Asp.net 问题-更新面板中的任何隐藏字段都无法更新
我正在使用C#进行编程 我面临的问题是,我的隐藏变量值在更新面板中时并没有被更新。请参阅以下aspx代码:Asp.net 问题-更新面板中的任何隐藏字段都无法更新,asp.net,Asp.net,我正在使用C#进行编程 我面临的问题是,我的隐藏变量值在更新面板中时并没有被更新。请参阅以下aspx代码: <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager> <asp:Timer ID="Timer1" runat="server" Interval="10000" OnTick="Timer1_Tick"> </asp:T
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:Timer ID="Timer1" runat="server" Interval="10000" OnTick="Timer1_Tick">
</asp:Timer>
<input type="hidden" runat="server" id="hidCurrentDate" value="" />
<input type="hidden" runat="server" id="hidTripIds" value="" />
<input type="hidden" runat="server" id="hidTripDetails" value="" />
<asp:UpdateProgress ID="uprogTrips" runat="server">
<ProgressTemplate>
<span style="display: block; text-align: center">
<p style="font-family: Verdana; font-size: larger; font-weight: bold;">
<img src="../../Images/ajax-loader.gif" alt="Processing..." /><br />
<br />
Processing...</p>
</span>
</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="upTripsGrid" runat="server" UpdateMode="Always">
<ContentTemplate>
<asp:GridView ID="gvAllTrips" runat="server" OnRowDataBound="gvAllTrips_RowDataBound"
OnPageIndexChanging="gvAllTrips_PageIndexChanging" AllowPaging="true" AutoGenerateColumns="false">
<PagerSettings Mode="NumericFirstLast" PageButtonCount="35" Position="TopAndBottom" />
<PagerStyle CssClass="GridPager" />
</asp:GridView>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
<asp:AsyncPostBackTrigger ControlID="ddSortBy" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="ddFilterBy" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="cbPageOptions" EventName="CheckedChanged" />
</Triggers>
</asp:UpdatePanel>
处理
下面是我试图用CS代码更新其中一个隐藏字段的代码
有趣的是,当我试图调试它时,它显示了所有的值,但是当我在源代码页面上看到它时,它没有给出任何值
这是我的aspx.cs代码:
protected void Timer1_Tick(object sender, EventArgs e)
{
DataTable dtTrips = null;
WEX.Prototype.Data.TripDA tripDA = new WEX.Prototype.Data.TripDA();
string tID = hidTripIds.Value;
string[] tripIDs = new string[1000];
tripIDs = tID.Split(',');
foreach (string tripID in tripIDs)
{
TripSummaryBO tripSummaryBO = tripDA.getTripSummary(Convert.ToInt32(tripID));
if (tripSummaryBO.tripLastEditedOnDate > Convert.ToDateTime(hidCurrentDate.Value))
{
WEX.Prototype.Service.WSProxies WSProxies = new WEX.Prototype.Service.WSProxies();
dtTrips = WSProxies.Build();
Session["AllTrips"] = dtTrips;
dtTrips = (DataTable)Session["AllTrips"];
if (dtTrips != null)
{
if (cnt==0)
{
hidTripDetails.Value = ("Trip name-" + tripSummaryBO.tripName + " was modified by user " + tripSummaryBO.tripLastEditedBy);
}
else
{
hidTripDetails.Value = hidTripDetails.Value + " <br/> " + ("Trip name-" + tripSummaryBO.tripName + " was modified by user " + tripSummaryBO.tripLastEditedBy);
}
BuildGridViewControl(dtTrips);
cnt = cnt + 1;
}
}
else
{
//upTripsGrid.Triggers.Clear();
PageInit();
}
}
}
protectedvoid Timer1\u Tick(对象发送方,事件参数e)
{
数据表dtTrips=null;
WEX.Prototype.Data.TripDA TripDA=新的WEX.Prototype.Data.TripDA();
字符串tID=hidTripIds.Value;
字符串[]TripID=新字符串[1000];
tripIDs=tID.Split(',');
foreach(tripID中的字符串tripID)
{
TripSummaryBO TripSummaryBO=tripDA.getTripSummary(Convert.ToInt32(tripID));
if(tripSummaryBO.TripLastedEditonDate>Convert.ToDateTime(hidCurrentDate.Value))
{
WEX.Prototype.Service.WSProxies WSProxies=新的WEX.Prototype.Service.WSProxies();
dtTrips=WSProxies.Build();
会话[“所有行程”]=数据行程;
dtTrips=(数据表)会话[“所有TRIPS”];
if(dtTrips!=null)
{
如果(cnt==0)
{
hidTripDetails.Value=(“Trip名称-”+tripSummaryBO.tripName+”已由用户“+tripSummaryBO.TripLastedEdBy”修改);
}
其他的
{
hidTripDetails.Value=hidTripDetails.Value+“
”+(“行程名称-“+tripSummaryBO.tripName+”已由用户“+tripSummaryBO.TripLastedEdBy”修改);
}
BuildGridViewControl(dtTrips);
cnt=cnt+1;
}
}
其他的
{
//upTripsGrid.Triggers.Clear();
PageInit();
}
}
}
请建议
谢谢。您的隐藏输入字段不在更新面板控件内。任何到服务器的异步往返都只会导致
UpdatePanel
本身中的控件在UI上更新,因此即使后台代码运行并更新隐藏字段,在前端它们仍然保持不变,因为它们位于面板之外
尝试移动
标记中的隐藏字段:
<asp:UpdatePanel ID="upTripsGrid" runat="server" UpdateMode="Always">
<ContentTemplate>
<input type="hidden" runat="server" id="hidCurrentDate" value="" />
<input type="hidden" runat="server" id="hidTripIds" value="" />
<input type="hidden" runat="server" id="hidTripDetails" value="" />
....
</ContentTemplate>
</asp:UpdatePanel>
....
好东西。请注意,如果要动态添加hiddenField,则需要ContentTemplateContainer:updatePanel.ContentTemplateContainer.Controls.add(hiddenFieldX);稍后使用:panel.ContentTemplateContainer.Controls.OfType().First()查找它;