Question

I work with windows forms and on the form I have a DataGridView. This gridView I fill with a DataTable dt. The dt I fill with OdbcDataAdapter. For save the changes I use adaper.Update(dt) on Event Handler gridView_RowLeave. The problem is that dt doesn’t have last changes of gridView. For exemple if I modify some data in one row or add a new row with data when I leave that row the method dt.GetChages() return false and I must leave more that 1 row for dt.GetChanges() return true. Where can be the problem? Here is my code:

Private Sub FillGridview()
  Dim adapter As OdbcDataAdapter

  Dim sCommand As New OdbcCommand("Select * from SPEAKERS", con)
  adapter = New OdbcDataAdapter(sCommand)
  adapter.UpdateCommand = UpdateCommand() 'return a query for Update 
  adapter.InsertCommand = InsertCommand() 'return a query for Insert but without ID
  adapter.DeleteCommand = DeleteCommand()

  Try
    adapter.Fill(dt)
  Catch ex As Exception
    MsgBox(ex.Message)
  End Try
  gridView.DataSource = dt
End Sub

Private Sub gridView_RowLeave(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles gridView.RowLeave
gridView.EndEdit()
If dt.GetChanges() IsNot Nothing Then
  Try
    Dim res As Integer = adapter.Update(dt)
  Catch ex As Exception
    MsgBox(ex.Message)
    dt.Clear()
    adapter.Fill(dt)
  End Try
  If Not dt.HasErrors Then
    dt.AcceptChanges()
  End If
  gridView.Refresh()
End If
End Sub

Does anyone have any idea why dt don’t have last changes?

Thanks in advance!

Answer 1

Try to put a bindingSource component to handle data and do not link the grid directly to data