XpoDefault.GetDataLayer(String, XPDictionary, AutoCreateOption, out IDisposable[]) Method

Creates a Data Access Layer.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v19.2.dll

Declaration

C#

public static IDataLayer GetDataLayer(
    string connectionString,
    XPDictionary dictionary,
    AutoCreateOption defaultAutoCreateOption,
    out IDisposable[] objectsToDisposeOnDisconnect
)

VB.NET

Public Shared Function GetDataLayer(
    connectionString As String,
    dictionary As XPDictionary,
    defaultAutoCreateOption As AutoCreateOption,
    ByRef objectsToDisposeOnDisconnect As IDisposable()
) As IDataLayer

Parameters

Name	Type	Description
connectionString	String	A connection string.
dictionary	XPDictionary	A persistent classes metadata provider.
defaultAutoCreateOption	AutoCreateOption	Specifies whether XPO can create a database or update its schema.
objectsToDisposeOnDisconnect	IDisposable[]	An array of IDisposable objects the data store provider creates internally.

Returns

Type	Description
IDataLayer	An IDataLayer object.

Remarks

If the application no longer needs a data layer object, dispose each object on the objectsToDisposeonDisconnect array.

If the value passed to the connectionString parameter is a reference to Data Store Service (URL), the method connects SimpleDataLayer to a Data Store Service client.

The GetDataLayer method throws CannotFindAppropriateConnectionProviderException in the following situations:

A connection string does not contain the XpoProvider attribute and XPO cannot infer the provider name from other attributes.	To get a fully qualified connection string, use the GetConnectionString method of a corresponding connection provider.
A connection string references a Data Store Service and a target platform is .NET Standard or .NET Core.	To connect a .NET Standard/.NET Core project to a Data Store Service, create and configure DataStoreClientAsync or CachedDataStoreClient. For additional information, see WCF Client in .NET Core.

Tip

Dispose of a data layer instance when it is no longer in use to release the resources it holds.