hi to all

hi..i'm a newbie here and i'd like to ask some questions about visit visa..i'm from a gcc country and i'm working in the airlines for 23 yrs.now.last oct.my asian wife for 19 yrs. applied for a trv but was denied due to regulations 179..she's 60 yrs.old and she doesn't have any travel history except travelling to her home country and twice to bangkok..she showed her own account with a 5k usd with it and a letter from me that i'll be the one who will shoulder her trip.she's not working and she's a permanent resident here.i wasn't able to apply with her cause of my workload..my question is is there any chance of getting a trv if we applied together and i'll be the principal applicant or can she applied alone with an invitation letter from a male  friend of mine who's a canadian citizen..actually i don't want to travel anywhere except her home country but she really wishes to visit canada and see the nice places there for a week or 10 days at the most..any advice would be most welcome..thank you...