ValidationAttribute.IsValid Method

Definition

Checks whether the specified object is valid.

Overloads

IsValid(Object)

Determines whether the specified value of the object is valid.

IsValid(Object, ValidationContext)

Validates the specified value with respect to the current validation attribute.

IsValid(Object)

Determines whether the specified value of the object is valid.

public:
 virtual bool IsValid(System::Object ^ value);
public:
 abstract bool IsValid(System::Object ^ value);
public virtual bool IsValid (object value);
public abstract bool IsValid (object value);
abstract member IsValid : obj -> bool
override this.IsValid : obj -> bool
abstract member IsValid : obj -> bool
Public Overridable Function IsValid (value As Object) As Boolean
Public MustOverride Function IsValid (value As Object) As Boolean

Parameters

value
Object

The value of the object to validate.

Returns

Boolean

true if the specified value is valid; otherwise, false.

Exceptions

The current attribute is malformed.

Neither overload of IsValid has been implemented by a derived class.

Remarks

If you inherit from the ValidationAttribute class, you must implement the validation logic in this method.

IsValid(Object, ValidationContext)

Validates the specified value with respect to the current validation attribute.

protected:
 virtual System::ComponentModel::DataAnnotations::ValidationResult ^ IsValid(System::Object ^ value, System::ComponentModel::DataAnnotations::ValidationContext ^ validationContext);
protected virtual System.ComponentModel.DataAnnotations.ValidationResult IsValid (object value, System.ComponentModel.DataAnnotations.ValidationContext validationContext);
abstract member IsValid : obj * System.ComponentModel.DataAnnotations.ValidationContext -> System.ComponentModel.DataAnnotations.ValidationResult
override this.IsValid : obj * System.ComponentModel.DataAnnotations.ValidationContext -> System.ComponentModel.DataAnnotations.ValidationResult
Protected Overridable Function IsValid (value As Object, validationContext As ValidationContext) As ValidationResult

Parameters

value
Object

The value to validate.

validationContext
ValidationContext

The context information about the validation operation.

Returns

ValidationResult

An instance of the ValidationResult class.

Exceptions

The current attribute is malformed.

IsValid(Object, ValidationContext) has not been implemented by a derived class.

See also

Applies to