Getting the Error Code from the Exception Object

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- Previous
  - 1
    - How to specify width of each of the columns of a DataGrid? I am feeding a class as the DataSource of the DataGrid. When the processing is done this data grid then displays the data in four columns. Now, I know you can specify table styles for a data grid, but what about being able to specify the width of each and every one of the columns of the datagrid rather than as a whole (same width for all columns which is easy)? I don't want to have to resize the columns at runtime every time the application is run. Thx, Emilio Tag: Getting the Error Code from the Exception Object Tag: 81338
  - 2
    - selectedindexchanged not in winform datagrid?????? hello in my winform,there is a datagrid,i want to fire some actions when the selected index is changed,but i fail to find the SelectedIndexChanged event to the winform datagrid,why? how can i implement such a function with the winform datagrid???\ thank you Tag: Getting the Error Code from the Exception Object Tag: 81331
  - 3
    - Forms in Class Libraries - Beginners Question Hi I am just beginning learning Dot Net, though I am a fairly experienced VB6 traditional developer. I have a Solution which contains of libraries of classes which I want to reuse widely in multiple projects , including some forms which I want to inherit. These forms need to show the output of the back -office classes often using 'MessageBox.Show. Because the form is stored in a class library it seems to have lost some function including MessageBox. Is there a simple way round this by importing the right namespace or is this a no-no for Windows forms stored in Class Libraries Roger Stenson Tag: Getting the Error Code from the Exception Object Tag: 81321
  - 4
    - OpenDialogBox.ReadOnlyChecked has a weird behavior The ReadOnlyChecked property of the OpenDialogBox class does not always report the correct value. If I select more than one file, the ReadOnlyChecked property reports that it is checked even if it is not. There is one except to this weird behavior which is if I select one file and uncheck the "Open as read-only" checkbox then all subsequent calls to ShowDialog will work correctly. Below are the steps to repeat this problem. Can anyone help? Call ShowDialog Select more than one file Uncheck "Open as read-only" Click OK Query ReadOnlyChecked; true is returned (it should return false) Call ShowDialog Select one file Uncheck "Open as read-only" Click OK Query ReadOnlyChecked; false is returned Call ShowDialog Select more than one file "Open as read-only" is already unchecked Click OK Query ReadOnlyChecked; false is returned (it works now) Tag: Getting the Error Code from the Exception Object Tag: 81315
  - 5
    - Non client area Hello How can I draw the non client area of a window from C#? Does anyone have an ideea? Is it possible? Tag: Getting the Error Code from the Exception Object Tag: 81314
  - 6
    - unhandled Exception in GDI Windows Forms When running a program in Virtual PC, using dynamic screen resolutions if the resolution is something off the norm, ie 1048x805. DirectX 9.0 installed, .Net Framework 1.1 SP1 install, Virtual PC Extensions SP1 and a new installed program installed. Running Windows 98,98SE or WinME. When the program first starts up you will get the following error: See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI+. at System.Drawing.Graphics.CheckErrorStatus(Int32 status) at System.Drawing.Graphics.DrawString(String s, Font font, Brush brush, RectangleF layoutRectangle, StringFormat format) at System.Windows.Forms.GroupBox.OnPaint(PaintEventArgs e) 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.GroupBox.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) ************** Loaded Assemblies ************** mscorlib Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.2032 CodeBase: file:///c:/windows/microsoft.net/framework/v1.1.4322/mscorlib.dll ---------------------------------------- InstallTrk Assembly Version: 1.2.1797.17860 Win32 Version: 1.2.1797.17860 CodeBase: file:///C:/PROGRAM%20FILES/EARTHLINK,%20INC/INSTALLTRK/INSTALLTRK.EXE ---------------------------------------- System.Windows.Forms Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.2032 CodeBase: file:///c:/windows/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll ---------------------------------------- System Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.2032 CodeBase: file:///c:/windows/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll ---------------------------------------- System.Drawing Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.2032 CodeBase: file:///c:/windows/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll ---------------------------------------- Accessibility Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/accessibility/1.0.5000.0__b03f5f7f11d50a3a/accessibility.dll ---------------------------------------- ************** JIT Debugging ************** To enable just in time (JIT) debugging, the config file for this application or machine (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: <configuration> <system.windows.forms jitDebugging="true" /> </configuration> When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the machine rather than being handled by this dialog. The fix/work around is to set the screen resolution to one of the standard modes, ie 800x600 run the program successfuly once, then change the screen resoution to what ever you want and the program will continue to work. If you uninstall and reinstall you will have to repeat this step. -- Bob Brown Tag: Getting the Error Code from the Exception Object Tag: 81311
