Post-Mortem Debugging

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- Previous
  - 1
    - 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: Post-Mortem Debugging Tag: 81194
  - 2
    - 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: Post-Mortem Debugging Tag: 81193
  - 3
    - 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: Post-Mortem Debugging Tag: 81191
  - 4
    - 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: Post-Mortem Debugging Tag: 81189
  - 5
    - 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: Post-Mortem Debugging Tag: 81186
  - 6
    - 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: Post-Mortem Debugging Tag: 81182
  - 7
    - 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: Post-Mortem Debugging Tag: 81169
  - 8
    - 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: Post-Mortem Debugging Tag: 81168
  - 9
    - find process by processname I wanted to find a process by the ProcessName property, but I discovered that if the executable name changes, the ProcessName reflects that. Is there some way for me to identify a process by something that may not change? Tag: Post-Mortem Debugging Tag: 81166
  - 10
    - prevent Multi line select on DataGrid? How I can prevent Multi line select on DataGrid? Tag: Post-Mortem Debugging Tag: 81164
  - 11
    - Creating VS Studio like control How do you create controls like Toolbox and Solution Explorer that expands OnMouseOver and lsides back when looses focus? Also, it has bookmark. -- Thanks for your help. Harshad Rathod Tag: Post-Mortem Debugging Tag: 81163
  - 12
    - creating VS Studio like controls How do you create controls like Toolbox and Solution Explorer that expands OnMouseOver and lsides back when looses focus? Also, it has bookmark. -- Thanks for your help. Harshad Rathod Tag: Post-Mortem Debugging Tag: 81162
  - 13
    - Setup project and Windows 2000 I have a Windows Forms .NET application that I've built a Setup project for that includes the installation of the .NET Framework and MSDE (using the MSDE Deployment Toolkit). The install & uninstall works fine when the O/S is Windows XP. The installation works on Windows 2000 as well, but the application doesn't appear in the list in "Add/Remove Programs" so that it can be uninstalled. What am I missing? Thanks in advance! Tag: Post-Mortem Debugging Tag: 81161
  - 14
    - Hidding a window and preventing Alt-Tabbing to it I'm trying to hide the main form of my application, as I want all of the user interaction with my application to come from interacting with a notify icon with a context menu in the system tray (which I have working). I've figured out how to hide the form easy enough, set the WindowState to Minimized and ShowInTaskbar to False. What I can't figure out is how to prevent the user Alt-Tabbing to the window, as its still visible in the Alt-Tab menu. I can set the windows FormBorderStyle to FixedToolWindow or SizeableToolWindow and it will no longer show up in the Alt-Tab menu but now it will now minimize to the bottom left of the desktop just showing the windows title bar instead of being completely hidden! Does anyone know of any way to completely hide a window visibly(so no part of the window is visible anywhere), with no icon on the task bar or on the Alt-Tab menu? All I really want is to be able to run a notify icon in the system tray and a context menu for the icon but I'm don't know of any other way to do it other than to run it in a enclosing form. I've been wondering if making my application a service make things easier but I've no experience with programming services and it seems a bit of overkill for what I'm wanting to do! Any advice would be most appreciated! Cheers, Danielb Tag: Post-Mortem Debugging Tag: 81159
  - 15
    - Hello, Japan? My application is so successful that it needs to go global. The only problem is that that means Japanese. I don't know the first thing about making a Japanese language application. I know I have to use Unicode, but that's about it. In case it matters, the user will be presented with a dialog, and he can choose, dynamically, which language it should be rendered in. So, it isn't a matter of linking a particular resource file for Japanese on one machine, and a different one for English on a different machine. Both must be available, based on user choice. Is there a simple "Hello, World" application for the .Net framework, but in Japanese? Or any sample applications that make use of Japanese? I don't even know where to find a Japanese font. Any help would be appreciated. Tag: Post-Mortem Debugging Tag: 81155
  - 16
