LEADTOOLS Annotations for WPF and Silverlight (Leadtools.Windows.Annotations assembly) Send comments on this topic. | Back to Introduction - All Topics | Help Version 17.0.3.31
OnBeforeObjectChanged Method
See Also 
Leadtools.Windows.Annotations Namespace > AnnAutomation Class : OnBeforeObjectChanged Method



e
An AnnBeforeObjectChangedEventArgs that contains the event data.

The OnBeforeObjectChanged Method supports WPF/Silverlight.

The OnBeforeObjectChanged Method is available in LEADTOOLS Document and Medical Imaging toolkits.

e
An AnnBeforeObjectChangedEventArgs that contains the event data.
Raises the AnnAutomation.BeforeObjectChanged event. Supported in Silverlight, Windows Phone 7

Syntax

Visual Basic (Declaration) 
Protected Overridable Sub OnBeforeObjectChanged( _
   ByVal e As AnnBeforeObjectChangedEventArgs _
) 
Visual Basic (Usage)Copy Code
Dim instance As AnnAutomation
Dim e As AnnBeforeObjectChangedEventArgs
 
instance.OnBeforeObjectChanged(e)
C# 
protected virtual void OnBeforeObjectChanged( 
   AnnBeforeObjectChangedEventArgs e
)
C++/CLI 
protected:
virtual void OnBeforeObjectChanged( 
   AnnBeforeObjectChangedEventArgs^ e
) 

Parameters

e
An AnnBeforeObjectChangedEventArgs that contains the event data.

Example

For C#/VB examples, refer to AnnAutomation.BeforeObjectChanged.

Remarks

Raising an event invokes the event handler through a delegate. The OnBeforeObjectChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class. Notes to Inheritors: When overriding OnBeforeObjectChanged in a derived class, be sure to call the base class's OnBeforeObjectChanged method so that registered delegates receive the event.

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also

OnBeforeObjectChanged requires a Document/Medical product license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features and Unlocking Special LEAD Features.