fastest way to get the checked nodes of a given node client side

[mirang]

Is there any way to get the count of checked nodes under a given node. The reason is because, i dont want to loop through all nodes and get the checked nodes on the client side. My entire operations are based on the client 
        I was just wondering if i can use the json string in _clientState.checkedNodes to find the count? 

[Bozhidar]

Hello Mirang,

Yes, this is possible. Every node has a hierarchical index, which shows which are its parent nodes. These indexes are also stored in the _checkedIndexes property of the treeview, so you can easily use them to determine if a checked node is a child of another node.

Here's what your function should look like:

function getCheckedCountUnderNode(node) {
    var index = node._getHierarchicalIndex();
    var tree = node.get_treeView();
    var checkedIndexes = tree._checkedIndexes;
    var count = 0;

    for (var i = 0; i < checkedIndexes.length; i++) {
        if (checkedIndexes[i].startsWith(index)) {
            count++;
        }
    }
}

Kind regards,
Bozhidar
the Telerik team

[mirang]

Thanks for your reply. I was also thinking of using the _checkedNodesJson to find the string to determine the checked nodes of a given node. Anyways, that solution looks quite faster, will try to implement the same.
Thanks again.