I use VS .Net 2002 and a C# project. When I set ToolBarButton.Enabled to false, the corresponding icon is just gray. I mean it is not grayed a little bit in a way that you have the chance to recognize the underlying image, the image is completely hidden. This is very ugly, not user friendly and ...more >>

Hello, I have a textbox in a form in which I would like to validate the user data. If it is too long I want to pop up a messagebox. Here is the code: private void txtDesc_Validating(object sender, System.ComponentModel.CancelEventArgs e) { if (txtDesc.Text.Length > 60) { ...more >>

Where is a string literal (say "test") stored, the stack or managed heap? I know a string variable is stored in the managed heap. In determining the toolbar button clicked in the button clicked event, which is more efficient: Select Case tbrMain.Buttons.IndexOf(e.Button) Case 0 ...more >>

I working with an MDI application. This application has many child form which have common menu operations. For example ChildFormA supports Cut/Copy/Paste. ChildFormB also supports Cut/Copy/Paste using completely different semantics. Now... I could add an Edit menu to each child form. ...more >>

I have Winform with 3 groupboxes One on the left one in the middle and one on the right size of the form Each groupbox have datagrid Problem is when I resizing form I can not see groupbox and datagrid in the middle How should I set anchor and docking so I can resize my form and see each...more >>

My modeless c# dialog is launched from a VB6 application. The tab and arrow key events are not being recieved by my modeless dialog. I think the VB6 app is consuming my keyboard events. How can I intercept keyboard events and rebroadcast them to my modless dialog? -- <_/\_>...more >>

Hi, Have anyone seen this problem? I just started developing Windows Forms application in Studio .NET 2003. I started a new C# windows application, added a new MainMenu to the app and menu item File. In the Designer, I located the text property for File in the property box and entered &F...more >>

Hi, all This is common problem when muti thread update an control. My app create threads that each thread transfers data from different server and display the status on the datagrid bound to DataTable obj. Most of time the number of threads are more than 100. Which means more than one hundr...more >>

1. In our application which uses NTLM; .Net always requests a file as Anonymous before requesting it using the NTLM authenticated credentials - in an application with over a million hits a day - this is quite a bit of extra posting going on. Anyone know how to stop this? 2. Even when supplyi...more >>

Hi, Is there any sample available for implementing multiple column sorting in .net listview control? My requirements are as follows: 1. When the user clicks on a column, the list view content should be sorted based on this column. Now if he holds a Ctrl key and then presses another column, a ...more >>

Hi everyone, Is there a way to check if a pc is online using vb net? Thanks in advance for any help that you can give me. Best Regard Sharon ...more >>

I've tried everything I can think of to disable wordwrap. Here's the code that sets up my RichTextbox rtfSQL: With rtfSQL .AcceptsTab = True ' Tab is a valid character, not a command to go to next control .RightMargin = .MaxLength ' Stop wordwrap .WordWrap = False ' Stop wordwrap...more >>

Hello, Hopefully this is a simple question: I have a Form with a Button and that button has a "Click" event handler. The button is marked as protected (not private). If I inherit from the form and assign the button another Click event handler in the derived class, will the base class hand...more >>

Is there a way to embed a dropdown combo box into a menu or toolbar? Thanks, TJ ...more >>

Hi, I have a WinForms application written in C#, in which I am using an embedded Microsoft WebBrowser ActiveX control. Based on certain events, I need to open a window from the browser control, something like (in javascript) - window.open("http://www.google.com,"","top=0,left=0,location=no,me...more >>

Hello, I have been working with an application that sends a dataset to other forms that are called from individual DLL's. I have noticed that, a dataset that is passed to another form, when changed, changes the dataset in all of the forms. But, if you send a string to the other forms, that ...more >>

Is there a way to detect if the computer name has been changed in .NET? ...more >>

I have a byte array (byte() loaded from an image from a SQL Server database, this could be a pdf, doc, an image type, etc.) and I have a Microsoft Web Browser control on my form I want to be able to send the Microsoft Web Browsercontrol the array of bytes and let it load, now I know how to use...more >>

Hi I want to loop the background color on my "about" form. This is the code I've tried to use. It doesn't work. The about form newer shows up. I thought Application.DoEvents(); would allow the form to show help appreciated! /mortb private void frmAbout_Load(object sender, System.EventArgs...more >>

Hi All, I have a set of textboxes bound to a typed dataset (ds1). This dataset contains one table which contains only one record. This is an example on how I do the binding for the textboxes: txtDescription.DataBindings.Add(new Binding("Text", ds1.ShareClass, "Name")); When I am about ...more >>

I have a modal form that takes a typed dataset and binds some of its comboboxes to it. Before i call ShowDialog() the dataset is just fine. In the OnLoad event the dataset is null. This is driving me crazy. Any help would be greatly appreciated! Skeleton code below: class MyForm : System....more >>

Framework 1.1 How can I trap the enter event prior to it's being raised and if need be suppress it? Thanks in advance for your help, Pete ...more >>

