asp.net下載Excel文件，c#源代碼：
protected void Page_Load(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.Charset = "utf-8";
//下面這行很重要， attachment 參數(shù)表示作為附件下載，您可以改成 online在線打開
//filename=FileFlow.xls 指定輸出文件的名稱，注意其擴展名和指定文件類型相符，可以為：.doc .xls .txt .htm
Response.AppendHeader("Content-Disposition", "attachment;filename=FileFlow.xls");
Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
//Response.ContentType指定文件類型 可以為application/ms-excel application/ms-word application/ms-txt application/ms-html 或其他瀏覽器可直接支持文檔
Response.ContentType = "application/ms-excel";
this.EnableViewState = false;
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.RenderControl(oHtmlTextWriter);
//this 表示輸出本頁，你也可以綁定datagrid,或其他支持obj.RenderControl()屬性的控件
Response.Write(oStringWriter.ToString());
Response.End();
}
