Validating form behavior
If there were more than one form in the HTML document then you would see each of them listed in the form name drop-down menu. With the Check Select1 highlighted, be sure the Checkbox Any is selected, and then in the Error Message section, type in the following or something similar: Ensure this is the same setting for all the checkbox form elements. Click on the Radio Group1_0 form element in the menu list and be sure that One Of Them is selected, and then in the Error Message, add in something like While it is not necessary to add the same properties to all the other radio button elements, because of the nature of selecting at least one of them, you can add this for each of these radio button elements. In the Check Form dialog box highlight the Email Address form element, and then in the Input/Text area be sure that the selection Required (Empty values not allowed) is checked and that the E-Mail Address radio button is selected.
In the Error Message: field type in something similar to element. Now you can check your HTML form in your favorite browser from Dreamweaver. Try submitting the form without entering a proper email address or not checking one of the radio buttons, not making a drop-down menu selection, or not selecting from the checkboxes.
Several of the error messages may appear depending on what you select or omit in the form.
Previously I discussed how validation can be automatically triggered when properties changes, or manually triggered to validate all properties.
The Border Effect class is added to the control’s Effects collection if validation errors are present, otherwise it’s removed from the control’s Effects collection.
The Border Effect class subclasses the Routing Effect class, and is shown in the following code example: The Routing Effect class represents a platform-independent effect that wraps an inner effect that’s usually platform-specific.
You get to code and write your own pop-up messages based on rules that fail the validation tests upon form submission. Inside the opening The five form elements included in this form sample are the text field for email address entry, the radio group, the drop-down menu list, the checkbox selections, and the submit button.Responding to this situation, we introduced Configuration Validator, which will help users find their invalid configurations and maximize the rate of successful mail delivery. Don’t you think you might just not notice misconfiguration, and you actually have lost messages due to that?I strongly recommend doing a validation even if you don’t see any problems at this time.The following code example shows how the Validation behaviour is attached to an Entry control: The Validation attached behaviour gets and sets the Errors bindable property, and in this example binds it to the Errors property of the User model class that’s exposed by the associated view model. Errors property is provided by the Validatable Base class, from which all model classes derive, and is an instance of the Validator class.The indexer of the Validator class returns a Read Only Collection of error strings, to retrieve any validation errors for the Forename property.