RequiredAttribute.IsValid(Object) Method

Reference

Definition

Namespace:: System.ComponentModel.DataAnnotations

Assembly:: System.ComponentModel.Annotations.dll

Assemblies:: System.ComponentModel.Annotations.dll, System.ComponentModel.DataAnnotations.dll

Assembly:: System.ComponentModel.DataAnnotations.dll

Source:: RequiredAttribute.cs

Source:: RequiredAttribute.cs

Source:: RequiredAttribute.cs

Important

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Checks that the value of the required data field is not empty.

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

public override bool IsValid (object value);

public override bool IsValid (object? value);

override this.IsValid : obj -> bool

Public Overrides Function IsValid (value As Object) As Boolean

Parameters

value: Object

The data field value to validate.

Returns

Boolean

true if validation is successful; otherwise, false.

Exceptions

ValidationException

The data field value was null.

Remarks

If the value is an empty string, the method returns false and a validation error is displayed.

Applies to