gridview导出到Excel表格问题

Question

我想把gridview的数据导进EXCEL中
代码是
  protected void Button2_Click(object sender, EventArgs e)
    {
        Export("application/ms-excel", "报表.xls");//输出Excel
    }    #region 输出报表
    private void Export(string Filetype, string FileName)
    {
        Response.Clear();        Response.Buffer = true;        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName)); //定义输出文件和文件名 
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文 
        Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 
        this.EnableViewState = true;
        System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
        this.GridView1.RenderControl(oHtmlTextWriter);
        Response.Write(oStringWriter.ToString());
        Response.End();
    }
    #endregion导到桌面以后打开，全是乱码 请问为什么啊

Answer 1

参考：
http://www.cnblogs.com/insus/articles/1400266.html