A452 validating web forms mark schemes
Throwing an error under this circumstance can be a problem if you want your application to accept HTML markup.For example, if your site lets users add comments, you might want to let users add basic formatting by using HTML tags that put text in bold or italics.You will also create a custom validator with code that you write, which illustrates how you can add your own logic to the validation framework in the page.
You will work with some controls that perform all checking automatically, requiring no code.If you have already created a Web site in Visual Studio (for example, by working with the topic ), you can use that Web site and skip to "Adding Controls" later in this walkthrough. In effect, you write client script that duplicates the logic that your server-side validation performs.Writing client-side custom validation code is not always practical (for example, if the custom code validates a user's entry by looking in a server-side database).You will use a The validation you added to the Web Forms page illustrates the basic concepts of Web validation controls.An important aspect of validation is understanding how it helps you increase the security for your Web site.
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