IndexedAttribute.Unique Property

Gets or sets whether the index created by a property or field is a unique one.

Assembly : DevExpress.Xpo.v25.2.dll

Declaration

C#
VB.NET

csharp

public bool Unique { get; set; }

Public Property Unique As Boolean

Property Value

Type	Description
Boolean

true if the index must be unique (no two persistent objects are permitted to have the same index value); otherwise, false.

csharp

public class User : XPObject {
    [Indexed(Unique = true)]
    public int UserId {
        get { return fUserId; }
        set { SetPropertyValue(nameof(UserId), ref fUserId, value); }
    }
    int fUserId;

    public string UserName {
        get { return fUserName; }
        set { SetPropertyValue(nameof(UserName), ref fUserName, value); }
    }
    string fUserName;

}

Public Class User
    Inherits XPObject
    <Indexed(Unique:=True)> _
    Public Property UserId() As Integer
        Get
            Return fUserId
        End Get
        Set(ByVal value as Integer)
            SetPropertyValue(NameOf(UserId), fUserId, value)
        End Set
    End Property
    Private fUserId As Integer

    Public Property UserName() As String
        Get
            Return fUserName
        End Get
        Set(ByVal value as String)
            SetPropertyValue(NameOf(UserName), fUserName, value)
        End Set
    End Property
    Private fUserName As String

End Class