TreeNode.IsExpanded Property

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Source:

TreeNode.cs

Gets a value indicating whether the tree node is in the expanded state.

public:
 property bool IsExpanded { bool get(); };

[System.ComponentModel.Browsable(false)]
public bool IsExpanded { get; }

[<System.ComponentModel.Browsable(false)>]
member this.IsExpanded : bool

Public ReadOnly Property IsExpanded As Boolean

Property Value

Boolean

true if the tree node is in the expanded state; otherwise, false.

Attributes

BrowsableAttribute

Examples

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." ) );
   }
}

private void button1_Click(object sender, System.EventArgs e)
{
   if (treeView1.SelectedNode.IsExpanded)
   {
      treeView1.SelectedNode.Collapse();
      MessageBox.Show(treeView1.SelectedNode.Text + 
        " tree node collapsed.");
   }
   else
   {
      treeView1.SelectedNode.Expand();
      MessageBox.Show(treeView1.SelectedNode.Text + 
        " tree node expanded.");
   }
}

Private Sub button1_Click(sender As Object, _
  e As System.EventArgs) Handles button1.Click
   If treeView1.SelectedNode.IsExpanded Then
      treeView1.SelectedNode.Collapse()
      MessageBox.Show(treeView1.SelectedNode.Text & _ 
        " tree node collapsed.")
   Else
      treeView1.SelectedNode.Expand()
      MessageBox.Show(treeView1.SelectedNode.Text & _
        " tree node expanded.")
   End If
End Sub

See also

• Expand()
• ExpandAll()