DataGridView.CellValidating event problems

Windows Forms General

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    - detect user inactivity (idle, timeout) OK, So I found Spy++ in the c++ tools and found that the PDF and WEB activex controls on a form have a PID corresponding to the Adobe AcroRD32.exe, which makes sense. After another hour searching the internet I find there are three types of hook: A system hook allows you to insert a callback function which intercepts certain Windows messages (e.g., mouse related messages) . A local system hook is a system hook that is called only when the specified messages are processed by a single thread . A global system hook is a system hook that is called when the specified messages are processed by any application on the entire system . I guess I either want a global hook, or a way to find the PID of the background acroRD32 and monitor that. M. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - FORM CLOSE ISSUE I cant tell what triggers your form1 to close, you could put some breakpoint and step through the code to see what's going on. it looks like something else is causing form1 to close to me. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - How to Refresh controls quickly?? Hi.... No, I'm not creating any new controls at runtime. As I said earlier.... my form contains may controls and ofcourse depending on the values entered by the user, there are some database operations for which I used the Background worker component. I thought, the database operations (reading values from the DB based on the values given in the form controls) may cause this delay and so I used the Background worker component. Yet the delay in refreshing the controls is not reduced. How can I minimize this and quickly refresh the controls of the form Pls help me out.... Thank you. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - VB: How to toggle the windowstate (minimize-to-normal) of a borderless form when clicked on the taskbar? And that's why forums are special. Please don't hesitate to mark my post as the answer. That's what keeps me coming back. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Extended OpenFileDialog Hi everyone, I'm trying to make a custom OpenFileDialog that select files and folders, the original one just returns the selected files even if I select files and folders in the dialog. So my ideia is to make a custom usercontrol to allow the openfiledialog to return both selected files and folders (once the dialog allows selecting folders maybe I can return folders to) This is an ideia but I don't know if this is possible and if is, how to handle the ok button click event. Any help appreciated Cheers Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - MDI form - menu of child forms (MdiWindowListItem) - restrict entries ? I would like to restrict the menu of MDI child forms (MdiWindowListItem) to only a subset of the current children. Is it possible for an MDI child form to choose NOT to register itself with the MdiWindowListItem menu Can I manually remove unwanted entries from the menu Or, is my only option to forego the automation of the MdiWindowListItem facility and build the menu myself PS this menu shows, by default, the Text property of the child form - can I set this to anything else Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Is DataBindingComplete the proper place to add user columns Hi, I need to add some columns to my table so that I can use the maskededitcolumn control. I am doing this is the DataBindingComplete event handler. Is this the proper place A second question is I have noticed that the DataBindingComplete event gets called many times. Can someone define under what conditions DataBindingCompleted is fired Thanks, Jerry Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - finding the monday date of a given date In sql I can find the monday date of any given date with the following select DATEADD(wk, DATEDIFF(wk,0,getdate()), 0) I need to rename the header text of 30 col to be the monday date for the prev week, this week, this week+1, +2..... this week +30 but there is no week value for an interval please help Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - exporting button images Surely I am referring to other application with source code provided or output of wizards. E.g. wizard with toolbar buttons allowing to add/remove/edit data in a datagridview generated in Visual Studio. I understand that I may cut rectangle button areas after screen image is pasted into MSPaint and etc... , but is there other way Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Progress Bar - Controlling From a Class I decided to ty the BackgroundWorker method. That's made for a fun afternoon. If I put all the code on the form, I can get the BackgroundWorker method to work from the sample code from http://msdn.microsoft.com/vstudio/tour/vs2005_guided_tour/VS2005pro/Smart_Client/AsyncTasks.htm However, I can not control the progress from inside the class code. Code Snippet Here is the code that is on the form: // This event handler updates the progress bar. public void backgroundWorker1_ProgressChanged( object sender, ProgressChangedEventArgs e) { this .progressBar1.Value = e.ProgressPercentage; } public void backgroundWorker1_DoWork( object sender, DoWorkEventArgs e) { BackgroundWorker worker = ( BackgroundWorker )sender; System. Random rand = new Random (); int max = rand.Next(50, 500); for ( int i = 0; i < max; i++) { // Cancel upon cancellation requests if (worker.CancellationPending) { e.Cancel = true ; break ; } else { worker.ReportProgress(( int )i * 100 / max); } } // Pass up the number of iterations perform to the main thread e.Result = max; } private void backgroundWorker1_RunWorkerCompleted( object sender, RunWorkerCompletedEventArgs e) { if (e.Error != null ) MessageBox .Show( this , "Background processing completed with errors: " + e.Error.Message, "ERROR!" ); else if (e.Cancelled) MessageBox .Show( this , "Background processing cancelled." , "Cancelled" ); else { Single elapsedTime = ( int )e.Result * 30; MessageBox .Show( this , "Background processing completed in approximately " + elapsedTime.ToString() + " milliseconds." , "Complete" ); } } Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Saving and restoring Windows form states I'm developing a windows form application which allow users to query the database. When users press the reset button, the windows form will go back to the initial state(resetting all the controls in the windows form to initial state) I've thought of the followings to achieve this 1) Put all the resetting codes inside the reset button event. 