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asp.netweb-controlsservercontrols

How do I make my ASP.NET server control take an embedded code block as a property value?

I have a custom server control with a property of Title. When using the control, I'd like to set the value of the title in the aspx page like so:

<cc1:customControl runat="server" Title='<%= PagePropertyValue%>' >
more content
</cc1:customControl>

When I do this, however, I am getting the exact String <%= PagePropertyValue%> being displayed rather than the Property Value that I would like to see.

So after trying the databinding expression (as suggested below). I don't get the string literal that looked bad but I don't get anything else either. 

<cc1:customControl runat="server" Title='<%# PagePropertyValue%>' >
more content
</cc1:customControl>

What do I need to do to my custom control to take this sort of value? Or is there something I need to do to the page.

Solution

  • You cant. <%= %> will write the string directly to the response-stream, which happens after the server control is constructed. See this post for an explanation.

    So its either codebehind, or <%# + databinding as Zachary suggests.