void control_PropertyChanged(object sender, MapPropertyChangedEventArgs e)
{
Assert.IsInstanceOfType(sender, typeof(MapControl), "事件源不是MapControl");
MapControl control = (MapControl)sender;
Assert.IsTrue(e.NewValue != null && e.OldValue != null,"变更属性的旧值或者新值为空");
}
/// <summary>
/// 当依赖属性发生变化时，调用此方法。
/// </summary>
/// <param name="e">发生变化的依赖属性的变化详细信息。</param>
public virtual void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
{
if (PropertyChanged != null)
{
MapPropertyChangedEventArgs change = new MapPropertyChangedEventArgs(e.Property.Name, e.OldValue, e.NewValue);
PropertyChanged(this, change);
}
}
