Required Fields

Field Controls can be set to be Required. This means that the field must have a non-null value before any subsequent submit action can be permitted.

For example, a button control will not trigger any associated events unless all of the Required Fields that are before the button control in the Page Outline have non-null field values.

If a button is clicked when a Required Field has a null value then the user will be prompted to enter data into this field.

Steps

Create a new field and add a corresponding field control onto the page.

Create a button control after the field control on the page.

Select the field control. Go to it's properties tab and click the Required checkbox.

Run the form and then, without entering any value into the field, click on the button. You will notice that you are prompted to enter a value into the field.

Now move the button control so that it is before the field control on the Page Outline.

Run the form again and then, without entering any value into the field, click on the button. You will notice that you are not prompted to enter a field value this time.

This is because there are now no required field controls that are before the button control in the page.