WPF 첨부 된 동작을 정의 할 때 이러한 메서드가 필요한 이유는 무엇입니까?

Question

이 두 방법은 어디에도 호출되지 않습니다. 그들이 부착 된 행동을 사용하기 위해 필요합니까 아니면 재산을 얻기위한 편리한 편의성입니까? http://www.codeproject.com/Articles/28959/Introduction-to-Attached-Behaviors-in-WPF

public static class TreeViewItemBehavior 
{ 
    #region IsBroughtIntoViewWhenSelected 

    public static bool GetIsBroughtIntoViewWhenSelected(TreeViewItem treeViewItem) 
    { 
     return (bool)treeViewItem.GetValue(IsBroughtIntoViewWhenSelectedProperty); 
    } 

    public static void SetIsBroughtIntoViewWhenSelected(
     TreeViewItem treeViewItem, bool value) 
    { 
     treeViewItem.SetValue(IsBroughtIntoViewWhenSelectedProperty, value); 
    } 

    public static readonly DependencyProperty IsBroughtIntoViewWhenSelectedProperty = 
     DependencyProperty.RegisterAttached(
     "IsBroughtIntoViewWhenSelected", 
     typeof(bool), 
     typeof(TreeViewItemBehavior), 
     new UIPropertyMetadata(false, OnIsBroughtIntoViewWhenSelectedChanged)); 

    static void OnIsBroughtIntoViewWhenSelectedChanged(
     DependencyObject depObj, DependencyPropertyChangedEventArgs e) 
    { 
     TreeViewItem item = depObj as TreeViewItem; 
     if (item == null) 
      return; 

     if (e.NewValue is bool == false) 
      return; 

     if ((bool)e.NewValue) 
      item.Selected += OnTreeViewItemSelected; 
     else 
      item.Selected -= OnTreeViewItemSelected; 
    } 

    static void OnTreeViewItemSelected(object sender, RoutedEventArgs e) 
    { 
     // Only react to the Selected event raised by the TreeViewItem 
     // whose IsSelected property was modified. Ignore all ancestors 
     // who are merely reporting that a descendant's Selected fired. 
     if (!Object.ReferenceEquals(sender, e.OriginalSource)) 
      return; 

     TreeViewItem item = e.OriginalSource as TreeViewItem; 
     if (item != null) 
      item.BringIntoView(); 
    } 

    #endregion // IsBroughtIntoViewWhenSelected 

Answer 1

없음을의 예에서

public static bool GetIsBroughtIntoViewWhenSelected(TreeViewItem treeViewItem) 
{ 
    return (bool)treeViewItem.GetValue(IsBroughtIntoViewWhenSelectedProperty); 
} 

public static void SetIsBroughtIntoViewWhenSelected(
    TreeViewItem treeViewItem, bool value) 
{ 
    treeViewItem.SetValue(IsBroughtIntoViewWhenSelectedProperty, value); 
} 

전체 코드; 그들은 필요하지 않습니다.

이들은 단순히 C# 코드의 속성과 상호 작용하기위한 편리한 방법입니다. 필요하지 않으면 쓸 필요가 없습니다.