I want to auto-size a user control based on RadioButton. How do I do this ? Currently when AutoSize is true it's sizing the control according to the base RadioButton class and how big IT thinks it should be - so how do I override this and set my own size? I want to perform a MeasureString in t...more >>

Hi all, I've developed custom controls for a project at work. All the buttons inherit from a base class that itself is derived from the Control class. The base class handles all state changes and triggers some virtual function calls that must be implemented by derived classes. All derived class...more >>

I'm creating a custom control (inheriting from base windows control RadioButton). I want the background for the control to be transparent, so in the OnPaint method the first thing I do is clear the client rectangle with a transparent colour: protected override void OnPaint(PaintEventArgs pea) ...more >>

Hi, VS2005b2 - I think TextBox.Cut, TextBox.Paste etc should not work with = ReadOnly =3D true... Because of that missing, I have to add tests in my code to prevent that. Am'I missing something ? TIA, AndreB....more >>

Hello all, I'm working on a WinForms app and I need to provide my users with the ability to insert files into the RichTextBox control. I have successfully implemented the drag & drop as well as being able to Paste a document into the control. However, I can't seem to find a way to allow the u...more >>

Hi, I am have an application which uses cotnrols and i want to expose it using browser in an asp.net application. Is there a way to specify referenced assembly in html object tag. part of my classes are in different dll and when it gives exception that it cannot load type etc and when i ...more >>

I'm searching for a good way to avoid the bug that a treeview displays a horizontal scrollbar in non-XP style when you fill its nodes e.g. in the constructor of your form. This seems to work: public class MyTreeView : System.Windows.Forms.TreeView { //.... [DesignerSerializationVisi...more >>

Is there any way of changing the header control 's ( column header) background color? I want to give different color to each of the column of the listview's header. I know owner draw ia one way of doing it but I would like to if there are any APIs available to do this . many thanks ...more >>

This is a hairy one. I have a situation in which the textbox.validating event fires when it should not. The Text box is itself contained in a user control, which is then loaded dynamically into a panel on a form. The form has some buttons on it, some of which have CausesValidation set to Tr...more >>

Hi, what is the MousePosition property of System.Windows.Forms.Control? I tried reading it but I can't relate the Point values to the real position of my mouse. Thanks. ...more >>

Hi, I would like to use the OpenFileDialog to allow the user to select a file for processing. Is there any way I can prevent the user from browsing to folders other than the InitialDirectory? For security reasons, I cannot allow users to browse to other folders on the computer. Thanks,...more >>

Hi to all, I have a text box that must display a string readed from a MSDE database. In Win2000/XP when a carriage return (e.g. where the user that entered the string pressed ENTER) is encountered, I got a small box and the string don't go to a new line. In my developing machine, a Windo...more >>

Hi, I'm developing a custom tabControl and could not intercept the onPaint/onPaintBackground events in the inherited class. Is there anything I'm missing here? Here's the code: Public Class myTabCtl Inherits System.Windows.Forms.TabControl Protected Overrides Sub OnPaint(ByVal ...more >>

Is there a simple way to change the colour of the checkbox's background colour from the default white to another colour for the actual box (not the label which you can do at design time)....more >>

My user interface design requires that ErrorProviders are used for errors but also to indicate warnings to the users as well. In order to provide a clear visual clue between errors and warnings its necessary to have two differing icons. I could place two ErrorProviders on my form, but wha...more >>

Hi, Do you know any free edit control that highlights C# syntax? Thanks in advance £ukasz...more >>

Is there a good way to automatically tab to the next control when the user has typed in the max characters into a textbox? The idea is to flow from one text box to another without the user having to use their mouse or tab key....more >>

Hello! I try to programm a webcontrol, which uses remote-scripting. Therefore I implemented the ICallbackEventHandler interface. I Registered the JavaScript-File as embeded Resource in the OnPreRender method. When I view the HTML source, my JavaScript File is included as <script src="/Web/Web...more >>

Hi All, In my window application i used shortcut keys for my controls. Until press Alt, the shortcut keys are not displaying. Can any one help me out. Regards Dhana ...more >>

Please could someone show me how to do the following in VB .NET: 1. Freeze a column in a datagrid similar to the functionally in Excel where you can 'Freeze Pane' - so when you scroll right you can see the first column. 2. When a user selects all and copies the cells in a datagrid in o...more >>

Hi: I need to Identify the thread (or context) where the main form is running, so if the current thread is this thread, call BeginInvoke.. The idea is: I need to Open a DbConnection and launch a query, but when the query finish, it could possibly start another, so I do not want to close...more >>

In Design time can I create a UserControl and then drag that UserControl to one of the forms of the application ? How ? After I try to do this, then cannot drag that control after full generation of solution. If not, then it means that only solution is that I have to create a Control Librar...more >>

Does anyone know of a way to display multiple columns in a ComboBox dropdown list? I found one solution at http://www.codeproject.com/vb/net/ControlsTest.asp, but the listbox that it uses (in place of the combo's dropdown list) is not fully visible past the boundries of the form. Is it p...more >>

In our windowsForm application, we use drop down boxes in many places. At times, when the user clicks on the drop-down box, no text is visible, but as the user moves cursor down, the correct text is shown as selected. Very strangely this happens certain times but at other times all text is v...more >>

Hi, I'm trying to bind a custom collection class to a data grid, following the guidelines from the article http://msdn.microsoft.com/msdnmag/issues/05/08/CollectionsandDataBinding/default.aspx. The problem is the article is in VisualBasic. I already get the collection to be recognized as ...more >>

