Girl in trouble - heeelp :)

I have a txt file with 3 columns.

1st column: cityid1

2nd column: cityid2

3rd column: distance between cityid1 and cityid2

My question is... How I can read that data from txt file, have one dropdown list (choose 1st city), then based on that dropdown, choose second dropdown list (choose a city), and then get the distance as the final result.1.txt

Attached Files

• 1.txt (115.7 KB)