wpf 4.0 datagrid template column two-way binding problem
- by rouwlee
Hello all!
I'm using the datagrid from wpf 4.0. This has a TemplateColumn containing a checkbox. The IsChecked property of the checkbox is set via binding.
The problem is that even if I specify the binding mode explicitly to be TwoWay, it works only in one direction.
I have to mention that the same code works perfectly in .net 3.5 with the datagrid from the wpf toolkit.
Please take a look at the .xaml and .cs contents.
Thanks in advance,
Roland
<Window.Resources>
<DataTemplate
x:Key="IsSelectedColumnTemplate">
<CheckBox
IsChecked="{Binding Path=IsSelected, Mode=TwoWay}"
/>
</DataTemplate>
</Window.Resources>
<Grid>
<DataGrid
x:Name="dataGrid"
AutoGenerateColumns="false"
CanUserAddRows="False"
CanUserDeleteRows="False"
HeadersVisibility="Column"
ItemsSource="{Binding}"
>
<DataGrid.Columns>
<DataGridTemplateColumn
Header="Preselected"
x:Name="myIsSelectedColumn"
CellTemplate="{StaticResource IsSelectedColumnTemplate}"
CanUserSort="True"
SortMemberPath="Orientation"
Width="Auto"
/>
</DataGrid.Columns>
</DataGrid>
</Grid>
and the related .cs content:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
ObservableCollection<DataObject> DataSource = new ObservableCollection<DataObject>();
DataSource.Add(new DataObject());
dataGrid.ItemsSource = DataSource;
}
}
public class DataObject : DependencyObject
{
public bool IsSelected
{
get { return (bool)GetValue(IsSelectedProperty); }
set { SetValue(IsSelectedProperty, value); }
}
// Using a DependencyProperty as the backing store for IsSelected. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IsSelectedProperty =
DependencyProperty.Register("IsSelected", typeof(bool), typeof(DataObject), new UIPropertyMetadata(false, OnIsSelectedChanged));
private static void OnIsSelectedChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
// this part is not reached
}
}
