I'm have a sample form, with a ListBox and a Remove button, I'm doing data binding to a custom collection, everything is working find, I can bind the list box, I can see the items appear on the list, I can remove items from the list, BUT my problem is when I attempt to remove the last item on ...more >>

Hi, We are using Windows.Forms.DataGrid control in our application. Let me explain what i have done so far so it will easy to understand the problem: We have used DataGridIconColumnStyle for one icon column and second is DataGridTextBoxColumn for some other purpose In second column i am showin...more >>

I have a custom collection(which inherits from the collectionbase and implements ibindinglist) with various properties like DateOfSale, DateOfPayment etc... When I bind to a grid for example I want the header to display Sale Date and Payment Date. Is there a way to handle that in the custom co...more >>

Hi I got an VB.NET 2003 App with an MDI form and 4 child forms, designed for 780x1024. This applications is distributed world wide, but 2 users complain that they cannot see the full screen, or even with the scrollbars they are not able to scroll to the hidden areas. They use WINDOWS 2000 ...more >>

Hi there I'm attempting to download a file from our server programmatically using an internet connection. Ordinarily I would use WebClient.DownloadFile() but I would like to show a progress bar during the download. The code is given below. Any ideas why it fails? Best regards Loane ...more >>

On my .NET 2003 form(s), I'm restricting changing of existing records by setting the Enabled property to False on the bound controls. However, I notice that the textbox and combobox is painted differently when disabled. Plus, the grayed out text is hard to read. I've also tried using readonly,...more >>

Hi, How can I use a bitmap strip (16x16 images) in an ImageList which can then associated with a toolbar control? ...more >>

Can anyone suggest how I might achieve having a Minimize button, but NOT a maximize or close button on a form? Thanks! -mdb...more >>

I'm trying to programmatically change the foreground and background colors of a single ToolStripMenuItem on a ContextMenuStrip in VS2005 Beta 2. menuMapper.BackColor = Color.Green; menuMapper.ForeColor = Color.Purple; The background color doesn't change and the foreground color only change...more >>

I have bound a datagrid to a table in a dataset. Clicking a column to sort the presented grid rows works great. I have managed the indexing issues fine. I need to be able to preserve this sort order when necessary to refresh my dataset programmatically (dataset is manually created), or bet...more >>

Hello All, I Need to disable delete key so it should not delete rows from the datagrid but should be able to use the delete key when editing the cell. If any one has any suggestions please let me know. Thanks Raj...more >>

Hi, I am trying to prevent a form from being closed by the user until the code in the OnLoad method executes. This code can take quite some time to complete executing. This form itself is launched from my main form using ShowDialog. I cannot use an approach like having another form sho...more >>

Hello, I've release a small tools in .NET and out of 4000 users, I have 2 of them that experience the same issue and I would like to know if anyone ever seen that before. - The background is a big image - I use standard control (text box, label, button, checkbox) over the background ...more >>

I need to detect if the mouse get out of the window form. I'm displaying a form with border and titlebar with a panel that covers all the surface of the form, so unfortunately the MouseLeave event is of no use. Probably it should get the form rectangle and see if the mousepointer is contained...more >>

Hi: Is it possible to enumerate a BindingContext, returning all its BindingManagerBase objects so I can recover all the DataBindings from the returned object? All I can see is the indexer (BindindContext[DataSource]) where I need to pass a DataSource to recover the BindingManagerBase obj...more >>

Please help to put directory path to app.config file! //DirectoryInfo di = new DirectoryInfo("C:\\Vicky Development\\FundExplorer\ \Index\\Copy of IntlIndex"); //string dipath = @"C:\Vicky Development\FundExplorer\Index\Copy of IntlIndex"; //DirectoryInfo di = new DirectoryInfo(dipath); ...more >>

I've added items to a listbox by calling ListBox.Items.Add(new MyObject()), where MyObject has overridden ToString to show each item's display value. I can't seem to change the DISPLAYED TEXT when I change the object behind the selected index: ((MyObject)listbox.SelectedItem).mydisplayproper...more >>

I am trying to build a Windows forms application based on XP styles. Could someone let me know what are the common standards for building application on XP styles/themes. I remember there was a documentation on the msdn website but cant find it now. Any help would be appreciated. Thanks....more >>

