Canada Visa Requirements:

Basic Document:-

Passport with at least two blank pages, valid for at least 7 months.

All previous passports.
Personal Bank Statement / Company Bank Statement for the Last Six (06) Months.
Bank Solvency Certificate.
Recent two (02) copy color photographs. 
TIN / Income Tax Certificate - if any - LAST 03 YEARS

For Business Person:- 

Renewal Trade License Copy.
Certificate of Incorporation and Memorandum of your Company (only pages, where the directors' names are mentioned). (If you are an owner-director of a company)
Office pad / Company Letter Head Pad
Import & Export Certificate - if any
TIN / Income Tax Certificate - if any

For Job Holder:-

No Objection Certificate (NOC)
Salary Certificate.
Payslips - if any
G.O (Government Order) for Official Passport
BMDC certificate for Doctor 
BAR Council Certificate for Advocate

For Student:-

Student ID card Photo Copy.
Leave letter from school/college/university.

Other supporting documents (a) Parents, Siblings, Children's details ( name, date of birth, address, occupation, current country of residence ) (b) Visiting card (c) Marriage certificate (d) Birth certificate of children (e) Document of properties (f) Bluebook photocopy of the car if any (g) Document of other income if any (h) All documents of financial solvency like FDR/ Share business/ other savings/Security Deposit/cash investment, etc. (i) National Identity Card Copy. (j) Educational details (Institution name, program, address, session:-from-to)