Multithreading question 1

[shaminda]

If DataGrid1.InvokeRequired Then
Dim mi2 As New MethodInvoker(AddressOf AddDataGridData)
DataGrid1.Invoke(mi2, Nothing)

Else
DataGrid1.TableStyles.Add(tsGridTableStyles)
End If

Private Sub AddDataGridData(ByVal tsGridTableStyles As DataGridTableStyle)
DataGrid1.TableStyles.Add(tsGridTableStyles)
End Sub


I am getting the following error on line two of the above code

Method ‘Private Sub AddDataGridData(tsGridTableStyles as System.Windows.Forms.DataGridTableStyle)’ does not have the same signature as delegate ‘Delegate Sub MethodInvoker()’

What should I do to fix it? And what am I doing wrong?

 

[ThatRickGuy]

I'm not familiar with the 'methodinvoker' type. But this should get you a delegate and launch the thread with the proper parameter:

Private Delegate Sub del_AddDataGridData(ByVal gridTableStyles As DataGridTableStyle)

Private Sub AddDataGridData(ByVal gridTableStyles As DataGridTableStyle)
  If DataGrid1.InvokeRequired Then
    Dim del As New del_AddDataGridData(AddressOf AddDataGridData)
    dim o() as object= {tsGridTableStyles}
    DataGrid1.Invoke(del, o)
  Else
    DataGrid1.TableStyles.Add(gridTableStyles)
  End If
End Sub

You should then be able to call the AddDataGridData method safely from any thread.

Also, on a side note, parameter declarations should not be in hungarian notation. So no type prefixes. I think MS is recommending Camel casing these days instead of Pascal.

-Rick

VB.Net Forum forum796 forum855 ASP.NET Forum
I believe in killer coding ninja monkeys.

 

[shaminda]

Thanks Rick that worked.