  - 7
    - Get bitmap from clipboard problem I have a program where I'm copying a bitmap from the clipboard and displaying it. It seems that after I perform this operation a few times (3-4) even after confirming there is bitmap data on the clipboard {if (iData.GetDataPresent(DataFormats.Bitmap))} when I get the data it returns null. I have made a simple test case in MSVC.NET File->New->Project->Windows Application. Under the InitializeComponent() I added this simple test case. for (int i = 0; i < 10; i++) { // Get the image from the clipboard IDataObject iData = Clipboard.GetDataObject(); // Make sure we have a bitmap available if (iData.GetDataPresent(DataFormats.Bitmap)) { Image kImage = (Image)iData.GetData(DataFormats.Bitmap); int t = 0; // So we can see kImage in debugger } } The first 3 times kImage will be a System.Drawing.Bitmap object. Afterwards it will be null. I can only imagine that there is some sort of resource limit I'm coming up against (This is my first C# project). I'm using a "print screen" capture (3120 x 2400) which is quite large. Remember to put something on the clipboard to test. Printscreen works great. Thank you in advance for any help you can provide! Christopher Tag: Getting the Error Code from the Exception Object Tag: 81309
  - 8
    - Finding an item/node in the treeview What is the most efficient way to search a node in the treeview. I could not find any built in method in that control and walking through the tree does not sound right. -- Thanks for your help. Harshad Rathod Tag: Getting the Error Code from the Exception Object Tag: 81305
  - 9
    - error caused possibly by overriding WndProc method of form while using UIP AB I get this error randomly that doesn't seem to cause anything to not work correctly. The exception is caught, and seems to not affect the application at all: The code I used to make is so the form cannot be moved: private const int WM_NCLBUTTONDOWN = 0XA1; private const int WM_SYSCOMMAND = 0X112; private const int HTCAPTION = 0X2; private const int SC_MOVE = 0XF010; protected override void WndProc(ref Message m) { if (m.Msg == WM_SYSCOMMAND && m.WParam.ToInt32() == SC_MOVE || m.Msg == WM_NCLBUTTONDOWN && m.WParam.ToInt32() == HTCAPTION) return; } base.WndProc(ref m); } The exception: General Information ********************************************* Additional Info: ExceptionManager.MachineName: XXXXXXXXXX ExceptionManager.TimeStamp: 12/1/2004 1:26:24 PM ExceptionManager.FullName: Microsoft.ApplicationBlocks.ExceptionManagement, Version=1.0.1441.27626, Culture=neutral, PublicKeyToken=null ExceptionManager.AppDomainName: AdltTestUILoader.exe ExceptionManager.ThreadIdentity: ExceptionManager.WindowsIdentity:XXXXXXXXXX\Administrator 1) Exception Information ********************************************* Exception Type: System.NullReferenceException Message: Object reference not set to an instance of an object. TargetSite: Void Form_Activated(System.Object, System.EventArgs) HelpLink: NULL Source: Microsoft.ApplicationBlocks.UIProcess StackTrace Information ********************************************* at Microsoft.ApplicationBlocks.UIProcess.WindowsFormViewManager.Form_Activated( Object source, EventArgs e) at System.Windows.Forms.Form.OnActivated(EventArgs e) at System.Windows.Forms.Form.set_Active(Boolean value) at System.Windows.Forms.Form.WmActivate(Message& m) at System.Windows.Forms.Form.WndProc(Message& m) at TxDpsAdlt.UI.BaseForm.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) Is there anyway to figure out what is happening? Like I said, it happens very irregularly, so I can't really debug it. thanks a bunch! Tag: Getting the Error Code from the Exception Object Tag: 81304
  - 10
    - Thread Part 3 Hello and Thanks again, Maybe I am not explaining what I am looking for good enough and maybe I should not be using muli-threads at all. What I am after is the following: Form1 instantiates Form2 using SHOW, which is always on top. Form2 is a clipboard, where the user can copy and paste information into it and into Form3 which will filled with Textboxes. In Form2 (The clipboard) there is a button that says "Send Data To Form3". Background Info: Form1 has a button that say's "Add New Data". When the "Add New Data" button is clicked, From3 is displayed using SHOWDIALOG. Here the user can add new data to a database. When Form2's button is clicked ("Send Data To Form3"), I need Form3 to be displayed using SHOWDIALOG so that only one instance of the form is being used at a time. I still need Form2 (The clipboard) to be on top and still usable (Able to be moved and accessed) Thanks, Chuck Tag: Getting the Error Code from the Exception Object Tag: 81303
  - 11
