Treeview checkbox - check/uncheck parent nodes if child is checked

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Hi,

I'm using a Treeview with ShowCheckBoxes="All" , so basically I have a tree with all CheckBox Nodes. I'm using the TreeView populate the Tree code behind dynamically.

My requrements are the following:

1) If Select Any Child Node then checked all parent nodes. like lower to upper checked

ex :- Treeview Exmp-
         >>  India 
                   >>New Delhi
                   >>Chandigarh
                   >>Bangalore
                   >>KolKata

if i select Bangalore after automatically checked Chandigarg, New Delhi And parent node India. Jquery,JavaScript,Server Side anything used

Can anyone help me..
Thanks in advance...

What I have tried:

JavaScript

$(document).ready(function () {

            $("#&lt;%= TreeView1.ClientID %>").find("input").click(function () {

                

                    var parentChk = $("#" + $(this).parents(":eq(4)").attr("id").replace('Nodes', 'CheckBox'));
                    debugger;
                    var allChecked = true;
                    var allUnchecked = true;

                    $(this).parents(":eq(4)").find("input").each(function () {

                        if ($(this).attr("checked")) {

                            allUnchecked = false;
                        }
                        else {
                            allChecked = false;
                            parentChk.attr("checked", true);
                        }
                    });

                    if (allChecked) {
                        parentChk.attr("checked", true);
                    }
                    else if (allUnchecked) {
                        parentChk.attr("checked", false);
                    }
            });
        });

Posted 2-Jan-18 20:10pm

abhinandan506

Updated 3-Jan-18 20:56pm

Maciej Los

v2

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Altaf Ansari · Answer 1 · 2018-01-03T17:55:00

Try this its working fine..

On TreeView After_Check Event :

C#

private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)    
    {    
       if (e.Node.Checked)    
           CheckAllChildNodes(e.Node, true);    
        else    
          CheckAllChildNodes(e.Node, false);    
    }

Check or Uncheck Nodes Function :

C#

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);  
            }  
        }  
    }