last week i have submitted for family visa for a convection in torronto canada . I have also given the invitation from the convection and with perfect documents . What is the chanches of getting visa ?
It's very hard to say what your chances are since you haven't provided any details about your profile or what documents you included in the application.
However normally if someone is coming to Canada for a convention, this is a business trip and they would be coming alone rather than with their family.