Post a Comment On: mo.notono.us

Do you wish to correct the value? Another "feature" of the Windows Forms DataGrid that drove me nuts for some time yesterday. Roughly speaking my problem and solution is described here: RE: [aus-dotnet] DataGrid.CurrentRowIndex vs DataGrid.CurrentCell.RowNumber My problem also seemed to have been caused by setting the DataSource to Nothing/null, which I had done to force a refresh of the grid. As a reminder to myself, this is a better way to refresh the grid: CType(Me.BindingContext(myGrid.DataSource), CurrencyManager).Refresh() Also, supposedly one should use the SetDataBinding method rather than setting the DataSource at runtime. I find that strange, as the DataSource property's set statement does almost exactly the same thing as the SetDataBinding method does: Public Sub set_DataSource(ByVal value As Object) If (((Not value Is Nothing) AndAlso Not TypeOf value Is IList) AndAlso Not TypeOf value Is IListSource) Then Throw New Exception(SR.GetString("BadDataSourceForComplexBinding")) End If If ((Me.dataSource Is Nothing) OrElse Not Me.dataSource.Equals(value)) Then If (((value Is Nothing) OrElse (value Is Convert.DBNull)) AndAlso Not "".Equals(Me.DataMember)) Then Me.dataSource = Nothing Me.DataMember = "" Else Dim flag1 As Boolean If (Not value Is Nothing) Then Me.EnforceValidDataMember(value) End If Me.parentRows.Clear Me.originalState = Nothing Me.caption.BackButtonVisible = (flag1 = False) Me.caption.DownButtonActive = (flag1 = flag1) Me.caption.BackButtonActive = flag1 Me.caption.SetDownButtonDirection(Not Me.layout.ParentRowsVisible) Me.Set_ListManager(value, Me.DataMember, False) End If End If End Sub vs. Public Sub SetDataBinding(ByVal dataSource As Object, ByVal dataMember As String) Dim flag1 As Boolean Me.parentRows.Clear Me.originalState = Nothing Me.caption.BackButtonVisible = (flag1 = False) Me.caption.DownButtonActive = (flag1 = flag1) Me.caption.BackButtonActive = flag1 Me.caption.SetDownButtonDirection(Not Me.layout.ParentRowsVisible) Me.Set_ListManager(dataSource, dataMember, False) End Sub