IDataLayer Interface

The interface to which data access layers should conform.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v19.2.dll

Declaration

C#

public interface IDataLayer :
    IDisposable,
    IDataLayerProvider,
    IXPDictionaryProvider

VB.NET

Public Interface IDataLayer
    Inherits IDisposable,
             IDataLayerProvider,
             IXPDictionaryProvider

Related API Members

The following members return IDataLayer objects:

• XPObjectSpaceProvider.DataLayer

Related API Members

The following members return IDataLayer objects:

Show 14 links

Library	Related API Members
eXpressApp Framework	XPObjectSpaceProvider.DataLayer
eXpress Persistent Objects	SerializableObjectLayerClient.DataLayer
	Session.DataLayer
	SessionObjectLayer.DataLayer
	SimpleObjectLayer.DataLayer
	XpoDefault.DataLayer
	XpoDefault.GetDataLayer(AutoCreateOption)
	XpoDefault.GetDataLayer(IDbConnection, AutoCreateOption)
	XpoDefault.GetDataLayer(IDbConnection, XPDictionary, AutoCreateOption, out IDisposable[])
	XpoDefault.GetDataLayer(IDbConnection, XPDictionary, AutoCreateOption)
	XpoDefault.GetDataLayer(String, AutoCreateOption)
	XpoDefault.GetDataLayer(String, XPDictionary, AutoCreateOption, out IDisposable[])
	XpoDefault.GetDataLayer(String, XPDictionary, AutoCreateOption)
	XpoDefault.GetDataLayer(XPDictionary, AutoCreateOption)

Related API Members

The following members return IDataLayer objects:

Show 14 links

Library	Related API Members
eXpressApp Framework	XPObjectSpaceProvider.DataLayer
eXpress Persistent Objects	SerializableObjectLayerClient.DataLayer
	Session.DataLayer
	SessionObjectLayer.DataLayer
	SimpleObjectLayer.DataLayer
	XpoDefault.DataLayer
	XpoDefault.GetDataLayer(AutoCreateOption)
	XpoDefault.GetDataLayer(IDbConnection, AutoCreateOption)
	XpoDefault.GetDataLayer(IDbConnection, XPDictionary, AutoCreateOption, out IDisposable[])
	XpoDefault.GetDataLayer(IDbConnection, XPDictionary, AutoCreateOption)
	XpoDefault.GetDataLayer(String, AutoCreateOption)
	XpoDefault.GetDataLayer(String, XPDictionary, AutoCreateOption, out IDisposable[])
	XpoDefault.GetDataLayer(String, XPDictionary, AutoCreateOption)
	XpoDefault.GetDataLayer(XPDictionary, AutoCreateOption)

Remarks

The following classes implement the IDataLayer interface:

• SimpleDataLayer - Used by default.

  Use this DAL if you need to modify the object metadata at runtime.

• ThreadSafeDataLayer

  Use this DAL if multiple threads are allowed to access data in a data store.

Extension Methods

Query<T>()