    - Closing all instances of an application I start up several instances of an application I've written. From one of the applications I'm trying to close all of them, but it's not working. I'm doing this by registering a message and broadcasting it. but when I put a breakpoint in my overridden WndProc, It never seems to get the message. public class frmMyApplication : System.Windows.Forms.Form { public const int HWND_BROADCAST = 0xFFFF; [System.Runtime.InteropServices.DllImport("user32.dll")] public static extern int RegisterWindowMessage(string strMessageType); [System.Runtime.InteropServices.DllImport(strUSER32DLL, CharSet=CharSet.Auto, SetLastError=true)] public static extern int SendMessage(IntPtr hWnd,[MarshalAs(UnmanagedType.U4)] int iMsg, int iWParam, int iLParam); int iCloseAllMessage_m; public frmMyApplication() { iCloseAllMessage_m = MediScript.RegisterWindowMessage("_CloseMyApps"); if (iCloseAllMessage_m == 0) { throw new Exception("RegisterWindowMessage returned 0"); } } protected override void WndProc(ref Message m) { if (iCloseAllMessage_m != 0 && m.Msg == iCloseAllMessage_m) { Application.Exit(); } else { base.WndProc (ref m); } } private void mnuiCloseAll_Click(object sender, System.EventArgs e) { SendMessage((IntPtr)HWND_BROADCAST, iCloseAllMessage_m, 0,0); } } Tag: Post-Mortem Debugging Tag: 81154
  - 17
    - Obtaining system appearance settings. How do I find out what the Systems's appearance parameters are such as the window border width or color? Tag: Post-Mortem Debugging Tag: 81152
  - 18
    - Maximize Hello, I have an application that starts notepad.exe from a button click in VB.NET. I am looking for a way to make the window maximize or minimize from the vb app. Any suggestions (if at all possible, detailed) will be greatly appeciated, Thanks, Chuck Tag: Post-Mortem Debugging Tag: 81149
  - 19
    - GroupBox disables event handlers in the user control it contains. Hi, friends, In my VC# windows program, when I put a user control in a GroupBox, all the event can no longer be handled, for example, DoubleClick. However, if I remove this GroupBox and put the same user control in the Form directly, everything works fine. I do not know what is wrong here. Any ideas? Thanks a lot. Tag: Post-Mortem Debugging Tag: 81148
  - 20
    - Excel Add-In InvalidCOMObjectException On Shutdown Hi Guys, I've created an Office.CommandBarPopup Add-In for Excel that launches a Windows Form as a modal dialog when a button within the CommandBarPopup is clicked. However, when Excel is shut down I am receiving an InvalidCOMObjectException error. This is even happening even though the form has no embedded controls. It doesn't happen if the dialog isn't instantiated. Is there a procedure that needs to be followed when destroying forms from Excel add-ins? Best regards, Jim... Tag: Post-Mortem Debugging Tag: 81144
  - 21
    - Monitor Dial-up Connection I am writing a smart client application that needs to monitor the users dial-up connection status. If the user disconnects, I need to prompt them to reconnect, or quit the application. I tried using the following WMI query wmiDialupDisconnect = New ManagementEventWatcher("SELECT * FROM MSNDIS_NotifyAdapterRemoval") but it does not work. Does anyone have any ideas how I can monitor a users dial-up connection status? Tag: Post-Mortem Debugging Tag: 81143
  - 22
    - Panel & keyboard focus I have a panel and some of my controls on it (each control is derived from Control, not from UserControl). I need to delete the selected control by pressing the Del key. How it can be done? Panel does not process any keyboard events. Also I don't want to delete any controls when focus is on the other controls of the form. So the scenario is something like this: 1. User clicks on some of my controls (panel receives focus) 2. User press Del key (control removes from panel) 3. User press Tab key (the focus is received by another control of the form, but not a control of the panel) 4. User press Del key (nothing happens) So the main question is how can I monitor focus state of the panel and process the keygboard input? Thank you very much. -- With best regards, Mikhail Tag: Post-Mortem Debugging Tag: 81138
  - 23
    - creating instance of a form from a variable Ususally we do like: SalesOrderForm fm = new SalesOrderForm(); where SalesOrderForm is a valid form in one of the assembly, that is SalesOrderForm is a type. How can I create an instance of SalesOrderForm when I do not know its type at run tyme? For example public openForm (string formName) { // here I might get "SalesOrderForm" or something else. If I get "SalesOrderForm" then I want to open it. Here, it will also be NOT known which assembly this for is in. } Thanks. -- Thanks for your help. Harshad Rathod Tag: Post-Mortem Debugging Tag: 81137
  - 24
