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System.Web.UI.WebControls (system.web.dll)class

The RegularExpressionValidator is a type of validation control that compares an input control against a pattern specified in the ValidationExpression. Regular expression validation is ideally suited for verifying predictable sequences of characters, such as those in social security numbers, email addresses, telephone numbers, and postal codes. Validation will succeed if the input control is empty, unless you also use a RequiredFieldValidator control.

Validation is always performed on the server. If the client browser supports JavaScript, validation will be performed there as well, which can save a roundtrip if errors are present. The regular expression validation performed by the JavaScript code is a subset of the full System.Text.RegularExpressions.Regex syntax. Support for it is client-dependent, and the RegularExpressionValidator will not attempt to perform client-side regular expression validation on any browser other than Internet Explorer.

public class RegularExpressionValidator : BaseValidator {
// Public Constructors
   public RegularExpressionValidator( );
// Public Instance Properties
   public string ValidationExpression{set; get; }
// Protected Instance Methods
   protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer);// overrides BaseValidator
   protected override bool EvaluateIsValid( );                    // overrides BaseValidator


System.Object System.Web.UI.Control(System.ComponentModel.IComponent, System.IDisposable, System.Web.UI.IParserAccessor, System.Web.UI.IDataBindingsAccessor) WebControl(System.Web.UI.IAttributeAccessor) Label BaseValidator(System.Web.UI.IValidator) RegularExpressionValidator

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