Excel To CSV And Preserving Format?

I have a template that works from Excel, but is saved in a .csv by default because .csv is the only compatible file format with the database we use. I have one column that I need to be in a "text" format, and another column that must be in a number format with no decimal place approximations (whole numbers). I know how to go in and format these columns myself, but it is clear that .csv does not like it. Every time I open the file, it resets the formatting in my columns. So, I have to re-format these columns every time I open or re-open the file. If there's information in this file, I have to re-format my columns and re-enter my information so that it is formatted correctly. For example, my first column must be text because it will have things like 001,002,003 etc. I tried using a custom format ###, which did not work. If I save the file and leave it alone, it preserves the format when I import into the database. If I have to re-open it to add something or make changes, all of my first column info is now standard numbers like 1,2,3 etc. So, I reformat the columns, and I have to re-enter 001,002,003 etc. This gets annoying after awhile, especially if my sequences (numbers) go into the triple digits.

Obviously, there's no easy way around this due to the features of a .csv file. So, I would like to add code that executes on file start-up (or open). I want this code to format my columns as stated before, one column must contain text format, another has numerical format with whole number approximation.