Well no one gave the perfect answer because there is no hard and fast rule or purrrfecct answer to dress code , now let me tell you in my company i wear tshirts, jeans, chappals, also but no one tells anything, there is no dress code in our organisation and neither it is required. Just because i wear any dress does not mean you can do same and just because some person mentioned dress code is essential also does not mean that dress code is essential.
Now coming directly to the bulls eye Mr.Asif of Bangaladesh, you never mentioned what industry is yours and what type of people work there. Once you mention the type of industry and work that goes on there, then people will be able to suggest you. Also on your industry type you have to mention the severity of dress code, for some industries the dress is image as mentioned by Mr.Bhatia, so for mc donalds or airlines even a bit of compromise in dress code will not be tolerated, hence post your industry type and then take the custom reply of people dont follow any advice without thinking about your custom needs.