导出Excel出错

[zzc_king]

我用Girdview绑定的数据，要导出Excel 报
只能在执行 Render() 的过程中调用 RegisterForEventValidation；

   protected void btnElx_Click(object sender, EventArgs e)
        {

            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "utf-8";
            Response.AppendHeader("Content-Disposition", "attachment;filename=ASMCRPT.xls");
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
            Response.ContentType = "application/ms-excel";
            //this.EnableViewState = false;
            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            this.GvContract.RenderControl(oHtmlTextWriter);
            Response.Write(oStringWriter.ToString());
            Response.End(); 

            
        }
        public override void VerifyRenderingInServerForm(Control control)
        {
        }

[syb1045]

什么错误。。

[zzc_king]

错误：：：只能在执行 Render() 的过程中调用 RegisterForEventValidation；

[子夜__]

导出Execl的页面加上
<%@ Page Language="C#" EnableEventValidation = "false" AutoEventWireup="true"......