Start Validating user input with c

Validating user input with c

Before accepting data from over the network you need to ensure all of the required fields have been filled out and conform to your formats and business rules. NET provides a number of validation controls to ease the burden of performing validation on both sides of the network. To walk along with the example, create a new web application in Visual Studio . Once the application is setup, right click on the empty web form, select Properties from the context menu, and change the Page Layout property to Flow Layout. Notice we need to check the Is Valid property of the base class before performing any critical action in the submit event.

Html Controls; namespace Web Data Validation When the user clicks the Cancel button we clear the Text Box control and allow the user to start over.

There are good reasons to always execute validation checks on the server.

Simply put, never trust the data in an incoming request, and always validate on the server.

When validation fails the normal flow of execution continues.

There are various validation controls availabe, and we will cover them in the rest of the article.

All of the validation controls derive from the Base Validator class, giving them common methods and properties.

We can double click on both of the Button controls on the form to add event handlers for the click events. If you want to disable just client side validation for a specific validation control, you can set the control’s Enable Client Script property to false. NET will always execute validation checks on the server when a button click event arrives requiring validation.