Button inside a column header

[Vicenc]

Hi, I'm trying to create a button inside a column header and I'm facing binding problems. My code looks like this:

 

<telerik:RadGridView
            Name="RadGridView"
            CanUserSortColumns="False"
            ItemsSource="{Binding Stations}"
            IsFilteringAllowed="False"
            RowIndicatorVisibility="Collapsed"
            NewRowPosition="None"
            AutoGenerateColumns="False"
            IsReadOnly="True"
            ShowGroupPanel="False">
            <telerik:RadGridView.SortDescriptors>
                <telerik:SortDescriptor Member="Number" SortDirection="Ascending" />
            </telerik:RadGridView.SortDescriptors>
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn IsSortable="False">
                    <telerik:GridViewDataColumn.Header>
                        <Button
                            Style="{DynamicResource BorderlessButtonStyle}"
                            Loaded="FrameworkElement_OnLoaded"
                            BorderThickness="0"
                            Click="ButtonBase_OnClick"
                            Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:RadGridView}},Path=DataContext.CopyCommand}"
                            >
                   </telerik:GridViewDataColumn.Header>
                   ...

But the command is never invoked due to this error:

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='Telerik.Windows.Controls.RadGridView', AncestorLevel='1''. BindingExpression:Path=DataContext.CopyCommand; DataItem=null; target element is 'Button' (Name=''); target property is 'Command' (type 'ICommand') 

I've tried with other Ancestor levels with no luck.

I tried to workaround this problem setting the command in the Loaded event of the button and it works, but I have a similar problem trying to set a Binding with a converter for Visibility in code behind:

private void FrameworkElement_OnLoaded(object sender, RoutedEventArgs e)
{
    var button = (Button)sender;

    var viewModel = (TotalTideViewModel)this.DataContext;

    button.Command = viewModel.CopyCommand;
    var converter = new Converters.BooleanToVisibilityConverter();
    button.SetBinding(VisibilityProperty, new Binding("DataContext.IsAnyRowSelected")
        {
            Converter = converter
        });
}

I've seen in another threads that you recommend to create a static resource with the view model, but we are working using our client's framework and we are not allowed to do that.

 

How can I create a proper binding?

 

Thanks,

Vicenc

 

 

 

 

 

 

[Vicenc]

Hi,

looks like I was creating the binding in the wrong way. That's the code is working:

 

private void FrameworkElement_OnLoaded(object sender, RoutedEventArgs e)
{
    var button = (Button)sender;

    var viewModel = (TotalTideViewModel)this.DataContext;

    button.Command = viewModel.CopyCommand;
    var converter = new Converters.BooleanToVisibilityConverter();
    button.SetBinding(VisibilityProperty, new Binding()
    {
        Converter = converter,
        RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(RadGridView), 1),
        Path = new PropertyPath("DataContext.IsAnyRowSelected")
    });
}

 

Thanks,

Vicenc