Codeeffect Rule Engine - How to define rules to check length of string

Question

I have to define a rule like <> length is < 5 or >5 AND not equal to 'N/A'.

I am not able to get Len() function in the list of operators for the string data type.

Please suggest if any field level attributes needs to define.

Answer 1

In your source class define a method like this:

public int Length(string str)
{
   return string.IsNullOrEmpty(str) ? 0 : str.Length;
}

Then run your project, open the rule editor and create your rule like this:

Check if YourString has any value and Length(YourString) is greater than [5]

Details on in-rule methods can be found here