Validation

The Validation library is an option you can add to your project which checks if the input fields on your are valid.

If a field is invalid, a message in red appears next to the field.

Validation doesn't kick in until you ask it to validate the form. This lets the operator input data undisturbed. As fields are corrected, the error messages disappear.

The intent of this Tech Note is to get you started using the Validation library. It has many options and features beyond what is documented here. We encourage you to read the full documentation. Here are a couple of useful documents:

• Official jQuery Validation site: https://jqueryvalidation.org/
• The Most Indispensable jQuery Form Validation Reference Guide: http://javascript-coder.com/form-validation/jquery-form-validation-guide.phtml

Turn on Validation

The first step is to add the Validation library to your project. Select "Project Properties and Global Code" in the Project Explorer, then Select Validation in the Toolbox.

Initialize Validation

When you start your app, you'll need to initialize your validation rules. Create a function for this and call it at startup. The NSB.validation statement will have the name of the form you want to check as its first argument.

BASIC

Sub Main()
  initValidation()
End Sub

Sub initValidation()
  Dim validateRules = { _
    rules: {} _
    messages: {} _
  }
 
  NSB.validation(Container1, validateRules)
End Sub

JavaScript

function Main() {
  initValidation();
};

function initValidation() {
  var validateRules = {
    rules: {},
    messages: {},
  };

  NSB.validation(Container1, validateRules);
};

Set up the Validation Rules

Each field you want to validate will have a Rule and a Message. Here is a simple rule and a message:

Rule: Input1: "required"
Message: Input1: "This field is required.