DataGrid Bindings not working

Jacobus01

Hi, I'm currently struggling with the WPF Toolkit's DataGrid. Well just one aspect to be more accurate. I am displaying the properties of an object in their own columns on the datagrid and each property is bound to a DatagridTextColumn. But if I add a new column after the object has been instanciated and I bind to another property of the object, the binding doesn't work. The datagrid throws a NullRefferenceException. How can I work around this without having to reinstanciate the object?

laprathab

can you post your code...

Jacobus01

OK, This is the XAML for the Datagrid: <my:DataGrid CanUserAddRows="True" RowHeaderWidth="10" CanUserResizeRows="False" Margin="235,344,38,93" RowHeaderStyle="{StaticResource RowHeaderStyle}" ColumnHeaderStyle="{StaticResource ColumnHeaderStyle}" HeadersVisibility="All" Name="TenderDataGrid" ItemsSource="{Binding Path=TenderLineItems}" AutoGenerateColumns="False" ColumnWidth="SizeToHeader" IsReadOnly="False" SelectionChanged="TenderDataGrid_SelectionChanged" CanUserSortColumns="False" SelectionMode="Single" SelectionUnit="CellOrRowHeader" IsSynchronizedWithCurrentItem="True" Background="#FFDDDDDD" BorderBrush="#FFAAAAAA" BorderThickness="3" AlternatingRowBackground="LightBlue"> my:DataGrid.Columns <my:DataGridTextColumn Header="Series" Binding="{Binding Path=Series, Mode=TwoWay}" Width="Auto"></my:DataGridTextColumn> <my:DataGridTextColumn Header="Item No" Binding="{Binding Path=ItemNo, Mode=TwoWay}"></my:DataGridTextColumn> <my:DataGridTextColumn Header="Description" Binding="{Binding Path=Description, Mode=TwoWay}" MinWidth="200"></my:DataGridTextColumn> <my:DataGridTextColumn Header="Unit" Binding="{Binding Path=Unit, Mode=TwoWay}"></my:DataGridTextColumn> <my:DataGridTextColumn Header="Quantity" Binding="{Binding Path=Qty, Mode=TwoWay}"></my:DataGridTextColumn>  </my:DataGrid.Columns> </my:DataGrid> (Sorry about the indentation)