (if operation is complete : Want to complete) if yes then focus should not be moved to form1 else it should be move to form1 I was able to acheive this in vb6 but not in vb.net , can you please suggest which event should i use? i tried with leave,enter and validating but could succeed. Dharmesh Parekh Tag: DataGrid: Update datasource when closing form Tag: 87009
  - 17
    - changing a data type for a field on a report, using VS 2K3 and CR Hello, I have an app that uses Crystal Reports for .Net. I needed to change a data type of a field in the database and on the report. I thought it would work fine, however now the field is always blank on the report. The field is actually a fomula field based on a Date/Time datatype. I am assuming that because the field is no longer a Date/Time datatype in the database that this showing up blank. Does anyone know how to reslove this type of issue? Also does anyone know of any good books/reference material for using Crystal Reports bundled within .Net? Thanks, Chris Tag: DataGrid: Update datasource when closing form Tag: 87008
  - 18
    - Interactive tooltips I want to extend the tooltip control to handle interactions with the user via clickable links within the text. It should work a bit like this example : http://www.dyn-web.com/dhtml/tooltips/hover-tip.html but of course I want this in windows forms not ASP.NET. Any guidance anybody ? Can it be done ? Tag: DataGrid: Update datasource when closing form Tag: 87005
  - 19
    - ToolTip question How do I make a tooltip remain visible until the user moves the mouse ? Currently it stays visible for a few seconds and then disappears. Tag: DataGrid: Update datasource when closing form Tag: 87003
  - 20
    - The object is currently in use elsewhere I have a splash screen that is displayed as the application starts. The splash screen has text dynamically added to it to indicate the authorisation mechanism and start-up progress. Due to the nature of the splash screen graphic we have to draw the text onto the splash screen instead of assigning text directly to each labels text property. Internittently, one of our XP Pro SP2 test machines gets the following error when displaying the splash screen that displays itself in a .NET Framework invoked dialog: Exception of type 'System.InvalidOperationException' The object is currently in use elsewhere. Stack Trace: at System.Drawing.TextureBrush..ctor(Image image, WrapMode wrapMode) at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent) at System.Windows.Forms.Control.InvokePaintBackground(Control c, PaintEventArgs e) at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent) at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs) at System.Windows.Forms.Control.WmPaint(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Label.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 splash screen invokes itself on a separate thread via its ShowSplash method: /// <summary> /// Initializes and shows a new <see cref="SplashForm"/>. /// </summary> /// <param name="localisedApplicationName">The localised application name.</param> /// <param name="versionedAssembly">An <see cref="Assembly"/> from which version information can be extracted.</param> /// <param name="localisedCopyright1">A first line of copyright message.</param> /// <param name="localisedCopyright2">A second line of copyright message.</param> /// <param name="localisedSplashBackdropImage">The splash backdrop image.</param> public static SplashForm ShowSplash( string localisedApplicationName, Assembly versionedAssembly, string localisedCopyright1, string localisedCopyright2, Image localisedSplashBackdropImage ) { const string THREAD_NAME = "SplashScreen"; sShownInstance = new SplashForm( localisedApplicationName, versionedAssembly, localisedCopyright1, localisedCopyright2, localisedSplashBackdropImage ); // Create the thread and start it; when the instance is // closed, this thread will stop automatically... sThread = new Thread(new ThreadStart( DoSplashScreen ) ); sThread.Name = THREAD_NAME; sThread.Start(); // Return the shown instance return sShownInstance; } The label's paint event calls DrawSmearedText: private void lblNotice_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { DrawSmearedString( mNotice, lblNotice, Brushes.SteelBlue, Brushes.Red, e ); } private void lblBuildNumberAndDate_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { DrawSmearedString( BuildNumberAndDate, lblBuildNumberAndDate, Brushes.White, Brushes.Red, e); } private