PropertyChanged Event

Occurs when a property value in this ImageViewerchanges.

Syntax

WinRT C#
WinRT JavaScript

public event PropertyChangedEventHandler PropertyChanged

add_PropertyChanged(function(sender, e))
remove_PropertyChanged(function(sender, e))

Event Data

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.

Remarks

Most of the properties of this ImageViewer will fire the PropertyChanged event when the value changes. When this happens, the value of PropertyChangedEventArgs.PropertyName of the event data will be set to the name of the property that was changed. For example, the PropertyChangedEventArgs.PropertyName will be set to "ScaleFactor" when ScaleFactor changes and "ScrollOffset" when ScrollOffset changes.

System.ComponentModel.PropertyChangedEventArgs

Example

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

Copy Code

[TestMethod]
public void PropertyChangedExample()
{
   // Hook to the property changed event of the viewer
   _viewer.PropertyChanged += _viewer_PropertyChanged;
   _viewer.ScrollOffset = new Point(100, 100);
}
void _viewer_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
   // Check the property name, we are interested in "ScaleFactor" and "ScrollOffset"
   string  propertyName = e.PropertyName;
   if (propertyName == "ScaleFactor" || propertyName == "ScrollOffset")
   {
      _infoLabel.Text = propertyName + "Changed";
   }
}

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

ImageViewer Class
ImageViewer Members