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Asp code validating a form

The following two mutually inclusive properties list out the error message: Complex pages have different groups of information provided in different panels.In such situation, a need might arise for performing validation separately for separate group.

You can use it to make sure that the user has entered something in a Text Box control.Let's give it a try, and add a Required Field Validator to our page.We will also add a Text Box to validate, as well as a button to submit the form with.Some resources also refer to Jscript (Microsoft) and ECMAScript (European Computer Manufacturer's Association), but these are both derivatives of Java Script.Since only Microsoft Internet Explorer supports VBScript, you'll probably choose Java Script as your primary scripting language to use on a user's computer.The client side validation is accomplished through the Client Validation Function property.

The client side validation routine should be written in a scripting language, such as Java Script or VBScript, which the browser can understand.

Actually, that's all we need to test the most basic part of the Required Field Validator. Validation is only performed serverside if necessary!

I'm sure that all the attributes of the controls makes sense by now, so I won't go into details about them. You should see something like this: If your browser supports Java Script, which most modern browers do, then you will notice that the page is not being posted back to the server - the validation is performed clientside! To see how it feels, you can add enableclientscript="false" to the Required Field Validator and try again.

The server side validation routine must be called from the control's Server Validate event handler. The basic syntax for the control is as given: The Validation Summary control does not perform any validation but shows a summary of all errors in the page.

The server side validation routine should be written in any . The summary displays the values of the Error Message property of all validation controls that failed validation.

He has been a featured speaker at many industry events including Microsoft Dev Days and the ASP. Shannon speaks and trains for companies such as App Dev ( and Learn It ( and has been a featured speaker in training videos with Learn Key. Data validation over the Web is performed in one of two locations: on the user's computer, or on the Web server.