Thread: Assigning Event Handler to Repeater in Custom Control

I have written a custom control to render a check box list to the page. The default .NET one didn't render to my page correctly because I needed to Enable / Disable the checkboxes depending on user permissions.

What I now need to do is add an OnItemDataBound event to the repeater inside the control by assigning it a sub from my page.

Basically I want to be able to have in my page:-

Code:

myCustomControl.OnItemDataBound = ASubRoutineInMyPage
.
.
protected void ASubRoutineInMyPage(object s, RepeaterItemEventArgs e)
{
.
.
.
}

I'm not entirely sure what I should have in my custom control to expose this method, allow me to apply my own subroutine to it and then execute this OnItemDataBound event when my control loads.

Any ideas or examples I could try?

I want to reuse the control in a number of pages and so need to be able to call a different routine depending on the page, or no event at all.

See here: How To : Expose events from UserControl - CodeProject

Still not quite getting it. This is what I have

Code:

    public delegate void RepeaterDelegate(object s, RepeaterItemEventArgs e);
    protected event RepeaterDelegate _ItemDataBound;
    public event RepeaterDelegate ItemDataBound
    {
        add
        {
            if (this._ItemDataBound == null) this._ItemDataBound += value;
        }
        remove
        {
            if (this._ItemDataBound != null) this._ItemDataBound -= value;
        }
    }

    public virtual void OnItemDataBound()
    {
        RepeaterItemEventArgs evt = new RepeaterItemEventArgs(item);
        if (this._ItemDataBound != null) this._ItemDataBound(this, evt);
    }

But I don't understand where I get the repeater item instance required in my OnItemDataBound void (highlighted in red).

In the example in the link, the event is added to a dropdownlist. In this I need to add it to a repeater item, I think.

I tried adding a foreach (repeateritem item in myRep.items) and there were no errors, but none of the checkboxes that should have been checked, were. I will check the logic in my repeater item sub, but it was working fine when it was in the User Control code behind. Maybe I'm missing a value in it somewhere.

OK. I just tried changing something in the sub that I want called OnItemDataBound and nothing changed in the page, so I guess it's not calling it or not calling it correctly.

OK. I've sort of given up with this now. I realised that the rendering of the checkboxes was related to one specfic use and so that would have meant changing this as well to reuse the control.

I'd still like to get this sorted if possible. Basically I want to be able to pass event handlers from my page to my user control and then attach them to a repeater inside the control.

Will take a look at composite controls when I get the chance.

Thanks