RequiredAttribute Constructor

  • 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
Package:
System.ComponentModel.Annotations v5.0.0
Source:
RequiredAttribute.cs
Source:
RequiredAttribute.cs
Source:
RequiredAttribute.cs

Initializes a new instance of the RequiredAttribute class.

public:
 RequiredAttribute();
public RequiredAttribute ();
Public Sub New ()

Examples

The following example shows how to use the RequiredAttribute constructor. If validation fails, the example displays a validation error message that is provided by Dynamic Data.

// 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

Applies to