User can only select child of branch at time - treeview RSS

• • Reply
  

  hapytran

  Member

  82 Points

  41 Posts

  User can only select child of branch at time - treeview

  Sep 05, 2009 03:32 AM|LINK

  Hi All,

  I have a treeview like this:
  

  [-] Node1
      [] Child1
      [] Child2
      [] Child3
      [] Child4
  [-] Node2
      [] Child1    
  [-] Node3
      [-] Child1
          [] Childx
          [] Childy
      [+] Child2    
  [-] Node4
      [-] Child1
          [-] Child2
              [+] Child3
          [] Child4
          [] Child5
      [] Child6
      [] Child7

  At time, Can we force user works only on one branch of tree. For example, if user check one child of "Node1" (or multi), uncheck all child nodes of "Node2", "Node3", "Node4". Apply same for Node2, Node3, ...

  Thanks for help.

  Eric.
  

• • Reply
  

  hapytran

  Member

  82 Points

  41 Posts

  Re: User can only select child of branch at time - treeview

  Sep 06, 2009 12:06 AM|LINK

  It seems that we can not do it at client side. Below is code at server side:

  protected void TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)
      {
          string[] path = e.Node.ValuePath.Split('/');
          //collapse other nodes
          foreach (TreeNode node in trvTargetMarket.Nodes)
          {
              if (node.Value != path[0])
              {
                  UnSelectedNodes(node.ChildNodes);
                  //node.Collapse();
              }
          }
      }
  
  
  protected void UnSelectedNodes(TreeNodeCollection nodes)
      {
          foreach (TreeNode node in nodes)
          {
              if (node.Checked)
              {
                  node.Checked = false;
              }
              if (node.ChildNodes.Count > 0)
                  UnSelectedNodes(node.ChildNodes);
          }
      }