从零开始写C# MVC框架之--- 服务接口与实现-蒲公英云

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;
        }
    }
}