Hi
I am using an example you provided in a previous reply to implement drag and drop from a radgridview. When using the mouse down event to pass row information into an array if the row being dragged is being edited the application crashes completely. How do I handle this (test for the row edit state) to prevent the crash?
Regards
Joe
Private Sub RadGridView1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles SubContractgrd.MouseDown
Try
downpoint = e.Location
rowtodrag = GetRowAtPoint(Me.SubContractgrd, e.Location)
ContArray(0, 0) = (rowtodrag.Cells(0).Value)
ContArray(0, 1) = (rowtodrag.Cells(1).Value)
ContArray(0, 2) = (rowtodrag.Cells(2).Value)
If Not IsNothing(rowtodrag.Cells("Text").Value) Then
ContArray(0, 2) = Replace(StrConv(rowtodrag.Cells("Text").Value, VbStrConv.Uppercase), " ", "")
Else
ContArray(0, 2) = (rowtodrag.Cells(1).Value)
End If
If Not IsNothing(rowtodrag.Cells("D").Value) Then
ContArray(0, 3) = "SD"
End If
If Not IsNothing(rowtodrag.Cells("V").Value) Then
If Not IsNothing(ContArray(0, 3)) Then
ContArray(0, 3) = "SDV"
Else
ContArray(0, 3) = "SD"
End
End If
End If
End If
Catch ex As Exception
If Err.Number = 91 Then
Err.Clear()
Exit Sub
Else
MsgBox(Err.Description & Err.Number)
End If
End Try
End Sub
7 Answers, 1 is accepted
You can check IsInEditMode property to determine whether RadGridView is in edit mode. Use the EndEdit method to finish the editing process. I hope this helps. If you need further assistance, I will be glad to help.
Sincerely yours,
Jack
the Telerik team
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Hi Jack
Thanks for the quick reply; I have tried to trap the issue with the addition of the code lines:
If Me.subcontractgrd.IsIneditMode then
Me.subcontractgrd.EndEdit
End if
But I am still getting an issue the application falls over without reporting any problem in the catch block but the line below is produce in the immediate window!
A first chance exception of type 'System.NullReferenceException' occurred in MyProject.exe
This would suggest that the problem does not lie with the editor state but is being caused elsewhere. My grid is data bound and I am adding three additional columns to the grid at runtime, two checkbox columns and a textbox column, the user checks one of the columns and adds additional information onto the textbox. Could this be causing the issue? Should I load the grid rows using a disconnected data source?
Regards
Joe
The data source shouldn't cause this issue. Please, could you send me your application and I will investigate this case in detail. I am looking forward to your reply.
All the best,
Jack
the Telerik team
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I have uploaded a project file to support ticket number 240008.
Regards
Joe
Best wishes,
Jack
the Telerik team
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Rank 1
Hi Jack
Thanks for your code but I still have a problem which seems quite strange if the first of the checkbox columns is clicked then the application still falls over but if the second of the checkboxes is clicked first there is no problem even when the second checkbox is clicked and then the first is clicked. Why should the application remain stable and continue to work if this procedure is followed but fails if the first of the checkboxes is clicked first. I hope you can follow what I am saying.
Regards
Joe
Sincerely yours,
Jack
the Telerik team
Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.