DataGrid: replacing a DataGridTextColumn with DataGridTemplateColumn - how to make Binding work

Question

I have a WPF Datagrid with a few DataGridTextColumns and I want to repace one with my own custom control. However I can't figure out how to bind.

<DataGrid ItemsSource="{Binding Path=Entries, Mode=OneWay}" IsSynchronizedWithCurrentItem="True">      
    <DataGrid.Columns>
        <DataGridTextColumn Header="Comment" Binding="{Binding Path=Comment}" Width="Auto" />
    </DataGrid.Columns>
</DataGrid>

I have replaced it with:

<DataGrid ItemsSource="{Binding Path=Entries, Mode=OneWay}" IsSynchronizedWithCurrentItem="True">
    <DataGrid.Columns>
        <DataGridTemplateColumn Header="Comment" Width="Auto">
            <DataGridTemplateColumn.CellEditingTemplate>
                <DataTemplate>
                    <StackPanel>
                        <x:customTextBox Text="{Binding Path=Comment}" />
                    </StackPanel>
                </DataTemplate>
            </DataGridTemplateColumn.CellEditingTemplate>
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Path=Comment}" />
                    </StackPanel>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

I also tried to set a RelativeSource without any success. Do you have any suggestions how to solve this?

Answer 1

This works for me using a textbox instead of whatever your control is.

<Window.DataContext>
    <local:MainWindowViewModel/>
</Window.DataContext>
<Grid>
    <DataGrid ItemsSource="{Binding Path=Entries, Mode=OneWay}" IsSynchronizedWithCurrentItem="True"
              AutoGenerateColumns="False"
              >
        <DataGrid.Columns>
            <DataGridTemplateColumn Header="Comment" Width="Auto">
                <DataGridTemplateColumn.CellEditingTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <TextBox Text="{Binding Path=Comment}" />
                        </StackPanel>
                    </DataTemplate>
                </DataGridTemplateColumn.CellEditingTemplate>
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <TextBlock Text="{Binding Path=Comment}" />
                        </StackPanel>
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
        </DataGrid.Columns>
    </DataGrid>
</Grid>
</Window>
enter code here

MyItem is a viewmodel I happened to have in a scratch app.

public partial class MainWindowViewModel : ObservableObject
{

    [ObservableProperty]
    private ObservableCollection<MyItem> entries = new ObservableCollection<MyItem>
    (
        new List<MyItem>
        {
             new MyItem{ IsChosen = false},
             new MyItem{ IsChosen = true },
             new MyItem{ IsChosen = true }
        }
    );
}

Looks like

public partial class MyItem : ObservableObject
{
    [ObservableProperty]
    private bool? isChosen;

    [ObservableProperty]
    private string comment = "Some test string";
}