You CAN'T use C# expressions in {{}} blocks because Angular knows nothing of C# - it's processing in JavaScript code.

If you're generating server side stuff, then use the @Razor syntax to embed expressions otherwise you need to use JavaScript expressions that are in scope for your Angular application.

+++ Rick ---

>>Eeeek...
>>
>>You should make your life easier and use ng-show/ng-hide expressions with [span] elements to display/hide content like this. Much easier to deal with than these long expressions...
>>
>>And... aren't those expressions C# expressions? Angular can only render values from you model and some limited JavaScript. Pretty sure String.IsNullOrWhiteSpace() and TrimEnd() don't exist in JavaScript and even if it did Angular wouldn't understand it because it's limited to a very small subset of JavaScript.
>>
>>+++ Rick ---
>>
>
>Thanks, Rick. For some reason I thought we should use C# in the {{}} blocks. At least C# null expressions work fine, e.g.
>
>if (condition)? expr1: expr2
>
>Anyway. I simplified this expression and removed checks for empty stuff (these columns should not be empty anyway).