how can i bind one drop-down list from based on other drop-down selected value

Hi,
Have you tried following the idea from the How to work with depending fields article? You can use macro expressions to set desired value of the second drop down, based on the selection of the first drop down.

Hi,

You can take a look into this question here. It should be a good start, how to configure both dropdown's and how to pass data from one field into another one.

Best regards, Dragoljub