Asp.NET导出Excel文件乱码解决方法

HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.Buffer = true;
        HttpContext.Current.Response.Charset = "GB2312";
        this.Page.Response.Write("<meta http-equiv=Content-Type content=\"text/html;charset=GB2312\">");//解决乱码问题
        HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("日常保养记录" + ".xls"));
        HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        HttpContext.Current.Response.ContentType = "application/ms-excel";

       HttpContext.Current.Response.Write(this.outputstr.Value);//写入excel
        HttpContext.Current.Response.End();