ValidationAttribute.IsValid Method

Definition

Namespace:

System.ComponentModel.DataAnnotations

Assembly:

System.ComponentModel.Annotations.dll

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)

Source:

ValidationAttribute.cs

Determines whether the specified value of the object is valid.

public:
 virtual bool IsValid(System::Object ^ value);

public virtual bool IsValid (object? value);

abstract member IsValid : obj -> bool
override this.IsValid : obj -> bool

Public Overridable 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

InvalidOperationException

The current attribute is malformed.

NotImplementedException

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)

Source:

ValidationAttribute.cs

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

InvalidOperationException

The current attribute is malformed.

NotImplementedException

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

See also

• ValidationResult