如何在存储库.Net Web API中使用多个DataContexts(DbContext

// Step 1: 创建多个DbContext类
public class CustomerDbContext : DbContext
{
    public DbSet<Customer> Customers { get; set; }
}

public class OrderDbContext : DbContext
{
    public DbSet<Order> Orders { get; set; }
}

// Step 2: 注册DbContext类
public class Startup
{
    public void Configuration(IAppBuilder app)
    {
        // 注册DbContext类
        var builder = new ContainerBuilder();
        builder.RegisterType<CustomerDbContext>().As<DbContext>().InstancePerRequest();
        builder.RegisterType<OrderDbContext>().As<DbContext>().InstancePerRequest();
        // 注册其他依赖项
        // ...
        var container = builder.Build();
        // 设置依赖解析器
        app.UseAutofacMiddleware(container);
        app.UseAutofacWebApi(GlobalConfiguration.Configuration);
        // 设置Web API路由
        // ...
    }
}

// Step 3: 创建存储库接口和实现类
public interface ICustomerRepository
{
    void AddCustomer(Customer customer);
    // 其他操作方法
}

public class CustomerRepository : ICustomerRepository
{
    private readonly CustomerDbContext _dbContext;

    public CustomerRepository(CustomerDbContext dbContext)
    {
        _dbContext = dbContext;
    }

    public void AddCustomer(Customer customer)
    {
        _dbContext.Customers.Add(customer);
        _dbContext.SaveChanges();
    }
    // 其他操作方法的实现
}

// Step 4: 在存储库实现类中使用DbContext
public interface IOrderRepository
{
    void AddOrder(Order order);
    // 其他操作方法
}

public class OrderRepository : IOrderRepository
{
    private readonly OrderDbContext _dbContext;

    public OrderRepository(OrderDbContext dbContext)
    {
        _dbContext = dbContext;
    }

    public void AddOrder(Order order)
    {
        _dbContext.Orders.Add(order);
        _dbContext.SaveChanges();
    }
    // 其他操作方法的实现
}

// Step 5: 在控制器中使用存储库
public class CustomerController : ApiController
{
    private readonly ICustomerRepository _customerRepository;

    public CustomerController(ICustomerRepository customerRepository)
    {
        _customerRepository = customerRepository;
    }

    [HttpPost]
    public IHttpActionResult AddCustomer(Customer customer)
    {
        _customerRepository.AddCustomer(customer);
        return Ok();
    }
    // 其他操作方法的实现
}