void lblPrerelease_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { DrawSmearedString( mPrerelease, lblBuildNumberAndDate, Brushes.White, Brushes.Red, e); } private void lblProgress_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { using ( SolidBrush smearBrush = new SolidBrush( Color.FromArgb( 64, 255, 255, 255 ) ) ) using ( SolidBrush textBrush = new SolidBrush( lblProgress.ForeColor ) ) { DrawSmearedString( mProgress, lblProgress, smearBrush, textBrush, e ); } } The DrawSmearedString method is as follows: private static void DrawSmearedString( string text, System.Windows.Forms.Label label, System.Drawing.Brush smearColour, System.Drawing.Brush overwriteColour, System.Windows.Forms.PaintEventArgs e) { // Our background colour changes from light to dark, so we can't draw // a single text colour across it. So, we do some shadow drawing by // smearing the text around in one colour, and then overwriting it in another. if ( text != null && text.Length > 0 ) { const int OFFSET = 2; for ( int x = 0; x <= OFFSET; x++ ) { for ( int y = 0; y <= OFFSET; y++ ) { // Assume the label has more than one row and create an offset rectangle on which to draw the smeared text RectangleF drawRect = new RectangleF( x, y, label.Width, label.Height); e.Graphics.DrawString( text, label.Font, smearColour, drawRect ); } } e.Graphics.DrawString( text, label.Font, overwriteColour, label.ClientRectangle ); } } I have managed to produce this error once on a W2K machine but not when using VS 2003 IDE. We are using .NET Framework v1.1 with appropriate service packs applied. Any ideas? Regards, Ian Rowland Tag: DataGrid: Update datasource when closing form Tag: 87002
  - 21
    - NotifyIcon and Minimize Hello, I have a form with a notifyicon. I have set ShowInTaskbar to false. When I minimize the form, the form minimize, but there is a symbol on the windows desktop for the minimized form. This symbol is the same as for child windows which are minimized to its mdi-form. What I make wrong. Thanks Albert Krüger Tag: DataGrid: Update datasource when closing form Tag: 87001
  - 22
    - How to give initial focus? Hi, I've programmed a simple form having some panes and one button. There is a basic thing I can't find a solution for: 1) I gave the button a TabIndex of 0. The main pane has a TabIndex of 1. Still the button doesn't get the focus when the form opens. Why? I tried to give focus to the button at Form_Load(), but CanFocus is false at that time. TIA, Axel Dahmen Tag: DataGrid: Update datasource when closing form Tag: 87000
  - 23
    - How to set Form.Height > screen height? I have a irregular form having height > 600 pixel which can be moved when any part of it is clicked and dragged. Under resolution 800 x 600, the form will appear "truncated" when i move it upward... Later I found that the Height property will be automatically set to a number slightly larger than screen height (probably screen height + title height, sth like that) whenever a set a large value to it. Is there any way i can keep a large Height even under low resolution? Thanks!! Tag: DataGrid: Update datasource when closing form Tag: 86997
  - 24
    - Need good design for startup project I'm building a winforms app using vb.net 1.1 and have 3 basic tiers on the client side. the UI, BLL and DAL. Currently everything is in one project and at some point I'll parse it out to a separate project for each Tier. Currently the startup object is Sub Main in the form called frmMain. frmMain is open through the life of the application session. What happens is from Sub Main it runs this code to get things started correctly: Shared Sub Main() Try System.Windows.Forms.Application.EnableVisualStyles() System.Windows.Forms.Application.DoEvents() System.Windows.Forms.Application.Run(New frmMain) Catch ex As Exception ErrLog(ex) End Try End Sub Then the Load event opens the login form before frmMain has a chance to be visible. If the login succeeds, then frmMain continues to open. If the login is canceled, then frmMain exits and the application quits. ============================ What I want to do is parse the login form into a new project and make that the startup project. Then as the user logs in it can check for updates and more easily replace any of the other DLLs (UI, BLL or DAL) with out having to replace its self (if I left the login form as part of the UI exe then I think it would be more difficult to upgrade the UI exe as it would have to replace itself.). I know there are new things coming available like no touch deployment, but I'm thinking that this design will still make things easier down the road when I use a better technology for automatic updates. So my question is: Can anyone give some advise on this strategy and; if frmMain is in the UI dll rather than being in the startup project, how can I make the login form go away and have frmMain persist as the main form through out the application session? Thanks. -- moondaddy@nospam.nospam Tag: DataGrid: Update datasource when closing form Tag: 86992
