#Regular expression not alphanumeric how to#

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.Д¬hecks whether the value entered by the user matches the regular expression pattern. GetValidationResult(Object, ValidationContext)Д¬hecks whether the specified value is valid with respect to the current validation attribute. Returns a value that indicates whether this instance is equal to a specified object.ДЇormats the error message to display if the regular expression validation fails. When implemented in a derived class, gets a unique identifier for this Attribute. Gets a value that indicates whether the attribute requires validation context. Gets or sets the amount of time in milliseconds to execute a single matching operation before the operation times out. Gets the localized validation error message. Gets or sets the resource type to use for error-message lookup if validation fails. Gets or sets the error message resource name to use in order to look up the ErrorMessageResourceType property value if validation fails. Gets or sets an error message to associate with a validation control if validation fails. Initializes a new instance of the RegularExpressionAttribute class. For a search hit, prepend and append the pattern with. The regular expression searches for an exact match, not using ^ before and $ at the end of the pattern produces the same results as using it. To validate that the value is not null or an empty string, use the RequiredAttribute attribute. If the value of the property is null or an empty string (''), the value automatically passes validation for the RegularExpressionAttribute attribute. The Pattern property contains the regular expression. The regular expression enables you to specify very precisely the format of valid values. You apply the RegularExpressionAttribute attribute to a property when you need to validate values for the property against a regular expression.

Use custom = 'Characters are not allowed.')] Allow up to 40 uppercase and lowercase In the associated metadata class, applies the RegularExpressionAttribute attribute to the FirstName and LastName data fields, specifying the pattern and custom error messages. Implements a metadata partial class and the associated metadata class. The example performs the following tasks:

The regular expression allows up to 40 uppercase and lowercase characters.

#Regular expression not alphanumeric how to#

The following example shows how to use the RegularExpressionAttribute attribute to validate the FirstName and LastName data fields. Inherit ValidationAttribute Public Class RegularExpressionAttribute

Public class RegularExpressionAttribute : In this article public ref class RegularExpressionAttribute : System::ComponentModel::DataAnnotations::ValidationAttribute Specifies that a data field value in ASP.NET Dynamic Data must match the specified regular expression.