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In the controller defined the methods for binding Country and City dropdown lists. Now run the code and you will find that all the validations are working well as expected.

I hope you will enjoy the tips while programming with MVC Razor.

These SESSION arrays are helpful in retrieving the form and validation data on "index.php" php: Functions used to validate, store and retrieve the form data Function "set Value" inserts a field name and the corresponding value submitted by the user to the array "values" on "process.php".

Function "set Error" inserts a field name and the corresponding error messages to the array "errors" on "process.php".

Function "value" returns the value submitted by the user corresponding to the field name passed as the argument.

Function "error" returns the error message corresponding to the field name passed as the argument.

Since registration form is a common form, so I prefer it to demonstrate the basic validation in ASP. I have already explained the validation with data annotation and how to enable client side validation in mvc razor, now my focus is to develop registration form with client side and server side validations.

As an answer to this problem most sites will use both forms of validation.

Now design the strongly-typed view on the basis of Registration Model.

We will also register the client side validation that we have defined in model for the dropdownlist and checkbox by using jquery as shown below. We should also check all the validation at server side by checking Is Valid property of Model State.

Follow the below steps to do the server side validations.

Server side validation is most secure way than client side validation, because client side validation can be bypass through script manipulation tools.