C# NET内核。如何使用n层体系结构?
我想在ASP.NET核心WebApi项目中使用n层体系结构。我在DAL层(类库项目)中定义了一些具有接口的存储库。然后,我尝试通过使用IServiceCollection以这种方式注入它:C# NET内核。如何使用n层体系结构?,c#,asp.net,asp.net-core,C#,Asp.net,Asp.net Core,我想在ASP.NET核心WebApi项目中使用n层体系结构。我在DAL层(类库项目)中定义了一些具有接口的存储库。然后,我尝试通过使用IServiceCollection以这种方式注入它: public void ConfigureServices(IServiceCollection services) { // Add framework services. services.AddMvc();
public void ConfigureServices(IServiceCollection services)
{
// Add framework services.
services.AddMvc();
services.AddScoped<IUsersRepository, UsersRepository>();
}
public void配置服务(IServiceCollection服务)
{
//添加框架服务。
services.AddMvc();
services.addScope();
}
但这是无法解决的。我做错了什么?配置您的Startup.cs:
public void ConfigureServices(IServiceCollection services) {
...
services.AddSingleton<ISessionFactory>(c => {
var config = new Configuration();
...
return config.BuildSessionFactory();
});
...
services.AddSingleton<RoleServico>();
...
}
public void配置服务(IServiceCollection服务){
...
services.AddSingleton(c=>{
var config=新配置();
...
返回config.BuildSessionFactory();
});
...
services.AddSingleton();
...
}
然后,在API控制器中使用如下方法:
[Route("api/role")]
public class RoleController : Controller {
private readonly ISessionFactory SessionFactory;
private readonly RoleServico RoleServico;
public RoleController(ISessionFactory sessionFactory, RoleServico roleServico) {
if (sessionFactory == null)
throw new ArgumentNullException("sessionFactory");
SessionFactory = sessionFactory;
this.RoleServico = roleServico;
}
[HttpGet]
public IList<RoleModel> Get() {
IList<RoleModel> model = new List<RoleModel>();
using (var session = SessionFactory.OpenSession())
using (var transaction = session.BeginTransaction()) {
return RoleServico.SelecionarRoles(session);
}
}
}
[路由(“api/角色”)]
公共类角色控制器:控制器{
私有只读ISessionFactory SessionFactory;
私人只读RoleServico RoleServico;
公共角色控制器(ISessionFactory sessionFactory、RoleServico RoleServico){
if(sessionFactory==null)
抛出新的ArgumentNullException(“sessionFactory”);
SessionFactory=SessionFactory;
this.RoleServico=RoleServico;
}
[HttpGet]
公共IList Get(){
IList模型=新列表();
使用(var session=SessionFactory.OpenSession())
使用(var transaction=session.BeginTransaction()){
返回RoleServico.SelecionarRoles(会话);
}
}
}
你的Startup.cs看起来不错,但我不知道你是如何使用你的注入类的,或者,如果你收到一些错误消息
“RoleServico”是类库项目中的一个类(与您的案例类似)。在我的例子中,我使用了“Singleton”,但“Scoped”的配置是相同的
*我无法评论您的问题并询问更多信息(我还没有50%的声誉)。配置您的Startup.cs:
public void ConfigureServices(IServiceCollection services) {
...
services.AddSingleton<ISessionFactory>(c => {
var config = new Configuration();
...
return config.BuildSessionFactory();
});
...
services.AddSingleton<RoleServico>();
...
}
public void配置服务(IServiceCollection服务){
...
services.AddSingleton(c=>{
var config=新配置();
...
返回config.BuildSessionFactory();
});
...
services.AddSingleton();
...
