FormView不显示问题 （asp.net）

Question

放于FormView控件Itemtemplate中的控件在页面运行时,显示不出来,是怎么回事呢?

Answer 1

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="pianx.aspx.cs" Inherits="ModuleImages_pianx" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="SampleContent" Runat="Server">
    <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetProduct"
        TypeName="MeterParam">
        <SelectParameters>
            <asp:QueryStringParameter Name="ModuleAddr" QueryStringField="ModuleAddr" Type="int32" />
        </SelectParameters>
    </asp:ObjectDataSource>
    <asp:UpdatePanel id="UpdatePanel1" runat="server" UpdateMode="Conditional">
        <contenttemplate>
    <asp:Timer id="Timer1" runat="server" OnTick="Timer1_Tick" Interval="3000"></asp:Timer> 
    
    <asp:FormView id="FormView1" runat="server" DataSourceID="ObjectDataSource1">
        <ItemTemplate>
            表 号：<asp:Label id="ModuleAddr" runat="server" Text='<%# Eval("ModuleAddr") %>'></asp:Label><BR />报警延时：<asp:Label id="RelayTime" runat="server" Text='<%# Eval("RelayTime") %>' ></asp:Label><BR /><!--      存储时间：<asp:Label ID="StoreTime" runat="server" Text='<%# Eval("StoreTime") %>'></asp:Label><br />-->
        </ItemTemplate>
    </asp:FormView> <asp:FormView id="FormView2" runat="server" DataSourceID="ObjectDataSource1" BorderStyle="Groove"><ItemTemplate>
                    <div >A通道</div>
                    当前值：<asp:Label ID="ValueA" runat="server" Text='<%# Eval("ValueA","{0:f}") %>'></asp:Label><br />
                    正报警值：<asp:Label ID="AlertA1" runat="server" Text='<%# Eval("AlertA1") %>'></asp:Label><br />
                    正停机值：<asp:Label ID="AlertA2" runat="server" Text='<%# Eval("AlertA2") %>'></asp:Label><br />
                    负报警值：<asp:Label ID="AlertA3" runat="server" Text='<%# Eval("AlertA3") %>'></asp:Label><br />
                    负停机值：<asp:Label ID="AlertA4" runat="server" Text='<%# Eval("AlertA4") %>'></asp:Label><br />
                    正报警：<asp:Label ID="StatA3" runat="server" Text='<%# Eval("StatA3") %>'></asp:Label><br />
                    正停机：<asp:Label ID="StatA4" runat="server" Text='<%# Eval("StatA4") %>'></asp:Label><br />
                    负报警：<asp:Label ID="StatA1" runat="server" Text='<%# Eval("StatA1") %>'></asp:Label><br />
                    负停机：<asp:Label ID="StatA2" runat="server" Text='<%# Eval("StatA2") %>'></asp:Label><br />
                    最大值：<asp:Label ID="MaxA" runat="server" Text='<%# Eval("MaxA","{0:f}") %>'></asp:Label><br />
                    最小值：<asp:Label ID="MinA" runat="server" Text='<%# Bind("MinA","{0:f}") %>'></asp:Label><br />
                    量 程：<asp:Label ID="MeasureA4" runat="server" Text='<%# Bind("MeasureA4") %>'></asp:Label>~
                    <asp:Label ID="MeasureA20" runat="server" Text='<%# Bind("MeasureA20") %>'></asp:Label><br />
                
</ItemTemplate>
</asp:FormView> <asp:FormView id="FormView3" runat="server" DataSourceID="ObjectDataSource1" BorderStyle="Groove"><ItemTemplate>
                    <div >
                        B通道</div>
                    当前值：
                    <asp:Label ID="ValueB" runat="server" Text='<%# Eval("ValueB","{0:f}") %>'></asp:Label><br />
                    正报警值：<asp:Label ID="AlertB1" runat="server" Text='<%# Eval("AlertB1") %>'></asp:Label><br />
                    正停机值：<asp:Label ID="AlertB2" runat="server" Text='<%# Eval("AlertB2") %>'></asp:Label><br />
                    负报警值：<asp:Label ID="AlertB3" runat="server" Text='<%# Eval("AlertB3") %>'></asp:Label><br />
                    负停机值：<asp:Label ID="AlertB4" runat="server" Text='<%# Eval("AlertB4") %>'></asp:Label><br />
                    正报警：<asp:Label ID="StatB3" runat="server" Text='<%# Eval("StatB3") %>'></asp:Label><br />
                    正停机：<asp:Label ID="StatB4" runat="server" Text='<%# Eval("StatB4") %>'></asp:Label><br />
                    负报警：<asp:Label ID="StatB1" runat="server" Text='<%# Eval("StatB1") %>'></asp:Label><br />
                    负停机：<asp:Label ID="StatB2" runat="server" Text='<%# Eval("StatB2") %>'></asp:Label><br />
                    最大值：<asp:Label ID="MaxB" runat="server" Text='<%# Eval("MaxB","{0:f}") %>'></asp:Label><br />
                    最小值：<asp:Label ID="MinB" runat="server" Text='<%# Eval("MinB","{0:f}") %>'></asp:Label><br />
                    量 程：<asp:Label ID="MeasureB4" runat="server" Text='<%# Bind("MeasureB4") %>'></asp:Label>~
                    <asp:Label ID="MeasureB20" runat="server" Text='<%# Bind("MeasureB20") %>'></asp:Label><br />
                
</ItemTemplate>
</asp:FormView> 
</contenttemplate>
        <triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick"></asp:AsyncPostBackTrigger>
</triggers>
    </asp:UpdatePanel>
</asp:Content>

Answer 2

类似pianx.aspx?ModuleAddr=1是FormView1啥都不显示？

Answer 3

是的。
Label stata1 = (Label)FormView2.FindControl("StatA1");
结果stata1 = null;

Answer 4

确信MeterParam.GetProduct()返回记录？

Answer 5

对了，Timer1_Tick()方法做什么？

Answer 6

aspx代码基本不可能有问题,只剩----确信MeterParam.GetProduct()返回记录？

Answer 7

问题解决了:就是您说的Meterparam.GetProduct()没有返回数据。多谢兄台！明天加分