SecuredEFCoreObjectSpaceProvider<TDbContext> Class

Provides an Object Space in EF Core-based applications that use the Security System.

Namespace: DevExpress.EntityFrameworkCore.Security

Assembly: DevExpress.EntityFrameworkCore.Security.v26.1.dll

NuGet Package: DevExpress.ExpressApp.EFCore

Declaration

C#

public class SecuredEFCoreObjectSpaceProvider<TDbContext> :
    EFCoreObjectSpaceProvider<TDbContext>,
    INonsecuredObjectSpaceProvider
    where TDbContext : DbContext

VB.NET

Public Class SecuredEFCoreObjectSpaceProvider(Of TDbContext As DbContext)
    Inherits EFCoreObjectSpaceProvider(Of TDbContext)
    Implements INonsecuredObjectSpaceProvider

Type Parameters

Name	Description
TDbContext	The database provider

Remarks

XAF uses an Object Space Provider to create Object Spaces. The following Object Space Provider types are included in XAF:

Object Space Provider	Object Space	Application Builder Method
EFCoreObjectSpaceProvider<TDbContext>	EFCoreObjectSpace	AddEFCore
XPObjectSpaceProvider	XPObjectSpace	AddXpo
SecuredEFCoreObjectSpaceProvider<TDbContext>	SecuredEFCoreObjectSpace	AddSecuredEFCore
SecuredObjectSpaceProvider	SecuredXPObjectSpace	AddSecuredXpo
NonPersistentObjectSpaceProvider	NonPersistentObjectSpace	AddNonPersistent

XAF applications configure Object Space Providers through the Application Builder’s ObjectSpaceProviders properties: IBlazorApplicationBuilder.ObjectSpaceProviders and IWinApplicationBuilder.ObjectSpaceProviders. When you create an application with the Template Kit, it registers Object Space Providers for the selected preset.

Refer to the following topic for instructions on how to add custom Object Space Providers to your application: Custom Object Space Provider.

Note

When multiple Object Space Providers are registered in the application, the ModuleUpdater.UpdateDatabaseAfterUpdateSchema method is executed multiple times, once for each registered Provider. In this method, before accessing an object of a particular type, check if the current Object Space supports this type using the IObjectSpace.CanInstantiate method.

The following example demonstrates how to create the SecuredEFCoreObjectSpaceProvider in a non-XAF application.

C#

using DevExpress.EntityFrameworkCore.Security;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Security;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl.EF.PermissionPolicy;
using Microsoft.EntityFrameworkCore;
using System.Configuration;
// ...
class Program {
    static void Main() {
        AuthenticationStandard authentication = new AuthenticationStandard();
        SecurityStrategyComplex security = new SecurityStrategyComplex(
            typeof(PermissionPolicyUser), typeof(PermissionPolicyRole),
            authentication
        );
        var objectSpaceProvider = new SecuredEFCoreObjectSpaceProvider<ApplicationDbContext>(security,
            XafTypesInfo.Instance, ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString,
            (builder, connectionString) => builder.UseConnectionString(connectionString)
        );
        // ...
    }
}

You can find the full example in the following GitHub repository: How to use the Integrated mode of the Security System in non-XAF applications (EF Core).

Implements

IObjectSpaceProvider

INonsecuredObjectSpaceProvider

Inheritance

Object

EFCoreObjectSpaceProvider<TDbContext>

SecuredEFCoreObjectSpaceProvider<TDbContext>