XPLiteObject Class

Implements the IXPObject.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v22.1.dll

Declaration

C#

[NonPersistent]
[MemberDesignTimeVisibility(false)]
[OptimisticLocking(false)]
public abstract class XPLiteObject :
    XPBaseObject

VB.NET

<NonPersistent>
<MemberDesignTimeVisibility(False)>
<OptimisticLocking(False)>
Public MustInherit Class XPLiteObject
    Inherits XPBaseObject

Remarks

When declaring a persistent object, you can use the XPLiteObject class as an anscestor for the object if the optimistic concurrency feature is not required. Otherwise, use the XPBaseObject class.

If your persistent class derives from the XPLiteObject class, the OptimisticLockingAttribute isn’t applied. In this instance, you should manually apply this attribute to support optimistic locking. This can be useful when it is needed to map to existing databases.

The following code demonstrates how to declare a persistent object.

C#

using DevExpress.Xpo;
using System.ComponentModel;

// Other base classes: https://docs.devexpress.com/eXpressAppFramework/113146/concepts/business-model-design/business-model-design-with-xpo/base-persistent-classes

public class MyClass : XPLiteObject {
    public MyClass(Session session) : base(session) { }
    // XPLiteObject does not have a built-in key and you need to add your own key
    [Key(AutoGenerate = true), Browsable(false)]
    public int Oid { get; set; }
    string fMyProperty;
    public string MyProperty {
        get { return fMyProperty; }
        set { SetPropertyValue(nameof(MyProperty), ref fMyProperty, value); }
    }
}

VB.NET

Imports System.ComponentModel
Imports DevExpress.Xpo

' Other base classes: https://docs.devexpress.com/eXpressAppFramework/113146/concepts/business-model-design/business-model-design-with-xpo/base-persistent-classes

Public Class [MyClass]
    Inherits XPLiteObject
    Public Sub New(ByVal session As Session)
        MyBase.New(session)
    End Sub
    ' XPLiteObject does not have a built-in key and you need to add your own key
    <Key(AutoGenerate:=True)>
    <Browsable(False)>
    Public Property Oid() As Integer
    Private fMyProperty As String
    Public Property MyProperty() As String
        Get
            Return fMyProperty
        End Get
        Set(ByVal value As String)
            SetPropertyValue(NameOf(MyProperty), fMyProperty, value)
        End Set
    End Property
End Class

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the XPLiteObject class.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

how-to-pre-filter-xpodatasource-assigned-to-aspxgridview-e1341/CS/ServerModeWithParameters/AdventureWorksObjects.cs#L7

[Persistent("Sales.SalesOrderHeader")]
public class OrderHeader : XPLiteObject {
    public OrderHeader(Session session) : base(session) { }

XPO_how-to-get-a-list-of-a-persistent-objects-properties-e725/CS/PersistentObjects.cs#L7

[Persistent("Customers")]
public class Customer : XPLiteObject {
    [Key]

XPO_how-to-implement-odata4-service-with-xpo/CS/ODataService/Models/Customers.cs#L9

[Persistent("Customers")]
public class Customer : XPLiteObject {

XPO_how-to-create-a-filter-with-an-aggregate-function-for-a-child-collection-e1329/CS/PersistentObjects.cs#L8

[Persistent("Customers")]
public class Customer : XPLiteObject {
    public Customer(Session session) : base(session) { }

XPO_how-to-define-a-filter-criterion-whose-parameters-are-supplied-by-editors-e1864/CS/DateRangeFilterViaXpoDataSource/Northwind.cs#L6

[Persistent("Customers")]
public class Customer : XPLiteObject {
    public Customer(Session session) : base(session) { }

VB.NET

how-to-pre-filter-xpodatasource-assigned-to-aspxgridview-e1341/VB/ServerModeWithParameters/AdventureWorksObjects.vb#L9

Public Class OrderHeader
    Inherits XPLiteObject
    Public Sub New(ByVal session As Session)

XPO_how-to-get-a-list-of-a-persistent-objects-properties-e725/VB/PersistentObjects.vb#L9

Public Class Customer
    Inherits XPLiteObject
    <Key> _

XPO_how-to-create-a-filter-with-an-aggregate-function-for-a-child-collection-e1329/VB/PersistentObjects.vb#L9

Public Class Customer
    Inherits XPLiteObject
    Public Sub New(ByVal session As Session)

XPO_how-to-define-a-filter-criterion-whose-parameters-are-supplied-by-editors-e1864/VB/DateRangeFilterViaXpoDataSource/Northwind.vb#L8

Public Class Customer
    Inherits XPLiteObject
    Public Sub New(ByVal session As Session)

XPO_how-to-filter-a-collection-by-an-associated-objects-properties-e886/VB/PersistentObjects.vb#L9

Public Class Customer
    Inherits XPLiteObject
    Public Sub New(ByVal session As Session)

Implements

IXPObject

IXPSimpleObject

ISessionProvider

IXPModificationsStore

Inheritance

Object

PersistentBase

XPBaseObject

XPLiteObject