asp.netGridView导出到Excel代码

StringBuildersb=newStringBuilder();
StringWritersw=newStringWriter(sb);
HtmlTextWriterhtw=newHtmlTextWriter(sw);
Pagepage=newPage();
HtmlFormform=newHtmlForm();
GVLinkman.EnableViewState=false;
page.EnableEventValidation=false;
page.DesignerInitialize();
page.Controls.Add(form);
form.Controls.Add(GVLinkman);
page.RenderControl(htw);
Response.Clear();
Response.Buffer=true;
Response.ContentType="application/vnd.ms-excel";
Response.AddHeader("Content-Disposition","attachment;filename=data.xls");
Response.Charset="UTF-8";
Response.ContentEncoding=Encoding.Default;
Response.Write(sb.ToString());
Response.End();