I've encountered another problem with the GridView.  I cannot reproduce it on demand, but have triggered the error several times.  I realize that the process of causing the problem is beyond normal user action of the control, but stumbled on it all the same.

Clicking rapidly in the header area, especially on the seperator between columns, can cause the foolowing error to occur:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.GridHeaderRowElement.OnMouseUp(MouseEventArgs e)
   at Telerik.WinControls.RadElement.OnCLREventsRise(RoutedEventArgs args)
   at Telerik.WinControls.RadElement.OnBubbleEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadItem.OnBubbleEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.UI.GridRowElement.OnBubbleEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadElement.DoMouseUp(MouseEventArgs e)
   at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Again, I realize rapidly clicking in the header is not common or normal.  Perhaps I have a twitchy index finger :).  Nonetheless, the error does occur.

Thanks

Hi!

I have a problem with the "pin icon" and "close icon" of a DockPanel not showing correctly. The problem is also in the "Auto Hide" example. When you launch the example and open one of the auto hidden dock panels the pin and close icon are simple black ones. First when you hover them with the mouse they are drawn correctly with the green pin and red close icons.

The icons in the docked dock panels are shown correctly it's only a problem when a dock panel is auto hidden from the beginning.

How to solve this?

Thanks!

My Grid is populated with the following code:
cn.Open()
Dim dt As New DataTable
Dim da As New SqlDataAdapter("SELECT * from MyTbl WHERE [JobID] = '123', cn)
da.Fill(dt)
Me.RadGridView1.DataSource = dt

When I edit a cells contents and then move to the next row.  I should be able to send updates to SQL.   I tried using the event RadGridView1_CurrentRowChanged and then:
Dim strColValue As String = e.OldRow.Cells("myCol").Value.ToString
But the Old Value is returned.

How do I get an efficient 2-way link established between RadGrid & SQL?

Thanks in advance for any help.
-New Telerik Winforms user

I'm not sure whether I have just not found the feature, but it would be good to be able to place a RadMenu on a form and then to be able to assign it/parts of it as the context menu property of other controls on the form.  I guess wanting everything, it would be good to be able to do this dynamically through code too.

Best regards

Marek

Hi,

I used to be a web developer, so WinForms is not my thing. But now my boss asked me to make a little program with an Access database for some calculations.

And since we have the WinForm Controls as well, I wanted to use them. That's why I decided to use the RadPanelBar. And that went ok.

But can someone please give me a very short tutorial of how to work with the SplitContainer. I want to have in the left the navigation. And in the right box I want to load different forms, is this possible?

Thnx!
Kevin

Hello,

Can we change the Tab skin to a skin with a height of 36px instead of 22px?

Thanks,
Shimon Shed

Hi,

Now after the frustration and wasted time of working with WinForms I find the bug I reported has been pulled from the forum with no explanation.

You really have gone down in my estimation.

Please, explain your actions. The post wasn't abusive, rude or dishonest. It contained valid points regarding the usability of your WinForms controls.

e.CurrentRow.DataBoundItem throws a nullreference exception if it is not set. This should really be solved by just returning null, because using this code:

if(e.CurrentRow.DataBoundItem != null)
{
    //some code
}

doesn't work. Catching the exception causes unwanted side effects.

I try to add rows with "GridViewRowInfo Collection Editor", but when I try to press "Add" I always get following error messages:
"Constructor on type 'Telerik.WinControls.UI.GridViewRowInfo' not found. Any suggestion?

I have issues setting row formatting for a particular row.  I tried using the RowFormatting event to look at the underlying data item, and compare it to another value.  Based off of that I set the e.RowElement.BackColor to either white or grey.  The problem is that neither one actually shows until I select the row.  Once I select it I get the correct background color until I select another row.

Is there something I am missing...