I have a ListView where I increased the font size to make it more readable. Using visual styles (XP), the columnheader does not adjust it's height for the font. Is there any way to disable visual styles on just the listview so the columnheader will display correctly? Alternateivly, is ther...more >>

I getting EMPTY message boxes, when running this code System.Windows.Forms.MessageBox.Show("AAA"); under VS 2003 I also have VS 2005 beta 1 installed on my machine. What should I do??? ...more >>

Hi everybody, I'm looking for a way to lock the first column of a datagrid. I need to allow horizontal scroll keeping the first column visible (the first I can write into). I first tried to write in the very fist column (the one where arrow and star appears) then I tried to lock the...more >>

How can I cause a combo box to automatically drop down its list of values when the user moves the mouse over it ? ...more >>

Hi How can you get the index of a newly added row to a datagrid that is bound to a dataview (c# windows forms) Thanks ...more >>

I need a sanity check and am looking for help. I'm writing a C# Windows Forms application where when the user clicks a particular button the event handler for that button executes a rather lengthy piece of code (it goes off talking to various servers across the network using TCP sockets). I wa...more >>

Hi, I have a datagrid that is bound to a dataview. How can I select make sure that when a new row is added it is selected - even if the datagrid is sorted. I am using C# in a Windows Forms application. Thanks ...more >>

Hi all, I have a menu item, when user clicks on it, I want it to open an html file or a website, what to put in the onclick function? Thanks! KC -- -> ¹ª¨¬·F«l¡A¤Oª§¤W´å¡A¦h§Ö¦n¬Ù¦a«Ø³]²z·QFYP¥D¸q -> °í¨M¿í±qÄP­ô¥|¶µªí­z¡A¥þ­±¸¨¹ê¤jÄPª÷Á`¸ô½u¡A¨«¦V¥|­Óª«¥óªì©l¤Æ -> ¯R¿Ë®Q¿Ë³£¤£¤Î...more >>

I need to display message box with custom message. If I use standard MessageBox class as follows everyting works OK. MessageBox.Show("Sample Text", "Sample Caption", MessageBoxButtons.OKCancel, MessageBoxIcon.None); The only problem is that can't get rid of control button in the caption ( ...more >>

I am having trouble allowing a user to drag an item, whilst also allowing them to click the item. I am using mousedown, mousemove and mouseup. It works if I click the button carefully, but if there is any mouse movement, then it is interpreted as a drag, and the click does not work. What I want ...more >>

I have an application with a single main form. I want to create a "toolbox" form that always floats above the main form, but does NOT float above all the windows on the desktop. How can I accomplish this in .NET?...more >>

(Framework V1.1) Does the TreeView control not work with Visual styles (as far as the scroll bars) ? I have Application.EnableVisualStyles() in my Main method before form creation, but the tree still displays the boxy gray scrollbars. Is there a workaround for this? Dan...more >>

Q How to do findbyValue search in a dropdown in WinForms?? And how to set the searched value as default selected in dropdown?? Need help Thanks Vinay -- http://pathidotnet.blogspot.com ===== vInAypAtHi o__ ---_,>/'_------ (_) \(_) ---------------...more >>

I am developing a game server browser winform application. The app will query selected servers that are hosting a game (e.g. Quake 3), and the server will send back a string with various info. One of these pieces of info will be a list of players names. My problem is, players can colour th...more >>

I want to enter text in a textbox, but have it appear right to left. I want to keep the English cultural settings to do it. When I select RightToLeft = yes, and TextAlign=left, the text ends up right aligned. The entry cursor appears to the left of previously entered text, but when I actual...more >>

Hi there We use a own developed smart client application within our company. The very first time we start this application it takes about 50 seconds to start which is fine with us as we know some assemblies and other stuff is downloaded into the download cache. When I close it and restart...more >>

Hi, I want to assing function keys as shortcuts for buttons in my application(vb.net). How do I do this? Pls. reply as soon as possible. Waiting for early response, --RbanBph...more >>

Hello, I am creating an application where I have to list my found bluetooth devices in a ListView. So after each search I will check if the device already exists. I do that with the following code, but it doesn't work. It can't be to difficult I think, but I still haven't solve it..so I ask f...more >>

