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ajaxRequest window client method documentation states that "data" will be sent to URL as "POST" instead it is being sent as "GET".
http://www.telerik.com/help/aspnet-mvc/telerik-ui-components-window-client-api-and-events.html#ajaxRequest
The problem appears to be in telerik.window.min.js script file.
should be
http://www.telerik.com/help/aspnet-mvc/telerik-ui-components-window-client-api-and-events.html#ajaxRequest
The problem appears to be in telerik.window.min.js script file.
a.ajax({type:"GET",url:....)should be
a.ajax({type:"POST",url:....)