AsyncValidationAttribute Class

Definition

Namespace:

System.ComponentModel.DataAnnotations

Assembly:

System.ComponentModel.Annotations.dll

Source:

AsyncValidationAttribute.cs

Base class for validation attributes that require asynchronous operations, such as database lookups or API calls.

Derived implementations must be thread-safe, as instances of this attribute might be invoked concurrently from multiple threads.

public ref class AsyncValidationAttribute abstract : System::ComponentModel::DataAnnotations::ValidationAttribute

public abstract class AsyncValidationAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute

type AsyncValidationAttribute = class
    inherit ValidationAttribute

Public MustInherit Class AsyncValidationAttribute
Inherits ValidationAttribute

Inheritance

Object

Attribute

ValidationAttribute

AsyncValidationAttribute

Constructors

Name	Description
AsyncValidationAttribute()	Default constructor for any async validation attribute.
AsyncValidationAttribute(Func<String>)	Allows for providing a resource accessor function that is used by the ErrorMessageString property to retrieve the error message.
AsyncValidationAttribute(String)	Constructor that accepts a fixed validation error message.

Properties

Name	Description
ErrorMessage	Gets or sets an error message to associate with a validation control if validation fails. (Inherited from ValidationAttribute)
ErrorMessageResourceName	Gets or sets the error message resource name to use in order to look up the ErrorMessageResourceType property value if validation fails. (Inherited from ValidationAttribute)
ErrorMessageResourceType	Gets or sets the resource type to use for error-message lookup if validation fails. (Inherited from ValidationAttribute)
ErrorMessageString	Gets the localized validation error message. (Inherited from ValidationAttribute)
RequiresValidationContext	Gets a value that indicates whether the attribute requires validation context. (Inherited from ValidationAttribute)
TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)

Methods

Name	Description
Equals(Object)	Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute)
FormatErrorMessage(String)	Applies formatting to an error message, based on the data field where the error occurred. (Inherited from ValidationAttribute)
FormatMessage(String, String)	(Inherited from ValidationAttribute)
GetHashCode()	Returns the hash code for this instance. (Inherited from Attribute)
GetType()	Gets the Type of the current instance. (Inherited from Object)
GetValidationResult(Object, ValidationContext)	Checks whether the specified value is valid with respect to the current validation attribute. (Inherited from ValidationAttribute)
GetValidationResultAsync(Object, ValidationContext, CancellationToken)	Tests whether the given value is valid asynchronously with respect to the current validation attribute without throwing a ValidationException.
IsDefaultAttribute()	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute)
IsValid(Object, ValidationContext)	Defines the synchronous validation behavior for this attribute.
IsValid(Object)	Sealed override of IsValid(Object) that delegates to the ValidationContext overload so that AsyncValidationAttribute implementations only need to provide a single synchronous fallback via IsValid(Object, ValidationContext).
IsValidAsync(Object, ValidationContext, CancellationToken)	Override this method in subclasses to implement asynchronous validation logic.
Match(Object)	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)
Validate(Object, String)	Validates the specified object. (Inherited from ValidationAttribute)
Validate(Object, ValidationContext)	Validates the specified object. (Inherited from ValidationAttribute)