TreeNode.Clone 方法

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

來源:

TreeNode.cs

複製樹節點及整個根植於此樹節點的子樹。

public:
 virtual System::Object ^ Clone();

public virtual object Clone();

abstract member Clone : unit -> obj
override this.Clone : unit -> obj

Public Overridable Function Clone () As Object

傳回

Object

那 Object 代表克隆的 TreeNode。

實作

Clone()

範例

以下程式碼範例克隆了最後根樹節點的最後一個子節點，並將該克隆插入為 TreeNodeCollection. 此範例要求你在 a 上有一個TreeView控制項，包含一組TreeNode物件和 Button。Form

void button4_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   TreeNode^ lastNode = treeView1->Nodes[ treeView1->Nodes->Count - 1 ]->Nodes[ treeView1->Nodes[ treeView1->Nodes->Count - 1 ]->Nodes->Count - 1 ];
   
   // Clone the last child node.
   TreeNode^ clonedNode = dynamic_cast<TreeNode^>(lastNode->Clone());
   
   // Insert the cloned node as the first root node.
   treeView1->Nodes->Insert( 0, clonedNode );
   MessageBox::Show( String::Concat( lastNode->Text, " tree node cloned and added to ", treeView1->Nodes[ 0 ]->Text ) );
}

private void button4_Click(object sender, System.EventArgs e)
{
   TreeNode lastNode = treeView1.Nodes[treeView1.Nodes.Count - 1].
     Nodes[treeView1.Nodes[treeView1.Nodes.Count - 1].Nodes.Count - 1];

   // Clone the last child node.
   TreeNode clonedNode = (TreeNode) lastNode.Clone();

   // Insert the cloned node as the first root node.
   treeView1.Nodes.Insert(0, clonedNode);
   MessageBox.Show(lastNode.Text + 
     " tree node cloned and added to " + treeView1.Nodes[0].Text);
}

Private Sub button4_Click(sender As Object, _
  e As System.EventArgs) Handles button4.Click
   Dim lastNode as TreeNode
   lastNode = treeView1.Nodes(treeView1.Nodes.Count - 1). _
     Nodes(treeView1.Nodes(treeView1.Nodes.Count - 1).Nodes.Count - 1)

   ' Clone the last child node.
   Dim clonedNode As TreeNode = CType(lastNode.Clone(), TreeNode)

   ' Insert the cloned node as the first root node.
   treeView1.Nodes.Insert(0, clonedNode)
   MessageBox.Show(lastNode.Text & _
     " tree node cloned and added to " & treeView1.Nodes(0).Text)
End Sub

備註

複製被複製的樹節點及其下方的樹狀結構。 任何分配給被複製的 TreeNode 子樹節點都會包含在新的樹節點和子樹中。

該 Clone 方法執行節點的淺層複製。 如果屬性 Tag 的值是參考型別，原始與複製的副本都會指向該值的同一單一實例 Tag 。

另請參閱

• Remove()