C#现成数据导出功能：日期命名Excel文件

   /// <summary>
    /// 导出
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btn_out_Click(object sender, EventArgs e)
    {

        string title = "日志记录" + "_" + DateTime.Today.ToShortDateString();
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        string filename = "attachment;filename=" + System.Web.HttpUtility.UrlEncode(title, System.Text.Encoding.UTF8) + ".xls";
        //string filename = "attachment;filename=" + title + ".xls";
        Response.AppendHeader("Content-Disposition", filename);
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        //Response.ContentType指定文件类型 可以为application/ms-excel、application/ms-word、application/ms-txt、application/ms-html 或其他浏览器可直接支持文档
        Response.ContentType = "application/ms-excel";
        Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=GB2312\">");

        this.EnableViewState = false;
        // 定义一个输入流
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();//将信息写入字符串的System.IO.TextWriter。将信息存储在System.Text.StringBuilder

        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);//将标记字符和文本写入到ASP.NET服务器控件输出流

        RpShow.RenderControl(oHtmlTextWriter);//将服务器控件的内容输出到所提供的System.Web.UI.HtmlTextWriter中

        //this 表示输出本页，也可以绑定datagrid,或其他支持obj.RenderControl()属性的控件
        Response.Write(oStringWriter.ToString());