如何识别“计时器"的回调(“计时器在母版页中")内容页

问题描述

我的页面基于使用c#的asp.net中的主页和内容页面.
我在母版页中有一个计时器，如下所示:

my pages are base on master and content pages in asp.net with c#.
i have a timer in master page like below :

                    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                        <ContentTemplate>
                            <asp:Timer runat="server" ID="Timer1" Interval="10000" Enabled="False">
                            </asp:Timer>
                            <div id="SiteStatistics">
                                <asp:Label ID="lblDownload_Count_Title" runat="server" Text="Download Count :" ToolTip="Download Count :"
                                    CssClass="lblTitleInStatistics"></asp:Label>
                                <asp:Label ID="lblDownload_Count" runat="server" Text="<%# Download_Count() %>" CssClass="lblCountInStatistics"></asp:Label>
                                <br />
                                <asp:Label ID="lblDownload_Count_By_UserID_Title" runat="server" Text="Ur Download Count :"
                                    ToolTip="Your Download Count From The Begining Of Registration UpTo Now" CssClass="lblTitleInStatistics"></asp:Label>
                                <asp:Label ID="lblDownload_Count_By_UserID" runat="server" Text="<%# Download_Count_By_UserID() %>"
                                    CssClass="lblCountInStatistics"></asp:Label>
                                <br />
                                <asp:Label ID="lblDownload_Count_By_UserID_Today_Title" runat="server" Text="Ur Download Count-Today :"
                                    ToolTip="Your Download Count-Today" CssClass="lblTitleInStatistics"></asp:Label>
                                <asp:Label ID="lblDownload_Count_By_UserID_Today" runat="server" Text="<%# Download_Count_By_UserID_Today() %>"
                                    CssClass="lblCountInStatistics"></asp:Label>
                                <br />
                                <asp:Label ID="lblDownload_Size_By_UserID_Title" runat="server" Text="Ur Download Size :"
                                    ToolTip="Your Download Size From The Begining Of Registration UpTo Now" CssClass="lblTitleInStatistics"></asp:Label>
                                <asp:Label ID="lblDownload_Size_By_UserID" runat="server" Text="<%# Download_Size_By_UserID() %>"
                                    CssClass="lblCountInStatistics"></asp:Label>
                                <br />
                                <asp:Label ID="lblDownload_Size_By_UserID_Today_Title" runat="server" Text="Ur Download Size-Today :"
                                    ToolTip="Your Download Size-Today" CssClass="lblTitleInStatistics"></asp:Label>
                                <asp:Label ID="lblDownload_Size_By_UserID_Today" runat="server" Text="<%# Download_Size_By_UserID_Today() %>"
                                    CssClass="lblCountInStatistics"></asp:Label>
                                <br />
                                <asp:Label ID="lblDownload_Size_By_UserID_Today_Remain_Title" runat="server" Text="Ur Remain Download Size-Today :"
                                    ToolTip="Your Remain Download Size-Today" CssClass="lblTitleInStatistics"></asp:Label>
                                <asp:Label ID="lblDownload_Size_By_UserID_Today_Remain" runat="server" Text="<%# Download_Size_By_UserID_Today_Remain() %>"
                                    CssClass="lblCountInStatistics"></asp:Label>
                            </div>
                        </ContentTemplate>
                    </asp:UpdatePanel>

此计时器每10秒滴答一次，并导致回调->由于该计时器，每10秒触发内容页面的第一page_load和母版页的最后page_load触发！
如何识别母版和内容页中的 timer'callback ，并防止由于回调而一次又一次地运行代码?

this timer ticks every 10 seconds and causes callbacks -> first page_load of content page and last page_load of master page fire every 10 seconds because of that timer!
how can i recognize that timer'callback in both master and content pages and prevent running codes again and again because of callback?

预先感谢

推荐答案

您有几种选择:

1. 删除计时器.看来您实际上并不需要/不需要它.
2. 在Master和Page的Page_Load上，将代码封装在if(!IsPostBack){//code}
内
3. 在Page_Load上检查Request.Params["__EVENTTARGET"]，并查看其中是否包含Timer1

1. Remove the timer. It seems you don't actually want it/need it.
2. on Page_Load of both, Master and Page, enclose your code inside a if(!IsPostBack){//code}
3. On Page_Load check Request.Params["__EVENTTARGET"] and see if it contains Timer1

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