5. 完整的自定義依賴屬性
5.1 定義
/// <summary>/// 標識 Title 依賴屬性。/// </summary>public static readonly DependencyProperty TitleProperty =
DependencyProperty.Register("Title", typeof(string), typeof(MyPage), new PropertyMetadata(string.Empty));/// <summary>/// 獲取或設(shè)置Content的值/// </summary> public object Content{
get { return (object)GetValue(ContentProperty); }
set { SetValue(ContentProperty, value); }}/// <summary>/// 標識 Content 依賴屬性。/// </summary>public static readonly DependencyProperty ContentProperty =
DependencyProperty.Register("Content", typeof(object), typeof(MyPage), new PropertyMetadata(null, OnContentChanged));private static void OnContentChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args){
MyPage target = obj as MyPage;
object oldValue = (object)args.OldValue;
object newValue = (object)args.NewValue;
if (oldValue != newValue) target.OnContentChanged(oldValue, newValue);}protected virtual void OnContentChanged(object oldValue, object newValue){}以上代碼為一個相對完成的依賴屬性例子（還有一些功能比較少用就不寫出了），從這段代碼可以看出，自定義依賴屬性的步驟如下：
