private void RenderExcel(System.Web.UI.Control c)
{
// 确保有一个合法的输出文件名
if (_fileName == null || _fileName == string.Empty || !(_fileName.ToLower().EndsWith(".xls")))
{
_fileName = GetRandomFileName();
}
HttpResponse response = HttpContext.Current.Response;
response.Charset = "GB2312";
response.ContentEncoding = Encoding.GetEncoding("GB2312");
response.ContentType = "application/ms-excel/msword";
response.AppendHeader("Content-Disposition", "attachment;filename=" +
HttpUtility.UrlEncode(_fileName));
CultureInfo cult = new CultureInfo("zh-CN", true);
StringWriter sw = new StringWriter(cult);
HtmlTextWriter writer = new HtmlTextWriter(sw);
writer.WriteLine("<meta http-equiv=\"Content-Type\" content=\"text/html;charset=GB2312\">");
DataGrid dg = c as DataGrid;
if (dg != null)
{
dg.RenderControl(writer);
}
else
{
throw new ArgumentException("only supports DataGrid or ASPxGrid.", "c");
}
c.Dispose();
response.Write(sw.ToString());
response.End();
}