If there the same functionality is rendered with Docking or Anchoring should one be chosen over another? Docking tends to be faster at design time while anchoring allows non-zero spacing which eliminates the need for spacer panels. Any thoughts? Thanks, Marc...more >>

Hi! Our .Net Windows Form Application accesses 2 web services (over Internet). 1 web service is configured as SSL, and 1 without. The SSL web service methods are accessed after first setting the .Credential object on the web service object -> Successfull. We are now up to install our nic...more >>

I have make a class derived from the System.Windows.Forms.Control class I have write this method, protected override void OnPaint(PaintEventArgs e) { Pen myPen = new Pen(Color.Black, 1); e.Graphics.DrawEllipse(myPen, 10,10, 8,8); SolidBrush Colore=new SolidBrush(Color.Red); e...more >>

Hi, Before asking my doubt, first I want to tell you about my application structure. I want to design a Client Desktop program, which has an MDI form. This MDi Form has one Horizontal Toolbar. Button of Toolbar get added whenever it find Plug-in dlls in "Plug-In" directory. Now this Plug in dll ...more >>

Is it possible to select the paper source for a printer when printing using the ReportDocument-class? It is possible to set the PaperSource property in the PrintOptions-class of ReportDocument and use one of the PaperSource Enumeration values like "Auto" or "Cassette": CrystalDecisions....more >>

I have a class that once used the [Serializable()] attribute for simple serialization. I decided that I wanted to take control of how the serialization happens by implimenting ISerializable. I backed up my serialized file and was hoping to deserialize the old way and serialize the new way in...more >>

Hi! You can read in http://support.microsoft.com/default.aspx?kbid=307220 following: "The .NET runtime does not, however, support automatic proxy discovery scripts." I am working with a customer that IS using a complex "automatic configuration script" (see Internet Options/Connections/LAN ...more >>

Hi I am trying to do my own implementation of IInternetSecurityManager using managed WebBrowser control. C# Beta documentation suggests that "To use this feature, implement classes that inherit from the WebBrowser and WebBrowser.WebBrowserSite classes. The WebBrowser ActiveX control uses the...more >>

I'm working on a CRM app in which MDIChildren occassionally have to call forms using .ShowDialog(). However, this almost always causes an SEHEXception, which causes the entire app to collapse. Anyone come across this and/or got any suggestions? David...more >>

Anyone has a quick way to desaturate a single Color value? Etienne Boucher ...more >>

I have a list box that contains 4000 + lines that I have imported using the fileopen function etc. Once I have the data in the list box, I want to scroll through the lines in the list box displaying the contains of each line in a text box that is on the form. My command button scrolls thro...more >>

I am working on a application that has many custom made dlls. Actually, for this app each dll is a different form. I am able, with no problem to reference and instantiate them to use their public properties and methods with no problem. But, if one dll is trying to access another dll's propert...more >>

There is a VB6 project which have some forms, now I want convert to VB.net project by use the VS.net tools. but when showdialog other form ,all form disappear. this thing random happen. this appliction one form to the other form by "showdialog",thank you ! ...more >>

I have to do a series of about twenty string.replace operations on a long string, like this: BigString = BigString.Replace(FromText, ToText) BigString won't contain FromText every time, but I can't tell in advance which ones are there and which are not. My question is this: Am I be...more >>

Is it possible to use a different visual style than the one xp is using in a winforms application? Thanks, George Econmos...more >>

I'm having some weird issues when trying to use the Scale() method and anchoring. Here's the scenario. I have a form. This form contains a user control. This user control contains a button. The button has all of its anchorstyle properties set (so its anchored on all 4 sides). The form's resiz...more >>

Hi, I created a user control and added it in a Windows Form. It was working in the designer mode fine until recently. When I open the form in the designer mode, it throws the following error message: An error occurred while loading the document. Fix the error, and then try loading the docum...more >>

There is no enumeration for the windows directory in SpecialDirectories, how can I get the windows directory path ? ...more >>

Hi, I want to be able to run a winform from the command line both with and without arguments When I create the winform visualstudio I get a main method looking like this: STAThread] static void Main(string[] args) { Application.Run(new Form1()); } If I get some commandli...more >>

can this be done, or all of them have to have a grey back color ? thanks in advance, ant ...more >>

I have a RichTextBox that I am formatting with colours/fonts etc. But whenever I append some text on the end it's losing all formatting, eg:- output.Text += "some extra text"; This reverts the existing text to the base colours/font even though I have previously applied and seen the corre...more >>

I can't find a drawing toolbox in windows forms - how can I draw lines, squares, circles etc on my form surface ? ...more >>

I have a problem with a Winform application (VB.Net) that timers just stop firing. I first used System.Windows.Forms.Timer - which failed very often so I replaced them with System.Timers.Timer and all appeared Ok till someone started using two copies of the applcaition at the same time. ...more >>

I'm trying to get DrawItem and MeasureItem working on a ListView, with a view to drawing items in LargeIcon view. I've managed to get DrawItem working okay, using the code below. My problem is with the MeasureItem event. The event is only ever called once, and most annoyingly, are never called w...more >>

