Gridview导出成Excel

在aspx里面加上

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AAAAAAA.aspx.cs" Inherits="AAAAAA" EnableEventValidation="false" %>

重载一个方法

    public override void VerifyRenderingInServerForm(Control control)
    {
        //这个必不可少
    }

//先隐藏一些列

        GridView_AdvancePaymentChange.AllowPaging = false;
        bindData();
        GridView_AdvancePaymentChange.Columns[0].Visible = false;
        DateTime dt = System.DateTime.Now;
        string str = dt.ToString("yyyyMMddhhmmss");
        str = "预付款调整表" + str + ".xls";
        Response.ClearContent();
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(str, Encoding.UTF8).ToString());
        Response.ContentType = "application/excel";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        GridView_AdvancePaymentChange.RenderControl(htw);
        Response.Write(sw.ToString());
        Response.End();
        GridView_AdvancePaymentChange.AllowPaging = true;