void DoNotify(string propertyName)
{
PropertyChangedEventHandler h = this.PropertyChanged;
if (h != null)
{
h.BeginInvoke(this, new PropertyChangedEventArgs(propertyName), null, null);
}
}
/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// propertychangedeventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this PropertyChangedEventHandler propertychangedeventhandler, Object sender, PropertyChangedEventArgs e, AsyncCallback callback)
{
if (propertychangedeventhandler == null)
{
throw new ArgumentNullException("propertychangedeventhandler");
}
return(propertychangedeventhandler.BeginInvoke(sender, e, callback, null));
}
public static void InvokeEventHandlerAsync(PropertyChangedEventHandler eventHandler, object sender, PropertyChangedEventArgs e)
{
if ((object)eventHandler == null)
{
throw new ArgumentNullException("eventHandler");
}
System.Delegate[] invocationList = eventHandler.GetInvocationList();
for (int i = 0; i < invocationList.Length; i++)
{
PropertyChangedEventHandler currentEventHandler = (PropertyChangedEventHandler)invocationList[i];
currentEventHandler.BeginInvoke(sender, e, new AsyncCallback(currentEventHandler.EndInvoke), null);
}
}
