private static void OnValueChanged(DependencyObject dp, DependencyPropertyChangedEventArgs args)
{
//如果值没有发生变化，退出
if ((args.NewValue != null && args.NewValue.Equals(args.OldValue)) || (args.NewValue == null && args.OldValue == null))
{
return;
}
PropertySetter ps = (PropertySetter)dp;
//给属性赋值
if (ps != null && ps.Object != null)
{
PropertyInfo pi = ps.Object.GetType().GetProperty(ps.PropertyName);
//没有属性，或者是动态属性，调用动态属性的做法，否则，调用CLR属性的做法
if (pi == null || pi is CustomPropertyInfoHelper)
{
ps.Object.SetPropertyValue(ps.PropertyName, ps.Value, false);
}
else
{
pi.SetValue(ps.Object, ps.Value, null);
}
}
}
