如何在ListView.ItemCommand事件中获取控件值？ [英] How to get controls values in ListView.ItemCommand event ?

问题描述

Hello All



我有以下ListView

Hello All

I have the following ListView

<asp:ListView ID="lvPausedJobs" runat="server" EnableViewState="false" onitemcommand="lvPausedJobs_ItemCommand">
        <LayoutTemplate>
            <table border="0" cellpadding="5" width="600">
                <tr style="background-color:#E5E5FE">
                    <th align="left"><asp:Literal ID="Literal9" runat="server" EnableViewState="false">Job ID</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal1" runat="server" EnableViewState="false">Name</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal2" runat="server" EnableViewState="false">Job Number</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal3" runat="server" EnableViewState="false">Task</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal4" runat="server" EnableViewState="false">Start Time</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal5" runat="server" EnableViewState="false">Pause Time</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal6" runat="server" EnableViewState="false">Resume Time</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal8" runat="server" EnableViewState="false">Resume</asp:Literal></th>
                </tr>
                <tr id="itemPlaceholder"  runat="server"></tr>
            </table>
        </LayoutTemplate>
        <ItemTemplate>
            <tr  runat="server">
                <td><asp:Label runat="server" ID="lblID"> <%# Eval("JobID") %> </asp:Label></td>
                <td><asp:Label runat="server" ID="lblName"> <%# Eval("CustomerName") %> </asp:Label></td>
                <td><asp:Label runat="server" ID="lblJob"> <%# Eval("JobNumber") %> </asp:Label></td>
                <td><asp:Label runat="server" ID="lblTask"> <%# Eval("Task") %> </asp:Label></td>
                <td><asp:Label runat="server" ID="lblStart"> <%# Eval("StartTime") %> </asp:Label></td>
                <td><asp:Label runat="server" ID="lblEnd"> <%# Eval("PauseTime") %> </asp:Label></td>
                <td><asp:Label runat="server" ID="lblDur"> <%# Eval("ResumeTime") %> </asp:Label></td>
                <td><asp:LinkButton ID="LinkButton1" runat="server" EnableViewState="false" CommandName="Resume" CausesValidation="false">Resume</asp:LinkButton></td>
            </tr>
        </ItemTemplate>
        <EmptyDataTemplate>
            <table border="0" cellpadding="5" width="600">
                <tr style="background-color:#E5E5FE" >
                    <th align="left"><asp:Literal ID="Literal9" runat="server" EnableViewState="false">Job ID</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal1" runat="server" EnableViewState="false">Name</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal2" runat="server" EnableViewState="false">Job Number</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal3" runat="server" EnableViewState="false">Task</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal4" runat="server" EnableViewState="false">Start Time</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal5" runat="server" EnableViewState="false">Pause Time</asp:Literal></th>
                    <th align="left"><asp:Literal ID="Literal6" runat="server" EnableViewState="false">Resume Time</asp:Literal></th>
                </tr>
                <tr style="background-color:#EFEFEF">
                    <td colspan="7"><asp:Label runat="server" ID="lblName"> No Items to show </asp:Label></td>
                </tr>
            </table>
        </EmptyDataTemplate>
    </asp:ListView>

Now as you can see the link button has a command name. Now what is the correct way to get the controls text values during the ItemCommand event ? I have tried a lot of things like ListViewDataItem

ListView.DataKeys

FindControl



And I get one of two things, NullReferenceException or an empty string.



Thanks folks!

Now as you can see the link button has a command name. Now what is the correct way to get the controls text values during the ItemCommand event ? I have tried a lot of things like ListViewDataItem
ListView.DataKeys
FindControl

And I get one of two things, NullReferenceException or an empty string.

Thanks folks!

推荐答案

First of all your Labels Text property should be declared...



Instead of...

First of all your Labels Text property should be declared...

Instead of...

<asp:Label runat="server" ID="lblID"> <%# Eval("JobID") %> </asp:Label>

Do like...

Do like...

<asp:Label runat="server" ID="lblID" Text='<%# Eval("JobID") %>'></asp:Label>

Then inside the ItemCommand Event, you can code like below to get the Control.

Then inside the ItemCommand Event, you can code like below to get the Control.

Label LabelEmail = (Label)e.Item.FindControl("lblID");

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