aspx页面前台：（使用用户控件）
<uc1:DownExcel ID="DownExcel1" runat="server" />
aspx页面后台：
protected void Page_Load(object sender, EventArgs e)
{
DownExcel1.myEvent += new EventHandler(BindGV);
DownExcel1.sFileName = "门店扫码明细表";
DownExcel1.GridViewName = "GVExcel";
}
用户控件前台：
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<script type="text/javascript" language="javascript">
function showM() {
$find("popu").show();
}
</script>
<asp:Button ID="Button1" runat="server" Text="下载" Width="80px" BackColor="#0066FF"
Font-Bold="True" ForeColor="White" OnClick="Button1_Click" OnClientClick="showM()"/>
<cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server" TargetControlID="Button3"
BehaviorID="popu" PopupControlID="panModalPopup" BackgroundCssClass="cssModalBackground"
DropShadow="true" CancelControlID="Image3">
</cc1:ModalPopupExtender>
<asp:Panel ID="panModalPopup" runat="server" Style="display: none">
<asp:Image ID="Image3" runat="server" ImageUrl="~/Content/Images/Loading1.gif" />
</asp:Panel>
用户控件后台：
添加引用： using System.Web.UI.WebControls;
using System.IO;
public event EventHandler myEvent;
public string sFileName;
public string GridViewName;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
GridView gv = (GridView)Parent.FindControl(GridViewName);
Response.Clear();
string fileName = sFileName;
Response.AddHeader("content-disposition", "attachment;filename=" + Server.UrlEncode(fileName + ".xls"));
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.Write("<meta http-equiv=Content-Type content=text/html;charset=gb2312>");
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
if (myEvent != null)
myEvent(this, EventArgs.Empty);
gv.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();
}
catch (Exception ex)
{
throw ex;
}
}
原文地址：https://www.cnblogs.com/suflowers1700218/p/9101296.html