Add new item event in RadListControl

[tran]

Hi Telerik Team! I have a question about RadListControl. I have a RadListControl, which event will I catch up the event when a new RadListDataItem insert into my RadListControl ?

Thanks
Tran Dat

[Richard Slade]

Hello,

There are two ways for this. If you are binding to a datasource then you can use

AddHandler Me.RadListControl1.ItemDataBound, AddressOf RadListControl_ItemDataBound

    Private Sub RadListControl_ItemDataBound(ByVal sender As Object, ByVal e As ListItemDataBoundEventArgs)
        MessageBox.Show(e.NewItem.Text)
    End Sub

or, when adding items, you can subscribe to the ItemsChanged event

AddHandler Me.RadListControl1.ListElement.ItemsChanged, AddressOf RadListControl_ItemsChanged

    Private Sub RadListControl_ItemsChanged(ByVal sender As Object, ByVal e As Telerik.WinControls.Data.NotifyCollectionChangedEventArgs)
        MessageBox.Show(CType(e.NewItems(0), RadListDataItem).Text)
    End Sub

Hope that helps
Richard

[Eric]

Hi!

I just have a tiny question for this:
Do I have to add the handler manually at the code for the RadListControl_ItemsChanged Event?
The ItemDataBound I can find at the NavigationBar, but not the ItemsChanged (Maybe because it's from the ListElement Property)

Is that right?
Thanks in advance,
Eric

[Eric]

Also, this event, the ItemsChanged, has being triggered unstoppable until I get a stack overflow. Is this the right event to catch the add of an ListItem in the list? (In this particular case I'm not working with a Data Binding).

Thanks,
Eric

[Stefan]

Hello Tran,

Thank you for writing.

Indeed the event belongs to the ListElement and you have to manually subscribe to it. 

Yes, this is the right event to capture changes in an item. The event arguments allow you to check what is the action that triggered the event.

I hope this information addresses your question. If there is anything else I can assist you with, do not hesitate to contact me.

Regards,
Stefan
the Telerik team