Visa types granted by Bangladesh are;

• Bangladesh e Visa
• Bangladesh Visa On Arrival
• Bangladesh Long-Stay Work Visa
• Bangladesh Journalist Visa
• Bangladesh Business visa
• Bangladesh Tourist visa
• Bangladesh Long-stay Study Visa
• Bangladesh Diplomatic and Official Visa
• Bangladesh Government Delegates
• Bangladesh Diplomatic / other Embassy officials Visa
• Bangladesh UN and other International Organizations visa
• Bangladesh Invitation letter from Bangladesh
• Bangladesh Letter from the company that is sending the applicant to Bangladesh
• Bangladesh Investor visa
• Bangladesh Recommendation letter from BOI/BEPZA
• Bangladesh Work / Employment visa
• Bangladesh Letter of appointment from the employer in Bangladesh
• Bangladesh Recommendation letter from BEPZA/BOI
• Bangladesh NGO workers’ visa
• Bangladesh Permission Letter from NGO Affairs Bureau, Bangladesh
• Bangladesh Expert Visa
• Bangladesh Recommendation letter from BEPZA/BOI
• Bangladesh Invitation Letter from the concerned company in Bangladesh
• Bangladesh Student visa
• Bangladesh Letter from Educational Institution
• Bangladesh Bank solvency certificate
• Bangladesh Research Visa
• Bangladesh Letters from the concerned institutions of the both ends
• Bangladesh Consent letter of the concerned Ministry in Bangladesh
• Bangladesh Invitation letter from Dhaka/Hotel Booking
• Bangladesh Tentative flight itineraries
• Bangladesh TabligJamaat visa
• Bangladesh Letter from central Markas of the country
• Bangladesh Letter from Bangladesh Tablig Markas
• Bangladesh Journalist visa
• Bangladesh Filled in FF-1 and FF-2 forms
• Bangladesh Photocopy of the first five pages of the passport
• Bangladesh Original passport and necessary payment receipt only after Embassy’s clearance
• Bangladesh Flight particulars when clearance is conveyed
• Bangladesh Spouses and dependents of all categories (except the person attending TabligJamaat and Tourists Visa)
• Bangladesh Certification/necessary letter in support of relations

You may find these articles helpful. Don't forget to take a look!

• Do You Need Visa to Visit Bangladesh?
• Bangladesh Visa Types
• Bangladesh Visa Photo requirements
• Get Bangladesh visa online or through embassy
• Bangladesh Visa Cost
• Document Requirement for Bangladesh Visa
• Can Travelers Apply for a Bangladesh Visa Extension