This article explains how to calculate a person's age (in years) given his/her date of birth in InfoPath. It can be done without writing even a single line of code.
What we need to do?
We only need to use rules, conditions, the today() function, the number() function, and the substring() function in InfoPath to calculate a person's age given his/her date of birth.
Use the following procedure to do it.
1. Create a new Blank Form in InfoPath.
![Blank Form in InfoPath]()
2. Design the form as below:
![Design the form]()
3. Right-click the "Age" TextBox and make it read-only.
![Age Textbox]()
4. Select the Date of Birth Control.
![Date of Birth Control]()
5. Select the Manage rule from the ribbon.
![Manage rule from ribbon]()
6. Add a new Action.
![Add a new Action]()
7. In the Action select "Set A field’s Value".
![fields Value]()
8. In the field select "Date of Birth".
![Select date of Birth]()
9. In the value select the function icon.
![Select function Icon]()
10. Add the following formula:
number(substring(today(), 1, 4)) - number(substring(., 1, 4))
11. Finally you will get the preview as below:
![Formula]()
ResultThe age in years will be displayed depending on the selected Date of Birth.