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TreeNodeCollection.IsReadOnly Property

Gets a value indicating whether the collection is read-only.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public bool IsReadOnly { get; }

Property Value

Type: System.Boolean
true if the collection is read-only; otherwise, false. The default is false.

Implements

IList.IsReadOnly

The following code example removes the selected tree node from one TreeView and adds it to another if both tree node collections are not read-only. When a Button is clicked, the TreeNode represented by the TreeView.SelectedNode property is deleted from one TreeView using the Remove method and added to the other TreeView using the Insert method. This example requires that you have a Form that contains two TreeView controls and a Button. The TreeView controls should be named treeView1 and treeView2.


private void button1_Click(object sender, EventArgs e)
{
   // If neither TreeNodeCollection is read-only, move the 
   // selected node from treeView1 to treeView2.
   if(!treeView1.Nodes.IsReadOnly && !treeView2.Nodes.IsReadOnly)
   {
      if(treeView1.SelectedNode != null)
      {
         TreeNode tn = treeView1.SelectedNode;
         treeView1.Nodes.Remove(tn);
         treeView2.Nodes.Insert(treeView2.Nodes.Count, tn);
      }
   }
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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