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ValidationAttribute Class

Serves as the base class for all validation attributes.

System.Object
  System.Attribute
    System.ComponentModel.DataAnnotations.ValidationAttribute
      More...

Namespace:  System.ComponentModel.DataAnnotations
Assembly:  System.ComponentModel.DataAnnotations (in System.ComponentModel.DataAnnotations.dll)

public abstract class ValidationAttribute : Attribute

The ValidationAttribute type exposes the following members.

  NameDescription
Protected methodSupported by Portable Class LibraryValidationAttribute()Initializes a new instance of the ValidationAttribute class.
Protected methodSupported by Portable Class LibraryValidationAttribute(Func<String>)Initializes a new instance of the ValidationAttribute class by using the function that enables access to validation resources.
Protected methodSupported by Portable Class LibraryValidationAttribute(String)Initializes a new instance of the ValidationAttribute class by using the error message to associate with a validation control.
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  NameDescription
Public propertySupported by Portable Class LibraryErrorMessageGets or sets an error message to associate with a validation control if validation fails.
Public propertySupported by Portable Class LibraryErrorMessageResourceNameGets or sets the error message resource name to use in order to look up the ErrorMessageResourceType property value if validation fails.
Public propertySupported by Portable Class LibraryErrorMessageResourceTypeGets or sets the resource type to use for error-message lookup if validation fails.
Protected propertySupported by Portable Class LibraryErrorMessageStringGets the localized validation error message.
Public propertyRequiresValidationContextGets a value that indicates whether the attribute requires validation context.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodSupported by Portable Class LibraryEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodSupported by Portable Class LibraryFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Portable Class LibraryFormatErrorMessageApplies formatting to an error message, based on the data field where the error occurred.
Public methodSupported by Portable Class LibraryGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodSupported by Portable Class LibraryGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Portable Class LibraryGetValidationResultChecks whether the specified value is valid with respect to the current validation attribute.
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodIsValid(Object)Determines whether the specified value of the object is valid.
Protected methodSupported by Portable Class LibraryIsValid(Object, ValidationContext)Validates the specified value with respect to the current validation attribute.
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodSupported by Portable Class LibraryMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Portable Class LibraryToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodSupported by Portable Class LibraryValidate(Object, ValidationContext)Validates the specified object.
Public methodValidate(Object, String)Validates the specified object.
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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ExceptionCondition
ValidationException

The ErrorMessageResourceType and ErrorMessageResourceName properties for localized error message are set at the same time that the non-localized ErrorMessage property error message is set.

This class enforces validation, based on the metadata that is associated with the data table. You can override this class to create custom validation attributes.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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