string html = "<table><tr><td>1</td><td>11</td></tr><tr><td>2</td><td>22</td></tr></table>";
Response.ContentType = "application/force-download";
Response.AddHeader("content-disposition",
"attachment; filename=" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls");
Response.Write("<html xmlns:x="urn:schemas-microsoft-com:office:excel">");
Response.Write("<head>");
Response.Write("<META http-equiv="Content-Type" content="text/html; charset=utf-8">");
string fileCss = Server.MapPath("~/css/daoChuCSS.css");
string cssText = string.Empty;
StreamReader sr = new StreamReader(fileCss);
var line = string.Empty;
while ((line = sr.ReadLine()) != null)
{
cssText += line;
}
sr.Close();
Response.Write("<style>" + cssText + "</style>");
Response.Write("<!--[if gte mso 9]><xml>");
Response.Write("<x:ExcelWorkbook>");
Response.Write("<x:ExcelWorksheets>");
Response.Write("<x:ExcelWorksheet>");
Response.Write("<x:Name>Report Data</x:Name>");
Response.Write("<x:WorksheetOptions>");
Response.Write("<x:Print>");
Response.Write("<x:ValidPrinterInfo/>");
Response.Write("</x:Print>");
Response.Write("</x:WorksheetOptions>");
Response.Write("</x:ExcelWorksheet>");
Response.Write("</x:ExcelWorksheets>");
Response.Write("</x:ExcelWorkbook>");
Response.Write("</xml>");
Response.Write("<![endif]--> ");
Response.Write(html);//HTML
Response.Flush();
Response.End();