  - 25
    - Could not deactivate CTRL+F4(close window) Despite setting controlbox property to false, CTRL+F4 shortcut is still working. Anyone can help me to disable CTRL+F4? Raj kumar Tag: DataGrid: Update datasource when closing form Tag: 86990
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    - How to use c# creat dns server zone ? HI I try it code only creat DNS ResourceRecord,How to creat dns zone? thanks! this code: public void CreateRR(string zoneName, string rrTextRep) { if ( zoneName == null ) throw new ArgumentNullException("zoneName", "zoneName is null."); if ( rrTextRep == null ) throw new ArgumentNullException("rrTextRep", "rrTextRep is null."); InvokeMethodOptions options = new InvokeMethodOptions(); options.Timeout = new TimeSpan(0,0,0,5); ManagementClass rrClass = new ManagementClass(@"\\"+ System.Environment.MachineName +@"\root\MicrosoftDNS","MicrosoftDNS_ResourceRecord",null); //Get an input parameters object for this method ManagementBaseObject inParams = rrClass.GetMethodParameters("CreateInstanceFromTextRepresentation"); //Fill in input parameter values inParams["DnsServerName"] = null; //Don't need. inParams["ContainerName"] = zoneName; inParams["TextRepresentation"] = rrTextRep; //Execute the method try { ManagementBaseObject outObject = rrClass.InvokeMethod ("CreateInstanceFromTextRepresentation", inParams, null); PropertyDataCollection outProperties = outObject.Properties; foreach (PropertyData outProperty in outProperties) { Console.WriteLine("Property = " + outProperty.Name); } } catch { throw new ApplicationException ("CreateInstanceFromTextRepresentationmethod failed."); } } // End CreateInstanceFromTextRepresentation Method. Tag: DataGrid: Update datasource when closing form Tag: 86983
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    - Opening a Word Document Hello, I have an application that opens a word document like so: With WrdApp .Documents.Open(System.Windows.Forms.Application.StartupPath + "\Template.doc", missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing) .Selection.Paste() .Visible = True .Activate() End With This works great but when I close word the application says This file is in use by aother application or user. (.......\Normal.dot) When I click OK I get a "Save As" Dialog Box that wants me to save the normal.dot When I click CANCEL and try to exit Word the following message is displayed: Changes have been made that affect the global template, Normal.dot. Do you wnat to save those changes? How do I make this stop doing this. I just want to open a document from a .NET application. Thanks, Chuck Tag: DataGrid: Update datasource when closing form Tag: 86980
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    - Simple question: Updating a datasource This might be a simple question, but I havent found a solution anywhere: I do some stuff, and fill a DataSet from a database. After the tables have been processed (rows inserted/deleted/updated) I want to write the DataSet back to the database. My DataTable shall replace the table in the database. Consider the original DataAdapter disposed. My current workaround is to create a new DataAdapter and new DataSet, fill the new DataSet as I did from the start, replace ALL table rows with the rows from the first table, and finally call the Update() method to write back the changes. This strikes me as not the proper way to do things. I don't see the point in retrieving all rows from the database if all I want to do is overwrite the table. Can't I create a new DataAdapter and simply tell it to update the target table with my DataTable? Secondly, how do I insert a single row into the target Table? Is the proper way to write an SQL command and put it in an OleDbCommand object? Thanks! - Peder - Tag: DataGrid: Update datasource when closing form Tag: 86979
  - 4
