从零开始写C# MVC框架之--- 服务接口与实现

阳光穿透心脏的1/2处 2022-09-25 15:15 290阅读 0赞

服务层，设计时添加了接口与实现，而面向接口编程也是好处多多。来上图看服务层结构

![Center][]

Zy.Xn.IServices是接口，Zy.Xn.Services是接口的实现，在对应的项目下建立了System文件夹，系统框架的方法放在此文件夹下，所有接口服务需要继承 IService 类（依赖注入释放资源），在Zy.Xn.Service的实现类中需要继承 ServiceBase 类（提供EF context上下文）

在项目中很大的好处是，不需要知道具体业务，在页面设计未出前，就能直接开发 增、删、改方法，缩短整体开发时间

描述完它们的作用后，上一段用户接口与服务的代码：

IUserService：

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using Zy.Utility.Core;
    using Zy.Xn.Model.System;
    
    namespace Zy.Xn.IServices
    {
        public interface IUserService : IService
        {
            /// <summary>
            /// 创建用户
            /// </summary>
            /// <param name="user"></param>
            /// <returns>用户Id</returns>
            int CreateUser(User user);
    
            /// <summary>
            /// 修改用户
            /// </summary>
            /// <param name="user"></param>
            void UpdateUser(User user);
    
            /// <summary>
            /// 删除用户
            /// </summary>
            /// <param name="id"></param>
            void DeleteUser(int id);
    
            /// <summary>
            /// 获取用户
            /// </summary>
            /// <param name="id"></param>
            /// <returns></returns>
            User GetUser(int id);
    
            /// <summary>
            /// 获取用户
            /// </summary>
            /// <param name="loginUserName"></param>
            /// <returns></returns>
            User GetUser(string loginUserName);
    
            /// <summary>
            /// 获取组织机构下的用户
            /// </summary>
            /// <param name="deptId"></param>
            /// <returns></returns>
            IEnumerable<User> GetUsers(int deptId);
    
            /// <summary>
            /// 获取组织机构下的用户列表
            /// </summary>
            /// <param name="query"></param>
            /// <returns></returns>
            PageModel<User> GetPageUsers(UserQuery query);
        }
    }

UserService：

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using Zy.Utility.Core;
    using Zy.Xn.IServices;
    using Zy.Xn.Model.System;
    
    namespace Zy.Xn.Services
    {
        public class UserService : ServiceBase, IUserService
        {
    
            /// <summary>
            /// 创建用户
            /// </summary>
            /// <param name="user"></param>
            public int CreateUser(User user)
            {
                user.LoginEncryptKey = "key";
                user.IsDel = false;
                user.CreateTime = DateTime.Now;
                context.Users.Add(user);
                context.SaveChanges();
                return user.Id;
            }
    
            /// <summary>
            /// 修改用户
            /// </summary>
            /// <param name="user"></param>
            public void UpdateUser(User user)
            {
                var userModel = context.Users.FirstOrDefault(item => item.Id == user.Id);
                if (userModel != null)
                {
                    userModel.UserName = user.UserName;
                    userModel.UserNumber = user.UserNumber;
                    userModel.LoginUserName = user.LoginUserName;
                    userModel.LoginPassword = user.LoginPassword;
                    userModel.LoginEncryptKey = user.LoginEncryptKey;
                    userModel.Sex = user.Sex;
                    userModel.State = user.State;
                    userModel.SortIndex = user.SortIndex;
                    context.SaveChanges();
                }
            }
    
            /// <summary>
            /// 删除用户
            /// </summary>
            /// <param name="id"></param>
            public void DeleteUser(int id)
            {
                var user = context.Users.FirstOrDefault(item => item.Id == id);
                if (user != null)
                {
                    //user.IsDel = true;
                    context.Users.Remove(user);
                    context.SaveChanges();
    
                    //删除用户角色信息
                    var roleUsers = context.RoleUsers.Where(item => item.UserId == id).ToArray();
                    context.RoleUsers.RemoveRange(roleUsers);
                    context.SaveChanges();
                }
            }
    
            /// <summary>
            /// 获取用户
            /// </summary>
            /// <param name="id"></param>
            /// <returns></returns>
            public User GetUser(int id)
            {
                return context.Users.FirstOrDefault(item => item.Id == id);
            }
    
            /// <summary>
            /// 获取用户
            /// </summary>
            /// <param name="userName"></param>
            /// <returns></returns>
            public User GetUser(string loginUserName)
            {
                return context.Users.FirstOrDefault(item => item.LoginUserName == loginUserName);
            }
    
    
            /// <summary>
            /// 获取组织机构下的用户
            /// </summary>
            /// <param name="deptId"></param>
            /// <returns></returns>
            public IEnumerable<User> GetUsers(int deptId)
            {
                return context.Users.Where(item => item.DeptId == deptId).ToArray();
            }
    
            /// <summary>
            /// 获取组织机构下的用户列表
            /// </summary>
            /// <param name="query"></param>
            /// <returns></returns>
            public PageModel<User> GetPageUsers(UserQuery query)
            {
                var users = context.Users.Where(item => item.DeptId == query.DeptId && item.IsDel == false);
                if (!string.IsNullOrWhiteSpace(query.UserName))
                {
                    users = users.Where(item => item.UserName.Contains(query.UserName));
                }
                if (!string.IsNullOrWhiteSpace(query.Sex))
                {
                    var sex = (User.UserSexs)Convert.ToInt32(query.Sex);
                    users = users.Where(item => item.Sex == sex);
                }
                if (!string.IsNullOrWhiteSpace(query.State))
                {
                    var state = (User.UserStates)Convert.ToInt32(query.State);
                    users = users.Where(item => item.State == state);
                }
    
                int total = users.Count();
                users = users.OrderByDescending(item => item.Id).Skip(query.PageSize * (query.PageNo - 1)).Take(query.PageSize);
                var page = new PageModel<User>()
                {
                    Total = total,
                    Data = users.ToArray()
                };
                return page;
            }
        }
    }

注意：以上只是编写了接口和实现，那怎样在控制器中调用接口，接口自动调用实现方法获取结果呢，这就需要用到autofac依赖注入了，不对之处欢迎指正，谢谢

[Center]: /images/20220717/b073569ecedf44e78e7026384ed87844.png