CODEWITHSUNDEEP
c#winformstreeview
Zhyke
Zhyke

Reputation: 447

Treeview Check/Uncheck Parent Node

I am using a TreeView control to list all my menus so that I can give access to each user. How I will forced the parent node to check = true when one or more childnode is checked by user?

I am using below code to check/uncheck all child nodes when parent node is checked.

private void treeView_AfterCheck(object sender, TreeViewEventArgs e)
 {
   if (e.Action != TreeViewAction.Unknown)
      {
        if (e.Node.Nodes.Count > 0)
          {
           CheckAllChildNodes(e.Node, e.Node.Checked);
           }
      }
 }

private void CheckAllChildNodes(TreeNode treeNode, bool nodeChecked)
 {
   foreach (TreeNode node in treeNode.Nodes)
   {
     node.Checked = nodeChecked;

     if (node.Nodes.Count > 0)
       {                   
         this.CheckAllChildNodes(node, nodeChecked);                  
       }
     }
  }

Upvotes: 1

Views: 1748

Answers (1)

fuchs777
fuchs777

Reputation: 1002

A TreeNode has a "Parent" property that should make it easy.
Untested code but should give you an idea.

private void CheckAllParentNodes(TreeNode treeNode, bool nodeChecked)
{
   TreeNode parentNode = treeNode.Parent;
   while (parentNode != null)
   {
     // check if parent has still checked child nodes
     if (parent.Nodes.Any(n => n.Checked)) return;

     parentNode.Checked = nodeChecked;
     parentNode = parentNode.Parent;
   }
}

Upvotes: 1

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