    - About Trim What is the best practice Trim (myStringvar) or myStringvar.Trim thks Tag: DataGrid: Update datasource when closing form Tag: 86978
  - 5
    - Can't exit Windows after removing a control from a form This problem occurs on Windows 2000 but NOT on Windows XP: If you programmatically remove a control from the Controls collection of a panel on another form, then that form's default WndProc will return FALSE to the WM_QUERYENDSESSION message! Is there anything that can be done to fix this other than overriding the WndProc (which I don't want to do for performance reasons)? Please help! To reproduce: (on Win 2000 obviously) VS.Net 2003, Framework 1.1 w/ service packs: In VS.Net, create a C# win forms application with two Forms (e.g. Form1 and Form2): On Form1, drop two buttons. On Form2, drop a panel, drop a button inside the panel. In Form2 code, make panel1 be public. In Form1, add a Form2 private variable (e.g. call it "form2"), then write the first button's click handler: if (this.form2 == null) this.form2 = new Form2(); this.form2.Show(); The second button's click handler: this.form2.panel1.Controls.RemoveAt(0); Then run it... click the first button, click the second button. You should see the button disappear from the panel of form2. Then try to exit Windows (or, a bit nicer, write something to FindWindow of the Form2 window and send it WM_QUERYENDSESSION). Thanks!, Greg Patrick Tag: DataGrid: Update datasource when closing form Tag: 86975
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    - Reflection Hi, In order to display multiple lines in a column, i am creating creating a new column style deriving from the DataGridTextBoxColumn. To get the height of each row i am using the following code in one of the methods of this custom columnstyle class. MethodInfo mi = t.GetMethod("get_DataGridRows",BindingFlags.FlattenHierarchy | BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static); DataGrid dg = this.DataGridTableStyle.DataGrid; Array dgRowArray = (Array)(mi.Invoke(dg,null)); Heights = new ArrayList(); foreach (object dgRowHeight in dgRowArray) { if (dgRowHeight.ToString().EndsWith("DataGridRelationshipRow") == true) { Heights.Add(dgRowHeight); } } The above code works perfectly if use this column style in System.Windows.Forms.DataGrid control. I am also creating a custom datagrid deriving from the System.Windows.Forms.DataGrid class . If i use the above code in the custom DataGrid class, the MethodInfo mi = t.GetMethod("get_DataGridRows",BindingFlags.FlattenHierarchy | BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static); statement returns null. Is it not possible to obtain the method information of a base class?? Thanks for the help. Magesh Tag: DataGrid: Update datasource when closing form Tag: 86968
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    - XmlElement.SelectNodes: Need help with accessing xml nodes Any help will be really appreciated. When I use XmlNodeList nodeList; XmlElement root = doc.DocumentElement; nodeList = root.SelectNodes("/bookstore/book"); to select nodes matching the XPath string, from XML file below, I get one node which is OK. BUT, if I remove the ":bk" from the attribute of <bookstore> node, I will not get any nodes. WHY? I want to be able to do that. Thank you for your help. <?xml version="1.0" encoding="utf-8" ?> <bookstore xmlns:bk="urn:samples"> <book> <title>Pride And Prejudice</title> <author> <first-name>Jane</first-name> <last-name>Austen</last-name> </author> <price>24.95</price> </book> </bookstore> Tag: DataGrid: Update datasource when closing form Tag: 86967
  - 8
    - Bulk Load text into dataset? I have a non-delimited fixed-field text file with a record length of 5919 bytes long that I need to load into an existing empty dataset with 159 columns. Currently I am building a mapping like this: Do While sr.Peek() >= 0 dr = dt.NewRow dt.Rows.Add(dr) Dim nLine As String = sr.ReadLine() dt.Rows(iRow).Item("HH") = nLine.Substring(0, 2) dt.Rows(iRow).Item("MM") = nLine.Substring(2, 2) dt.Rows(iRow).Item("District") = nLine.Substring(4, 4) dt.Rows(iRow).Item("Exchange") = nLine.Substring(8, 8) dt.Rows(iRow).Item("Remote") = nLine.Substring(16, 8) dt.Rows(iRow).Item("Company") = nLine.Substring(24, 3) '''' ETC, ETC, ETC for 159 columns!.................................. Loop Is there some sort of 'bulk load' the data? This seems awfully cumbersome. Thanks in advance to all, Marc Tag: DataGrid: Update datasource when closing form Tag: 86966