2) Use serialization 3) Close the windows form and create a new windows form. But I think there may have some better ways.Can anyone advise me Thanks Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - MDI and OutOfMemoryException Hi, I have this code that makes the form as an MDIChild: chartWindowController.GetForm().MdiParent = _expertTradeMainFrm; chartWindowController.GetForm().WindowState = FormWindowState.Normal; chartWindowController.GetForm().Show(); The above code snippet throws exception when Show() is called: Message "Object reference not set to an instance of an object." StackTrace " at System.Windows.Forms.ToolTip.CreateHandle()\r\n at System.Windows.Forms.ToolTip.get_Handle()\r\n at System.Windows.Forms.ToolTip.WmWindowPosChanging(Message& m)\r\n at System.Windows.Forms.ToolTip.WndProc(Message& msg)\r\n at System.Windows.Forms.ToolTip.ToolTipNativeWindow.WndProc(Message& m)\r \n at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)\r\n at Microsoft.Win32.SafeNativeMethods.MessageBox(HandleRef hWnd, String text, String caption, Int32 type)\r\n at System.Diagnostics.AssertWrapper.ShowMessageBoxAssert(String stackTrace, String message, String detailMessage)\r\n at System.Diagnostics.DefaultTraceListener.Fail(String message, String detailMessage)\r\n at System.Diagnostics.DefaultTraceListener.Fail(String message)\r\n at System.Diagnostics.TraceInternal.Fail(String message) \r\n at System.Diagnostics.Debug.Fail(String message)\r\n at CimsFramework.CimsSecurity.CmsUsrDataSheetSubModule.GetDataEntryInfo() in D:\\CIMS.NET\\CimsFramework\\CimsSecurity.cs:line 4127" But when the same is not a MDIChild then it works fine i.e., if I comment the line chartWindowController.GetForm().MdiParent = _expertTradeMainFrm, then the application works fine. I have Visual Team Edition 2005 for Developers + Windows XP Sp2. Can anyone let me know why this is happening or how to fix it. Thanks in advance. Regards Kiran Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Authrntication and Clickonce Hi all, I'm trying to use the clickonce technology to install my application. I put the publish directory in my IIS web server and every thing is OK. But, not every one can get the link of the publish and install my application on his PC. Is there away to do the downloading using authentication with username and passowrd. Regards... Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - TreeView under Windows 98 I have had this problem also a few months ago. The tooltip of treeviews gives junk characters (or squares), and after a while, the application even crashes! No idea what the cause is, in the meanwhile I disable tooltips on treeviews when software runs on Win98 machines. Must be a bug in .NET. The COMMCTRL32.DLL is good, because other applications have no problems, only C#.NET apps. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Draw on another display I have an application in which I would like to play a video in full screen on another display. I am able to list all connected display devices using the System.Windows.Forms.Screen class, and I have no problem playing a video in full screen using Microsoft.DirectX.AudioVideoPlayback.Video. However, I am unable to figure out how to display this on another monitor. I am fully aware that I will likely have to create a form on the second display and play the video from there, but as far as I can tell there is no way to do this from the Screen class. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - GDI+ button image painting problem I am pretty sure the BitmapToGraphicsPath routine is going to kill performance. Iterating over every single pixel in a bitmap is slow and then creating a path from that is also going to be slow. Painting using a graphics path is also a slow performer so the combination is real bad. Try removing that routine and see how much it improves the overall speed. Then come up with an alternative way of doing whatever it is you are trying to do. Phil Wright Free user interface controls for Windows.Forms http://www.componentfactory.com Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Syncronize scrolling of 2 dataGridView's in C# This is exactly what I needed, thanks very much! I don't know how I missed that property when I was going through the list Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Find Target and Change Icons buttons are disabled for desktop Shotcut of my application Dear All, I have made a setup of a C# window application in which i create an icon on the desktop. But the problem with this shortcut is that whenever i right click on it & go to property, its Find Target and Change Icon buttons are disabled. The difference that i have observed between other standard applications shortcuts and this one is that its Target Location on the property page is not set which are set for other ones whereas Target property just points to the name of the application. Please guide me as soon as possible so that i could solve this problem. Regards, Wasif Ehsan. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Using IMenuCommandService Thanks Ken, I sent you an email. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - C# How do I keep GroupBoxes seperate? Hey John, No worries here is the example... UserControlHideInsteadOfGroupBox.zip Doesn't do very much but hopefully it will give you an idea of the alternative approach. You might not know much about User Controls. User controls are just like a subform on which you can create a reusable set of controls. Say for example you have two forms that require the same data entry but each form uses the data differently and displays different results. Instead of adding each of the data entry controls seperately on each form (embedding some duplicate logic also) you create a user control containing the data entry controls and share it between forms. Thats the idea behind them but that doesn't mean they aren't useful in other scenarios and I believe this situation is one of those cases. In the example there are two user controls AC and DC inputs, on the form there is a panel, this acts as a placeholder, when the radio button is clicked for AC the AC user control is loaded and displayed (this user control would contain the data entry for AC). Very simple code but it removes all sorts of logic in hiding textboxes, labels, and any other controls. Hope this approach proves useful. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Add Datagridview On Combobox Hi, it's amazing stuff. Thanx... it;s very helpfull Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - error during runtime of usercontrol Hi, JessinErin, I am sorry that I made a mistake. As they got a "Get not supported at runtime", they are write-only instead of read-only. You can try to comment the lines of "Get" segment to check if the error appears again. And if possible, please post all the lines related to m_Belt_Width. Hopes this helps, Regards Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Using XML as a file-type database in WinForms applications Sorry, I think I have confused issues a bit. When I referred to Multi-users, I didnt mean multiple users at one time...purely users for each windows account...IE, setting "User Instance=True" like in SQL Server 2005 Express Can SQL Server Compact Edition support this Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Implementing SnapLines at RunTime Hi Guys We are in the process of developing a graphics design package using VB.NET 2005. The SnapLines feature in the IDE is excellent and it's the sort of feature we want to implement to align boxes etc automatically. My question then is does anyone know how to implement the SnapLines functionality at RunTime Many Thanks Darm Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Get properties of Form from thread Solution in thread.cpp #include "thread.h" #include "Form1.h" using namespace pag34; void MyThreadPrue::VentanaX(System::Object ^name) { Form1 ^ob = (Form1^) name; for ( int i = 0; i < 100; i++) { Thread::Sleep(100); ob->label3->Text = i.ToString(); } ob->label3->Text = L "END" ; } Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - How do I have richtext dublicate in a new tab? Ok, I am trying to make a scripting editor in C# and I want my editor so you can create a new tab and have a "new" rich text area on it. I don't want my richtext that you already made move to a new tab. So if someone can tell me so if I can disable the richtext from moving and just create a new one on the new tab please tell me! Code: Code Snippet private void newTab(object sender, EventArgs e) { if (rtb != null) { tabPage1 = new TabPage("Untitled"); tabPage1.Controls.Add(rtb); tabPage1.AutoScroll = true; rtb.Dock = System.Windows.Forms.DockStyle.Fill; this.tabs.TabPages.Add(tabPage1); rtb.Multiline = true; rtb.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.ForcedBoth; rtb.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); tabs.SelectedTab = tabPage1; } } Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Drawing on[/underneath!] Controls Yes, that would work. Very similar to what you did with the transparent form. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - How to store a pdf, excel, or word document into a sql database as attachment Can someone show me a example how to store a pdf or document like excel into a sql database. Im using vb 2005 and sql 2005. thanks for taking the time to read this. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - report generator Hello there, I work with Visual Studio 2005 Pro and C# 2.0. What is the best report generator Thanks in advanced, CLA. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Showing blank textbox for int and double datatype properties in propertygrid Hi, Propertygrid shows 0 bydefault for int and double datatype properties. So is there any way to show blank textbox in propertygrid for the properties with int and double datatype as it comes for string datatype properties if default value is empty. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - HI!!! well is there any way to load a custormise bitmap on a form!!!!!!!!!!how to make its background transparent!!! Check this thread for a way to use Bitmap.MakeTransparent(). Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms
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    - Deployment Installer issue/problem Have you found the fix to this problem I have the same issue with my VB.net 2005 project. Tag: Windows Forms General DataGridView.CellValidating event problems Windows Forms

WineNCheese

I am having many problems with the CellValidating event. In many cases while editing cells and focus is moved elsewhere in the app (other focusable controls), the CellValidating event does not fire. Since this is the only means I know of by which to capture the leaving of a cell being edited so I can validate, I'm stuck. Do I need to go get a 3rd party grid Or write my own (again)

Thanx

WNC

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Re: Windows Forms General DataGridView.CellValidating event problems

Zhi-Xin Ye - MSFT

This is strange, the CellValidating event should work, could you provide the steps to reproduce this problem

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Re: Windows Forms General DataGridView.CellValidating event problems

WineNCheese

The situation is fairly complicated. I don't think I can come up with a simple environment that reproduces the problem. I have many custom controls, most inside a few levels of custom container controls. If there are no known problems, I will just have to dig deeper...

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