}
然后,在API控制器中使用如下方法:
[Route("api/role")]
public class RoleController : Controller {
private readonly ISessionFactory SessionFactory;
private readonly RoleServico RoleServico;
public RoleController(ISessionFactory sessionFactory, RoleServico roleServico) {
if (sessionFactory == null)
throw new ArgumentNullException("sessionFactory");
SessionFactory = sessionFactory;
this.RoleServico = roleServico;
}
[HttpGet]
public IList<RoleModel> Get() {
IList<RoleModel> model = new List<RoleModel>();
using (var session = SessionFactory.OpenSession())
using (var transaction = session.BeginTransaction()) {
return RoleServico.SelecionarRoles(session);
}
}
}
[路由(“api/角色”)]
公共类角色控制器:控制器{
私有只读ISessionFactory SessionFactory;
私人只读RoleServico RoleServico;
公共角色控制器(ISessionFactory sessionFactory、RoleServico RoleServico){
if(sessionFactory==null)
抛出新的ArgumentNullException(“sessionFactory”);
SessionFactory=SessionFactory;
this.RoleServico=RoleServico;
}
[HttpGet]
公共IList Get(){
IList模型=新列表();
使用(var session=SessionFactory.OpenSession())
使用(var transaction=session.BeginTransaction()){
返回RoleServico.SelecionarRoles(会话);
}
}
}
你的Startup.cs看起来不错,但我不知道你是如何使用你的注入类的,或者,如果你收到一些错误消息
“RoleServico”是类库项目中的一个类(与您的案例类似)。在我的例子中,我使用了“Singleton”,但“Scoped”的配置是相同的
*我无法评论您的问题并询问更多信息(我还没有50个声誉)。1\u创建一个
类库,以OA.DataLayer的名称命名
在Nuget中下载Microsoft.EntityFrameworkCore.SqlServer
在数据层中创建模型示例Tbl\u Student
为DataContext的名称创建一个类
,并将此代码复制到类中
public class DataContext:DbContext
{
public DataContext(DbContextOptions<DataContext> options):base(options)
{
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
}
public virtual DbSet<Tbl_Student> Tbl_Students { get; set; }
}
3\u创建一个类库到OA.Rep的名称
在Nuget中下载Microsoft.EntityFrameworkCore.SqlServer
创建一个class
到存储库名称复制此代码
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
5_转到您的项目添加appsetting.json
并复制此代码
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
将此代码添加到启动
IConfiguration configuration;
将此代码添加到方法ConfigureServices
services.AddDbContext<DataContext>(options => options.UseSqlServer(configuration.GetConnectionString("DefaultConnection")));
将此代码添加到构造函数中
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
要执行操作
请编写此代码
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
公共异步任务索引()
{
var q=等待学生.GetByIdAsync(1);
返回视图();
}
1\为OA.DataLayer的名称创建一个类库
在Nuget中下载Microsoft.EntityFrameworkCore.SqlServer
在数据层中创建模型示例Tbl\u Student
为DataContext的名称创建一个类
,并将此代码复制到类中
public class DataContext:DbContext
{
public DataContext(DbContextOptions<DataContext> options):base(options)
{
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
}
public virtual DbSet<Tbl_Student> Tbl_Students { get; set; }
}
3\u创建一个类库到OA.Rep的名称
在Nuget中下载Microsoft.EntityFrameworkCore.SqlServer
创建一个class
到存储库名称复制此代码
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
5_转到您的项目添加appsetting.json
并复制此代码
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
将此代码添加到启动
IConfiguration configuration;
将此代码添加到方法ConfigureServices
services.AddDbContext<DataContext>(options => options.UseSqlServer(configuration.GetConnectionString("DefaultConnection")));
将此代码添加到构造函数中
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
要执行操作
请编写此代码
public interface IRepository<T> where T : class
{
Task<T> GetByIdAsync(int id);
IQueryable<T> GetAll();
void Remove(T entity);
void Add(T entity);
void Update(T entity);
Task<int> SaveChangeAsync();
}
public class Repository<T> : IRepository<T> where T : class
{
DataContext context;
DbSet<T> db;
public Repository(DataContext context)
{
this.context = context;
db = context.Set<T>();
}
public void Add(T entity)
{
db.Add(entity);
}
public IQueryable<T> GetAll()
{
return db;
}
public async Task<T> GetByIdAsync(int id)
{
return await Task<T>.Run(() =>
{
return db.FindAsync(1);
});
}
public void Remove(T entity)
{
db.Remove(entity);
}
public async Task<int> SaveChangeAsync()
{
return await Task<T>.Run(() =>
{
return context.SaveChangesAsync();
});
}
public void Update(T entity)
{
context.Entry<T>(entity).State = EntityState.Modified;
}
}
{
"ConnectionStrings": {
"DefaultConnection": "Data Source=.;Initial Catalog=dh;Integrated Security=True;"
}
}
DataContext context;
Student student;
public HomeController(DataContext context)
{
this.context = context;
student = new Student(context);
}
public async Task<IActionResult> Index()
{
var q = await student.GetByIdAsync(1);
return View();
}
公共异步任务索引()
{
var q=等待学生.GetByIdAsync(1);
返回视图();
}
您的用户订阅本身是否需要依赖项,而该依赖项尚未注册?您应该能够得到一条错误消息,帮助您指出这一点。@MikeD,此回购协议中没有新内容。我以前创建过很多次它,和以前一样,我希望Repo实例应该用DI容器注入控制器。通常Repo采用dbContext类型的对象,您确定您的Repo在其自己的构造函数中没有任何参数吗?@MikeD,绝对-只有空的实体。是否有错误消息?您的UsersRepo本身是否需要依赖项,并且该依赖项尚未注册?你应该能做到