Initializing help system before first use

# Entity Validation

The AutoForm and AutoTable components have built-in validation.

They take account of the data type from the underlying entity to give you the simplest level of client-side validation. This is not a security feature but assistance to the user when entering data, to notify them if they have entered either the wrong type of data or have left the input field empty.

As your application develops, you will almost certainly need additional input validation depending on your applications requirements. For example, you might want to validate a string field to be a valid credit card. This is achieved with custom formatters specified at the entity level and is described in a later section. The built-in validation covers you for simple cases.

## input-form example

It is worth taking some time to explore the features of your new AutoForm by doing the following:

- See what happens when you input data with each type of input field.
- Notice that the data changes when you move focus from an input field.
- Try entering different or no values and seeing when the validations notify you of invalid input.
- Notice that you can back out of an edit with the Escape key on your keyboard.

Taking some time to familiarize yourself with the workings of the AutoForm now will lead to fewer surprises when you develop more complex input forms and will help you field questions from the end users of your application.

Parent Topic The AutoComponents

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