protected void btnXoa_Click(object sender, EventArgs e) { //String content = "<html><body><table><tr><td>your table</td></tr></table></body></html>"; //Response.Clear(); //Response.AddHeader("Content-Disposition", "attachment;filename=C:\abc.xls"); //Response.ContentType = "application/vnd.xls"; //Response.Cache.SetCacheability(HttpCacheability.NoCache); // not necessarily required //Response.Charset = ""; //Response.Output.Write(content); //Response.End(); if (GridUser.FocusedRowIndex > -1) { DM_USER sysUser = (DM_USER)GridUser.GetRow(GridUser.FocusedRowIndex); DM_USERService isysUser = new DM_USERService(); isysUser.DeleteDM_USER(sysUser); GridUser_CustomCallback(null, null); } }