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Software Development Network >> Windows Forms

Windows Forms

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Error: Invoke or BeginInvoke cannot be called on a control until the window handle has been created.
date validation
DataGrid Questions
ComboBoxes
hDC -> graphics object
string
System.Security.Permissions exception when loading a DLL from a network
Listview causing an exception in vs2005
how can i programaticaly delete the selected item (row) from a listview with 3 or more columns ?
Missing toolbar icons in print preview dialog

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Answer Questions

  • Rajpreet Singh Same project crashes when ran from the server

    Does anyone know why I can't run the same project from the server, that I did from a local copy   This is my first project and I already lost the local copy once today- so I moved it to the server so there will be backups, b ...Show All

  • Amarelo_Mrt No append Row

    How do i disable the appendrow in a datagrid. The datagrid is not readonly....i want it to be that way.  Second, I saw a solution used by a programmer, he did it in c, but, my datagrid its filled by a dataset, not by a datatable. ...Show All

  • nietzche BindingSource (Filter property)

    Here is the example in MSDN for the Filter property: // Filter the items to show contacts who are owners. BindingSource1.Filter = "ContactTitle='Owner'"; Is it a SQL expression or just limited to "=" operator  Note that BindingSource doesn't directly support filtering rather it requires the underlying data source to support filtering (which is typically only ADO.NET).  The following link has informat ...Show All

  • Les Thompson DataGridView + RowValidating = Index 4 does not have a value?

    Hello, I recently setup my DataGridView to use the RowValidating event.  However, whenever a user types something in to a NewRow (as to cause the DGV to create a new row and consider the current row's NewRow = false) and then hit escape to cancel the edit, the DataError exception goes nuts.  It keeps spitting out "Index 4 does not exist" in what seems to be an infinite loop. Here is my RowValidating code: private void dg ...Show All

  • dsweb7870 Using a crystal report from a dynamically loaded assembly

    I have a windows form app that is loaded dynamically at runtime via reflection.  In that app, I have a crystal report which is set as an embedded resource.  According to documentation, that report should be compiled into the assembly.  Whe ...Show All

  • JeremiahMetzen DLL Control in IE Windows Form

    Hi, We have a number of applications that are windows forms embedded within IE. Each one of these applications is accessed via a menu on a main controlling webpage. These applications share a number of assemblies. However, We've just noticed that which e ...Show All

  • Rob26 Style object

    Is anybody know how to change the style (such as color, font ...) of objects (like button, combo ...) in a centralize area of a Windows application.  I mean, I want to be able to have a functionnaly similar to cssStyleSheet (used in ASP.NET) but in a Windows application. I want to have multiple buttons style (like button with a particular color) and be able to change the style without having to select all the buttons that can ...Show All

  • voko Can't get images on toolbar buttons when running

    Hi everyone,  I have a VB.net application that has a toolbar with several buttons.  The first two buttons are the standard "save" and "print", with those typical images.  My problem is they show up and work fine in the form designer,& ...Show All

  • DhivyaN Does VS2005 has Ouklook bar control in standard control collection?

    I'm evaluating VS2005 for new Windows applications. Thanks for your reply. No VS 2005 is missing quite a few controls that people consider common including task-style windows like Outlook or Explorer, dockable windows (supports docking but not floating), collapsible windows, etc.  Fortunately with the introduction of layout panels it is a lot easier to implement these.  Still your best bet is to either find a free version (the ...Show All

  • DemianRulEZ Terrarium 1.2 Server -> charts fix

    I've found a fix to get the charts working in Terrarium 1.2 server (currently you'll only get a 'missing image'): open web.config (should be in the \Program Files\Terrarium 1.2 Server\Website folder), and add this line to the serverSettings: <add key="ChartPath ...Show All

  • Chaitanya Vempati Key code/String for space key?

    Hi, I'd like to press the space key in programming using  SendKey.Send(....SPACE...) . What's the sapce key to pass a the parameter to the Send method   It doesn't work if you pass in " "    Typically, Sendkeys only req ...Show All

  • Philip Fortier - MSFT Newbie Ques: Simple Line Chart

    Am totally clueless with this graphics drawing thing. All i am trying to do is get a simple line chart drawn, adding new values to the chart on a timer event. Now I know how to draw a single line in a picturebox when the form&nbs ...Show All

  • Vista A really basic question for Windows forms.

    I've done a ton of .NET development in ASP.Net using web based technologies for years now, however, I've had VERY little experience with Windows forms.  As such, I have a few questions I would appreciate some advice on;  I've started a Windows  ...Show All

  • IanMixxxqqq Open a file that is already opened by another app in readonly mode

    I have a vb.net app that imports a csv file created in Excel.  Very often the users forget to close the Excel app and get the following error message in my vb app: An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll Addit ...Show All

  • texlnghorn How do I get the active item in a listview?

    I'm trying to make a method where I doubleclick on a listview item, and a button should then be added on a panel with the listview item's text Check SelectedIndices and SelectedItems properties. Okay, thanks. I'll try i ...Show All

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