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If you disable Java Script in your browser, then submit the form with errors, the break point will be hit. The following image shows how to disable Java Script in Internet Explorer.The following image shows how to disable Java Script in the Fire Fox browser.If there are no errors, the method saves the new movie in the database.In our movie example, the form is not posted to the server when there are validation errors detected on the client side; the second method and verify the method is never called, client side validation will not submit the form data when validation errors are detected.If you want to change the validation logic later, you can do so in exactly one place by adding validation attributes to the model (in this example, the class).You won't have to worry about different parts of the application being inconsistent with how the rules are enforced — all validation logic will be defined in one place and used everywhere.The Regular Expression attribute is used to limit what characters can be input. Code First ensures that the validation rules you specify on a model class are enforced before the application saves changes in the database.For example, the code below will throw a Db Entity Validation Exception exception when the Having validation rules automatically enforced by the .
You can verify this by putting a break point in the HTTP Post method, by using the fiddler tool, or the IE F12 developer tools.NET Framework helps make your application more robust.It also ensures that you can't forget to validate something and inadvertently let bad data into the database.The following image shows how to disable Java Script in the Chrome browser. They automatically look for validation attributes specified on the model and display error messages as appropriate.