ASP.NET DataGrid 导出EXCEL 中文变乱码

   新增一行

Response.Write("<meta http-equiv=Content-Type content="text/html; charset=UTF-8">");

        Response.Clear();
        Response.Buffer = false;
        Response.Charset = "UTF-8";
        Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
        //Response.Charset = "";
        Response.ContentType = "application/vnd.ms-excel";
        Response.Write("<meta http-equiv=Content-Type content="text/html; charset=UTF-8">");