Hi, I want to use function keys as shortcuts to buttons in my appplication(vb.net). E.g. by pressing F3 strat button should get clicked. How can I do this? Waiting for early response, --RbanBph...more >>

I'd need to resize a form using fixed steps. What I mean is that the window show have width and height mutiple of let's say 50 pixels. My form has a border. Thanks for any suggestions....more >>

Is there any "easy" way to make PictureBox runtime resizable? Thanks for any guidance....more >>

Hi I just wanted to Know is there any function like refresh to refresh the Combo, my Requirement says that i change the value in the combo1 then combo2 must reflect the values according the combo1's selection. but Combo2 is showing the previous values available for Combo1. my Combo ...more >>

Hello, I can't seem to unselect comboboxes in VB.NET. I've set the datasource, valuemember and displaymember properties of the combobox. The first item from the datasource is always selected in the combobox, even when I set the SelectedIndex property to -1. I've read the common used soluti...more >>

Hi, How can I give backcolor,forecolor to combo box in vb.net application through code? thanks in advance, RbanBph...more >>

Hello, I want to specify a forma's backcolor at runtime. How can I know the color from it's color code. E.g. I want to give color (192,192,255) as form's back color. for this I want to use, frm.backcolor=color.colorname. How can I know the exact colorname of the specified RGB color ...more >>

I am using to the Winforms ComboBox to simulate functionality similar to that in the address-bar of Windows Explorer. Specifically, I want the following functionality: 1. Indented items with image icons in drop down - I can simulate this by setting DrawMode to OwnerDrawFixed. 2. Show the p...more >>

Is anyone out there really using inheritance for serious code reuse in a real-world setting? (As opposed to toy examples). I'm finding it to be so unstable that it would literally take less time to code all the forms individually. I'd be very curious to see if anyone else is having these pr...more >>

I have windows form which contains six radio buttons. I need to split these radio buttons into two independent groups (4 + 2) so they can operate independently. I mean selection in one group doesn't affect other and vice verse. I know that I can achieve this by using group controls and placi...more >>

When i try to copy contents from datagrid cell is using "Ctrl-c" its throwing an unhandled exception. Exception Details: -------------------- An unhandled exception of type 'System.InvalidOperationException' occurred in system.windows.forms.dll Additional information: The '' DataGridColu...more >>

i'm trying to make an event handler for my dataview but there does not seem to be an option for it. i want the event handler to listen for key presses. currently i have: this.dvTypes += new System.EventHandler(this.dvKeyPress); void dvKeyPress(object sender, System.Windows.Forms.Key...more >>

Hi: I have implemented a class taken from msdn website that inserts a combobox into a grid cell and binds the value property to a column. It works except that when changing rows using arrow keys it will bomb when a combobox is in edit mode. I get error saying current row number doesn't match...more >>

I'm updating a .NET DLL that is used by a windows app. Unfortunatly I can't change the windows app, just my DLL. I want to run most of my code in a different thread (for multiple reasons...) but a vendor API that my DLL uses requires a message pump for an internal timer. I wrote a test prog...more >>

Hi! I have a form that I open modally in an mdi-application, designed to search for employers. The form contains a gui-component with some search criteria input fields, a result list and a select button. If the user has selected one of the rows in the result list, and clicks on the select b...more >>

Hi, it appears to me that the status bar label element can only hold a limited amount of text. Is it possible to change this? TIA, Axel Dahmen ...more >>

Hi I just wanted to Know is there any function like refresh to refresh the Combo, my Requirement says that i change the value in the combo1 then combo2 must reflect the values according the combo1's selection. but Combo2 is showing the previous values available for Combo1. Can u pleas...more >>

Hi: How do you remove a row from datagrid and will it be reflected in underlying datatable? Thanks, Charlie ...more >>

Hello, I'm developing an application in C# .NET. I have a problem with components flickering during resizing window. I realized that some application (e.g. Mozilla Firefox) doesn't redraw all the components all the time of resizing a window - it just draw a gray rectangle. And then, after m...more >>

I am creating a form class that will be the base for other forms and I would like to add a designer to it. Is this possible? Thanks! Kurt ...more >>

I developed this module, examples on the internet seem to be much longer.. Can someone explain to me why my solution doesn't work? Module modAPI Declare Function SetForegroundWindow Lib "user32" (ByVal hwnd As Long) As Long Public Sub ActivateAppWindow() SetForegroundWindow(f...more >>

