asp.net将table写入excel

/// <summary>
    /// 导出Excel
    /// </summary>
    /// <param name="col"> Grid</param>
    /// <param name="title">导出标题</param>
    /// <param name="filename">导出名称</param>
    /// <returns></returns>
    public static bool ToExcel(GridView gv ,string fname)
    {
        try
        {
            string filename = HttpUtility.UrlEncode(fname + ".xls", System.Text.Encoding.UTF8);

            System.Web.HttpContext.Current.Response.Clear();
            System.Web.HttpContext.Current.Response.Charset = "GB2312";
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename = " + filename);
            System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
            System.Web.HttpContext.Current.Response.ContentType = "application/ms-excel";
            gv.Page.EnableViewState = false;
            System.IO.StringWriter sw = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter hw = new HtmlTextWriter(sw);
            gv.RenderControl(hw);
            System.Web.HttpContext.Current.Response.Write(fname);//这里添加一行设置标题
            System.Web.HttpContext.Current.Response.Write("<br>制表日期：" + DateTime.Now.ToShortDateString());//这里添加一行设置标题
            System.Web.HttpContext.Current.Response.Write(sw.ToString());
            System.Web.HttpContext.Current.Response.End();
        }
        catch (System.Exception ex)
        {
            Console.Write(ex.Message);
            return false;
        }
        return true;
    }

补充：如果需要导出gridview所有数据及不分页；则在使用此方法前，需要设置
gridview1.allowpaging = false;
gridview1.databind();