Hi, In my program, client is allowed to select a image file from open file dialog. And I am required to provide a preview button, when clicking it, system program like paint should be called to open that file. May you tell me how to implement that. Thx zlf ...more >>

I need to convert a label printing application from Froxpro 9 to c# 2. The application is a simple sdi app with a small preview window of the label on it. I'm not sure where to even begin to do this with c#. Any ideas? Here is the screenshot of the current application written in Foxpro 9. http:/...more >>

Hi, I have DateTimePicker control on a winform. When user selects a date in that control, I am getting proper value using DateTimePicker.Value. But I want to know in case user does not select any date and closes DateTimePicker control by pressing escape key. Here in this case also I am gettin...more >>

Hi all, I have a usercontrol I place on different parent forms. When I double click on something on the usercontrol I want to invoke a method on those parent forms. I also need to pass an object from the user control to the parent control when calling that method. how can I do this best? ...more >>

Hi, I have many content panels in my application, client asks me to add a print button in those panels. Once clicked, the content of panels will be printed out. There is a control in .NET 2.0 could meet my requirement? Thx ...more >>

Hi, I have a simple winform with a background that work fine. When I set both the RrighTtoLeft to Yes and RightToLeftLayout form proprties to True, the form background disappear. How can I solve this ? Thank You. ...more >>

I want to backup a sql express database from my windows forms C# code. I can do this by running a sql command "BACKUP DATABASE TO..." (or using SMO) and I can save the backup file to any subdirectories of C:. The problem I have is that I want the user to be able to save the backup file to any...more >>

Hi I have a windows form that includes a datetimepicker control. The form gets its data from a ASP Web service. The database field that supplies the data to the DTP control can have null entries. Unfortunately the DTP control either displays the correct date when there is data in th...more >>

Hello, I have the following reader function : public static string[] fileReadAllLines(string strFileName) { ArrayList content = new ArrayList(); using (StreamReader sr = File.OpenText(strFileName)) { string input; while ((input = sr.ReadLine(...more >>

I am using DateTimePicker control in my form and I wanted this control to be shown in open state (like user clicked it to open) when form loads. Any idea how to do that? Thanks! ...more >>

I load some data from the database during the forms load event. If this load fails, then I need to bring up the error message and abort loading the form. How do I do this in .NET 2.0? There doesn't seem to be a way of cancelling the forms construction from within the load event. Also if an er...more >>

Hello all, I've been working on a project in VC++.NET 2005 which contains a form with a custom control. Today when I opened the project, the designer complained: Could not find type 'VIAWorkspace.Toolbar'. Please make sure that the assembly that contains this type is referenced. If this typ...more >>

Hi I have a quite complex GUI in C#, where i save space by using many Panels, Pictures which hosts controls. When the user needs a function, i hide the "olds" panel, pictures.. then show the necessary ones. All these visible=true/false are killing my app in terms of display performance a...more >>

Hi, I have some html codes, and I need to present the rendered html page to user in winform program. I cannot find a helpful control in .NET framework. How to do that in .NET 2.0? Thank you ...more >>

Hi I want to have a combobox with some commands in it and a data source. Basically the list should look like command1 command2 ----------- data1 data2 data3 To solve this problem i decided to derive my own combo box form standard ComboBox control. I exposed 2 properties in this clas...more >>

Hi, Is there any event like Shown for User Control? I am instantiating User control once and adding and removing to and from parent form panel dynamically. I wanted a event which would fire every time the User control is shown (when added to parent from panel) like Shown event is for Form....more >>

Lets say I have a control at the bottom of my form and I have it set to anchor Top, Bottom, Left, Right That does exactly what I want it to do.... Ok here's my issue. I have recently taken the contents from that form and placed them on a user control instead. I set the output type to dll fo...more >>

hi, i'm a newbie to regex.... i need to check if a given string has more than two occurences of . in the begiining of string for ex, if string has value .test is valid but ..test is invalid Can you help me out with the pattern for such strings?...more >>

I would be pleased if someone gives me a general idea; how I am going to do this. I am using visual C++ .NET 2003. I made a simple program using conventional C++ code. This program accepts data from the user, does some calculations and outputs the result back to the user using th...more >>

I want my application to load any file that is text based (php, txt, rtf, asp, etc) - - just not any binary file In the Open file dialog, that's easy, but I want users to be able to load the files by drag/drop - - so therefore, I will need to check for the types of files. I could go through ...more >>

Hi, Do you know how to enable the use of a PNG as a form background and hence enable per pixel alpha transparency ? I have found some code on the code project but it either does not work with Visual Studio 2005 (the form editor stops working because I need to inherit from a Form derivate...more >>

Hi Guys, Just wondering if the WPF has a control to move picture on a form like google map? I know in .net 2 the picturebox doesn't have scroll function... Thanks James...more >>

I mean, to know if mouse button is pressed, especially, at any time. thx. ...more >>

If one control has already captured the mouse, how to completely prevent the mouse from getting captured by any other controls (objects), even if a dialog popups, for example. thx. ...more >>

Hi, I need bind a Treeview control in my windows form with xml file and also,,, display icons for each tree node.... how can I acheive it? ...more >>

Hi, How do I add items in ListBox in VB.NET with the value; ListBox.Items.Add("Text") only assign the text instead of the values. Thnx ...more >>

Hi, I have an MDI child window with a toolstrip contained in a ToolStripContainer. The MDI parent also has a Toolstrip contained in another ToolStripContainer. If I drag my ToolStrip onto the parents ToolStripContainer and then close the child window, the toolstrip does not go away. This is n...more >>

