下载GridView（保存为Excel文件）

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;
        }
    }