Scrolling

PdfViewer has built-in scrolling mechanism.

The scrolling is available with the horizontal and vertical scrollbars of the control. You can scroll by dragging the scrollbars or by using the arrow keys of the keyboard, or by using the mouse wheel.

Programmatic Scrolling

RadPdfViewer is exposing the following properties related to the scrolling functionality that can be used to access or modify the scrolling behavior and appearance.

• HorizontalScrollBar—Holds a reference to the horizontal ScrollBar control. You can use this property to access the scrollbar and update its value or change its appearance.
• VerticalScrollBar—Holds a reference to the vertical ScrollBar control. You can use this property to access the scrollbar and update its value or change its appearance.
• CanHorizontallyScroll—Tells if the document can be scrolled horizontally. This property has only a getter and it is true when the horizontal scrollbar is rendered.
• CanVerticallyScroll—Tells if the document can be scrolled horizontally. This property has only a getter and it is true when the horizontal scrollbar is rendered.
• HorizontalScrollOffset—Gets the current horizontal scroll offset.
• VerticalScrollOffset—Gets the current vertical scroll offset.

To scroll manually, you can set the Value property of the ScrollBar elements. Or you can use the ScrollToHorizontalOffset and ScrollToVerticalOffset methods of RadPdfViewer.

Scroll to horizontal offset

this.pdfViewer.ScrollToHorizontalOffset(50); 

Scroll to vertical offset

this.pdfViewer.ScrollToVerticalOffset(50); 

The control also allows you to scroll to a specific position in the document with the GoToDestination method.

Scroll to destination

Destination destination = new Location() { Page = this.pdfViewer.Document.Pages[2], Left = 0, Top = 0, Zoom = 1 }; 
this.pdfViewer.GoToDestination(destination); 

See Also

• Rotation
• Text Position