Set Can Content Scroll of TaskBoard Columns

Environment

Product Version	2025.3.813
Product	RadTaskBoard for WPF

Description

Set the CanContentScroll property of the ScrollViewer element on the RadTaskBoard control's columns.

Solution

The columns of the control are represented by the TaskBoardColumnContainer element. It contains a ScrollViewer in its ControlTemplate, which has its CanContentScroll property set to True.

To customize this, you can create a new attached property for the TaskBoardColumnContainer element and retrieve its ScrollViewer on the Loaded event. To do so, you can use the ChildrenOfType extension method.

To set the attached property, create an implicit Style that targets the TaskBoardColumnContainer element.

Defining the attached property for setting the CanContentScroll of the ScrollViewer

public class TaskBoardColumnContainerExtensions 
{ 
    public static bool GetCanContentScroll(DependencyObject obj) 
    { 
        return (bool)obj.GetValue(CanContentScrollProperty); 
    } 
 
    public static void SetCanContentScroll(DependencyObject obj, bool value) 
    { 
        obj.SetValue(CanContentScrollProperty, value); 
    } 
 
    public static readonly DependencyProperty CanContentScrollProperty = 
        DependencyProperty.RegisterAttached("CanContentScroll", typeof(bool), typeof(TaskBoardColumnContainerExtensions), new PropertyMetadata  (true, OnCanContentScrollChanged)); 
 
    private static void OnCanContentScrollChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
    { 
        TaskBoardColumnContainer taskBoardColumnContainer = (TaskBoardColumnContainer)d; 
 
        taskBoardColumnContainer.Dispatcher.BeginInvoke(() =>  
        { 
            ScrollViewer scrollViewer = taskBoardColumnContainer.ChildrenOfType<ScrollViewer>().FirstOrDefault(); 
 
            if (scrollViewer != null) 
            { 
                scrollViewer.CanContentScroll = (bool)e.NewValue; 
            } 
        }); 
    } 
} 

Applying the attached property to the TaskBoardColumnContainer element

<!-- If NoXaml is used: BasedOn="{StaticResource TaskBoardColumnContainerStyle}" --> 
<Style TargetType="taskboard:TaskBoardColumnContainer"> 
    <Setter Property="local:TaskBoardColumnContainerExtensions.CanContentScroll" Value="False"/> 
</Style>