1配置
1 public void ConfigureServices(IServiceCollection services) 2 { 3 services.AddControllers(); 4 services.AddCors(); 5 6 services.AddDbContext<MyDbContext>(option => 7 { 8 option.UseSqlServer(Configuration.GetConnectionString("connection")); 9 }); 10 11 //<IRepository<>, Repository<>> 12 // 泛型注入 13 services.AddScoped(typeof(IRepository<>), typeof(Repository<>)); 14 // 非泛型注入 15 services.AddScoped<IRepository, Repository>(); 16 17 //注入工作单元 18 services.AddScoped<IunitOfWork, UnitOfWork>(); 19 20 }
1 public class MyDbContext : DbContext 2 { 3 4 public MyDbContext(DbContextOptions<MyDbContext> options) : base(options) 5 { 6 7 } 8 9 protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) 10 { 11 optionsBuilder.Options.Extensions.LastOrDefault(); 12 13 //.UseSqlServer(Configuration.GetConnectionString("connection") 14 //optionsBuilder.UseSqlServer("Data Source=blog.db"); 15 } 16 17 /// <summary> 18 /// OnModelCreating 19 /// </summary> 20 /// <param name="modelBuilder"></param> 21 protected override void OnModelCreating(ModelBuilder modelBuilder) 22 { 23 base.OnModelCreating(modelBuilder); 24 } 25 26 public DbSet<MessageMode> MessageMode { get; set; } 27 28 }
2.第一种实现
接口
1 public interface IRepository 2 { 3 4 IEnumerable<T> GetConditions<T>(Func<T, bool> predicate = null) where T : class; 5 6 T Get<T>(Func<T, bool> predicate) where T : class; 7 8 T Get<T>(params object[] keyValues) where T : class; 9 10 void Add<T>(T entity); 11 12 void AddRange<T>(List<T> entitys); 13 14 void Update<T>(T entity); 15 16 void Delete<T>(T entity); 17 18 void Delete<T>(List<T> entitys); 19 20 }
实现
1 public class Repository : IRepository 2 { 3 4 private MyDbContext dbContext; 5 6 /// <summary> 7 /// 构造函数注入 8 /// </summary> 9 /// <param name="_dbContext"></param> 10 public Repository(MyDbContext _dbContext) 11 { 12 dbContext = _dbContext; 13 } 14 15 public void Add<T>(T entity) 16 { 17 dbContext.Add(entity); 18 } 19 20 public void AddRange<T>(List<T> entitys) 21 { 22 dbContext.AddRange(entitys); 23 } 24 25 public void Update<T>(T entity) 26 { 27 dbContext.Update(entity); 28 } 29 30 public void Delete<T>(T entity) 31 { 32 dbContext.Remove(entity); 33 } 34 35 public void Delete<T>(List<T> entitys) 36 { 37 dbContext.RemoveRange(entitys); 38 } 39 40 public T Get<T>(Func<T, bool> predicate) where T : class 41 { 42 return dbContext.Set<T>().Where(predicate).FirstOrDefault(); 43 } 44 45 public T Get<T>(params object[] keyValues) where T : class 46 { 47 return dbContext.Find<T>(keyValues); 48 } 49 50 public IEnumerable<T> GetConditions<T>(Func<T, bool> predicate = null) where T : class 51 { 52 if (predicate == null) 53 { 54 return dbContext.Set<T>().Where(l => true); 55 } 56 return dbContext.Set<T>().Where(predicate); 57 } 58 }
3.第二种实现
接口
public interface IRepository<T> where T : class
{
IEnumerable<T> GetConditions(Func<T, bool> predicate = null);
T Get(Func<T, bool> predicate);
T Get(params object[] keyValues);
void Add(T entity);
void AddRange(List<T> entitys);
void Update(T entity);
void Delete(T entity);
void Delete(List<T> entitys);
}
实现
public class Repository<T> : IRepository<T> where T : class
{
private MyDbContext dbContext ;
public MyDbContext Context => dbContext;
/// <summary>
/// 构造函数注入
/// </summary>
/// <param name="_dbContext"></param>
public Repository(MyDbContext _dbContext)
{
dbContext = _dbContext;
}
public void Add(T entity)
{
dbContext.Add(entity);
}
public void AddRange(List<T> entitys)
{
dbContext.AddRange(entitys);
}
public void Update(T entity)
{
dbContext.Update(entity);
}
public void Delete(T entity)
{
//dbContext.Add(entity).State = EntityState.Deleted;
dbContext.Remove(entity);
}
public void Delete(List<T> entitys)
{
//dbContext.Add(entity).State = EntityState.Deleted;
dbContext.RemoveRange(entitys);
}
public T Get(Func<T, bool> predicate)
{
return dbContext.Set<T>().Where(predicate).FirstOrDefault();
}
public T Get(params object[] keyValues)
{
return dbContext.Find<T>(keyValues);
}
public IEnumerable<T> GetConditions(Func<T, bool> predicate = null)
{
if (predicate == null)
{
return dbContext.Set<T>().Where(l=>true);
}
return dbContext.Set<T>().Where(predicate);
}
}
工作单元
接口
public interface IunitOfWork { void Commit(); }
实现
public class UnitOfWork : IunitOfWork { private MyDbContext _dbContext; public UnitOfWork(MyDbContext dbContext) { _dbContext = dbContext; } public void Commit() { _dbContext.SaveChanges(); } }
最终再给一个使用的例子,
[ApiController] [Route("[controller]")] public class WeatherForecastController : ControllerBase { private readonly ILogger<WeatherForecastController> _logger; private readonly IRepository<MessageMode> _userRepository; private readonly IRepository _repository; private readonly IunitOfWork _IunitOfWork; public WeatherForecastController(ILogger<WeatherForecastController> logger, IRepository<MessageMode> userRepository, IRepository repository, IunitOfWork IunitOfWork) { _logger = logger; _userRepository = userRepository; _repository = repository; _IunitOfWork = IunitOfWork; } [HttpGet] public IEnumerable<MessageDto> Get() { return _repository.GetConditions<MessageMode>().Adapt<List<MessageDto>>(); } [HttpPost] public IActionResult Post(MessageDto messageDto) { var model = messageDto.Adapt<MessageMode>(); _repository.Add<MessageMode>(model); _IunitOfWork.Commit(); return Ok("ok"); } }