Asp.net GridView 导出Excel （不会整个页面导出且不会乱码）

搞了快一个小时网上的代码缺这缺那的，这个我自己改好的，希望能帮到大家，前台就是拉个gridvidw，贴后台代码给大家看看 

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.GridView1.DataSource = ds.VFoodReport.ToList();
            this.GridView1.DataBind();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", "attachment;filename=Report.xls");
        // 如果设置为 GetEncoding("GB2312");导出的文件将会出现乱码！！！
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
        this.GridView1.RenderControl(oHtmlTextWriter);
        Response.Output.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:@;");
        }
    }

 我这里测试通过没有问题了  有什么问题大伙再继续讨论