  - 9
    - Moving a window I stripped off the frame from a window but I still want the user to be able to move it. If the user click on the background and moves the mouse around I have some code that hooks into that and does the move but the window keeps trying to redraw itself and it greats really crazy. Is there an nice way to do this? Hook into the default moving stuff without any custom code type thing? Thanks -Cam Tag: DataGrid: Update datasource when closing form Tag: 86959
  - 10
    - Windows application Icon Hi, I've modified the Windows application icon (App.ico) and now I can't see it when the application is in runtime and especially I cant't see it as icon of the file myapplication.exe... What should I do to restore the situation? I precise that in Visual Studio, when I open App.ico, I can see it. Thanks Tag: DataGrid: Update datasource when closing form Tag: 86957
  - 11
    - C# Balloon Tooltip from Sys Tray Icon How can I display a balloon tooltip from a system tray icon?? I can find plenty of examples on how to do this from C++ or even Visual Basic by calling the Shell_NotifyIcon function, but I can't find how to do this from inside C#. Tag: DataGrid: Update datasource when closing form Tag: 86953
  - 12
    - Windows Forms Panel Hi! We're developing a Windows Application kind of project under the Visual Studio .NET 2003 platform. This application has 3 main parts: - Element explorer developed with TreeView - Group of elements that show certain data - Document Viewer In the previous sections we show data from a codified XML file. This XML file is compound by static data and a group of MHT documents Base64 codified. These MHT documents are the documents viewed in the "Viewing" Section. It is in this section where we find the problem we want to ask about. In order to view this MHT document, we first transform them into HTML text, this HTML text is the one that's going to be viewed in the section. This section is formed with these elements: - Main Panel - Title Label - Controls Container Panel: in this panel the controls are added depending on the elements number in the XML file. - To show the title we use the Control Label - To show the MHT content(converted to MHT) the Activex AxDHTMLEDLib.AxDHTMLEdit is used. As we go through the data in the XML file we add the controls we just described, and also we have in mind the positions of the controls we added before, for example: Label1 X=0 Y=0 Height=30 Label2 X=0 Y=35 Height=30 Label3 X=0 Y=70 Height=30 DHTMLEdit1 X=0 Y=105 Height=60 The problem arises when we include a DTHMLEdit control. The problem is the DHTMLEdit added element does not respect the coordinates established in the code, appearing at any place in the containing panel. In the "Elements Explorer with TreeView" section there's a button placed half the way of the dark bar that collapse that section. The moment we collapse that section, the bad placed control, is placed in the right place and it gets correctly the coordinates we established previously. The error happens again when: - We start the application - We right click over the tree second node and we select "copy" - We right click over the tree first node, we select "paste all". The moment when it add the elements to the viewer, all the elements are out of place. - We right click over tany tree node save the first one, we select "add...". When the empty element is added to the Containing Panel and realocate all the elements in the Panel with valid coordinates, the Panel doesn't respect these coordinates and place the element in a non valid place. Same way when DHTMLEdit controls are wrongly placed, if we click on the arrow image in the scroll bar, those controls get placed correctly in the indicated places. For example, with the labels that are also included in the container panel, this problem doesn't appear, getting all of them rightly placed in their position. Thanks Julián Sanz García Tag: DataGrid: Update datasource when closing form Tag: 86952
  - 13