    - Print Preview Prints Blank pages.... Hi Im trying to print out contents of a panel. I use the Graphics object to draw what I want to print and the print preview displays everything OK but when I print the contents the printer prints out blank page? here is a little description what this class does; I have a Panel that consists of other panels. Each of the inner panels consists of other controls that I have to print out. I create an enumerator to print the panels in reverse order. here is my code.. most of it I found on the net... Hopefully someone can help me with this problem.... Im sure this is a minor problem but I can't figure it out by myself? public class PrintForm { private Control _ctrl = null; private int _iCurrentPageIndex = 0; private int _iCurrentControlIndex = 0; private int m_DocHeight = 900; private int m_DocWidth = 624; private int m_iPaperHeight = 0; private Control m_CurrCtrl = null; private bool m_bHasMorePages = false; private ArrayList m_alControls = new ArrayList(); private IEnumerator ieGrunnBelti = null; private int m_iTop = 0; public PrintForm(Control ctrl) { _ctrl = ctrl; } public void Print() { Print(_ctrl); } public void Print(Control ctrl) { if (ctrl == null) return; ieGrunnBelti = _ctrl.Controls.GetEnumerator(); this.ControlsToArray(_ctrl); PrintDocument pd = new PrintDocument(); pd.BeginPrint += new PrintEventHandler(this.PrintDocument_BeginPrint); pd.PrintPage += new PrintPageEventHandler(this.PrintDocument_PrintPage); PrintPreviewDialog ppd = new PrintPreviewDialog(); ppd.Document = pd; ppd.ShowDialog(); } private void ControlsToArray(Control p_ctrl) { while(ieGrunnBelti.MoveNext()) m_alControls.Add(ieGrunnBelti.Current); _iCurrentControlIndex = m_alControls.Count; } private Point[] GeneratePrintingOffsets(Rectangle rMargins) { ... } private void DrawControl(Control ctrl,Point ptOffset, Graphics g, ref PrintPageEventArgs e) { m_bHasMorePages = false; Control c = null; while(m_alControls.Count > 0) { --_iCurrentControlIndex; if(_iCurrentControlIndex < 0) break; c = (Control)m_alControls[_iCurrentControlIndex]; Point p = new Point(c.Left, c.Top - m_iTop); p.Offset(ptOffset.X, ptOffset.Y); if(c is Skyrslubelti.clsGrunnBelti || c is Skyrslubelti.SkyrslaAreksturBill) { if((m_iPaperHeight + c.Height) < m_DocHeight) m_iPaperHeight += c.Height; else { m_iPaperHeight = 0; _iCurrentPageIndex++; ++_iCurrentControlIndex; m_iTop = c.Top; m_bHasMorePages = true; break; } DrawFrame(c, p, g); this.DrawSkyrsluBelti(c,p,g); } } if(m_bHasMorePages) e.HasMorePages = true; else e.HasMorePages = false; } private void DrawSkyrsluBelti(Control p_ctrl, Point ptOffset, Graphics g) { foreach(Control c in p_ctrl.Controls) { Point p = new Point(c.Left, c.Top); p.Offset(ptOffset.X, ptOffset.Y); if (c is Label) DrawLabel((Label)c, p, g); else if (c is CheckBox) DrawCheckBox((CheckBox)c, p, g); else if(c is PictureBox) DrawImage((PictureBox)c, p, g); else if (c is Skyrslubelti.clsSkyrslaTexti) DrawLine(c, p, g); else if (c is RichTextBox) DrawRTB((RichTextBox)c, p, g); else if (c is Skyrslubelti.SkyrslaAreksturBill) DrawFrame(c, p, g); DrawSkyrsluBelti(c, p, g); } } private void DrawImage(PictureBox pb, Point p, Graphics g) private void DrawLabel(Label lbl, Point p, Graphics g) private void DrawLine(Control c,Point p, Graphics g) private void DrawFrame(Control c,Point p, Graphics g) private void DrawRTB(RichTextBox p_RTB,Point p, Graphics g) private void DrawCheckBox(CheckBox chk, Point p, Graphics g) private void PrintDocument_BeginPrint(object sender, PrintEventArgs e) { this._iCurrentPageIndex = 0; } private void PrintDocument_PrintPage(object sender, PrintPageEventArgs e) { Rectangle rPageMargins = new Rectangle(e.MarginBounds.Location, e.MarginBounds.Size); Point[] ptOffsets = GeneratePrintingOffsets(rPageMargins); e.Graphics.SetClip(rPageMargins); Point ptOffset = new Point(-ptOffsets[0].X, -ptOffsets[0].Y); ptOffset.Offset(rPageMargins.X, rPageMargins.Y); DrawControl(_ctrl,ptOffset, e.Graphics, ref e); } } Tag: Getting the Error Code from the Exception Object Tag: 81302
  - 12
    - Form Inheritance and missing controls Ok, I know this is going to sound odd but this is what I am seeing. I have a form inheritance chain that looks like this: baseform --> childform -- > two seperate endforms (endform1, endform2) When I open the designer for childform I only see the controls that were laid out in baseform. When I open either endforms I only see what was defined in baseform + childform. Attaching to the vs process and attempting to debug into InitializeComponent when opening the designer for endform1, it never hits the breakpoints in endform1 even in the constructor. It does however hit the breakpoints in childform's constructor. So essentially I now have a bunch of forms that I cannot edit in the designer. Does anyone have any clue as to what is going on? Thanks, CMD Tag: Getting the Error Code from the Exception Object Tag: 81299
  - 13
    - How to change the datagrid row text color??? --- URGENT!!! Hi there! I need to change the datagrid row text color, but I don't know how can I do it? Please, anything help are wellcome! Marcus VinÃcius Tag: Getting the Error Code from the Exception Object Tag: 81293
  - 14
    - Literal percentage symbol in rowfilter I have a dataview that accepts input from the user before being applied. That's fine except where the text they want to search for includes the % character. How do I do Fullname like '*a%b*' where I want the % handled as an actual character? Thanks Tag: Getting the Error Code from the Exception Object Tag: 81291
  - 15
    - how to check/uncheck the checkbox in datagrid I have datagrid with 5 items. Out of which 1 items are checkboxes. The bool column(checkbox column ) in added in datagrid. The rest of Data is binded dynamically to the datagrid Based on some values from the database I have to check or uncheck the checkbox in the datatgrid. i am not able to change the value of checkbox at runtime. Does any one know how to do this in windows form? Tag: Getting the Error Code from the Exception Object Tag: 81287
  - 16
