Hello to All

I am very new to DNN; however, I have over 15 year of programming experience. I have a question...

Can I modify the Registration Page so that I can add a custom DataType table (like the County and Region listing)?

Basically, I would like to add a Zip Code field (driven from a database table) and have it dynamically change based on a selection State. I would also like to build a custom drive "city" list to correspond with the zip code. (For example, if I select State (Region) = PA, and the Zip Code = 19107 then I would see an entry: Philadelphia. But in some cases a zip code could expand multiple towns so in this case, the user would have to select or add their own town - because it was missing from the list.)

If there's an out of the box solution please post there contact information? 

Thank you!

Thank you Sebastian! I'll have a look. So far I was able to identify the database structure and I was a little disapointed to see the countries and regions were all in same table. I'm not sure how I'll handle the zip codes. Most likely I will place them into a separate table and cross reference the Lists table. Again, thank you for you time.

Sebastian,

Thank you very much for pointing me in the right direction.  I found Charles Nurse's blog.  It was very informative!

Now I got something more to work with.

As for the table, I agree. It's not bad of a table, I can see how they have the hierarchical data set up, but I'm still
puzzled as to why they would do it that way. I guess I'll find out more as I try to add my parts and additional tables.

Once again, thank you very much. I look forward to interacting with you more in the near future. 

Cheers!