    - Installing dll in the Global Assembly Cache Hello, I would like to do the following: Place my own DLL file on a server, install it in the GAC of some cliënt computers and use the DLL file in a VB.NET program that is also located on the cliënt computers. When I make a small change to the dll on the server, every cliënt program should use this updated dll directly, without having to rebuild and redistribute the program. I was told that this could be done my placing the dll on a server and install it in the GAC of each cliënt. I have created a strong name for the dll and I use a fixed versionnumber for it. I have installed the dll in the GAC, but when I make a change to the dll, the executable program still shows results from the 'old' dll. Does anyone know what to do about this, so my program automatically uses the new version from the dll? Greetings, Chris. *** Sent via Developersdex http://www.developersdex.com *** Tag: DataGrid: Update datasource when closing form Tag: 86950
  - 14
    - Leave/Enter events Hi All, Is there a way to find out, on the leave-event, which control that is about to receive focus? Rgds Egil Winther ShipNet AS Tag: DataGrid: Update datasource when closing form Tag: 86948
  - 15
    - Logged in user's first name using active directory i want to get the first name of the logged in user on the current machine, windows application i used the following code but i get System.NullReferenceException when it reaches the Console.Writeline line string myADSPath = "LDAP://myadelaide.com/CN=Users,DC=myadelaide,DC=com" ; DirectoryEntry myDirectoryEntry = new DirectoryEntry(myADSPath); DirectoryEntry mySearchRoot = new DirectoryEntry(myADSPath); DirectorySearcher myDirectorySearcher =new DirectorySearcher(mySearchRoot); myDirectorySearcher.Filter="(objectClass=user)"; SearchResult mySearchResult = myDirectorySearcher.FindOne(); myDirectoryEntry.Name if ( mySearchResult != null ) { myDirectoryEntry =mySearchResult.GetDirectoryEntry(); Console.WriteLine(myDirectoryEntry.Properties["First name"].Value.ToString() ); } though i can get the DirectoryEntry.Name but any other- DirectoryEntry.Properties["Property name"]- dosen't work though the property count is 35 when i put DirectoryEntry.Properties into quick watch. any help please Tag: DataGrid: Update datasource when closing form Tag: 86946
  - 16
    - problems with restoring minimized MDI child form Hi Everybody, I've got a strange problem: While searching the newsgroups for something else, I've come across a post that discusses a bug with restoring MDI child forms. (for any body who is interested, the post is in microsoft.public.dotnet.framework.windowsforms by Scott Abel, the title is 'Form Message Question', from 2003-08-12 09:43:42 PST ) Briefly, the problem is that if you use Form.WindowStyle to restore a minimized MDI child that was maximized when it was minimized, the form will be restored as maximized (as it should) but then when you click on the restore button of the from it will be restored to the minimized size. That post also included a workaround for this bug (to use SendMessage to send a SC_RESTORE message to the form instead of using Form.WindowState). I have implemented this in my application. However, I've run into a strange problem: I have several child forms in my application. Some are opened using a menu, and some have buttons in a toolbar to open them. For some reason, this work around works when the code is called from a menu, but does NOT work when the code is called from the event handler of a button in the toolbar. I even created a menu item that calls the event handler of the toolbar button. When clicking on the menu item the form is restored, when clicking on the button it is NOT restored. Later on, I will try to reproduce this in a small application and will post the code. If anybody have any ideas why this happens or how to fix it, please let me know. Thanks Nadav Tag: DataGrid: Update datasource when closing form Tag: 86944
  - 17
    - Datagrid combobox.. problem Hi, I need to to have a combobox column on the grid. The problem is when the user selects a value from the combo , when the user clicks the combo in another row i need to remove the previously selected value from the combo list. So the user has only the left available values to be selected. I added an event in the DataGridComboBoxColumn that when user enters combobox an event is raised and in this event i am removing the items. In the DataGridComboBoxColumn class i have added a function which removes the item. And i call this function in the comboentered event i had subscribed...it works.i am able to remove item..but after removing the item..the previous row which i had selected the item.that column displays blank. anyone faced such a problem.. please help!! Tag: DataGrid: Update datasource when closing form Tag: 86938
  - 18
