ASP .NET CORE 1.1.1依赖注入错误-Java 学习之路

我是Asp .Net Core的新手，我使用它创建了App . 我在我的项目中使用通用存储库 . 但我有一个错误：

尝试激活“ECommerce.Repository.ProductRepository”时，无法解析“Microsoft.EntityFrameworkCore.DbContext”类型的服务 .

BaseRepository

protected DbContext _dbContext;
    protected readonly DbSet<T> _dbSet;

    public BaseRepository(DbContext dbContext)
    {
        _dbContext = dbContext;
        _dbSet = dbContext.Set<T>();
    }

Repository

public partial class ProductRepository : BaseRepository<Product>, IProductRepository
{
    public ProductRepository(DbContext dbContext) : base(dbContext) { }
}

Service

public partial class ProductService : BaseService<Product>, IProductService
{
    private readonly IProductRepository _repository;
    private readonly IProductValidation _validation;
    private readonly IUnitOfWork _unitOfWork;
    public ProductService(IProductValidation validation, IProductRepository respository, IUnitOfWork unitOfWork)
        : base(validation, respository, unitOfWork)
    {
        _repository = respository;
        _validation = validation;
        _unitOfWork = unitOfWork;
    }
}

Validation

public partial class ProductValidation : BaseValidation<Product>, IProductValidation
{
    private readonly IProductRepository _productRepository;

    public ProductValidation(IProductRepository productRepository) : base(productRepository)
    {
    }
}

Startup

public void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<ECommerceDbContext>(options =>
           options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
        // Add framework services.
        services.AddMvc();


        services.AddTransient<IUnitOfWork, UnitOfWork>();
        services.AddTransient<IProductRepository, ProductRepository>();
        services.AddTransient<IProductService, ProductService>();
        services.AddTransient<IProductValidation, ProductValidation>();
    }

Controller

private readonly IProductService _productService;

    public ValuesController(IProductService productService)
    {
        _productService = productService;
    }
    // GET api/values
    [HttpGet]
    public IEnumerable<Product> Get()
    {
        return _productService.GetAll();
    }

请告诉我我的代码有什么问题 . 非常感谢

P / s：这个代码在我之前使用Autofac使用Asp .Net 4.6的项目中非常完美

2 回答

0
根据您对其他答案的评论：

如果您确定应用程序中只有 ONE DbContext ，您可以这样做
```
services.AddScoped<DbContext, ECommerceDbContext>();
```
要么
```
services.AddScoped<DbContext>(provider => provider.GetRequiredService<ECommerceDbContext>());
```
如果你不希望 DbContext 和 ECommerceDbContext 解析为两个不同的实例
回复于 2024-04-28T11:53:10+08:00
2
您需要注入实际的DbContext类，在本例中为 ECommerceDbContext .

所以将构造函数更改为：
```
public BaseRepository(ECommerceDbContext dbContext)
{
    _dbContext = dbContext;
    _dbSet = dbContext.Set<T>();
}
```
回复于 2024-04-28T11:53:10+08:00

ASP .NET CORE 1.1.1依赖注入错误

2 回答

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