as a matter of interest what is the syntax that you are using? How would one know to put the entire string inside brackets after the @ symbol? Where can i learn more about how to do this?
Radzen generates Razor Pages and has it's own logic for how ${data.Address} is translated into @(namespaceDatasourceNameModelName.Address) during generation. So when that logic doesn't fit the bill, you can always drop the dollar sign and go to straight Razor syntax with @(some razor syntaxt c# code here).
I'm sure there's a better explanation but that's my limited understanding and I just try things till it works.
the first example could be misleading cuz it adds c# string interpolation (completely different dollar sign than that used in Radzen) which is why I included the second example explicitly using string.Format()