    - Changing Button shadow properties in C# I would to chand the default colors used to make a button look 3d. How do I do that in c#. Tag: DataGrid: Update datasource when closing form Tag: 86935
  - 19
    - Config file doesnt work when hosting control in IE as an ActiveX control from file system I want to install my user control in the GAC, regasm it and run it in a browser without pulling the control from a web URL. This is possible and explained in the MSDN KB article 305624 http://support.microsoft.com/d=ADefault.aspx?scid=3Dkb;en-us;Q305=AD624 I tried this and it works fine except it doesnt load my configuration file. It seems that the <link rel=3D"Configuration" .../> element is ignored when the object is loaded this way. I really need a way to load this config file and to run the control on the machine. We use the config file for tracing config and WSE config. The control needs to be on the machine so that I can guarantee that it runs in full trust mode. Tag: DataGrid: Update datasource when closing form Tag: 86934
  - 20
    - simplest way to use scrollbars without Autoscroll? Hi, I would like to use Form's AutoScroll property, but only partially. Everything is ok except scrolling when ActiveControl changes (the first part of "AutoScroll"). For example my code calls someControl.Focus() which results in scrolling even if the someControl is partially visible. Tab key and mouse click behave in the same way :( Is it possible to disable that part of autoscrolling features and still use built-in scrollbars? Maybe some WndProc() trick? I got it to work with AutoScroll=False but I don't like the idea of implementing all the scrolling from scratch (scrollbar events, page up/down etc keys, mouse wheel) Thanks in advance! Kaimar Seljamäe Tag: DataGrid: Update datasource when closing form Tag: 86929
  - 21
    - Bound Control Problem I have a DataTable with "FirstName" and "LastName" columns. How can I get my bound combo to show both these values as DisplayMember? Thanks! - Peder - Tag: DataGrid: Update datasource when closing form Tag: 86925
  - 22
    - Program won't work on one machine!! Help!!! My program is working on other machines but no matter how much I try it won't work on one of them. Here is the coredump, any help is appreciated!!! Microsoft (R) Common Language Runtime Test Debugger Shell Version 1.1.4322.573 Copyright (C) Microsoft Corporation 1998-2002. All rights reserved. (cordbg) a 0xdd0 Process 3536/0xdd0 created. Warning: couldn't load symbols for c:\windows\microsoft.net\framework\v1.1.4322\ mscorlib.dll Warning: couldn't load symbols for C:\Program Files\BBQB\QBI nterface.exe Warning: couldn't load symbols for c:\windows\assembly\gac\system.windows.forms\ 1.0.5000.0__b77a5c561934e089\system.windows.forms.dll Warning: couldn't load symbols for c:\windows\assembly\gac\system\1.0.5000.0__b7 7a5c561934e089\system.dll Warning: couldn't load symbols for c:\windows\assembly\gac\system.drawing\1.0.50 00.0__b03f5f7f11d50a3a\system.drawing.dll Warning: couldn't load symbols for c:\program files\bbqb\interop.qbfc4lib.dll [thread 0x8d0] Thread created. [thread 0xde4] Thread created. [thread 0x8d0] Unhandled exception generated: (0x011b8780) <System.Runtime.Inter opServices.COMException> _className=<null> _exceptionMethod=<null> _exceptionMethodString=<null> _message=(0x011bba74) "COM object with CLSID {DE818A9B-B88F-4594-9B97-9A830CB6 B3FF} is either not valid or not registered." _innerException=<null> _helpURL=<null> _stackTrace=(0x011bbb4c) array with dims=[36] _stackTraceString=<null> _remoteStackTraceString=<null> _remoteStackIndex=0x00000000 _HResult=0x80040154 _source=<null> _xptrs=0x00000000 _xcode=0xe0434f4d [001b] mov esi,eax (cordbg) Tag: DataGrid: Update datasource when closing form Tag: 86924
  - 23
    - Binding on non-default property sets datarowstate modified Hi, I've got the following problem with databinding: If I bind a column of a dataset e.g. on the Text property of a Textbox, everything acts as expected, i.e. if you don't make any changes to the text in the textbox, the rowstate of the bound row stays unchanged. On the contrary, when you bind e.g. the Tag property of the Textbox, instead of the text property, the rowstate turns to modified when leaving the textbox (or by calling the bindingmanager.endcurrentedit method), even if you haven't changed a thing. This is very inconveniant because it causes unnecessary updates of the database. It seems that binding on the non default property (Text) causes changes of the underlying dataset. You can find the test cde below (button1_click fills a datasource where the control is bound to; acceptchanges ensures that the rowstate is modified) The button2_click writes out the rowstate before and after the endcureentedit call of the bindingmanager. How can we avoid this ??? Thanks !!! Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click _bm = Me.BindingContext(Me._data, "TEST") Me._data.Clear() Me._data.TEST.AddTESTRow("ID", "TEKST") Me._data.AcceptChanges() End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Debug.WriteLine(Me._data.TEST(0).RowState.ToString) Me._bm.EndCurrentEdit() Debug.WriteLine(Me._data.TEST(0).RowState.ToString) End Sub Tag: DataGrid: Update datasource when closing form Tag: 86920
  - 24
    - icons on XP and W2k I have a .NET application which is targeted at both W2k and XP. My form's icons are XP style icons 32-bit. When it is running on W2k, the icons do not look correct. I understand that W2k does not support 32-bit icons with 8-bit alpha channels. My question is what can I do so that when my app is running on XP - it will display the XP icon and when it is running on W2k - it will display a 256-colored icon? Would I have to resort to detecting through code if I am running in W2k and then switch the icon property through code? Or is there a better way? Thanks Kennedy Tag: DataGrid: Update datasource when closing form Tag: 86915
  - 25
    - Datagrid bound to empty collection I have a datagrid bound to a collection that implements IBindinglist. Within the collection, I have included a default public property that should provide for a strongly-type collection. Supposely this is suppose to provide to databinding a structure it can use if the collection is empty. When executed, when the collection is empty, I still receive an error. What am I doing wrong? Tag: DataGrid: Update datasource when closing form Tag: 86914

Hi,

The situation is the following: A user is editing a cell in a DataGrid, and
hasn't pressed <return> or <enter>, so the value is being edited. The user
then closes the form. I would like to update the value to the data source if
it is valid, or prevent closing the form if the edited value is invalid.

Actually, all I need for this to accomplish are the following two functions:
(1) A function that tells me whether or not the user is actually editing a
cell's contents.
(2) A function that tries to end the edit operation, and returns whether
ending the operation succeeded. Ending the edit operation should fail if the
value being edited is invalid (not valid).

I haven't found these yet.
About (1): I've checked DataRowView's IsEdit member, but I tested it and it
seems to return true even if a user isn't editing a cell in that row.
About (2) DataGrid has an EditEdit method. Sadly it returns false when no
cell is being edited, so I can't make the distinction between an invalid
entry or the fact that the cell isn't being edited. So using (2) alone
doesn't work.

Thanks for any help
--
Tom Tempelaere.

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RE: DataGrid: Update datasource when closing form by _|\|_0$P

_|\|_0$P
Fri Apr 22 05:40:21 CDT 2005

Small typo, see below

"TT (Tom Tempelaere)" wrote:

> Hi,
>
> The situation is the following: A user is editing a cell in a DataGrid, and
> hasn't pressed <return> or <enter>, so the value is being edited. The user
> then closes the form. I would like to update the value to the data source if
> it is valid, or prevent closing the form if the edited value is invalid.
>
> Actually, all I need for this to accomplish are the following two functions:
> (1) A function that tells me whether or not the user is actually editing a
> cell's contents.
> (2) A function that tries to end the edit operation, and returns whether
> ending the operation succeeded. Ending the edit operation should fail if the
> value being edited is invalid (not valid).
>
> I haven't found these yet.
> About (1): I've checked DataRowView's IsEdit member, but I tested it and it
> seems to return true even if a user isn't editing a cell in that row.
> About (2) DataGrid has an EditEdit method. Sadly it returns false when no

Of course I meant EndEdit, not EditEdit.

> cell is being edited, so I can't make the distinction between an invalid
> entry or the fact that the cell isn't being edited. So using (2) alone
> doesn't work.
>
> Thanks for any help
> --
> Tom Tempelaere.

Top