TreeNodeCollection.AddRange(TreeNode[]) Method

Definition

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

C#
public virtual void AddRange(System.Windows.Forms.TreeNode[] nodes);
C#
public virtual void AddRange(params System.Windows.Forms.TreeNode[] nodes);

Parameters

nodes
TreeNode[]

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

Exceptions

nodes is null.

nodes is the child of another TreeView.

Examples

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.

C#
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.
   myTreeViewBase.Nodes.CopyTo(myTreeNodeArray,0);
   // Remove all the tree nodes from the 'myTreeViewBase' TreeView.
   myTreeViewBase.Nodes.Clear();
   // Add the 'myTreeNodeArray' to the 'myTreeViewCustom' TreeView.
   myTreeViewCustom.Nodes.AddRange(myTreeNodeArray);
}

Remarks

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

Product Versions
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9

See also