TreeNodeCollection::Clear Method ()
.NET Framework (current version)
Removes all tree nodes from the collection.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
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.
private: 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. myTreeViewBase->Nodes->Clear(); // Add the 'myTreeNodeArray' to the 'myTreeViewCustom' TreeView. myTreeViewCustom->Nodes->AddRange( myTreeNodeArray ); }
.NET Framework
Available since 1.1
Available since 1.1
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