SimpleDataLayer(IDataStore) Constructor

Initializes a new instance of the SimpleDataLayer class with a specified data store provider and default metadata information.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v24.1.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public SimpleDataLayer(
    IDataStore provider
)

VB.NET

Public Sub New(
    provider As IDataStore
)

Parameters

Name	Type	Description
provider	IDataStore	A IDataStore object which implements data store-specific functionality.

Remarks

The default metadata is obtained via the XpoDefault.GetDictionary method.

Example

This example demonstrates how to store persistent objects in RAM.

To use RAM as a data store, a InMemoryDataStore object is created and passed to the SimpleDataLayer object constructor. The created SimpleDataLayer object is assigned to the XpoDefault.DataLayer property and will be used by any Session object when a connection to a data store is to be established.

C#

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

XpoDefault.DataLayer = new SimpleDataLayer(new InMemoryDataStore());

VB.NET

Imports DevExpress.Xpo
Imports DevExpress.Xpo.DB

XpoDefault.DataLayer = New SimpleDataLayer(New InMemoryDataStore())