I'm trying to get DrawItem and MeasureItem working on a ListView, with a view to drawing items in LargeIcon view. I've managed to get DrawItem working okay, using the code below. My problem is with the MeasureItem event. The event is only ever called once, and most annoyingly, are never called w...more >>

Helo all, I have problem with help window. I use simply command in button click handler: Help.ShowHelp(this, @"C:\_CODE\CM\bin\debug\testhelp.chm"); when I press button, help window appears, but this window is opened ower my main window and I can't show main window over my help. Moreover, hel...more >>

Is there no way via the IDE to add event handlers for other than the click or changed events? If I double-click on a form it adds the load handler and if I double-click on a specific control it will add a handler for one one click or change, but I cannot find a way via the IDE to add other handle...more >>

I'm having difficulty with identifying the selected DataRow in my DataGrid. Here is the situation: I have a DataSet with several tables and relationships between the tables. This situation concerns a parent child table pair. I created a DataView for my parent table. The child table is relat...more >>

Hi, My Windows application is using WinXP style. I have the following two lines of code in my main form: Application.EnableVisualStyles(); Application.DoEvents(); I have another form that I open as a dialogbox, with a TreeView. That TreeView has a gray horizontal scrollbar (the vertical sc...more >>

Is the AppUpdater restricted to localhost use? I have an application to works fine retrieving updates from a virtual directory off of the default web site, but when I try to create a deployment web site, I get the following: System.Net.WebException: The remote server returned an error: (407) ...more >>

Hi. I want to use the Win32 FindWindow() function and I want to use its FIRST parameter, "ClassName" instead of its "WindowName" parameter to find a window for a .NET Application. I feel stupid but I can't seem to figure out 2 things: 1. What I create a Form in a VS.NET Windows Forms Appli...more >>

I have seen from the samples that you set the CurrentUICulture then you must open up a new version of this form and hide the old one. Is there a way to make it so the current form that is showing automatically updates to the new culture. Doing this will require you to some how get any values that...more >>

hi all in a webform, there is a banner user control which dynamically construct the navigation menu. by which I mean the menu item is added by code, in a postback event, I got the following error for the controls' postback event in the web form: "Failed to load viewstate. The control tr...more >>

I need to be able to edit the contents of a text SQL field as if the user were in MS Word. The user needs to be able to not just input text but embed images and spell check his work. His content has complicated formatting needs. I thought I could use the RichTextBox control supplied in VB.Net...more >>

Hi, What is the best way to show a 'form' inside another form. Or could I better use a user-control? I currently don't want MDI, rather a wizard-style interface... - Joris ...more >>

How do I forward a mouse wheel event (or create one) for a textbox in C#? I have a textbox that is within a tab page. The textbox is read-only and we don't want to focus on the textbox because the cursor shows up, so we set the focus on the tab page it is on. I can catch the MouseWheel even...more >>

I am looking at designing an app in vb.net that will feature forms that have tool buttons on them such as Add,Edit,Delete,Find,Next,Previous etc. When the user opens the form (MDI child), I will grab the data from the table into a dataset and pass it to the form. From then on until the form is ...more >>

Hi all, I'm using a datagrid to display some log entries. The entry populates downward, and I want to show the latest one as it comes in. i.e., I want the datagrid to scroll down automatically as a new row is added to the dataTable. however, I can't find the right event/method to handle t...more >>

Sorry for the cross posting, but I wasn't sure the best group to answer this question. I've been running my head into this bug for a while now, and I'm hoping that someone out there has a good fix for it. It's a fairly simple bug that really should have been caught previously, although I h...more >>

I have a windows application that gets installed using a installer program. (it has crystal which requires this) when I run the application - everything works. I exit the application and the dlls continue to run in task manager processes.... how do i kill them ---- I need to 'update' the app...more >>

There is a bug with the ListView control which is revelead when calling Application.EnableVisualStyles(). To reproduce follow these steps... - Create a new winforms app - Add call to Application.EnableVisualStyles() before Application.Run() - Add a ListView control and a button to the form -...more >>

I have a collection as a property of a composite class. For example, if I have an automobile class with a collection of cars. If I program: myPropertyGrid.SelectedObject = myAuto; The property grid will display Cars | (Collection) in the propertygrid. Is there a way to change the "(Coll...more >>

I am not much of a GUI person and am looking for some insight. I need to have a control that is multi-column and will allow for real-time updating. Any thoughts on controls, general steps or an example would be appreciated. Thanks, Dave...more >>

Hai, Is there anyway to disable the highlight the text means when you drag or double click on the text, the text should not be highlighted. I tried to call mousedown event and set focus to label control but it doesn't help. Thanks alot!!!...more >>

Hi, MS Outlook has a cool control that's a combobox, a textbox and a label. The combobox selection (marked with a check) shows in the label and the value goes into the textbox. The control is used to select which TYPE of phone number (home,mobile...) to allow the user to alter in the textbox. ...more >>

Hello group, I need to know the best and best responsive way to determinate is a windows form (or the desktop computer) is online (access to internet). I particularly interested for a quick check. TIA MajorTom ...more >>