TreeNode.Handle 属性

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

Source:

TreeNode.cs

获取树节点的句柄。

public:
 property IntPtr Handle { IntPtr get(); };

[System.ComponentModel.Browsable(false)]
public IntPtr Handle { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Handle : nativeint

Public ReadOnly Property Handle As IntPtr

属性值

IntPtr

nativeint

树节点句柄。

属性

BrowsableAttribute

示例

下面的代码示例获取 TreeNode 已折叠并使用其属性创建它 Handle 的副本。 TreeNode原始副本已从集合TreeNodeCollection中删除，并将副本添加到集合中。 此示例要求你具有 Form 一个 TreeView 控件。 控件 TreeView 应具有两个或更多个根节点，每个节点至少有一个子节点。

private:
   void treeView1_AfterCollapse( Object^ /*sender*/, TreeViewEventArgs^ e )
   {
      // Create a copy of the e.Node from its Handle.
      TreeNode^ tn = TreeNode::FromHandle( e->Node->TreeView, e->Node->Handle );
      tn->Text = String::Concat( tn->Text, "Copy" );

      // Remove the e.Node so it can be replaced with tn.
      e->Node->Remove();

      // Add tn to the TreeNodeCollection.
      treeView1->Nodes->Add( tn );
   }

private void treeView1_AfterCollapse(object sender, TreeViewEventArgs e)
{
   // Create a copy of the e.Node from its Handle.
   TreeNode tn = TreeNode.FromHandle(e.Node.TreeView, e.Node.Handle);
   tn.Text += "Copy";
   // Remove the e.Node so it can be replaced with tn.
   e.Node.Remove();
   // Add tn to the TreeNodeCollection.
   treeView1.Nodes.Add(tn);
}

Private Sub treeView1_AfterCollapse(sender As Object, _
  e As TreeViewEventArgs) Handles treeView1.AfterCollapse
   ' Create a copy of the e.Node from its Handle.
   Dim tn As TreeNode = TreeNode.FromHandle(e.Node.TreeView, e.Node.Handle)
   tn.Text += "Copy"
   ' Remove the e.Node so it can be replaced with tn.
   e.Node.Remove()
   ' Add tn to the TreeNodeCollection.
   treeView1.Nodes.Add(tn)
End Sub

注解

如果引用属性时 Handle 尚未创建句柄，则会创建该句柄。