TreeNode.Parent 属性

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

获取当前树节点的父树节点。

public:
 property System::Windows::Forms::TreeNode ^ Parent { System::Windows::Forms::TreeNode ^ get(); };

public System.Windows.Forms.TreeNode Parent { get; }

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.TreeNode Parent { get; }

member this.Parent : System.Windows.Forms.TreeNode

[<System.ComponentModel.Browsable(false)>]
member this.Parent : System.Windows.Forms.TreeNode

Public ReadOnly Property Parent As TreeNode

属性值

TreeNode

TreeNode，表示当前树节点的父树节点。

属性

BrowsableAttribute

示例

下面的代码示例显示Text由属性TreeView.SelectedNode表示Parent的和Index属性值TreeNode。 此示例要求你具有FormTreeView控件。 应 TreeView 至少有两个根节点，每个节点至少有一个子节点。

private:
   void treeView1_AfterSelect( Object^ /*sender*/, TreeViewEventArgs^ e )
   {
      /* Display the Text and Index of the
            * selected tree node's Parent. */
      if ( e->Node->Parent != nullptr && e->Node->Parent->GetType() == TreeNode::typeid )
      {
         statusBar1->Text = String::Format( "Parent: {0}\n Index Position: {1}", e->Node->Parent->Text, e->Node->Parent->Index );
      }
      else
      {
         statusBar1->Text = "No parent node.";
      }
   }

private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{  
   /* Display the Text and Index of the 
    * selected tree node's Parent. */
   if(e.Node.Parent!= null && 
     e.Node.Parent.GetType() == typeof(TreeNode) )
   {
      statusBar1.Text = "Parent: " + e.Node.Parent.Text + "\n"
         + "Index Position: " + e.Node.Parent.Index.ToString();
   }
   else
   {
      statusBar1.Text = "No parent node.";
   }
}

Private Sub treeView1_AfterSelect(sender As Object, _
  e As TreeViewEventArgs) Handles treeView1.AfterSelect
   ' Display the Text and Index of the 
   ' selected tree node's Parent. 
   If (e.Node.Parent IsNot Nothing) 
      If (e.Node.Parent.GetType() Is GetType(TreeNode)) Then
         statusBar1.Text = "Parent: " + e.Node.Parent.Text + _
           ControlChars.Cr + "Index Position: " + e.Node.Parent.Index.ToString()
      End If
   Else
      statusBar1.Text = "No parent node."
   End If
End Sub

注解

如果树节点位于根级别，则 Parent 属性返回 null。