How To Apply Conditions To Databound Objects

I use a repeater on my website.

My code for this example is

<ItemTemplate>
Item: <%#DataBinder.Eval(Container.DataItem, "Col")%><br>
</ItemTemplate>

Now, depending on the result of the dataitem will depend on what I want to display. For example, The databitem may show a true or false value, and depending on which one I want to show a different result on my page. So instead of it display true, it display a string. EG, if true, the text 'in stock' would display.

At the moment, I am using a method to call a function (please correct my terminology - or let me know my terminology is right!).

html:

<ItemTemplate>

Item:

<%#CB(DataBinder.Eval(Container.DataItem, "Col"))%><br>
</ItemTemplate>

code behind:

public string CB(object o)
{
//perform something
return string.format("");
}

Is this the best way as it appears to be an ugly fix in my opinion. Especially as I have several items on my page which will have to use this (ususally just checking if there is a value in the dataitem or if it is empty/null)