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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.v19.1.dll
Declaration
Property Value
| Type | Description |
|---|---|
| IDataLayer | An object which implements the IDataLayer interface; null - in this case, every new session will create and use its own data layer. |
Property Value
| Type | Description |
|---|---|
| IDataLayer | An object which implements the IDataLayer interface; null - in this case, every new session will create and use its own data layer. |
Examples
The following code shows how to create a data layer that will be used by all Session objects by default.
By default the XpoDefault.DataLayer property's value is null. So a new data layer is created for each session when it is connected to a data store. In the 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 provided that their Session.Connection and Session.ConnectionString properties are not initialized.
using DevExpress.Data.DB;
using DevExpress.Xpo;
string forcedConnectionString = ...;
XpoDefault.DataLayer = XpoDefault.GetDataLayer(forcedConnectionString,
AutoCreateOption.DatabaseAndSchema);