Is there a list of all the country names and their country code, such as US, AUS, UK, etc available which I can re-use in my code? Any plain text format e.g .txt, .csv, etc, or mysql database format will be fine.
If there can be an additional list of various regions in the world, such as Western Australia, North America, etc, and the country names/codes which go in that region, that would be even more helpful!
Thanks.
Do you mean the ISO country codes? If yes, you can access them from databases. Maybe a quick query can sort you out.
The ISO codes mentioned by @duffymo are the best standard for country identifiers, but you may also want to look at the CLDR (Unicode Common Locale Data Repository) for hierarchical groupings like Regions.
Grab the current core archive, then look in common/supplemental/supplementalData.xml for the <territoryContainment> section. Note that the group identifiers do NOT correspond to the ISO country codes so your data store will have to handle both sets.
The CLDR supplemental data is also useful for answering related questions like the currencies and languages used in each region, time zone mappings, etc.
At least inside the .NET Framework you can get the list by using the CultureInfo class. I remember barely a static function to get a list of all usable Cultures in the current environment.