Mensaje al abrir creado desde c#

[diegolo]

HOOLA YO HAGO ESTO EN C# 2003 OJALA TE SIRVA

Response.Clear();
Response.AddHeader("content-disposition", "attachment;filename=NombreArchivo.xls");
Response.Charset = "";
Response.Cache.SetCacheability(HttpCacheability.No Cache);
Response.ContentType = "application/vnd.xls";
//para que no salgan esos malditos signos
Response.ContentEncoding = System.Text.Encoding.UTF7;
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
this.Datagrid1.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();

PRUEBALO Y ME DICES
SUERTE!!!!!