I previously posted this in the VB.General forum, but thought that this one might be a better place for it...sorry about the double post. I have created a simple form with code that looks like this: '****************************************************************************************** ...more >>

I'm using the GetCommandLineArgs (VB.Net 2005) in my form load event GetOutsideFile(Environment.GetCommandLineArgs()) so that, when I have files associated with my app, and double click on a file, they will run the app and load the file in it. However, when the app is already loaded, double-c...more >>

Can anyone please tell me how it is possible to get the following crash when accessing ListBox.SelectedIndex property: Message: Index was outside the bounds of the array. Stack Trace: at System.Windows.Forms.ListBox.ItemArray.GetEntryObject( Int32 virtualIndex, Int32 stateMask) at System.W...more >>

I created a custom control which simply is a data-bound ComboBox. It has a custom property that causes an ArrayList of KeyValuePair elements to be passed to the DataSource property. It also sets the DisplayMember and ValueMember properties. What's weird, is the fact that my control sometimes w...more >>

Hi, I have a DataGridView from Windows.Forms and need to be able to copy the contents of the current cell to the clipboard, yet have not found the way to do so. Any pointers will be very appreciated. -- Thanks in advance, Juan Dent, M.Sc....more >>

I am using the following code to send a request to a web site. It works fine on XP and Vista Home, but on a machine running Vista Business it gives the error, ConnectFailure. I can browse to the site in IE7 on the same laptop with no problem. This code works fine on other computers on the s...more >>

My VB apps written in Visual Studio 2005 are starting to have their certificate expiration date older than the current date. If I create or use a newer certificate I have to uninstall the app and reinstall. Is there a way to fix an expired certificate without uninstalling?...more >>

In Visual Studio 2003 one of the default treeview behaviors I relied on was the ability to do type ahead searching for treenodes. Like if my treeview had nodes for the fifty states, typing "ark" would make the treeview select the Arkansas node. But, now that I've upgraded my project to VS 2005...more >>

Hey guys, Is it possible to install VS 2003 on a machine that already has VS 2005 installed? I am not sure what the ramifications would be. Would VS 2003 overwrite newer components that VS 2005 installed or mess up file associations, etc.? Are there any other things that I need to loo...more >>

I have a requirement to create a windows service application that will need have settings (e.g. list values, connection settings, etc.) stored externally (i.e. not hard coded). To allow administrators to manage the settings I'll be creating a windows form application, very simple one, that ...more >>

I just checked in 'Device Manager' to see if everything was OK, and saw a question mark against Teredo tunnelling pseudo interface. When I clicked on properties I got the message - 'Windows cannot start this hardware device because its configuration information (in the registry) is incomplete...more >>

I've created a base class from which many usercontrols will inherit. The base class contains declarations for controls and event handlers. A derived user control contains the actual form controls (labels, textboxes, etc.). Everything seems to be working fine at run time but at at design time, t...more >>

maybe not. (if this is the wrong ng, plz point me to the right one).. i'm trying to add simple text find capability to a tool at work and am having problems. i want it to work just like Notepad - that is the Find dialog remains in focus after clicking the Find button and at the same time, t...more >>

Hi: I'm trying to give user something to look at while a ReportViewer based report runs. It takes a while because app connects to data over the internet. Problem is report locks-ups when launched in DoWork event. Backgoundworker seem to work with non-visual stuff. Is the problem because ...more >>

Hi My vb winform app updates between site sql server and in house access db. The app needs to always run and is in the start-up of client's sbs 2003 (windows 2003) server. Problem is if client restart server and forget to login the app does not run. I am resisting doing it as a service ...more >>

Could someone provide a quick example for .NET 2.0 WinForms of how to dynamically add a control "btnDynamic" to a form when button "btnStandard" is clicked. I don't want to hardcode "btnDynamic" to the form and make it simply visible, I don't want it to exist at runtime until "btnStandard" is ...more >>

Hi all , can any body tell me what is robohelp and how to use it in asp.net for displaying it like some help file. Its very urgent. Regards, kamal. ...more >>

Environment: VS05, C# I'm trying to come up with a good way to create and handle drag and drop images like those that are created by the File Explorer. My first attempt was to use ImageList but this only seems to work within a single control. Drag images are limited to the control in which ...more >>

I have a ListBox only to display list of data and do not want user to select anything. I set the SelectionMode to None. It worked as expected. But, when I close the window. The generated Dispose method raises an ArgumentException: Cannot call this method when SelectionMode is SelectionMo...more >>

hello, i am a long time asp.net developer, but new to winform programming. in the application ive been assigned, the mainform spawns a new thread to fetch a bunch of data from a method. this takes time, which is why its been placed into its own thread, allowing the rest of the ui to be usab...more >>

I have a line like resources.ApplyResources(this.label1, "label1"); in Form1.Designer.cs. But because of this line my form load event is not firing. When I comment this line, everything works fine. Any idea why this is happening and what happens if I comment this line? Thanks! ...more >>

I'm trying to write to the eventlog but unfortunately I keep getting the error at the bottom of this post. The code snippet is as follows: string source = "My Program"; // Create the source, if it does not already exist. if (!EventLog.SourceExists(source)) ...more >>

Sorry if this appears twice ... I sent it two hours ago and nothing appears in the newsgroup ... I'm trying to write to the eventlog but unfortunately I keep getting the error at the bottom of this post. The code snippet is as follows: string source = "My Program"; ...more >>