Hi Guys, I'm creating one or more dynamic datagrids in a form. I have attached a contextment to the datagrid. On selection of one menu item I want to get the first colum's value of the selected row. How to I do that? thx for ur help John ...more >>

I've got a pretty standard menu at the top of my main form, and the MenuItem's have event handlers for the "Select" event to update the statusbar text, but what I can't seem to find is a way to know when the user has cancelled the menu without clicking anything so I can clear the statusbar t...more >>

Hi, I'm using Windows.Forms.TreeView control (.NET Framework 1.1). When a user select a a node from the tree, the text of the selected TreeNode object is displayed in a Bold font. The problem is that when the text is displayed in Bold font some of it dissapears. It seems as if the space al...more >>

All - How can I tell / extract the name of the sub or function that is = creating an error? I'd like to extract this so I can write an event and = include the sub name in the error text without having to go to every = error handling statement and adding the sub as a string. Thanks, Brian...more >>

Hi, I want to select the directories instead of files using the Open or Save file dialog boxes. Is it possible to simulate this? thanks vinod...more >>

Would there be a problem if I set the ColorDepth of an image list to 24 or 32 bits? It seems to be working OK in my computer but I am wondering if other people will have a problem. I am going to assume that you would have to have a very old computer to not support these color depths, is...more >>

The grid has rows but you can't see them. You see the grid but all rows are completly blue but when you click on a column in the row you see the text that is in the row. I sprinkled datagrid.refresh and application.doevents around but it did not help. It seems like it's memory or video card relat...more >>

I've got a simple winform app written in C# that takes almost 5 seconds to start after a reboot. The from was previously written in VB 6 and took less then 1 second to start. I've tried NGEN but it didn't seem to make a difference. Has anyone been able to solve the slow first launch problem...more >>

Good Day, Gentlemen: I've been tasked with creating a screen that allows users to double-click items from list of filenames. Each filename in the list corresponds to a PDF file. On double-click, the corresponding PDF file should be displayed. The catch is that the PDF viewer needs to be...more >>

We are trying to rebuild a current Access 2002 (XP) mdb program to VB.NET with a SQL database - we are having problems with a suitable combobox. There are many threads discussing multiple column comboboxes in .NET. We are having success with the multiple columns similar to the combobox from ...more >>

I've written a C# Windows Forms application. Now I've decided that it needs to check that the user is a member of certain groups as it's opening and close if they're not. A bit of research suggests that I won't be able to close the application before it's finished loading. this.Close() doesn't...more >>

Hi, I have a DataGridRow which i fill with data from a DataAdapter. Now when the user selects a row in the grid, how do I find out which row datarow in the dataset is "selected"? I got this to work in asp.net 1.1 fairly easy, but how do i do it in winforms 2.0? I know I can just use Sele...more >>

normally with a menu i use a simple switch statement. i'm thinking this is not a very good way of doing it. does anyone have any suggestions on a better way -- Message posted via http://www.dotnetmonster.com...more >>

How to position message box programatically using C# .NET? Thanks. ...more >>

When I use the DataSource property of a ListBox or ComboBox, there is always a selected item. When I bind the control, I don't want anything selected. I have tried using the .SetSelected() method, setting, selectedIndex to -1 (twice in a row, blah blah), setting SelectedItem to null, etc. l...more >>

Create a new Windows project and a button on it, on the click event of the button add the following code: Cursor.Current = System.Windows.Forms.Cursors.Cross; Run the project and click on the button, It was my understanding that the cursor should change but it does not, it only changes as ...more >>

Hi All, I have created a radio button that uses images instead of the silly "circle" for a touch-screen kiosk application where users will have to use their large fingers to select radio buttons. For some reason, however, I can not get the damn thing to stop flickering! Would anybody (with ...more >>

I just noticed a very bizarre situation. In Solution Explorer, some of my forms did not display their forms icon, but rather a class icon. (This particular solution is under VSS control.) Therefore, I cannot see the form in the forms designer. Most of the forms are inherited from FormBase, whic...more >>

