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TreeNodeCollection.AddRange(TreeNode[]) Method


Adds an array of previously created tree nodes to the collection.

 virtual void AddRange(cli::array <System::Windows::Forms::TreeNode ^> ^ nodes);
 virtual void AddRange(... cli::array <System::Windows::Forms::TreeNode ^> ^ nodes);
public virtual void AddRange (System.Windows.Forms.TreeNode[] nodes);
public virtual void AddRange (params System.Windows.Forms.TreeNode[] nodes);
abstract member AddRange : System.Windows.Forms.TreeNode[] -> unit
override this.AddRange : System.Windows.Forms.TreeNode[] -> unit
Public Overridable Sub AddRange (nodes As TreeNode())
Public Overridable Sub AddRange (ParamArray nodes As TreeNode())



An array of TreeNode objects representing the tree nodes to add to the collection.


nodes is null.

nodes is the child of another TreeView.


The following code example copies the TreeNodeCollection from a TreeView to a temporary Array, and then adds the contents of the array to another TreeView using the AddRange method. The TreeNodeCollection from the source TreeView is cleared using the Clear method. This example requires that you have two TreeView controls, one with a collection of TreeNode objects.

   void MyButtonAddAllClick( Object^ /*sender*/, EventArgs^ /*e*/ )
      // Get the 'myTreeNodeCollection' from the 'myTreeViewBase' TreeView.
      TreeNodeCollection^ myTreeNodeCollection = myTreeViewBase->Nodes;
      // Create an array of 'TreeNodes'.
      array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(myTreeViewBase->Nodes->Count);
      // Copy the tree nodes to the 'myTreeNodeArray' array.
      myTreeViewBase->Nodes->CopyTo( myTreeNodeArray, 0 );
      // Remove all the tree nodes from the 'myTreeViewBase' TreeView.
      // Add the 'myTreeNodeArray' to the 'myTreeViewCustom' TreeView.
      myTreeViewCustom->Nodes->AddRange( myTreeNodeArray );
private void MyButtonAddAllClick(object sender, EventArgs e)
   // Get the 'myTreeNodeCollection' from the 'myTreeViewBase' TreeView.
   TreeNodeCollection myTreeNodeCollection = myTreeViewBase.Nodes;
   // Create an array of 'TreeNodes'.
   TreeNode[] myTreeNodeArray = new TreeNode[myTreeViewBase.Nodes.Count];
   // Copy the tree nodes to the 'myTreeNodeArray' array.
   // Remove all the tree nodes from the 'myTreeViewBase' TreeView.
   // Add the 'myTreeNodeArray' to the 'myTreeViewCustom' TreeView.
Private Sub MyButtonAddAllClick(sender As Object, e As EventArgs)
   ' Get the 'myTreeNodeCollection' from the 'myTreeViewBase' TreeView.
   Dim myTreeNodeCollection As TreeNodeCollection = myTreeViewBase.Nodes
   ' Create an array of 'TreeNodes'.
   Dim myTreeNodeArray(myTreeViewBase.Nodes.Count-1) As TreeNode
   ' Copy the tree nodes to the 'myTreeNodeArray' array.
   myTreeViewBase.Nodes.CopyTo(myTreeNodeArray, 0)
   ' Remove all the tree nodes from the 'myTreeViewBase' TreeView.
   ' Add the 'myTreeNodeArray' to the 'myTreeViewCustom' TreeView.
End Sub


The TreeNode objects contained in the nodes array are appended to the end of the collection.

You can use the AddRange method to quickly add a group of previously created TreeNode objects to the collection instead of manually adding each TreeNode to the collection using the Add method.

To remove a TreeNode that you previously added, use the Remove, RemoveAt, or Clear methods.

Applies to

See also