.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+

XpoDefault.DataLayer Property

Gets or sets the default data access layer which is used by Session objects by default, to access a data store.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v20.2.dll


public static IDataLayer DataLayer { get; set; }
Public Shared Property DataLayer As IDataLayer

Property Value

Type Description

An object which implements the IDataLayer interface; null - in this case, every new session will create and use its own data layer.


This example demonstrates how to create a data layer that will be used by all Session objects.

The XpoDefault.DataLayer property's value is null by default. XPO creates a new data layer for each session when the session is connected to a data store.

In this example, a data layer (represented by the SimpleDataLayer class object) is created and assigned to the XpoDefault.DataLayer property using the XpoDefault.GetDataLayer method.

In this case, newly created sessions will use this data layer. The sessions' Session.Connection and Session.ConnectionString properties are not initialized.

using DevExpress.Data.DB;
using DevExpress.Xpo;

string forcedConnectionString = ...;
XpoDefault.DataLayer = XpoDefault.GetDataLayer(forcedConnectionString, 
See Also