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VerificationRule Enumeration

Specifies how conditional expressions defined by an VerificationAttribute instance are used in verification.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public enum VerificationRule

Member nameDescription
RequiredThe conditional expression specified in an VerificationAttribute instance is required.
ProhibitedThe conditional expression specified in an VerificationAttribute instance is prohibited.
NotEmptyStringThe conditional expression specified in an VerificationAttribute instance must have a left hand side that is not an empty string ("").

When using extending a class, member or indexer with a VerificationAttribute, you may define how the conditional expression, defined by the ConditionalProperty and ConditionalValue properties, is used by specifying one of the VerificationRule values. If in the creation of the VerificationAttribute no VerificationRule is specified, the default value of Required is used.

The left side of a verification rule's conditional expression is the ConditionalProperty and the right side is the ConditionalValue. The VerificationConditionalOperator specifies how the ConditionalProperty is to be compared to the ConditionalValue.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0