<form id="Form1" runat="server">    <asp:ScriptManager ID="ScriptManager1" runat="server">    </asp:ScriptManager>    <div>        <asp:Label ID="Label1" runat="server" Text="车牌号："></asp:Label>        <asp:TextBox ID="tbVehicleLic" runat="server"></asp:TextBox>        <asp:Label ID="Label2" runat="server" Text="离线间隔(分钟)："></asp:Label>        <asp:TextBox ID="tbTimeSpan" runat="server">30</asp:TextBox>        <asp:Button ID="btnSearch" runat="server" onclick="btnSearch_Click" Text="查询" Width="80px" />    </div>    <div>            <asp:UpdatePanel ID="UpdatePanel1" runat="server">            <ContentTemplate>
　　　　　　　　　　<!--下面是一个报表-->                <rsweb:ReportViewer ID="ReportViewer1" runat="server" Font-Names="Verdana"                     Font-Size="8pt" InteractiveDeviceInfos="(集合)" WaitMessageFont-Names="Verdana"                     WaitMessageFont-Size="14pt" Width="100%" Height="70%">                    <LocalReport ReportPath="bin\Pages\Report\LastOnlineRpt.rdlc">                    </LocalReport>                </rsweb:ReportViewer>            </ContentTemplate>        </asp:UpdatePanel>        </div>      </form>

 protected void Page_Load(object sender, EventArgs e)        {            ScriptManager1.RegisterAsyncPostBackControl(btnSearch);//给按钮注册异步事件        }        protected void btnSearch_Click(object sender, EventArgs e)        {            string vehicleLic = this.tbVehicleLic.Text;            double timeSpan = Convert.ToDouble(this.tbTimeSpan.Text);            string lineID = "164,165,166,167";            MainBLL bll = new MainBLL();            var dt = bll.GetBusStatusByLineID(lineID, vehicleLic, timeSpan);            ReportDataSource ReportData = new ReportDataSource("DataSet1", dt);            ReportViewer1.LocalReport.DataSources.Clear();            ReportViewer1.LocalReport.DataSources.Add(ReportData);            //this.UpdatePanel1.Update();        }