Type Parser

If you require extracting positional strings and converting the values into their final forms, such as obtaining a string representing a datetime or currency, you can create an interceptor reader by implementing the ITypeParser interface. This allows you to perform custom actions before the value is set to the final property.

here and example of intercept the property read.

    public class ParserWebSite : ITypeParser
    {
        public object Parser(object propertyValue)
        {
            return $"WebSite: {propertyValue.ToString()}";
        }
    }
        
    [ReadProperty(start: 9, length: 20, type: typeof(ParserWebSite))]