    - Time of inactivity I have a vb.net application that starts with a login form. I would like to show it again after 5 minutes of inactivity of the application. Now, I use a timer and I start it in the application.idle event, but it doesn't work fine, because it shows the login form every 5 minutes of activity or inactivity of the application, without differences... How can I solve it ???? Many thanks nq Tag: Post-Mortem Debugging Tag: 81136
  - 25
    - DataGridView tab order Hello, I have a DataGridView with several columns. I would like to change the tab order for the columns but I can not find a way to do this. There is no property to set the tab order. I could listen for the tab-keypress but I can not find a method setting focus on a specific cell in the DataGridView. What I really would like to do is to skip a column when using Tab to navigate the grid. Is this possible at all? Cheers, Chris Tag: Post-Mortem Debugging Tag: 81135
- Next
  - 1
    - Showing verbs in a PropertyGrid at runtime I wished to show verbs in a PropertyGrid that is hosted in my own WinForms application. The normal way to show verbs is to provide a IDesigner implementation, however this only works when the PropertyGrid is hosted inside of MSDEV. This is my solution, comments please. using System; using System.ComponentModel; using System.ComponentModel.Design; namespace Main { /// <summary> /// The class enables an object, to display 'verbs' in the property grid. /// It should NOT be used for any object that will be edited with the /// property grid that is in MSDEV. It is only usefull for property grids that /// are hosted in a customer WinForms app. /// /// Override the Verbs::get method in sub classes to return the set of verbs /// for that class. /// </summary> [Serializable] public class VerbHelper : IComponent, ISite, IMenuCommandService { public VerbHelper() { } #region IComponent Members public event System.EventHandler Disposed; [Browsable(false)] public ISite Site { get { return this; } set { throw new Exception("I hope this is never called!"); } } #endregion #region ISite Members [Browsable(false)] public IComponent Component { get { return this; } } [NonSerialized] Container mContainer = null; [Browsable(false)] public IContainer Container { get { if (mContainer == null) mContainer = new Container(); return mContainer; } } [Browsable(false)] public bool DesignMode { get { return false; } } [Browsable(false)] string ISite.Name { get { return "My Name"; } set { } } #endregion #region IServiceProvider Members public object GetService(Type serviceType) { if (serviceType == typeof(IMenuCommandService)) return this; return null; } #endregion #region IDisposable Members public void Dispose() { if (Disposed != null) Disposed(this, EventArgs.Empty); } #endregion #region IMenuCommandService Members public void AddCommand(MenuCommand command) { } public void RemoveVerb(DesignerVerb verb) { } public void RemoveCommand(MenuCommand command) { } public MenuCommand FindCommand(CommandID commandID) { return null; } public bool GlobalInvoke(CommandID commandID) { return false; } public void ShowContextMenu(CommandID menuID, int x, int y) { } public void AddVerb(DesignerVerb verb) { } [Browsable(false)] virtual public DesignerVerbCollection Verbs { get { //override this in a sub class to return your verbs. return new DesignerVerbCollection(); } } #endregion } } Tag: Post-Mortem Debugging Tag: 81133
  - 2
    - Can't import .OCX assembly into Web Matrix Project. Hi, I am using Web Matrix Project as .NET programming environment. Can you show me detailed steps how to import the .ocx library into the Web Matrix Project. I can't seem to be able to import other assembly than .dll, .exe or .mcl . I am pretty new to the .NET programming environment, and may be missing something. I can see the file in C:\Program Files\Common Files\Tops\xyzxyz.ocx , but I can't find a way to import it into the Web Matrix Project to see all Methods and Properties of the assembly. Thank you for any help. Tag: Post-Mortem Debugging Tag: 81130
  - 3
    - create object dynamically hi guys, i just have a doubt about this one... i have several class that just basically do CRUD operations (create, read, update, delete) now for example on my delete function, i want to create objects dynamically based on TableName.. this is my current line of code Public Sub ActionButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Select Case TableName.ToLower Case "employee" Dim o As New BusinessLogic.EmployeeController o.Delete(1) Case "gender" Dim o As New BusinessLogic.GenderController o.Delete(1) Case "more of this on my code" Dim o As New BusinessLogic.[other]Controller o.Delete(1) End Select End Sub now i want to make this line of code shorter, maybe by doing this Public Sub ActionButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Dim o As New BusinessLogic.[TableName]Controller o.Delete(1) End Select End Sub note the [TableName] here is a property i created, so passing a EMPLOYEE as the TableName will Dim o As New BusinessLogic.EmployeeController and then i can call the delete function, just want to load object dynamically here.. i hope i made my point here clear... is it anyway possible? TIA! (if i have 8 hours to chop down a tree, i'd spend 6 sharpening my ax) Tag: Post-Mortem Debugging Tag: 81127