    - Serial Communications - Threading I have written an winform application (c#) that uses serial communication to transmit and receive data to a device that users respond to by pressing various proximity sensors. The data is transmitted and received correctly and all works well. A part of the application is to flash LEDs on the device when the it has not been used for some while, in the meantime the UI goes into a form of a Screen Saver. The device then waits for a sensor to be touched and if so, then returns into life. Unfortunately, when i transmitt the commands to flash the LEDs the application hangs until the transmitt has completed and as it transmits upto 10 flashes, this is very slow (app does not respond until transmits are complete). Can anyone reccommend a method for transmitting (perhaps on a thread) and not having to wait for the transmitt to complete i.e. so that UI does not freeze. Thank you for your help Tag: Getting the Error Code from the Exception Object Tag: 81286
  - 17
    - Inline custom editor in PropertyGrid Hi, Currently, possible values of UITypeEditorEditStyle is either model, dropdown or none. Is there no way to have a custom editor displayed inline within the PropertyGrid? Could be useful for custom editors such as mask edit etc. Thanks, Anita Tag: Getting the Error Code from the Exception Object Tag: 81278
  - 18
    - windows db appliation This is a multi-part message in MIME format. ------=_NextPart_000_0044_01C4D7C1.3EEF59F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I am working on developing window application using vb.net, application = is ms-sql data driven, I have different windows groups will have to = access / permission to different menus and icons from tool bar. any suggestion on good practices / sample application used as reference = about securities and setting . Thanks Tim ------=_NextPart_000_0044_01C4D7C1.3EEF59F0 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 6.00.2800.1476" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV> <DIV><FONT face=3D"Times New Roman" color=3D#000080>I am working on = developing=20 window application using vb.net, application is ms-sql data driven, I = have=20 different windows groups will have to access / permission to different = menus and=20 icons from tool bar.</FONT></DIV> <DIV><FONT face=3D"Times New Roman" color=3D#000080>any suggestion on = good practices=20 / sample application used as reference about securities and setting=20 .</FONT></DIV> <DIV><FONT face=3D"Times New Roman" color=3D#000080></FONT> </DIV> <DIV><FONT face=3D"Times New Roman" color=3D#000080></FONT> </DIV> <DIV><FONT face=3D"Times New Roman" color=3D#000080>Thanks</FONT></DIV> <DIV><FONT face=3D"Times New Roman" color=3D#000080></FONT> </DIV> <DIV><FONT face=3D"Times New Roman"=20 color=3D#000080>Tim</FONT></DIV></DIV></BODY></HTML> ------=_NextPart_000_0044_01C4D7C1.3EEF59F0-- Tag: Getting the Error Code from the Exception Object Tag: 81268
  - 19
    - Populating a Combo Box with instances of a class - problem Hi! I'm feeling the burn of .NET; Still getting used to it :) I'm trying to populate a combo box with instances of a class: Public Class Shortcut Private Name As String Private RealLocation As String Public Sub New() Me.Name = "unknown" Me.RealLocation = "unknown" End Sub Public Sub New(ByVal Name As String, ByVal Path As String) Me.Name = Name Me.RealLocation = Path End Sub Public Function getName() As String Return (Me.Name) End Function Public Function getRealLocation() As String Return (Me.RealLocation) End Function Public Overrides Function toString() As String Return (Me.Name) End Function End Class My problem is the following code: With cmb .ValueMember = "getRealLocation" .DisplayMember = "toString" .Items.Add(New Shortcut("Label1", "Full Path1")) .Items.Add(New Shortcut("Label2", "Full Path 2")) .Items.Add(New Shortcut("Label3", "Full Path 3")) End With When the combo list isn't activated, the combo box shows the results of the toString function, for the specific instance that is selected. However, when I click the drop-down button, it shows a list of blank entries. Selecting a blank entry again shows the results of the toString function of the instance I apparently selected. How can I make each entry have a value whent he combobox drop-down list is showing, not just once a specific item in the list is selected. It's hard to make choices when there's only blank options =/. Thanks again! Tag: Getting the Error Code from the Exception Object Tag: 81267
  - 20
    - ListView, IComparer & column-re-ordering... Hi All! I use a special ListViewItemComparer-class to sort items in a listview for any column, and I have also allowed column-reordering. So far so good, but if I click the columnheader of any column, and the columnorder is not 'default', the listview 'forget' my column-re-ordering (i.e 0 2 1), and sets column-order back to default (i.e. 0 1 2). Is there anyone that might know what I have forgot to code in my ListViewItemComparer-class? Some info: - I use VS 2003, framework 1.1 - I use SendMessage with LVM_SETCOLUMNORDERARRAY to set the columnorder at startup. TIA Per Rollvang Tag: Getting the Error Code from the Exception Object Tag: 81266
  - 21
    - Threading Part 2 Hello and thank you for your assistance. I have attempted to accomplish what I need using delegates with no success. i.e. //Button Click// Dim PollThread As Threading.Thread PollThread = New Threading.Thread(AddressOf PollThreadAddress) PollThread.Start() End Sub Private Sub PollThreadAddress() frm1PollDatabase.TopMost = True frm1PollDatabase.ShowDialog() End Sub //Button Click inside frm1PollDatabase that raises an event inside the Parent Form// Delegate Sub FromMyPage() Dim MyDeleg As FromMyPage Private Sub ApplyMyPage MyDeleg = New FromMyPage(AddressOf DelegateFromMyPage) MyDeleg.Invoke() End Sub Private Sub DelegateFromMyPage() frm1Modify.showdialog End Sub ** frm1PollDatabase is created inside a new thread and must always be on top, which works fine. But when the user wants to send that data from this form to a new form (frm1Modify) the form is displayed but frm1PollDatabase becomes disabled because of the Showdialog method. I cannot use show for this form to be displayed. If the original thread (Main) displays this form wont it prevent this problem? The above code did not keep frm1PollDatabase from being disabled. Thanks Again, Chuck Tag: Getting the Error Code from the Exception Object Tag: 81256
