.NET Framework Class Library
ValidationAttribute Class

Serves as the base class for all validation attributes.

Inheritance Hierarchy
SystemObject
   SystemAttribute
    System.ComponentModel.DataAnnotationsValidationAttribute
      More...

Namespace:   System.ComponentModel.DataAnnotations
Assembly:  System.ComponentModel.DataAnnotations (in System.ComponentModel.DataAnnotations.dll)
Syntax
Public MustInherit Class ValidationAttribute _
	Inherits [%$TOPIC/cc679227_en-us_VS_110_2_0_0_0_0%]
public abstract class ValidationAttribute : [%$TOPIC/cc679227_en-us_VS_110_2_0_1_0_0%]
public ref class ValidationAttribute abstract : public [%$TOPIC/cc679227_en-us_VS_110_2_0_2_0_0%]
[<[%$TOPIC/cc679227_en-us_VS_110_2_0_3_0_0%]>]
type ValidationAttribute =  
    class 
        inherit [%$TOPIC/cc679227_en-us_VS_110_2_0_3_0_1%] 
    end
public abstract class ValidationAttribute extends [%$TOPIC/cc679227_en-us_VS_110_2_0_4_0_0%]

The ValidationAttribute type exposes the following members.

Constructors
  NameDescription
Protected method Supported by Portable Class Library ValidationAttributeInitializes a new instance of the ValidationAttribute class.
Protected method Supported by Portable Class Library ValidationAttribute(FuncString)Initializes a new instance of the ValidationAttribute class by using the function that enables access to validation resources.
Protected method Supported by Portable Class Library ValidationAttribute(String)Initializes a new instance of the ValidationAttribute class by using the error message to associate with a validation control.
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Properties
  NameDescription
Public property Supported by Portable Class Library ErrorMessageGets or sets an error message to associate with a validation control if validation fails.
Public property Supported by Portable Class Library ErrorMessageResourceNameGets or sets the error message resource name to use in order to look up the ErrorMessageResourceType property value if validation fails.
Public property Supported by Portable Class Library ErrorMessageResourceTypeGets or sets the resource type to use for error-message lookup if validation fails.
Protected property Supported by Portable Class Library ErrorMessageStringGets the localized validation error message.
Public property RequiresValidationContextGets a value that indicates whether the attribute requires validation context.
Public property TypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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Methods
  NameDescription
Public method Supported by Portable Class Library EqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected method Supported by Portable Class Library FinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method Supported by Portable Class Library FormatErrorMessageApplies formatting to an error message, based on the data field where the error occurred.
Public method Supported by Portable Class Library GetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public method Supported by Portable Class Library GetTypeGets the Type of the current instance. (Inherited from Object.)
Public method Supported by Portable Class Library GetValidationResultChecks whether the specified value is valid with respect to the current validation attribute.
Public method IsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public method IsValid(Object)Determines whether the specified value of the object is valid.
Protected method Supported by Portable Class Library IsValid(Object, ValidationContext)Validates the specified value with respect to the current validation attribute.
Public method MatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected method Supported by Portable Class Library MemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public method Supported by Portable Class Library ToStringReturns a string that represents the current object. (Inherited from Object.)
Public method Supported by Portable Class Library Validate(Object, ValidationContext)Validates the specified object.
Public method Validate(Object, String)Validates the specified object.
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Explicit Interface Implementations
  NameDescription
Explicit interface implemetation Private method _AttributeGetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeGetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeGetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeInvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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Exceptions
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.

Remarks

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.

Version Information

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