i followed this link (http://www.telerik.com/help/reporting/mvc-report-viewer-extension-embedding.html) to integrated the telerik reporting Q2 2014 in my mvc application. In my homecontroller index view to design the html telerik reportviewer. I create a blank report and set the report to reportviewer reportsource. In the report i get the result to use web api service and bind the collection of result to datasource in the NeedDataSource event, the event also fire and the datasource also accept the values but the problem is the result is not showing in my report viewer yet