  - 22
    - Accessing data on main form from another form Can someone tell me how I would go about setting up a form the accesses the controls on another form in VC.NET? I have a graph set up on the main form and would like to open another form that has formatting options for the graph. Changes on the options form will update the properties of the graph on the main form. Thanks in advance for your help. Dave Tag: Getting the Error Code from the Exception Object Tag: 81252
  - 23
    - Window subclassing and mouse events VS.NET 2003, VB.NET, .NET 1.1 I'm working on a part of a project that is re-creating the Office 2003 mail notification window. I have almost everything done except for one part. I need to allow the user to move the window by clicking and dragging anywhere in the window (the window has no title bar.) Per many different sources, I have overridden the WndProc() method of my window thusly: --------------------------------- Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message) Call MyBase.WndProc(m) Select Case m.Msg Case WM_NCHITTEST If m.Result.ToInt32 = HTCLIENT Then m.Result = New IntPtr(HTCAPTION) End Select End Sub --------------------------------- When I run the form, all is well - almost. I have found that when I do this, I don't get any of my form's mouse events. I am doing a lot of hand-work here, so I have MouseEnter, MouseLeave, and MouseDown events coded. These perform various functions that simulate functionality I would normally get by using controls (buttons, linklabels, etc.) but chose not to use. My reasons for not using them is because of the functionality I am trying to simulate: 1. The form fades in to 20% transparency when it's shown. It then begins a timer for fade-out (time set by the user, with an application default provided.) 2. If the mouse moves into the form, it goes to 0% transparency (opaque). 3. If the mouse leaves the form, it returns to 20% transparency. 4. The form will fade away at the first opportunity - either when reaching the fade-out time, or when the mouse leaves the form, whichever happens *last*. Using controls caused MouseEnter and MouseLeave events to fire on the controls and form multiple all over the place, and I wasn't able to handle them in any sort of satisfactory way. So I dumped the controls and wrote it all by hand. Since I don't get the mouse events, nothing happens when the mouse moves within the form. The form does not go opaque, and the fade-out will happen even if the mouse is within the form. I suppose I could re-create the functionality within the WndProc() method, but I don't understand why I have to - since my custom WndProc() is not trapping mouse events, and the first thing I do is call the base method, those should still fire - right? What am I missing? Any help would be appreciated. TIA - Scott Tag: Getting the Error Code from the Exception Object Tag: 81249
  - 24
    - Parental Filter I am looking to create our own Adult Filter using VB.Net. Any suggestions??? Thanks, Mark Tag: Getting the Error Code from the Exception Object Tag: 81247
  - 25
    - Strange exception in windows forms Hello, In windows applications I sometime get this starnge exception: System.ObjectDisposedException: Cannot access a disposed object named "q". Object name: "q". at System.Windows.Forms.Control.CreateHandle() at System.Windows.Forms.Control.get_Handle() at System.Windows.Forms.Control.WmPaint(Message& m) 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) It never happens on development computers only on clients. I don't have object named "q". Does anybody has any idea what may lead to this exception? Thanks Mark Tag: Getting the Error Code from the Exception Object Tag: 81245
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  - 1
    - InputBox in VC#.net? In VB, we have InputBox to allow a user to input text. Do we have a similar one in VC#.net? Obviously, MessageBox can not do it. Thanks. Tag: Getting the Error Code from the Exception Object Tag: 81242
  - 2
    - XP Themed Selection Rectangle for Listview Control Does anyone know how to get that blue selection rectangle that is in the windows explorer Listview control. In my listview controls it is just a dotted focused rectangle. Etan Bukiet Tag: Getting the Error Code from the Exception Object Tag: 81241
  - 3
    - Looking of Free and facny treeview control I am looking for fancy shareware treeview control like one available from Softeldvm.com (costs $500). Does anyone know? -- Thanks for your help. Harshad Rathod Tag: Getting the Error Code from the Exception Object Tag: 81240
  - 4
    - OnKeyDown in modeless form I have an application that displays a modeless form. On this form i want to trap certain keys. For example ctrl-right, ctrl-left, ... I have these keys already working on the main form of my application, but know i need to trap them in a seperated modeless form, but the onkeydown event is not being fired. How do i go about trapping these keys. Tag: Getting the Error Code from the Exception Object Tag: 81239
  - 5
