前端：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false" %>
<asp:GridView ID="gv_Score" runat="server" CellPadding="4" ForeColor="#333333" AllowPaging="false">
再定义一个按钮，实现导出功能。
后台CS：
using System.IO;
protected void btn_Export_Click(object sender, EventArgs e)
{
Response.Charset="GB2312";
Response.ContentEncoding=System.Text.Encoding.UTF8;
Response.AddHeader("Content-Disposition","attachment;FileName="+HttpUtility.UrlEncode(DateTime.Now.ToString(),System.Text.Encoding.UTF8)+".xls");
Response.ContentType = "application/ms-excel"; //输出文件类型为excel类型
this.EnableViewState = false;
StringWriter wt = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(wt);
gv_Score.RenderControl(hw);
Response.Write(wt.ToString());
Response.End();
}
//必须覆写些方法，不然会报错。
public override void VerifyRenderingInServerForm(Control control)
{
}