Zoom Property (Viewer)

In This Topic

Gets or sets the viewer's zoom level. 1 for FitWidth mode 2 for Fit Whole Page mode. Throws ArgumentOutOfRangeException on invalid value.

Syntax

Visual Basic
C#

'Declaration
 
Public Property Zoom As Single

public float Zoom {get; set;}

Property Value

The zoom level of the viewer, where:

-1 indicates Fit Width mode,
-2 indicates Fit Whole Page mode,
A positive value indicates a specific zoom level (e.g., 1.0 for 100%).

Exceptions

Exception	Description
System.ArgumentOutOfRangeException	Thrown when the value is less than -2 or equal to 0.
System.InvalidOperationException	Thrown when attempting to set the zoom level while in a mode where zoom is not enabled.

Remarks

The default value is 1f, which corresponds to 100% zoom.

Setting the zoom level to -1 or -2 adjusts the view to fit the width or the entire page within the viewer's display area, respectively. Specifying a positive value sets the zoom to that specific level.

Example

// Assuming 'viewer' is an instance of the Viewer class
viewer.Zoom = 1f; // 100% zoom
viewer.Zoom = -2; // Fit Whole Page
viewer.Zoom = 1.5f; // 150% zoom

Reference

Viewer Class
Viewer Members