把GridView中的信息直接导出到Excel

// 通过按钮发起输出动作
protected   void  BT_ExportReport_Click( object  sender, EventArgs e)
     {
        System.Web.HttpContext.Current.Response.ClearContent();
        System.Web.HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=excel.xls");
        System.Web.HttpContext.Current.Response.ContentType = "application/excel";

        System.IO.StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);

        // 将服务器控件的内容输出到所提供的 System.Web.UI.HtmlTextWriter 对象中
        GridView1.RenderControl(htw);

        System.Web.HttpContext.Current.Response.Write(sw.ToString());
        System.Web.HttpContext.Current.Response.End();
    }

     public   override   void  VerifyRenderingInServerForm(Control control)
     {

    }

与此同时，要在页面端的<@Page>中加入 EnableEventValidation="false"