Hi, I am wondering how to best perform localization without using satelite assemblies. Globalization would of course also be nice. I don't think the application will reach _that_ great an audience, but I might as well be prepared for it. What I really want is to add a component of some type...more >>

After many hours troubleshooting a problem, I found that the problem lies in Docking a Panel. If my panel1.Dock = System.Windows.Forms.DockStyle.Left, the panel height cannot be modified programmatically anymore. Is this a feature? If yes, why? Thanks. ...more >>

I've got a custom control called LabeledLine. It's a very simple control as this is the first one I've ever done. It works perfectly save for the fact that when I use it in the designer and try to run the project, I get the following error: 'System.Windows.Forms.Control.ControlCollection' do...more >>

Hi, Is there actually a way to get ALL the Controls on a Form? While using the ControlCollection, it only returns the Controls that are directly on the Form, not the controls that are on a (TableLayout)Panel etc. I never found something like that, but it just would be nice in my opinion :-)...more >>

Hi, I asked this earlier but i'm not sure if i phrased it correctly. I have downloaded and used ZoomPicBox from BobPowel, and i create this control during run time. During Run time the name of the control becomes ZoomPicBox & i, i being a number depending on the amount of images being add...more >>

Hi, Where can I find Chart control with source for C# or VB. thanks mario ...more >>

how to get the number of milliseconds between two System.DateTime objects ...more >>

Hi all, I have some custom collections (ArrayList of custom Objects) and I want to display them using typical Windows form controls (DataGrid, Combo). What should I do to expose them as valid datasources to these controls? What if I want that these collections work with Visual Studio on des...more >>

Hi, I have a Windows Forms Control which gets hosted by IE. The control requires most of the available permissions and is therefore assigned the "FullTrust" Permission via its strong name. The zone the Control is run from is "Local Intranet" (= 1 ?). When the Control is hosted by a remot...more >>

Hai, I am creating MDI Application which uses Docking, Actually I downloaded this project and implemented in my application. But i cannot able to get the Active Mdi child which returns null. Help me What i have to do...more >>

This message is posted for the Google crawler. No reply is required I want to caution other developers about a product called "EntrySet.Extenders" by a small controls house called Pure Components. The developer makes heavy use of testimonials to market their product. Since I don't think the...more >>

Hello all, Been doing web programming for some time now and have recently made a transition to winform programming. I am looking to use the datagrid control to load some data with a twist. I would like to have a datagrid where I can add a row that has a cell that I can span across two cel...more >>

I want a textbox control which support like-as IntelliSense feature to allow user select a word when inputting text. Is textbox control support it? Or Are there any third party control support it? ...more >>

Hi all, I am trying to display a bunch of thumbnails of images in a listview control. I set the View to LargeIcon and set the LargeImageList property. But the icon displayed is pretty small. I changed the View to SmallIcon and set the SmallImageList to the same ImageList I used in LargeIcon Vi...more >>

Hi, I'm having some weird behaviour, and I can't find any solution to this. I made a UserControl (uclCommands) which contains a Toolbar (ToolBar1) with Modifiers = Public. I put this usercontrol on my form and call it Ucl1. In the Property Window in the Windows Forms Designer I change Ucl1....more >>

I don't know it this can be accomplished. I have looked in the news groups, MSDN and did not find an article about this. If there is one please point me to it. What I want to do is add icons for additional folder paths to the list of folder icons on the left of the dialog under the "Look ...more >>

I have a requirement to disable/hide some controls when multiple rows are selected in a datagrid. I can handle this very easily in the datagrid clicked event by counting the selected rows. However, if the user selects multiple rows by using shift + arrow or Ctrl+A then the clicked event does...more >>

Hi everybody, When selecting text in a textbox by moving the cursor while holding the shift key there are two 'modes': 1. if you start the selection by moving to the right then the selection extends to the right, and moving the cursor left&right moves the RIGHT end of the selection, as if...more >>

I am using PrintDocument to draw bar chart and I want to include drill down capability. Is it possible? Please any one hep me with VB.Net code...more >>

attempt to center a picturebox I was doing it the old fashioned way, as we learned in vb 4+ This was just the beginning of my code. I will eventually make it dynamic, loading the images one by one. Dim fx As Integer = Me.Width Dim fy As Integer = Me.Height Private Sub Fo...more >>

Just before I write the code to recursively iterate through the nodes.... ....is there any quick way to find a node. Every node I have has a unique integer value in the Tag. Surely there's something? It's a basic Winforms TreeView I'm using C# in VS 2003 Thanks in advance ...more >>

I have a custom control which has mouse move and click event handlers. The problem is that the control needs to somehow tell the application (i.e. the form in which the control is located) when a particular event takes place. Really I want the custom control to call a function in the app pas...more >>

I have written a small app (in C#) for keeping notes. It has a TreeView Control which is used for categorising the notes and a ListView and RichEdit to keep the actual notes. I want to give a bit more information when dragging a node on the TreeView and I found a sample that uses a small bor...more >>

Hello: I have a form with labels and textboxes, but some of the textboxes can appear as read only, and I want that when the form gets loaded, the control with the focus is the first textbox with readonly set to false. I Could use Enabled, but in disabled form, the textbox text can not be ...more >>

Hi I'm developing an application with a tabview. Each tab there are a no: of controls and control events. I dont want to keep all tabpages in a single .cs file. Options are to create usercontrols or custom controls. I dont know which one to go for. Also i need designer view to design tabs ...more >>