Hello, I am having a problem on a a PC where it throws an unhandled exception in in a embedded control in IE. The exception is a System.ArgumentException and I cannot even catch it to find out where it is coming from... I have a try..catch in loading the control, so that should catch all ...more >>

After inserting a new data row to a DataTable that is bound to a datagrid, I am unable to change data in a row that is after the newly added row without getting bizarre results. I have added the full code for the test below. Create a project drop in the code and run. Any help would be a...more >>

Hello. Why in PropertyGrid dont fired my event handlers on mouse and keyboard events? Is it bug or legal behavior?...more >>

Hi, Does anyone know any way to find what control is under the mouse pointer? In my application (MDI forms application) I need to track mouse move events and find what control is currently under the mouse, it can be MDI child form, button, label, etc. Maybe some Win API function which finds ...more >>

Hello, I am developing a C++/CLI winforms application. In Outlook 2000 and 2002 there is vertical bar on the left hand side which allows the user to switch between modules (Mail, Calendar, etc). 1. Is there a similar control for .NET that comes close to that? Or 2. Whats is the best wa...more >>

Originally, I thought this was due to DoubleBuffer, but ran some further experiments and discovered that page faults occur when calling DrawImage(). For example, create 2 images about 800x800, then call DrawImage to copy from to the other (on say a mouse click). Notice about 600+ page faults occu...more >>

Hello, I guess the subject line says it all. Does anyone know why this restriction exists? It does seem rather arbitrary. Also, can the helpbutton's behavior be mapped to another button, like one in a toolbar? Can the question mark cursor be invoked other than by clicking on the help ...more >>

I have a problem with the RichTextBox Control. I need to catch CUT and PASTE (on ctrl+X and Ctrl+V). So I subclassed RichTextBox, and overrode WndProc looking for WM_PASTE and WM_CUT (0x0302 and 0x0300). But I don't get these messages on Ctrl+X or Ctrl+V. If I subclass a TextBox, I catch t...more >>

I've spent several hours on Google and founds 100's of entries that get close to the answer, but can't quite get there. I'm creating an component that acts as an ExtenderProvider for other components. One of the properties that it exposes is a class I've created that itself has a number of...more >>

Is there anyway to get a thumbnail of a file similar to the way explorer does that can be used in an application? I want to for example if i drag a file over a picture box, if it has the ability to have a thumbnail, show it in the picture box. thanks! ...more >>

I am working on a custom DataGridColumnStyle that can host a UserControl. I have created a public property on this ColumnStyle of type MyUserControlBase. I would like to be able to set this property in the PropertyGrid by choosing from a list of UserControls that inherit from MyUserControlBa...more >>

Hi, I'm trying to access listview control in a VB application from C# application. Follwoing is my code StructLayoutAttribute(LayoutKi=ADnd.Sequential)] public struct LV_ITEM { public UInt32 mask; public Int32 iItem; public Int32 iSubItem; public UInt32 state; public UInt32 stateMask; ...more >>

Hi, I notice that my app (with a double buffer form) throws TONS of page faults whenever it refreshes. I googled, and found the same complaint on GotDotNet. Does anyone have any info on this, or could at least get this in the BUG QUEUE! Thanks, Steve Serious GDI+ bug on VS 2005 ...more >>

I'm writing a winforms app in vb.net 1.1 and have an issue when users click the enter key on a textbox. It make a beep sound as if an error had occurred. how can I turn off the beep sound? I'm actually trapping the key up event and when the user uses the enter key I do something. Any good ...more >>

I have an multi-form application, which uses owner drawn buttons that use bitmaps. I switch between forms using: public void ActivateForm(FormBase form) { if (form == this.activeForm) return; form.Show(); form.Enabled =...more >>