    - Multiple minimize and maximize buttons appering on MDI menu contro Below is text of the simillar problem we are facing allready posted by another user on the net... I have created an MDI application. When the first child form is opened and maximized one set of minimize, restore and close buttons are displayed on the menu bar. After closing the child window a set of minimize, restore and close buttons remain even though the child form has been closed. EXAMPLE: http://novasolution.net/Error2-2.jpg When a second set child form is opened and closed a second set of minimize, restore and close are shown on the menu bar. Each time a child form is opened and closed, another set of controls appears on the menu bar. When I open a new child form the multiple sets of buttons disappear. When the child form is maximized, only one set of buttons displays in the menu bar. When the child window is closed another set of buttons is displayed on the menu bar. some how we are unbale find a solution to this problem.. Any ideas.. Example Tag: Getting the Error Code from the Exception Object Tag: 81234
  - 6
    - Forms pseudo MDI support While trying to implement a MDI Application I found that the Windows.Forms classes that implement this functionality don't actually use the WIN32 MDI API. Using Spy++ I found that the MdiClient class does not use the 'MDICLIENT' window class. I also hooked up a Messagefilter to look at the MDI messages send to the mdiclient, the only messages I saw were WM_MDISETMENU and WM_MDIREFRESHMENU. Can anyone confirm this or does anyone know why this was done? Tag: Getting the Error Code from the Exception Object Tag: 81233
  - 7
    - UPDATE SQLTABELLE VS2003 C# Ich habe einen SQLDATAADAPTER erstellt und ein DATSET generiert. Diese Dataset stelle ich in einem DATAGRID dar. In der Tabelle ist das Feld UKID als Primärschlüssel definiert und damit werden keine Nullwerte zugelassen. Num füge ich im DATAGRID einen Satz hinzu und update den SQLDATAADAPTER(DATASET). Die neuen Sätze stehen in der SQl-Tabelle. Nun möchte ich aber im DATAGRID das Feld UKID (Primärschlüssel) nicht mit anzeigen und somit bei kann ich bei einem neuen Satz auch keinen Wert im DATAGRID dafür eintragen. Betätige ich dann den Button zum Update des SQLDATAADAPTERS erhalte ich folgende Fehlermeldung "Spalte UKID läßt keine Nullen zu ..." Wie kann ich dem Feld UKID einen Wert im Code zuweisen, damit ein neuer Satz im DATAGRID akzeptiert wird? Das heist, der Nutzer soll bei einem neuen Satz im DATAGRID nicht die UKID eintragen können, die soll im Programmcode mit einem Wert belegt werden. Mit freundlichen Grüßen Hendrik Petzold Tag: Getting the Error Code from the Exception Object Tag: 81232
  - 8
    - Control layout problem with system large fonts I have seen many people stating that they have the same problem. I have the font DPI setting set to 125% normal size (from the Display Properties dialog when you right-click on the Desktop). If a Windows Form is more than simle (has many controls), then the most chance is that when the Form is shown in runtime, the layout is somewhat in right condition (Some controls might position beyond the visible client area). I am not sure if Microsoft noticed this problem. I think it is a very *BAD* problem, based on that Microsoft/Windows have been strong in user friendly GUI since their beginning. My $0.02. Tag: Getting the Error Code from the Exception Object Tag: 81231
  - 9
    - Threading Hello, I am making a app that creates a thread to show a clipboard. If the clipboard is double clicked, another window is displayed, the event is handled inside the main app. What I would like to do is have the clipboard use the main thread of the application that called it to handle the new window. Is this possible and if so how would this be accomplished. ie. Form1 creates a thread and the thread displays Form2. Form2 when double clicked raises an event that creates a new form (Form3). The event is handled inside Form1. How can I get Form3 to be managed by the main thread (Form1)? Thanks, Chuck Tag: Getting the Error Code from the Exception Object Tag: 81225
  - 10
    - thread safety Can anyone suggest a good (cheap) tool that will detect when a worker thread calls directly in to a control on the UI thread? Thanks for your help Graham Tag: Getting the Error Code from the Exception Object Tag: 81220
  - 11
    - Auto Expanding TextBox/Controls Hi there, I've googled this problem, and not found a suitable solution yet. I was wondering if anyone has made any progress? Basically, I want to make a textbox automagically adjust it's height to show all the text it contains. So, if I add text then it grows, and it shrinks if I remove text. This is similar to the CanGrow property in MS Access controls. I'm willing to purchase a control if anyone knows of any, I'd just like to get this cracked without spending *too* much time "fiddling" about! Any help much appreciated Tobin Tag: Getting the Error Code from the Exception Object Tag: 81217
  - 12
    - Add user control to winforms Toolbox I created a user control which I signed and added to GAC. Users add the control to the toolbox by navigating to the dll. However when they drag and drop the control from the toolbox onto the winform they get an error, which basically means they need to manually add references to other dlls which are referenced by my user control dll. Is there a solution to this? Thank you Tag: Getting the Error Code from the Exception Object Tag: 81214
  - 13
    - using the modem directly hi I need my Win App to connect with my WS But when the App need to stablish a connection I want it to be transparent to the user MyQuestion: How can I use the modem directly passing the phone number etc from the win app? I dont want the Dialup networking windows to apear neverr. any sug -- Kenny M. Tag: Getting the Error Code from the Exception Object Tag: 81213
