Handling events of usercontrols within listview

Question

I have a simple usercontrol which raises an event on button click

Public Class UcPaymentCheque
    Inherits System.Web.UI.UserControl

    Public Event OnCancelC         


        

Answer 1

You can check out my response to a similar question here: creating and listening for events

Essentially, you want a user control to raise its own event, like this:

Partial Class myControl
    Inherits System.Web.UI.UserControl
    Public Event MyEvent As EventHandler

    'your button click event
    Protected Sub bnt_click(ByVal sender As Object, ByVal e As EventArgs)
      'do stuff
      'now raise the event
       RaiseEvent MyEvent (Me, New EventArgs)
    end sub
end class

In this example, I raise the event when the user clicks a button within the user control. You can easily raise the event anywhere, such as when the control loads, using a timer, whatever.

Then, in the main page, you want to and an event handler to the user control, like this:

<mc:myControlrunat="server" ID="myControl1" OnMyEvent="myControl_MyEvent"  /> 

Now, in the code behind, you can add the event, like this:

Protected Sub myControl_MyEvent(ByVal sender As Object, ByVal e As EventArgs)
 'do stuff 
end sub

Answer 2

You can add the handler in the declaration of the user control in the listview, using OnCancelClick, as follows:

<asp:ListView ID="lvwNonTpProducts" runat="server" ItemPlaceholderID="ItemPlaceholder">
    <LayoutTemplate>
        <asp:PlaceHolder ID="ItemPlaceholder" runat="server" />
    </LayoutTemplate>
    <ItemTemplate>
        <TPCustomControl:UcPaymentCheque ID="UcTPPaymentCheque" runat="server" Visible="false" OnCancelClick="UcTPPaymentCheque_OnCancelClick" />
    </ItemTemplate>
</asp:ListView>

Where UcTPPaymentCheque_OnCancelClick is the function you should use to handle the event, in the control that contains the listview.