绝对可行的GridView中数据导出到Excle

protected void Button1_Click(object sender, EventArgs e)
      {

        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "utf-8";
        Response.AppendHeader("Content-Disposition", "attachment;filename=FileFlow.xls");
        //设置为GetEncoding("gc2312")导出的文件会出现乱码
        Response.ContentEncoding = System.Text.Encoding.UTF7;
        Response.ContentType = "application/ms-excel";//设置输出文件类型为excle      
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
        this.GridView1.RenderControl(oHtmlTextWriter);    
        Response.Write(oStringWriter.ToString());
        Response.Flush();
        Response.End();　
    }
    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:@;");
        }
    }