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How to Hide TreeView Node?

• • Reply

  4 years ago

  by csharpvijay

  csharpvijay

  , United States

  Joined 4 years ago
  Hi,
  
  I want to hide treeview particular node. Can you anybody help me?
  
  Thanks,
  Vijay
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• • Reply

  4 years ago

  by LeeWitherington

  Lee Witherington

  Manchester, England, United States

  Joined 4 years ago

  why dont you just remove the Item from the Tree Item collection, then re-add when your ready?
  

  
  

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• • Reply

  4 years ago

  by csharpvijay

  csharpvijay

  , United States

  Joined 4 years ago

  Thanks for your reply. I got an idea. But one small doubt. Can you tell me where can I store the node(best way) when I removed it from treeview?
  

  
  

  
  Regards,
  Vijay

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• • Reply

  4 years ago

  by Rollershade

  Colin Harman MACITP

  West Sussex, England, Australia

  Joined 7 years ago

  a way to do it would be to group the nodes, then collapsae and expand when you want the nodes, so ive added nodes like this
  

  
  

  Code:

  
             //ADD NODES
             treeView1.Nodes.Clear();
             TreeNode t1 = treeView1.Nodes.Add("Top pn");
             t1.Nodes.Add("level 1");
             t1.Nodes.Add("level 1");
             t1.Nodes.Add("level 1");
             TreeNode t2 = t1.Nodes.Add("level 1");
             t2.Nodes.Add("level 1 - level 2");
             t2.Nodes.Add("level 1 - level 2");
             t2.Nodes.Add("level 1 - level 2");
             //SHOW ALL EXPANDED
             treeView1.ExpandAll();
  

  
  

  
  now i want to close the level 1  - level 2 nodes like
  

  
  

  Code:

  
             //Hide node
             treeView1.Nodes[0].Nodes[3].Nodes[0].Parent.Collapse();
  

  
  

  
  now to make sure they dont click those nodes out again, trap the click events and see if its the node being expanded like
  

  
  

  Code:

  
             TreeNode n = treeView1.Nodes[0].Nodes[3].Nodes[0].Parent;
             if (n == e.Node)
             {
                 //CANCEL EXPAND
                 e.Cancel=true;
                 MessageBox.Show("You cant access this at the  moment");
             }
  

  
  

  
  ovbiously you would have to have a bool variable running to see if it was aloud to beopened something like
  

  
  

  Code:

  
  bool LetOpen = false;
         private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e)
         {
             TreeNode n = treeView1.Nodes[0].Nodes[3].Nodes[0].Parent;
             if (n == e.Node&& LetOpen==false)
             {
                 //CANCEL EXPAND
                 e.Cancel=true;
                 MessageBox.Show("You cant access this at the  moment");
             }
         }
  

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• • Reply

  2 years ago

  by galacticosfan

  aditya thatte

  pune, India

  Joined 2 years ago
  hi,
      i want to hide a particular node in a tree view on the occurrence of  a particular condition
  for eg..if(x=y) then show node
  is there any property of tree node which wud hide it or change visibility
  
  aditya .
  
  
  
  
  
  
  
  
  
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• • Reply

  2 years ago

  by pjorge

  Pedro Xavier Jorge

  , Portugal

  Joined 2 years ago

  TreeView1.Nodes.RemoveAt(i);

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• • Reply

  2 years ago

  by pjorge

  Pedro Xavier Jorge

  , Portugal

  Joined 2 years ago

  TreeView1.Nodes.RemoveAt(NodeIndex);

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