while it's very difficult to get a visitor visa when married to a canadian and applying for pr, it is not impossible. there are some applicants on this forum who have been successful. the key seems to be for the applicant to prove they have a reason to return to thir country when their visa expires. CIC automatically assumes having a spouse in canada means you're not likely to return home. So it's the applicant's responsiblity to prove ties to land, housing, or a job in their home country. generally, having family, a car or bank accounts to go back to are not considred strong enough ties. Also, Canadian sponsors make the mistake of showing their own financials to help prove the visitor will be taken care of. this can backfire, because CIC isn't concerned about the financials of the canadian, they are concerned with the financials and ties of the person applying for a visa. Lastly, how long the applicant asks to stay for can work against them. Generally it's been suggested to NOT ask for an initial stay for longer than 2-3 weeks because that is the "right" amount of time a normal everyday person would be able to travel away from the homelife without issue. Generally, it's tough to convince CIC the person will have ties to go back to if they are requesting months away from their home. Once the person is in, THEN they can apply to extend their stay for longer term.
generally, it has been reported to be easier to obtain a visitor visa BEFORE getting married and applying for pr. Once the person is in Canada, they can apply to extend their stay, and submit proof a pr application has been submitted. generally speaking, PR applicants are rarely refused extensions.
Either way, having a visitor visa refused will not negatively affect the pr application. If all else fails, and you, the sponsor are a canadian citizen, you can move to India during the processing to be with your wife if you choose. if you are a PR yourself, you will have to live in Canada until she is approved.