I need to use HtmlEncode in a windows application to write a string to a database that will subsequently be used by a Web Service and Web Site. I find how to make use of HtmlEncode from a windows app! Any help? Thanks RichardF...more >>

JAWS doesn't seem to do very well with combo boxes. It always reports "zero items". I really don't see a property to set or a way to make this work. Any suggestions ot ideas. We have had other issues too. It just doesn't seem like JAWS works with .net apps very well. Thanks in advance. --Bru...more >>

I have two classes I serialize and store in a Jet database as blobs. When I need these later, I reverse the process. The basic code: // Serialize MemoryStream ms = new MemoryStream(); BinaryFormatter bf = new BinaryFormatter(); bf.Serialize(ms, Class1Instance); Byte [] Class1Blob = ms.ToArr...more >>

Hi I am fairly new to Win Forms as i am a web developer. My Q is How to hold DATA between the page navigation ?? I am talking about something like Session in Web developement. How to HOLD the data ?? Thanks Vinay ...more >>

Hello, I would like to have combobox come up in datagrid view control in Windows forms project. For example one of the columns is US States. When users enter into edit mode I would like this cell to show up a combobox with the states value. When this cell loses focus then the selected va...more >>

How do I use a delegate for WndProc? I have a form that processes (intercepts) some windows messages only when a particular command button is pressed. How do I use a delegate for WndProc so that I can override the WndProc Sub only when the button is clicked and restore the original WndProc wh...more >>

On May 3, I posted a question asking how to do this. A colleague and I figured out how to do it. Thought I would pass it along. // The following code prevents multiple instances of a program // from being launched and if the currently executing one // is minimized or covered by another window...more >>

Hello, I want to ask that is there any way to get "Arrow Keys" press on DataGrid, KeyPress, KeyDown and KeyUp events don't work for ArrowKeys. TIA. Maqsood Ahmed [MCP,C#] Kolachi Advanced Technologies http://www.kolachi.net *** Sent via Developersdex http://www.developersdex.com ***...more >>

I am trying to take the background color of the form from a user's preferences file stored in xml file. I tried: while(XmlRdr.Read()) { //check the node type and look for the element type //whose Name property is equal to bg_color. if (XmlRdr.NodeType==XmlNodeType.Element&&XmlRdr.Name=="b...more >>

I can find lots of references to Nullable DateTimePickers written in C#. Unfortunately my attempts to translate them into Visual Basic have failed. Does anybody know of a VB version. I don't need anything fancy, just the ability to bind to a table which may have null values for the date. Ma...more >>

I've been using the GDI+ DrawString() lately and have noticed it is very slow. I'm curious, how do basic components like Label etc draw their strings? I just assumed they used DrawString like us normal humans, but am i wrong? cheers dave ...more >>

Anyone know how to disable the screensaver while a .NET (c#) windows forms application is running, and to enable it again on exit ? ...more >>

How do I open a child form in an MDI form at startup of a windows application. TIA ...more >>

I can not make the DrawItem event to work on the CheckedListBox control. I suggestion will be highly appreciated. I have the following code. The code works for ListBox and the second item (Two) is displayed in red in the ListBox but the CheckedLIstBox displays everything in black (where it ...more >>

How do i determine when the activecontrol has changed and by changed i don't mean the value of the activecontrol but my activecontrol was textbox1 now it is textbox2. The problem is based on what type the activecontrol is i want certain menu items enabled. For example if a datagrid is the activ...more >>

Hi there How do I not show any icon at all in my Windows form? There doesn't seem to be a Visible property. Best regards Loane ...more >>

Hi there Is there a simple way to create a rounded rectangle in my Windows form? Best regards Loane ...more >>

Hi there Is there a simple way to check whether the contents of a particular folder (all files, also files within subfolders) match the contents of another folder? Best regards Loane ...more >>

Hi there [sorry about all the silly questions...] How do I insert a copyright or other unusual symbol into a Label control? Best regards ...more >>

I'm busy developing a WinForms application that would be responsible for polling a database and performing some manipulation of the data retrived. Altough it would be running as a server-side application it requires a GUI in order to show what is currently processing and some summary informati...more >>