Crystal Report Export and Print button not working inside UpdatePanel （水晶报表放入UpdatePanel后不能打印导出）

 找到方法：

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
          
            <CR:CrystalReportViewer ID="CrystalReportViewer1" runat="server"
                DisplayGroupTree="False" oninit="CrystalReportViewer1_Init" />
                 </ContentTemplate>
                 <Triggers> <asp:PostBackTrigger ControlID="CrystalReportViewer1"/></Triggers>
            </asp:UpdatePanel>

来自：http://forums.asp.net/t/1045910.aspx