WPF Scrolling

WPF Scrolling

In WPF you get scrolling support by wrapping the content control you want to add scrolling to with the ScrollViewer content control.

<ScrollViewer>
    <TextBlock LineHeight="20" Grid.Row="0">
    </TextBlock>
</ScrollViewer>

It adds a disabled scroll which changes to enabled if the content has overflowed the size of it’s container.

You may use the VerticalScrollBarVisibility="Auto" property of the ScrollViewer if you wish the scrollbar to appear only when enabled (it’s default state is Visible) and use HorizontalScrollBarVisibility="Visible" when the horizontal scrollbar is what you need.

ScrollViewer class holds several methods that allow you to programmatically scroll the content.

• LineUp() / LineDown() / LineLeft() / LineRight() -  Moves the scrollbar once up/down/left/right.
• PageUp() / PageDown() / PageLeft() / PageRight() -  Moves the scrollbar a full page up/down/left/right.
• ScrollToHome – scrolls to the top of the scrollable container.
• ScrollToEnd – scrolls to the bottom of the scrollable container.
• ScrollToVerticalOffset / ScrollToHorizontalOffset – scrolls to a specific position.

For example, scrolling to a specific position:
double _pos;
double.TryParse(PositionNum.Text,out _pos);
DemoScroller.ScrollToVerticalOffset(_pos);

You may download the demo code here.

Read Pro WPF in C# 2008 by Matthew Macdonald for more WPF stuff.