protected void btnDaoChu_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.AddHeader("content-disposition","attachment;filename=FileName.xls");
        Response.Charset = "gb2312";
        Response.ContentType = "application/vnd.xls";
        StringWriter stringWrite = new StringWriter();
        HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
        //GridView1.AllowPaging = false;
        //GridViewBind();
        GridView1.RenderControl(htmlWrite);
        Response.Write(stringWrite.ToString());
        Response.End();
        //GridView1.AllowPaging = true;
        //GridViewBind();
    }
    public override void VerifyRenderingInServerForm(Control control)
    {

    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Cells[1].Attributes.Add("style", "vnd.ms-excel.numberformat:@;");
        }
    }
请问我的代码哪里出错了，怎么运行怎么报了“一个只能在执行Render()的过程中调用......”我不知道哪里出错了
 请路过的朋友来看下了。
谢谢啊！！！