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Validating dates with comparevalidator in 2 0

validating dates with comparevalidator in 2 0-77

This paper focuses on a series of controls that stand out from the rest—.

You can use the validation controls with browsers that do not support Java Script (or do not have Java Script enabled).The login form appeared in the left column and the registration form appeared in the right column. A validation group enables you to group related form fields together.If both forms included validation controls, then submitting the login form caused any validation controls contained in the registration form to be evaluated. For example, the page in Listing 3.5 contains both a login and registration form and both forms contain independent sets of validation controls. Because the form fields are grouped into different validation groups, you can submit the two forms independently.If a browser does not support Java Script, the form must be posted back to the server before a validation error message is displayed.Even when validation happens on the client, validation is still performed on the server. If someone creates a fake form and submits the form data to your web server, the person still won't be able to submit invalid data.In the first part of this chapter, you are provided with an overview of the standard validation controls included in the ASP. You learn how to control how validation errors are displayed, how to highlight validation error messages, and how to use validation groups.

You are provided with sample code for using each of the standard validation controls.

NET Summary: Learn how to use all the available ASP.

This paper introduces these new controls and discusses tips and tricks on working with them in practical scenarios.

(34 printed pages) Introduction Looking at Validation The Required Field Validator Control The Compare Validator Control The Range Validator Control The Regular Expression Validator Control The Custom Validator Control The Validation Summary Control Conclusion In your studies of ASP.

NET, you might have been introduced to a number of different types of controls, whether HTML server controls or Web server controls.

Because you do not normally develop a web application with a downlevel browser, you won't notice the problem described in this section until you start getting invalid data in your database tables. That way, if other content is displayed next to the validation control, the content is not pushed to the right.