PropertyChanged Event (WebImageViewer)

C#
Visual Basic
Objective-C
Java
C++

public event PropertyChangedEventHandler PropertyChanged

'Declaration
 
Public Event PropertyChanged As PropertyChangedEventHandler

'Usage
 
Dim instance As WebImageViewer
Dim handler As PropertyChangedEventHandler
 
AddHandler instance.PropertyChanged, handler

public:
event PropertyChangedEventHandler^ PropertyChanged

The event handler receives an argument of type PropertyChangedEventArgs containing data related to this event. The following PropertyChangedEventArgs properties provide information specific to this event.

Property	Description
PropertyName	Gets the name of the property that changed.

The PropertyChanged event can indicate all properties on the object have changed by using either a null reference (Nothing in Visual Basic) or String.Empty as the property name in the System.ComponentModel.PropertyChangedEventArgs.

This example handles the PropertyChanged event.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.Web.Controls

<TestMethod()> _
Public Sub WebImageViewer_PropertyChanged()
   Dim mainWebImageViewer As WebImageViewer = New WebImageViewer()
   AddHandler mainWebImageViewer.PropertyChanged, New System.ComponentModel.PropertyChangedEventHandler(AddressOf mainWebImageViewer_PropertyChanged)
   ''
   '' update some properties values
   ''
   AddHandler mainWebImageViewer.PropertyChanged, New System.ComponentModel.PropertyChangedEventHandler(AddressOf mainWebImageViewer_PropertyChanged)
End Sub

Sub mainWebImageViewer_PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs)
   If (e.PropertyName = "ScaleFactor") Then
      '' ScaleFactor property changed.
   ElseIf (e.PropertyName = "SizeMode") Then
      '' SizeMode property changed.

      ''
      ''etc.
      ''
   End If
End Sub

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Web.Controls;
using Leadtools.ImageProcessing;

public void WebImageViewer_PropertyChanged()
{
   WebImageViewer mainWebImageViewer = new WebImageViewer();
   mainWebImageViewer.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(mainWebImageViewer_PropertyChanged);
   //
   // update some properties values
   //

   mainWebImageViewer.PropertyChanged -= new System.ComponentModel.PropertyChangedEventHandler(mainWebImageViewer_PropertyChanged);
}
void mainWebImageViewer_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
   if(e.PropertyName == "ScaleFactor")
   {
      // ScaleFactor property changed.
   }
   else if(e.PropertyName == "SizeMode")
   {
      // SizeMode property changed.
   }
   //
   //etc.
   //
}

Target Platforms

Reference

WebImageViewer Class
WebImageViewer Members
WebImageViewer Client Class