From what I understand, in AsP.Net apps, you can use/mix multiple language files. Is this also possible in Winforms? for example, if I have a VB.Net project, and find some online C# code that I want to use, is it possible to add the C# code into the VB.Net project? ...more >>

I have a WinForms app, with each forms having many Text-boxes that bind to a DataTable. Associate with each Textbox would be a (text) label. Is there any simple way such that I can "bind" the Text labels to the TextBoxes, so I can dynamically set each Label.Text property rather than having...more >>

I've only done web apps in the past, and now need to add security (user authorization) to a c# windows forms app. We've created an AD group for users who should have access. For a web app I'd add an <authorization> section to the web.config. I can't find examples of this using my app.config fi...more >>

Hi there, I am using the PrintPreviewDialog control to print a document. Pages get added on the PrintDocument_PrintPage event using HasMorePages=True and this way a print document is created, with all my pages (11 in this case). The preview shows all 11 pages of this particular print doc...more >>

So, is Winforms able to use the same Membership/Roles scenario that ASP.net does? can someone point me to a location that shows how to implement this? ...more >>

In my .net application I use Windows.Forms.DataGrid bound to the datasource to dispaly database contents. The bounding is done with GridColumnStyle and its property MappingName which is associated with the name of a DataTable column. Moreover the Format property of GridColumnStyle is set to "...more >>

The following is all relevant to VS 8.0.50727.762 (SP.050727-7600) I have .Net 3.0 installed along with the CTPs for WPF and WCF etc. I do NOT have Orcas installed. I have created UserControl A I have created UserControl B that has UserControl A on it I have created UserControl C that has Use...more >>

Hello, I experience a strange problem with PictureBox I draw onto. My application has a fill-docked TabControl on its form and there is PictureBox on one of the TabPages. If I resize the form (hence the PictureBox should resize too) WITHOUT switching to the TabPage containing the PictureBox bef...more >>

Hi, I have a menu item who's shortcut key is the DEL key. The shortcut is there to delete selected rows from a GridView. The problem is that if the user is editing a cell, it never receives the delete key to delete text within the cell. Any ideas on how I can get the cell to receive the k...more >>

It seems when using a tabcontrol, repainting the form when clicking a tab takes a few split seconds, how can I repaint my form after all controls and data is loaded?? -- Best regards Luc ...more >>

Hi, I am using Visual studio 2005. I'm developing an application in c# for a PDA running the Windows Mobile 5.0 OS. I want to apply Windows XP style to my Windows form(on the PDA). I tried this: http://msdn2.microsoft.com/en-us/library/5d1acks5(vs.80).aspx but I dont have the "Enable Visua...more >>

The ToolStrip on top of my form is to small. I want to increase its height. Simply setting the Height-property doesn't change the height, though. So I tried to place the ToolStrip in a ToolStripPanel, that does react to changes in its Height-property, and by setting the Dock-property of th...more >>

Hey guys, I'm getting into a deadlock condition every once in a while when running my app. When I see that it's deadlocked I "Break All" in the VS debugger and take a look at what the current running threads are doing. I noticed that one of my threads (the one I expect to be running at th...more >>

I have a windows service (I know, wrong group but I couldn't find a windows service group) loads an individual record from a db to do some work. I use a thread to do this because it is possible for a large number of requests to come through at the same, or close to the same time. Part of the ...more >>

I have a .Net 2 WinForm app which allow multi-windows to co-exist (in task bar). They are all spawned from a main-form. (i.e., Form A can start Forms B,C,D,E) 2 questions about call-backs Question 1) Forms B,C,D contains DataGridView, which I need to make sortable on multiple columns/f...more >>

Is it possible to programmatically click (and make node checked also) on the desired treeview (System.Windows.Forms.TreeView) node. I.e. pseudo code: myTreeview.Nodes[0].Click(); This code has to trigger the treeview AfterCheck event. Thanks in advance Sanjin ...more >>

I have an app which I deployed last week. If I make a change to the app and it only affects changes to existing code. what I mean by that no new projects/dlls, no new controls etc. What do I need to copy up to the deployement site, just the new .exe? Bill ...more >>

Hi! I'm having some trouble with BackgroundWorker objects and making some "heavy" work that is *not* supposed to be in the progress bar dialog itself. I basically want to do something like this: ProgressForm form = new ProgressForm(); form.Show(); // ... Do heavy work here ... form.Upda...more >>

Hello I'm trying to draw a PictureBox with an image of size 40000 x 200 pixels. Because the image width is larger or equal to 2^15, drawing the image will crash. Code snippet: Bitmap bmp = new Bitmap(40000, 200); pictureBox1.Image = bmp; Exception Text: System.A...more >>

I'm writing a Winforms program in VB, Dot Net 2.0. I have a datagridview on a form and I've defined a column as a DataGridViewLinkColumn. (I have the usual programmer's problem. I am not sure what sort of machines this code will run on so I am shooting for the lowest common demoninator.) ...more >>

I need to create a method to set focus on first control in a windows form How i can do it?...more >>

Hi there, I would like some advice in how to go about creating a plug-in type windows form architecture, this is what i had in mind: a form similar to windows explorer with the grouped navigation items on the left, each group in the left nav section will represent a plug- in application wit...more >>

Hello, I just implement a custom control that extends from DataGridView, every cell has different background. I found a problem, for now it seems to be erasing background incorrectly after selecting a cell, when switch to different application(hit Alt+Tab) and then once more to back. The back...more >>

In Webforms, I can access the user's network login (windows authentication) by: User.Identity.Name What is the Winforms way of doing this? ...more >>

