Ventuz Forum

Hi all,

I'm trying to get a boolean output from a string expression. Simply, if there is no text (null) give me 1, if there is some text give me 0. I'm using the following but to no avail.

A == "" ? 1 : 0

How do I express a null value in a String Expression?

I'm getting 'cannot convert int to string'.

Thanks,
Chris

Does it have to be an expression? I'd just use the "String Length" node, you feed the string into it and it gives you a number of informative outputs, among them a boolean as to whether the string is empty.

http://www.ventuz.com/support/help/late ... tions.html

You can use the IsNullOrEmpty() method.
Your Int expression should look like that: String.IsNullOrEmpty(A) ? 1:0
Check MSDN for further information.

By the way you cannot output a 0 or 1 in a string expression because the result has to be a string. But you can add a string arguement via the CustomModel to an Integer Expression.

Cheers!

Both of those were useful. Sorted!

Thanks a lot!

goats cheese