Telerik Kendo UI Grid: Allow grouping of any one column at a time

Question

Question is specific to MVC grid control. How to restrict grouping of two or more columns in Kendo Grid? User should be able to drag and group any column but not more than one column.

Answer 1

Bind this function to dataBound grid event:

function onDataBound(e) {
    var gr = e.sender.dataSource.group();
    if(gr.length > 1){
        gr.shift();
        e.sender.dataSource.fetch();
    }
}

Greetings.