  - 14
    - Transparent control Hi, I have to write transparent control - simple red rectangle. When I mouse move control should change position(left and top). The problem is when red rectangle is moving over other controls such Buttons, PictureBoxes it flicker. Below is code of rectangle control : public class TransRectangle : System.Windows.Forms.UserControl { public TransRectangle() { InitializeComponent(); } protected override CreateParams CreateParams { get { CreateParams cp=base.CreateParams; cp.ExStyle|=0x00000020; //WS_EX_TRANSPARENT return cp; } } //Override the OnPaintBackground event. This is ecessary //to prevent the background to be painted. protected override void OnPaintBackground(PaintEventArgs e) { // do nothing } protected void InvalidateEx() { if(Parent==null) return; Rectangle rc=new Rectangle(this.Location,this.Size); Parent.Invalidate(rc,true); } protected override void OnMove(EventArgs e) { this.InvalidateEx(); Graphics g = this.CreateGraphics(); g.DrawRectangle(Pens.Red, 0, 0, this.Width - 1, this.Height -1); g.Dispose(); } protected override void OnPaint(PaintEventArgs e) { e.Graphics.DrawRectangle(Pens.Red, 0, 0, this.Width - 1, this.Height -1); } protected override void OnMouseMove(MouseEventArgs e) { this.Left += e.X; this.Top += e.Y; base.OnMouseMove (e); } public void pInvalidate() { this.InvalidateEx(); } } Regards, Olo Tag: Getting the Error Code from the Exception Object Tag: 81208
  - 15
    - How to print AxWebBrowser control? Hello, how do I submit AxWebBrowser control to print? Thank you Tag: Getting the Error Code from the Exception Object Tag: 81205
  - 16
    - User Control's Load event fires when the Dispose method executes I have a user control which is used as a data entry form and it is instantiated on a window form. When the windows form is closed via clicking on the top right red-X close button, the user control's Dispose method executes. When it executes the load event fires. Here's the dispose method: Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then 'WHEN THE NEXT LINE EXECUTES, the controls Load Event Fires. components.Dispose() End If End If MyBase.Dispose(disposing) End Sub This user control also created instances of some other user controls used as sub-forms. I don't know if this has anything to do with it, but when the user clicks on the red-X close button of the parent form and things began to close, no cleanup code ran to kill the instances of these user controls. I will eventually have the proper cleanup code in place, but right now I want to understand why this load event fires when "components.Dispose()" is called. Thanks. -- moondaddy@nospam.com Tag: Getting the Error Code from the Exception Object Tag: 81204
  - 17
    - Post-Mortem Debugging Does anyone have advice about ways to obtain information about errors that occur in Windows Forms applications at a user site? I am currently sending exception.ToString back to me. I am not distributing the .pdb files for size reasons so I do not get line numbers in the stack trace. I have researched mini-dumps but have not been able to find a good solution for using mini-dumps in a fully managed application. I would appreciate any advice or links to information. Kerry Jenkins Tag: Getting the Error Code from the Exception Object Tag: 81201
  - 18
    - DateTime Bound to TextBox Hi, I have bound a DateTime field in a DataTable to a TextBox field. Other String and Numeric fields are also bound to separate TextBoxes. If a new DataRow is created and a DateTime value is entered no problem. However, after the row is saved, I am unable to clear the date from the textbox. I do not have this problem when binding to a DataGrid. But a DataGrid is far from user friendly and just plain impractical in many situations. In its place I am loading the DataRow into a class and using unbound fields on the form. Bound controls seem great for strings. But thats about it. Does anyone have a better solution? Thanks Tag: Getting the Error Code from the Exception Object Tag: 81194
  - 19
    - Is there any way to stop autoscroll to modify autoscrollpos value hi all am using a panel , now i want to programitally set the thumb of autoscroll. for tht i have override wndproc() and try to set it .. ant it does .. but after that autoscroll too modify value of autoscrollpos .. for ex say i make auotscrollpos to 30 . then after the call is over , it becomes say 40 . wht to do pls help -- amit bharadwaj Tag: Getting the Error Code from the Exception Object Tag: 81193
  - 20
    - How to simply load a freeekin bitmap from a resource? I'm coming over from a background in VC++, and in general I've been pleased with the simplicity of the .NET environment. Not here. I've done google searches on this subject (loading bitmaps from a local resource) and always come up with complex solutions. This can't be right. Everyone packs bitmaps and other graphics and resources, integral to small executables, right? Setting up a local resource folder, loading in graphics, and setting their properties to 'Embedded Resource' would seem to incorporate them, as expected. Then what? It's tough to make 'FromResource' happy. There's got to be some simple solution to this. Tag: Getting the Error Code from the Exception Object Tag: 81191
  - 21
