Notifies clients that a property value has changed.
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 VB) or String.Empty as the property name in the System.ComponentModel.PropertyChangedEventArgs.
This example handles the PropertyChanged event.
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.
//
}