Check box treeview event asp.net c#

Question

2.00/5 (3 votes)

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Hi,

I am trying to create a code where if I click the Parent node it will check all the childnode under that parent node. I used the

OnTreeNodeCheckChanged

event. But when I click the parent nodes it won't work. Here is my code behind:

C#

protected void trSubInd_CheckChanged(Object sender, TreeNodeEventArgs e)
       {
           //foreach (TreeNode node in trSubInd.CheckedNodes)//loops on the checked nodes
           //{
               if (e.Node.ChildNodes.Count > 0)//if parent node
               {
                   if (e.Node.Checked)
                       ChangeChecked(e.Node, true);
                   else
                       ChangeChecked(e.Node, false);
               }
           //}
       }

       private void ChangeChecked(TreeNode node, bool check)
       {
           // "Queue" up child nodes to be checked or unchecked.
           if (node.ChildNodes.Count > 0)
           {
               for (int i = 0; i < node.ChildNodes.Count; i++)
                   ChangeChecked(node.ChildNodes[i], check);
           }

           node.Checked = check;
       }

here is my aspx code:

XML

<asp:TreeView ID="trSubInd" Runat="server" Width="159px" Height="177px" ShowCheckBoxes="All" OnSelectedNodeChanged="trSubInd_CheckChanged">
                </asp:TreeView>

Any help is greatly appreciated.

Thanks,

Posted 7-Aug-12 5:14am

Franco Cipriano

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Comments

ZurdoDev 7-Aug-12 12:14pm

What is it doing? Is it posting back and running your code?

3 solutions

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chandrika patel · Answer 1 · 2013-02-19T21:24:00

Solution 2

I check the Parent node it will check all the childnode under that parent node without OnSelectedNodeChanged event.

Posted 19-Feb-13 21:24pm

chandrika patel

Member 10684571 · Answer 2 · 2014-07-03T19:50:00

use below javascript to check all the child node when you check parent node

XML

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
    $(function () {
        $("[id*=TreeViewForMasters] input[type=checkbox]").bind("click", function () {
            var table = $(this).closest("table");
            if (table.next().length > 0 && table.next()[0].tagName == "DIV") {
                //Is Parent CheckBox
                var childDiv = table.next();
                var isChecked = $(this).is(":checked");
                $("input[type=checkbox]", childDiv).each(function () {
                    if (isChecked) {
                        $(this).attr("checked", "checked");
                    } else {
                        $(this).removeAttr("checked");
                    }
                });
            } else {
                //Is Child CheckBox
                var parentDIV = $(this).closest("DIV");
                if ($("input[type=checkbox]", parentDIV).length == $("input[type=checkbox]:checked", parentDIV).length) {
                    $("input[type=checkbox]", parentDIV.prev()).attr("checked", "checked");
                }
                //else {
                //    $("input[type=checkbox]", parentDIV.prev()).removeAttr("checked");
                //}
            }
        });
    })

</script>

Er Atul Sharma · Answer 3 · 2015-01-21T00:32:00

Solution 4

SQL

TreeView.SelectedNode.Checked = true;
To check all the child-nodes you can do the following:

 foreach (TreeNode node in TreeView.SelectedNode.ChildNodes)
    node.Checked = true;

Posted 21-Jan-15 0:32am

Er Atul Sharma

Comments

Deepu S Nair 21-Jan-15 7:01am

Answering old questions adds nothing to the previous solution and is likely to attract
downvoting.