  - 4
    - Mouse event handlers I am writing a 3D graphics demo for my students, and thought I had a really slick solution for handling the interaction with the mouse. There are several ways to interact with a 3D world, and I have attached a mouseDown event handler to my OpenGL panel (control). What I want to do, is based upon which mouse button was pressed associate the proper mouseMove event handler with the control. OK, so I have a From with several controls, including a few OpenGL controls I created. I attached the mousedown to an OpenGL control. In the callback I want to associate the MouseMove and MouseUp event handlers. I first tried something like this in the MouseDown event handler: m_MouseMoveDelegate = new MouseEventHandler( camera.Trackball ); this.MouseMove += m_MouseMoveDelegate; m_MouseUpDelegate = new MouseEventHandler( My_MouseUp ); this.MouseUp += m_MouseUpDelegate; This associates the mouse handlers with the entire Form though, not the control. I am rather clueless on the sender semantics. I tried casting it to my UserControl (OpenGLPanel), but that led to very bad behavior. Not sure why. I also need to retained the mouse position of the mouse down event. The problem above is either the "this" identifiers, or trying to save the mouse position from the mouse down event. Casting this to screen space provides somewhat better behavior, but not ideal. Questions: 1) Is there something fundamentally wrong with this design? 2) Is the sender one of the controls I registered the MouseDown event handler to? 3) In particular, is it the control in which I pressed the mouse? 4) Can I associate a MouseMove event to the sender? Note, I do not want to embed my form logic in here and test for which control, etc. FYI. The mouseUp event simply removes the event handlers: // Disconnect the MouseEventHandler this.MouseMove -= m_MouseMoveDelegate; this.MouseUp -= m_MouseUpDelegate; Tag: Post-Mortem Debugging Tag: 81122
  - 5
    - Getting the keyboard state in MouseMove In my windows app, I have an event handler for the mouse move, and want to allow for constrained interaction using the shift or control keys. I can not figure out how to get the state of the shift, control or alt key modifiers for the mouse. The mouseEventArgs does not seems to have anything, and casting the sender to a control and trying to inquire has led to compiler errors. This functionality exists in the Drag and Drop event args, but not the mouse. How do we determine the key modifiers for the mouse in .NET? Roger Tag: Post-Mortem Debugging Tag: 81120
  - 6
    - Trip to Disney GET YOUR TRIP TRIPS TO DESNEY TRIPS TO HAWAII http://travelexpert2004.us http://travelexpert2004.biz http://gotraveling85.us Tag: Post-Mortem Debugging Tag: 81119
  - 7
    - paper size and font for roll paper Hi I designing a report with Crystal (C#, winforms), my problems is how to set the paper size for the width of the roll 3 inches and tall continuous large. 2.- There is only 40 char columns and monospace font, how to I set the designer area for that purpose. TIA Tag: Post-Mortem Debugging Tag: 81118
  - 8
    - How can I custom draw a window title bar Hi All I've tried without success on google and google groups to find the answer to this, but without success - but I do recall it being discussed... In my application, if I want a slightly modified Title Bar on some forms - eg so that it is coloured yellow rather than using the system scheme, is there a way that I can do this? I know I could do FormBorderStyle = None, and draw my own window including my own title bar (lots of references how to do this). But I don't want that (well if it's what I have to do, then I guess I will!) I just want a standard title bar with a different colour. Any ideas? Nigel Armstrong Tag: Post-Mortem Debugging Tag: 81117
  - 9
    - how to drag from RichTextBox? hi all when i drag from my RichTextBox to any other control in windows, it works nice. however, if i mark it as 'readonly= true' then it does NOT work. that is, on the first drag operation. in the second drag operation and all proceeding drag operations, it works nice. however, this is only true if i set the RichTextBox to be 'readonly= true' at runtime. if i change it to be 'readonly= true' at design time. IT NEVER EVER allows drag to succeed! this seems to me to be an authentic bug in the dot net/ visual studio. has someone else experienced this problem? is there work-around? assaf Tag: Post-Mortem Debugging Tag: 81116