I'm going to start a windows-form application ,but I am not very familiar with techniques in windows-forms.I'm an ASP.NET developer and pretty familliar with a lot of things like user controls,Framework and libraries around.I was thinking about strating with a sample to design the UI of my a...more >>

Is it possible to use the UIP block with an existing form not derived from WindowsFormView? For example, can I place controls derived from WindowsFormControlView onto a custom dialog and have them managed by the UIProcess classes without having the dialog itself derived from WindowsFormView...more >>

My app uses PrintPreviewDialog to allow the user to preview and print. If the user selects print from the toolbar, and the current printer settings are set to print to a file, a "Print to File" dialog asks them to enter a filename. If at this point they press Cancel, they get an unhandled ...more >>

Is there any way programatically change the scrollbar width and thumb size for any of the standard windows forms controls (ListBox, ListView DataGrid etc) without having to set the system wide settings in Control Panel ? I'd prefer not to have to do an owner drawn scrollbar, because you then ...more >>

hi all, I encounter problems when calling Form.ShowDialog() in a ComboBox.SelectedIndexChanged-EventHandler. After the EventHandler is executed a SEHException is thrown. This only happens if EnableVisualStyles was called (see sample code). Is this a known problem? is there a workaround oth...more >>

Hi! Does anybody know why ListViewItems aren't allowed to get StateImageIndexes that are greater than 14??...more >>

Hello. I need to create a Kiosk style program using VB.Net. I have maximized the window, set the window style, etc. I need to know how to trap all keyboard events so that the user cannot access anything outside of my app. Does anyone know of a good resource that demonstrates how to do ...more >>

Hi, is it possible to make the MDI Parent form transparent and set the child form opacity to 100%? thanks Henrik ...more >>

I have written an app that uses the MSComm ocx, the .NET IDE creates a Interop.MSCOmmLib.dll wrapper. I copy the executable and the wrapper to the client machine, but the application fails to run, presumably this is because the MSComm ocx is not registered on the target machine, my question i...more >>

I need to be able to force a form or control to render itself to a graphics bitmap instead of (or as well as) the screen device. This is not the same as basic capture/print screen functionality. It would almost have to emulate a screen or something... I feel some nifty APIs would probably d...more >>

HI I am working on a ASP.Net web application. I have to build a windows service which will have functions that returns Current Systems CPUID etc... I need to consume this Windows service with my ASP.Net web application. How can I do this? Is it possible to do so? thanks in advance... ...more >>

I'm using .NET 1.1 and need my forms to maximize and minimize as fast as possible, without the standard window dragging that usually occurs. Does anyone know a way to do this? Also, how can I make a form the foreground window on the desktop? ...more >>

Hi, I have an array of items, each having an image and description. I would like to programatically copy them all to the clipboard (for pasting into say a Word document). I've tried the following code, thinking SetData keeps appending info to the clipboard, but when I paste into Word, I only g...more >>

Hello, Is it possible to do, to get to the control by its name dynamiclly. ASP.NET has .FindControl("") method to do that, is there a similary method in winforms. Thanks....more >>

I have a .Net Winforms control which is hosted inside of IE. Most of my users are WinXP or Win2K but I have one user using WinXP Home Edition SP2. When he accesses the control, the control won't even download, he just gets the "missing image" icon. I checked the Gac with gacutil /ldl and th...more >>

Hello, I'm trying to get the "about to be used" directory from an Open/Save file dialog. I'm not talking about InitialDirectory (which only seems to be useful if you are setting it) but the directory whose contents will be displayed when the dialog is shown if InitialDirectory is untouche...more >>

I retrieve data from sql dbo and place within a dataset datatable using a simple select statement. One of the fields is nullable and the data returned may be null. When I use IsDBNull(dr.("fieldname")), the check fails because the actual contents are the characters "<NULL>". I can check the st...more >>

I recently tried my windows application on another PC and it crashed with an exception because one of the fonts (specified within GDI+) was not installed on that PC. My question is : rather than change the font to one of the standard windows ones, could I actually embed the font into the co...more >>