导出问题！~

    protected void Button2_Click(object sender, EventArgs e)
    {
        Export("application/ms-excel", "ywsl.xls");
    }
    private void Export(string FileType, string FileName)
    {
        //导出GridView到Excel表的的按钮
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        string FileNames = DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
        Response.AddHeader("Content-Disposition", "attachment;filename=" + FileNames);
        Response.ContentType = "application/ms-excel";
        System.IO.StringWriter sw = new System.IO.StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        GridView1.RenderControl(htw);
        Response.Write(sw.ToString());
        Response.End();
    }
    public override void VerifyRenderingInServerForm(Control control)
    {

    }
这样的代码。点击导出按钮，看见一个导出窗口闪了一下，不知道啥意思了！代码以前就写过，可用，现在变成这样！ --------------------编程问答-------------------- http://topic.csdn.net/u/20110701/09/fa548ccf-ac0d-4573-bda8-e576bda9476f.html?30034

补充：.NET技术 ,  ASP.NET