I am new to C#, but not new in programming. I am trying to add a Login form to a test Win forms application. Somewhere in the internet I found a post suggesting using LoginDlg, I added the code provided LoginDlg ld = new LoginDlg(); ld.ShowDialog(); but I am getting...more >>

Hi all Firstly, sincere apologies for cross posting this, I did post on the DataBinding forum but the traffic there is very low so I'm not confident of a reply. Anyway, I'm trying to put together a method to loop through all controls on a form and see if any of them are databound. For...more >>

We recently converted our .Net 1.1 app over to 2.0 and now our transparent forms are behaving differenctly. I was hoping someone might be able to shed some light on this issue... We have a windows form that is transparent. We set the background image to be a gif image that contains a transp...more >>

I've come across a problem with the Webbrowser control that I am hoping some of you folks might be able to help me with. FWIW, I am using VB.Net in Visual Studio 2005. On my company's website, we have a situation where a new window is opened (in this case, we actually use ShowModalDialog to...more >>

I need to play multiple sounds (.wav files) simutaneously in my windows forms application. I have already taken a look at System.Media.SoundPlayer class. I tried the following but it didn't work: - Create two instances of SoundPlayer. - Called PlayLooping on the first one to play fil...more >>

Hi there, I need to start my Windows Forms application without showing the form initially. Then at some point, the application will be signaled to generate and display the user interface. I'm trying to use Application.Run() without parameters. Since this method doesn't return I start a separa...more >>

I am working on a program where I need 2 things to happen at the same time. The form needs to load and at the same time I want to start a timer which after a certain amount of time kills the entire application. The user has to click submit on the form within 2 minutes, or else I want somethi...more >>

I just recently converted a VB 2003 project to VB 2005. The project compiles and runs fine but whenever I try to view any forms in the designer I get a "Object instance not set" error. If I create a new Form I can view it fine though, the issues is only with pre-existing forms. I also conve...more >>

I'm a little confused about using Control.Invoke with an anonymous method. It seems like the compiler is able to generate whatever glue code is necessary to turn an anonymous method into a delegate type in several situations, such as starting a thread: Thread workerThread = new Thread(dele...more >>

I'm trying to install a .net 2.0 smart-client application that uses the "click once" deployment method in a Citrix environment. If we log in as the admin on Citrix, we are able to install the application, but when we use a "normal" account that has very few privelages, we get the following ...more >>

I created a windows form control that inherits from the standard .Net DataGridView control, to which I've added custom functionality. Instead of using the standard control in my applications, I use my customized version. I have an event handler in the custom control for the KeyDown event that si...more >>

Is there anyway to detect when the user has clicked the red X button to exit an application (as opposed to triggering some other event which runs code which sends the Close() message to the form? I know I can use the CloseReason property of FormClosingEventArgs but that shows UserClosing wheth...more >>

Hi Everyone, How to show only year on UI using VS DayTimePicker in C#. Looking forward for your response. Thanks Sandy ...more >>

How do I check whether a form is already shown (open)?...more >>

I have the name of the form (in String) that I would like to show. How do I show the form, if I only have its form name in String?...more >>

My derived Form inherits several controls, including a Panel that is Dock.Top. Using the Designer on the derived From, how can hide/remove that inherited panel that this particular derived Form does not need? Setting the panel.Visible = false, prevents the Panel from drawing, but the Panel still...more >>

There are times when I mistakenly double-click a control and then VS goes to the code window and either generates the code signature for the default event or it navigates to the default event. Is there a way to disable this feature? Thanks Dan ...more >>

VintaSoftTiff.NET Library will help you to work with multipage TIFF files. You can add or insert image into multipage TIFF file, delete image from TIFF file - no temporary file is necessary. Image processing functions are also available: despeckle, deskew, border detection, rotation, blank page ...more >>

How to convert the following code from C# to VB. var photos = (from photo in xroot.Element("photos").Elements("photo") select new PhotoInfo { Id = (string)photo.Attribute("id"), Owner = (string)p...more >>

to Is there an easy way, to bind some xmlNodeList? I tried to write a public class property that read the xmlNode and returned List(Of String) containing the element names, which are what I want to display in the comboBox. I'm finding millions of examples of simple databinding to a text box,...more >>

VS 2005 I have a databound checkedlistbox: With Me.LCheckedlistbox1 .BeginUpdate() .Sorted = True .DataSource = objB.Benutzertabelle .DisplayMember = "Nachname" .ValueMember = "Persno" .EndUpdate() End ...more >>

Hi, I've found quite a lot of messages and posts by developers at a loss as to how to use MakeTransparent() to generate a GIF89 image with a transparent color...but I've come across a particular problem that I've yet to see mentioned, namely that using bitmap.Save("filename.gif") works j...more >>

I need to write a function that will set the width of tabs in a multiline textbox windows control to a specified number of characters. Here is the code I've tried; it is changing the tab size, but not to the size I'm expecting. Am I going about this the wrong way? Thanks. private const int E...more >>

My app displays real time data in grids on several forms. Each grid usually contains several thousand records. When we open a lot of forms the GUI thread can't keep up with updating all the grids (data decoding is done on a separate thread). Our clients have multi core CPUs but because the single...more >>

I have two assemblies, AppObj and AppControls, that originally had the default version of 1.0.0.0. Another assembly, AppForms, references AppObj and AppControls as Project references, and contains a class that inherits from System.Window.Forms.Form. If I change the version of either AppObj ...more >>

I have a MenuStrip with a bunch of menus and sub-menus. On one of the top-level menus I want all sub-items except the first to be disable/enabled based on Checked setting of the first. Like so: foreach (ToolStripMenuItem item in designToolStripMenuItem.Items) if (item != topDesignToolStrip...more >>