    - Help MDI Child forms move smoothly? Again, I'm writing a smart client application using VB.NET. I've been writing web applications for the last few years and am new(ish) to Windows Forms programming using .NET. I have some MDI forms that move smoothly when being dragged and others that don't refresh/aren't redrawn nearly as well when being dragged. I've no idea what causes the difference in behaviour. Any idea what might cause the latter? Thanks Daft.Geezer Tag: Getting the Error Code from the Exception Object Tag: 81189
  - 22
    - Problem with the scroll position of the Windows panel control Hi all, i am currently developing an application in which i am using the windows panel control. the panel controls contains lots of User controls which are populated dynamically in the same. and also i have set the auto scroll postion of the panel control to true. but the problem is that, whenever i minimize the forms, i just loose my scroll position. the scroll get shefted to the control which has the focus. can any body help me out how can i maintain my scroll position Thanks Vikash Tag: Getting the Error Code from the Exception Object Tag: 81186
  - 23
    - Cannot create dataset with wizard I just loaded vb.net and haven't been able to create a dataset using the wizard. I get the eror message: "There were problems generating dsMyDataset. To resolve this problem build the project, fix any errors, and then generate the datatset again." I'm out of ideas... Tag: Getting the Error Code from the Exception Object Tag: 81182
  - 24
    - Deployed simple C#.NET single form application to Windows server 2003 and the form will not display, but application appears in the the task bar. I have a very simple C#.NET (Framework 1.1) application that is one form with standard .NET controls on it. The application requires a CONFIG file to work. When I install the application to Windows 98/2000/XP, I simply install the .NET framework and copy the EXE and CONFIG files to the workstation and double-click the EXE. This has worked fine for those Operating Systems. When I deployed this to a Windows Server 2000 machine, I just needed to do the same to get it to work (.Net was already installed). However, when I copy the EXE and CONFIG file to the Windows Server 2003 machine and double click the EXE, the form does not display any User Interface (the single form), however, an application block appears in the Task Bar (toolbar that contains the start button and system tray). I do not know what is causing this, and I have no idea how to fix this. I have searched the Microsoft Knowledgebase and googled some searches, but have found no information that has been helpful. I have tried to use the "Microsoft .NET Framework 1.1 Configuration" tool, but no luck. Any ideas or suggestions? Thanks, Roger Tag: Getting the Error Code from the Exception Object Tag: 81169
  - 25
    - ScrollableControl Scrolling by Itself I have a UserControl with AutoScroll set to true. When my application loses then regains focus, the control scrolls itself to make ActiveControl visible. This also happens when I dynamically add or remove child controls. Is there any way to make the scrollbars stay put? Here's some sample code demonstrating my problem. Run the application then scroll down and right as far as possible. Button one will be scrolled out of view and button two will be visible. Switch to another program then come back. The scrollbars will move to make button one visible again. ---- using System; using System.Windows.Forms; using System.Drawing; public class TestScroll { public static void Main(string[] args) { Application.Run(new TestForm()); } } public class TestForm : System.Windows.Forms.Form { public TestForm() { this.ClientSize = new System.Drawing.Size(400, 400); this.Text = "TestForm"; container = new ContainerControl(); container.Dock = DockStyle.Fill; container.AutoScroll = true; this.Controls.Add(container); btnTest1 = new Button(); btnTest1.Left = 0; btnTest1.Top = 0; btnTest1.Width = 50; btnTest1.Height = 50; btnTest1.Text = "One"; btnTest1.Click += new EventHandler(this.OnBtnClick); container.Controls.Add(btnTest1); btnTest2 = new Button(); btnTest2.Left = 500; btnTest2.Top = 500; btnTest2.Width = 50; btnTest2.Height = 50; btnTest2.Text = "Two"; btnTest2.Click += new EventHandler(this.OnBtnClick); container.Controls.Add(btnTest2); } private void OnBtnClick(object sender, EventArgs args) { container.ActiveControl = (Control)sender; } private ContainerControl container; private Button btnTest1; private Button btnTest2; } ---- Apologies if this is a common question. A quick Google search shows that it's been asked before, but I didn't find any answers. Thanks, Ravi. Tag: Getting the Error Code from the Exception Object Tag: 81168

Hi all,

how can i get the unique error code that is associated with each
Exception.

there is one Property of Exception class named HResult. but that is
protected so i can not access it.

How can i do that. if anybody is having any idea than please do inform

Thanks
Vikash

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Re: Getting the Error Code from the Exception Object by John

John
Fri Dec 03 08:51:32 CST 2004

"Vikash Kumar Mitruka" <vikash@nagarro.com> wrote in message
news:327fa0f3.0412030242.2c990353@posting.google.com...
> Hi all,
>
> how can i get the unique error code that is associated with each
> Exception.
>
> there is one Property of Exception class named HResult. but that is
> protected so i can not access it.
>
> How can i do that. if anybody is having any idea than please do inform
>
> Thanks
> Vikash

Vikash, not all exceptions have a unique error code associated with them.
HResult is not useful in the general case.

John Saunders

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