ASP.NET Get the Selected List item data from ListView

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I have ASP.NET Listview which is populated by a Datatable.

VB

<asp:ListView ID="lvCustomers" runat="server" GroupPlaceholderID="groupPlaceHolder1"
                                                    ItemPlaceholderID="itemPlaceHolder1" OnPagePropertiesChanging="lvCustomers_PagePropertiesChanging" ClientIDMode="AutoID">

In the page's body I have printed out the values from the table:

XML

<asp:Label ID="idlbl" runat="server" Visible="false" Text='<%# Eval("id") %>'></asp:Label>
<h4 class="timeline-title"><%# Eval("ActivityContent") %></h4>

In the code behind, I need to get the value of label 'idlbl' as a String through a button click event. How do I do this?

Posted 13-Mar-15 1:04am

Dinuka Jayasuriya

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2015-03-13T01:28:00

Solution 1

Quote:
In the code behind, I need to get the value of label 'idlbl' as a String through a button click event. How do I do this?

If the Button is outside of ListView, then you need to loop through the Items of ListView and fetch inside the loop.

If the Button is inside, then you can use ListView.ItemCommand Event[^] and find the current item and its properties.

Posted 13-Mar-15 1:28am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Dinuka Jayasuriya 13-Mar-15 7:29am

It is inside

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Mar-15 7:30am

Then use ItemCommand Event.

Dinuka Jayasuriya 13-Mar-15 7:44am

When does the ItemCommand get triggered? I've added a break pointed to the ItemCommand method but it doesnt get visited?

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Mar-15 7:58am

Steps
-----

1. Declare the event in markup.


<asp:ListView runat="server" 
        ID="lvCustomers"
        OnItemCommand="lvCustomers_OnItemCommand"
......
......

2. Add the Button like this...


<asp:LinkButton runat="server" 
                ID="someButtonId" 
                Text="Some Text" 
                CommandName="SomeCommandName" />

3. Inside the Event do like below...

protected void lvCustomers_OnItemCommand(object sender, ListViewCommandEventArgs e)
{
    Label idlbl = (Label)e.Item.FindControl("idlbl");
}

Dinuka Jayasuriya 13-Mar-15 8:14am

Thank you but it doesnt make sense, What does the button do in your case? Does it get the value from the label? Why is the button not mapped to any of the events?

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Mar-15 8:22am

As you said you have a Button, just use that. I added this just to give the demo. just use your button which is inside the ListView with a CommandName.

Dinuka Jayasuriya 13-Mar-15 8:48am

The string returns a null. I added this to the lvCustomers_ItemCommand:

Label idlbl = (Label)e.Item.FindControl("idlbl");
idd = idlbl.Text; //idd is a global variable which is read by another button click

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Mar-15 9:34am

The Label is visible false. Then why are you using that? You can use a HiddenField or simply if it is the identity field from the datasource, then just add it as a DataKey for the ListView.