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BeginUpdate Method
See Also 
Leadtools.Windows.Controls Namespace > ImageViewer Class : BeginUpdate Method



Stops the viewer from being updated if any change is applied. This is useful to increase the control speed efficiency. Supported in Silverlight, Windows Phone 7

Syntax

Visual Basic (Declaration) 
Public Overridable Sub BeginUpdate()
Visual Basic (Usage)Copy Code
Dim instance As ImageViewer
 
instance.BeginUpdate()
C# 
public virtual void BeginUpdate()
C++/CLI 
public:
virtual void BeginUpdate();

Example

For C#/VB examples, refer to Flip.

Remarks

The BeginUpdate method will cause the control not to call the System.Windows.UIElement.InvalidateMeasure method when any changes to the control properties or the image is applied. When the user calls the EndUpdate method, the viewer will call System.Windows.UIElement.InvalidateMeasure to show all the changes made. This is useful for better visual results and for speed efficiency.

Calls to BeginUpdate and EndUpdate are accumulative. You can call BeginUpdate as many times as you want. You must call the EndUpdate method each time you call BeginUpdate in orderto ensure the update will happen.

Requirements

Target Platforms: Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family

See Also