  - 10
    - Round Number Function Hi, Round Number Function You can download a small example: Watch and copy examples of Source Code in VB.NET yulyos4vbnet@yahoo.com http://www.geocities.com/yulyos4vbnet Have a nice day From: yulyos@yahoo.com http://www.geocities.com/yulyos Development and writing software programs Tag: Post-Mortem Debugging Tag: 81111
  - 11
    - Dynamic Properties. What the point? I have been playing around with the "Dynamic Properties" of the controls and for the life of me, I can't figure out why would anybody care about using feature. It looks like the only things that this feature does is store and retrieve values from the app.config file! The thing is that, there is already a way to do this during runtime!! In fact, that's what happens once the app starts running under "Windows Form Designer generated code"!! Other than just some kind of time saver (arguably) is there something that I am missing here, is there some big benefit on using this feature that I don't know about? Thank you. Tag: Post-Mortem Debugging Tag: 81110
  - 12
    - Unresponsive UI during lengthy processing Ok, I'll admit it, I'm a winforms newbie. I'm writing an image processing program that, by its nature, gets into some fairly lengthy processing cycles. As long as I don't touch the UI while it's working, don't alt-tab away and come back, don't minimize and restore--in short, as long as I sit there like a dope waiting for the processing to be completed, things are fine. My UI updates itself at the right times with progress bar updates, updates to the PictureBox control that has the image in it, and even updates to a RichTextBox that shows some debugging type output. But the second I do anything at all (even just dragging the window around), the entire UI stops showing any updates. If I bring some other app on top of mine and then bring mine to the front, it doesn't re-draw at all, leaving me with an empty white box where my UI should be. Obviously, this is irritating as heck because frequently I'd like to be doing other things, like checking my e-mail and stuff, while my program is working. I realize that there is probably some general principle of writing winforms apps so the UI stays responsive no matter what the rest of the app is doing, but I'm cluless as to what it might be. Worse, being new to windows programming in general (having finally taken the plunge out of the crusty world of the command line app), I have no idea what I should be searching for in the Visual Studio documentation. Any hints, even just a pointer to the relevent docs, would be greatly appreciated! Thanks. Tag: Post-Mortem Debugging Tag: 81105
  - 13
    - XML editor component Hi Im planning to develope a open source editor for editing some special xml files. I guess its quite a task (read time-consuming) to develope my own xml editor from scratch. I need tag highligtning, endtag autocomplete and just plain texteditor capeablities. Anyone know of a free xmleditor component with source code wich Ican use as a starting place? (The product will remain open source of all time) The next best thing would be a tutorial making such an editor...or hints, suggestions and best practices. Looking forward to hear you suggestions Regards Anders Jacobsen, Denmark Tag: Post-Mortem Debugging Tag: 81103
  - 14
    - Convert ascii code to string I am working on an app that is receiving hex numerical values via serial connection. I am now to the point that I have converted each byte into its ascii code value. Could comeone please tell me how to convert 48 to 0, 49 to 1, etc? I need to display this in a textbox. Thanks in advance for any and all help. -- Message posted via http://www.dotnetmonster.com Tag: Post-Mortem Debugging Tag: 81100
  - 15
    - DataGrid with auto live update? Hi all, Working with dataset and datagrid in disconnected mode may improve scalability. However, this means that multi clients instances are viewing 'out of date' local copies if changes were made by someone else to back end database. In situation where I need a datagrid to auto refresh, synchronize to back-end database, without having to a refresh button, so that all users may see what have been changed, in datagrid. What is the best approach? Thanks. Tag: Post-Mortem Debugging Tag: 81098
  - 16
    - Which Group for Webforms Can anybody tell me which is the most appropriate news group for questions on Webforms rather than Windowsforms? Many thanks. -- Jeff Gaines Damerham Hampshire UK Tag: Post-Mortem Debugging Tag: 81097
  - 17
