在ASP.NET中GridView导出Excel的快速方法

 此方法最有效，所以贴出来与大家分享

        protected void btnOutExcel_Click(object sender, EventArgs e)
        {
            if (GridView1.Rows.Count > 0)
            {
                //调用导出方法
                ExportGridViewForUTF8(GridView1, DateTime.Now.ToShortDateString() + ".xls");
            }
            else
            {
                obo.Common.MessageBox.Show(this, "没有数据可导出，请先查询数据!");
            }
        }

        /// 

        /// 重载，否则出现“类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标... ”的错误
        /// 
        /// 
        public override void VerifyRenderingInServerForm(Control control)
        {
            //base.VerifyRenderingInServerForm(control);
        }

        /// 

        /// 导出方法
        /// 
        /// 
        /// 保存的文件名称
        private void ExportGridViewForUTF8(GridView GridView, string filename)
        {

            string attachment = "attachment; filename=" + filename;

            Response.ClearContent();
            Response.Buffer = true;
            Response.AddHeader("content-disposition", attachment);

            Response.Charset = "UTF-8";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
            Response.ContentType = "application/ms-excel";
            System.IO.StringWriter sw = new System.IO.StringWriter();

            HtmlTextWriter htw = new HtmlTextWriter(sw);
            GridView.RenderControl(htw);

            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();

        }

若出现“只能在执行 Render() 的过程中调用 RegisterForEventValidation”的错误提示。
有两种方法可以解决以上问题：
1.修改web.config(不推荐)
2.直接在导出Execl的页面修改
<%@ Page Language="C#" EnableEventValidation = "false" AutoEventWireup="true" CodeFile="ExportGridView.aspx.cs" Inherits="ExportGridView" %>