TreeNode::Expand Method ()
.NET Framework (current version)
Expands the tree node.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The following code example toggles the selected node when a button is clicked. If the selected node is collapsed, it is expanded, if it is expanded by calling the Expand method, it is collapsed by calling the Collapse method. This example requires that you have a Form with a TreeView control that has at least one TreeNode with at least one child TreeNode.
void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ ) { if ( treeView1->SelectedNode->IsExpanded ) { treeView1->SelectedNode->Collapse(); MessageBox::Show( String::Concat( treeView1->SelectedNode->Text, " tree node collapsed." ) ); } else { treeView1->SelectedNode->Expand(); MessageBox::Show( String::Concat( treeView1->SelectedNode->Text, " tree node expanded." ) ); } }
.NET Framework
Available since 1.1
Available since 1.1
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