I have a drop down list in the infopath form and based on the selection(Only if aprticular value is selected ) in dropdown listbox need to make some of the controls as mandatory in the infopath form. This has to be done using rules. I am not planning to use any custom code in my form. How this can be achieved? Please Help !!
closed as off topic by Anders Rask♦ Jan 2 at 20:22
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Click Manage Rules to open the Rules interface. Click the cell that needs a rule. Click the New button and select Validation. Click the condition hyperlink and set it to your dropdown field is blank. Add a message into the screentip section and you'll be all set.