    - DataBind DBNull Image I am using forms databinding to show an image in the database in a pictureBox. To do this I am handling the Format event to convert the byte [] to a bitmap: Binding bind = new System.Windows.Forms.Binding("Image", this.dataSet1, "Employee.Image"); bind.Format += new ConvertEventHandler(Image_Format); private void Image_Format(object sender, ConvertEventArgs e) { if (e.Value is System.DBNull) { /// How do we handle the DBNull??? return; } // e.Value is the original value Byte[] img = (Byte[]) e.Value; MemoryStream ms = new MemoryStream(); ms.Write(img, 0, img.Length); Bitmap bmp = new Bitmap(ms); ms.Close(); // Writes the new value back e.Value = bmp; } My problem occurs when the value in the database is NULL. if I don't do anything then I get an Invalid cast from System.DBNull to System.Drawing.Image. I also tried : e.Value = (Bitmap) null; but i get a memory exception Thanks Jeronimo Tag: Post-Mortem Debugging Tag: 81091
  - 18
    - Data Find Row and Databinding I have create a form that is databound to a dataset. I am able to move through the dataset by using the BindingManagerBase.Position. However, I need to be able to jump to a specific row in my dataset. I am finding the desired row in the dataset by using the Find Method in the DataRowCollection but don't know how to set that row to be the current row used by the BindingManager. Thanks, Jeronimo Tag: Post-Mortem Debugging Tag: 81090
  - 19
    - Selecting ListView item with Windows Message Hi, I'm trying to select all listView items with SendMessage API function and LVM_SETITEMSTATE windows message ... hWnd = listView.handle; index = -1; ... LVITEM lvItem = new LVITEM(); lvItem.mask = LVIF_STATE; lvItem.stateMask = LVIS_SELECTED; lvItem.state = LVIS_SELECTED; IntPtr pointer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(LVITEM))); Marshal.StructureToPtr(lvItem, pointer, true); SendMessage(hWnd, LVM_SETITEMSTATE, index, pointer); Marshal.FreeHGlobal(pointer); ... but this code doesn't work as it should... it selects all items for a short while, but only after I click ListView control with my mouse which of course move selection to the item I click on what can be wrong? (please do not suggest other way of selecting items - I want to do that with LVM_SETITEMSTATE message) Tag: Post-Mortem Debugging Tag: 81082
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  - 23
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  - 25
    - Custom double buffer Hi I've got some problem doing double buffer. Here is my problem: I've got custom control on which i paint some data (chat messages, lets call it ChatControl), this control is puted on a scrollable panel. Of course i've set right styles on a ChatControl: //styles this.SetStyle(ControlStyles.AllPaintingInWmPaint, true); this.SetStyle(ControlStyles.DoubleBuffer, true); this.SetStyle(ControlStyles.UserPaint, true); this.SetStyle(ControlStyles.ResizeRedraw, true); Everything is ok,but i've got some performance problems. Chat messages arrived in every 5 seconds, and i call on ChatControl Refresh(), so my OnPaint method is called - and thats ok. But control is repainted more times than on in every 5 second refresh: user used scroll, or something like that. And now i want to made some additional double buffer, because i want to draw remembered graphic (thru bitmap), than draw it again - because its neccesery when i only refresh control. I know i should do something like this: Bitmap bmp = new Bitmap(this.ClientRectangle.Witdh, this.ClientRectangle.Height); Graphics g = Graphics.FromImage(bmp); and than i should draw on g but there is a "small" problem - beacuse i know control size after i draw something (thats depends at chat messages count)! so how i can get a bitmap from my base graphics or how to create bitmap that will resize automaticly to my graphic size ? Or .... maybe somebody got any idea? regards kuba florczyk Tag: Post-Mortem Debugging Tag: 81067

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

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Re: Post-Mortem Debugging by Sijin

Sijin
Wed Dec 01 02:55:50 CST 2004

One small piece of advise. Instead of sending exception.ToString(), it
would be helpful to you if you sent exception.StakTrace, that will give
you more contextual info.

You can look at these two solutions for Logging, they might be of help

Exception Management Application Block
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/emab-rm.asp

Log4Net, open source logging library
http://logging.apache.org/log4net/

Sijin Joseph
http://www.indiangeek.net
http://weblogs.asp.net/sjoseph

Kerry Jenkins wrote:
> 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

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