Interacting with custom controls in AppointmentTemplate

[Matt]

I have customized my AppointmentTemplate by adding some controls (Labels and ImageButtons).
I need to access those controls to change values based on info I have in my Appointment object.
My first approach was just using Eval() to toggle the visibility of a LinkButton in the markup based on a custom attribute like this:
            <AppointmentTemplate>
                <p>
                    <h2><%# Eval("Subject") %></h2><br />
                </p>
                <p>
                    <h3><%# string.IsNullOrEmpty(Eval("Attributes['gst_name']").ToString().Trim()) ? "" : "with: " + Eval("Attributes['gst_name']") %></h3>
                </p>
                <p>
                     <asp:ImageButton id= "ibNotes" ImageUrl="~/Images/note.png" runat="server" CommandName="GetNote" Visible = "<%# Eval("Attributes['notelength']") = "0" ? "false" : "true" %>"/>

                </p>
                <p>
                    <h3>AppointmentTemplate<%# Eval("Attributes['modifiers']") %></h3>
                </p>
            </AppointmentTemplate>

But I can't build with it this way. I get an error: "The server tag is not well formed." Referring to my ImageButton location.

So I tried another approach, to get to it in codebehind, but I can't get anything working there either.
What server side event should I use? I'm thinking I'd need to use FindControl() but can't find anything in Intellisense.

Anyone got an example?

Thanks!

Matt

[Peter]

Hello Matt,

I am not sure if you have seen the new demo on Customizing the Appointment. Probably, it can help you resolve the problem.

Let me know how it goes.

All the best,
Peter
the Telerik team