Is there a way to associate a Command with a WPF Toolkit DataGridHyperlinkColumn?
Is there any way I ca开发者_如何学编程n associate a Command with a DataGridHyperlinkColumn? I've tried this:
<DataGridHyperlinkColumn Header="Client Name" Binding="{Binding ShortName}">
<DataGridHyperlinkColumn.ElementStyle>
<Style TargetType="TextBlock">
<Setter Property="Hyperlink.Command"
Value="{Binding DataContext.NavigateToClientCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:ClientsSummaryView}}}"/>
<Setter Property="Hyperlink.CommandParameter" Value="{Binding}"/>
</Style>
</DataGridHyperlinkColumn.ElementStyle>
</DataGridHyperlinkColumn>
At runtime, I can see that the binding is being correctly evaluated (the property getter for the Command is called), but the Command is not executed when I click the hyperlink. Is there a better way to do this?
Thanks,
Daniel
Are you sure the command is being associated with the hyperlink? I tried setting this up in a sample app, and the command wasn't being associated with the hyperlink (if you return false from CanExecute
, you'll be able to quickly determine if it is wired up).
Instead, I created a DataGridTemplateColumn
to accomplish this:
<DataGridTemplateColumn Header="Client Name">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock>
<Hyperlink Command="{Binding DataContext.NavigateToClientCommand, RelativeSource={RelativeSource AncestorType={x:Type local:ClientsSummaryView}}}"
CommandParameter="{Binding ShortName}">
<TextBlock Text="{Binding ShortName}" />
</Hyperlink>
</TextBlock>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
This would get really annoying if you had to create multiple columns. After cracking open the Toolkit with Reflector, it looks like it is supporting the TargetName
/ NavigationUrl
paradigm for using the hyperlink.
If you have a scenario where you would require this type of column in many places, I would suggest extending the DataGridHyperlinkColumn
and adding a Command property. You could then modify the element returned from GenerateElement
so that it used your command.
Yes, but not with the standard DataGridHyperlinkColumn
. You need to enhance that class a little.
public class DataGridHyperlinkColumn : System.Windows.Controls.DataGridHyperlinkColumn
{
/// <summary>
/// Support binding the hyperlink to an ICommand rather than a Uri
/// </summary>
public BindingBase CommandBinding { get; set; }
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
{
var result = base.GenerateElement(cell, dataItem);
if (((TextBlock)result).Inlines.FirstInline is Hyperlink link)
BindingOperations.SetBinding(link, Hyperlink.CommandProperty, CommandBinding);
return result;
}
}
After setting up the correct namespace mapping you can then do this:
<c:DataGridHyperlinkColumn Header="Booking" Binding="{Binding Path=ReservationNo}" CommandBinding="{Binding Path=NavigateCommand}" />
This assumes that NavigateCommand
exists on your viewmodel object.
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