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<input type="button" id="btnToExcel" value="导出到 Excel" onclick="ExportDataToExcel()" />
public static void DataTableToExcel(System.Data.DataTable dt)
{
HttpResponse response = HttpContext.Current.Response;
string fileName = "MyReportDatas.xls";
response.ClearContent();
response.AddHeader("content-disposition", "attachment;filename=" + fileName);
response.ContentType = "application/excel";
response.ContentEncoding = System.Text.Encoding.UTF8;
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
System.Web.UI.WebControls.GridView gvExport = new System.Web.UI.WebControls.GridView();
gvExport.HeaderStyle.Font.Bold = true;
gvExport.DataSource = dt;
gvExport.DataBind();
gvExport.RenderControl(htw);
response.Write("<meta http-equiv=Content-Type content='text/html; charset=utf-8'>");
response.Write(Environment.NewLine);
response.Write(sw.ToString());
response.End();
}