全链路运营管理系统架构设计指南：数据层、业务层、应用层逻辑拆解

// 运营订单实体类示例
public class OperationOrder
{
    public int Id { get; set; }
    public string OrderNumber { get; set; }
    public DateTime CreateTime { get; set; }
    public OrderStatus Status { get; set; }
    public decimal Amount { get; set; }
    
    // 导航属性
    public virtual ICollection Items { get; set; }
}

// 订单状态枚举
public enum OrderStatus
{
    Pending = 1,
    Processing = 2,
    Completed = 3,
    Cancelled = 4
}

// 订单领域服务示例
public class OrderService
{
    private readonly IOrderRepository _orderRepository;
    
    public OrderService(IOrderRepository orderRepository)
    {
        _orderRepository = orderRepository;
    }
    
    // 创建订单业务逻辑
    public async Task CreateOrderAsync(OrderCreateDto createDto)
    {
        // 参数验证
        if (createDto.Items == null || !createDto.Items.Any())
            return OperationResult.Failed("订单项目不能为空");
        
        // 业务规则校验
        if (createDto.TotalAmount <= 0)
            return OperationResult.Failed("订单金额必须大于0");
        
        // 创建订单实体
        var order = new OperationOrder
        {
            OrderNumber = GenerateOrderNumber(),
            CreateTime = DateTime.Now,
            Status = OrderStatus.Pending,
            Amount = createDto.TotalAmount
        };
        
        // 持久化操作
        await _orderRepository.AddAsync(order);
        await _orderRepository.SaveChangesAsync();
        
        return OperationResult.Success(order.Id);
    }
    
    private string GenerateOrderNumber()
    {
        return $"ORD{DateTime.Now:yyyyMMddHHmmssfff}";
    }
}

// API控制器示例
[ApiController]
[Route("api/v1/[controller]")]
public class OrdersController : ControllerBase
{
    private readonly OrderService _orderService;
    
    public OrdersController(OrderService orderService)
    {
        _orderService = orderService;
    }
    
    [HttpPost]
    public async Task CreateOrder([FromBody] OrderCreateDto createDto)
    {
        var result = await _orderService.CreateOrderAsync(createDto);
        
        if (!result.Success)
            return BadRequest(new { message = result.Message });
        
        return Ok(new { orderId = result.Data });
    }
    
    [HttpGet("{id}")]
    public async Task GetOrder(int id)
    {
        var order = await _orderService.GetOrderByIdAsync(id);
        if (order == null)
            return NotFound();
        
        return Ok(order);
    }
}