Export to Excel not working in mvc

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MVC

MS-Excel

controller

export

i have a method in controller which should generate excel.my code in controller is as:

public ActionResult ExportData()
{
string[] abc = { "AAA", "BBB", "CCC" };
            GridView gv = new GridView();
            gv.DataSource = abc;
            gv.DataBind();
            Response.ClearContent();
            Response.Buffer = true;
            Response.AddHeader("content-disposition", "attachment; filename=Marklist.xls");
            Response.ContentType = "application/ms-excel";
            Response.Charset = "";
            StringWriter sw = new StringWriter();
            HtmlTextWriter htw = new HtmlTextWriter(sw);
            gv.RenderControl(htw);
            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();
            return RedirectToAction("_EligibilityCriteria");    
}

i googled and found this is the only code.this code is working in .net application but not in mvc.kindly reply what i am doing wrong in code.