InfoPath Dev

How to put validation in drop-down field in infopath. eg: country: Drop-down (Values-Others, UK,USA,INDIA,JAPAN,NEPAL). without select country if click on next page button then it would not be redirect and say "please select country " Thanks

You have a few options for this - I probably wouldn't use a validation rule, but would either disable the next button if the country wasn't selected, or would add rules to handle for the issue on the next button. In the attached form, I'm demonstrating the second technique. Save the form locally, right click and select Design to open in design mode, then preview.