RequiredAttribute Konstruktor

Definisi

Ruang nama:

System.ComponentModel.DataAnnotations

Rakitan:

System.ComponentModel.Annotations.dll

Sumber:

RequiredAttribute.cs

Menginisialisasi instans baru kelas RequiredAttribute.

public:
 RequiredAttribute();

public RequiredAttribute ();

Public Sub New ()

Contoh

Contoh berikut menunjukkan cara menggunakan RequiredAttribute konstruktor. Jika validasi gagal, contoh menampilkan pesan kesalahan validasi yang disediakan oleh Data Dinamis.

// Require that the MiddleName is not null.
// Use standard validation error.
[Required()]
public object MiddleName;

' Require that the MiddleName is not null.
' Use standard validation error.
<Required()> _
Public MiddleName As Object