[外包]!採用asp.net core 快速構建小型創業公司後臺管理系統(一)

[外包]!採用asp.net core 快速構建小型創業公司後臺管理系統(一) ...

今天給大家分享一下採用asp.net core 快速構建小型創業公司後臺管理系統，該項目是我給一個朋友做的，將要用到公司項目，今天分享出來許可權管理模塊喜歡的朋友可以試用用一下。

項目不是一個什麼新項目，也沒有用到什麼牛逼的東西，但裡面融入了我用asp.net core構建管理系統的思考，可以說是思想的結合體。

該項目的許可權模塊我已經放到了Liinu上，項目預覽地址：http://xingchenbeta.52expo.top/Welcome 賬戶：admin 密碼：123456

接下來再說一下該項目基本點：

項目採用Asp.Net Core2.1+EF Core構建後臺服務
項目前端使用BootStrap+Angular1.x構建管理系統前端
資料庫採用MySql 5.7.24
部署環境在CentOS 7.4上
項目中用到Redis
用到Quartz

接下來在上一張項目圖片：

項目基本完成功能點有：

角色管理（curd）
角色授權
後臺用戶管理（crud）
代碼動態生成許可權

廢話就說這麼多吧，接下來我就從頭開始介紹這個項目。

一.項目基本組成介紹

項目成員就這麼多，大家看著名字可能很眼熟，其實我只接用了DDD的名字而已。

除去單元測試，項目分為五部分：API,WebSite,Domain,Infrastuctrue,Applicaiton

Api 主要用來給我們的移動端兄弟們提供api支持

Website裡面呢就是我們的後臺管理系統

Domain裡面我放的是資料庫實體模型，識圖模型，枚舉類，服務介面約束，以及必要的核心東西

Infrastructure裡面我放著部分Domain介面的實現，資料庫上下文，三方，工具類，一些拓展方法，等基礎構造

Application裡面放著Domain介面的實現，這裡我主要放自己需要寫的服務，也可以稱之為業務邏輯

二.抽絲剝繭，看看具體怎麼實現

1，設計好資料庫（我們還是採用db frist的思想，因為我覺得code frist開發的有點慢，並不是說code frist不好！），在Domain項目引入支持mysql的nuget包

<PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="2.1.2" />

　　生成實體類

## dbfrist 資料庫遷移命令

Scaffold-DbContext "Server=host;Database=RestApi;User=root;Password=xx.;" "Pomelo.EntityFrameworkCore.MySql" -Force -OutputDir Entitys

　　如圖

　　把context從實體中拉出來，放到infrastructure里，在Infrastructure里創建context文件夾

2. 在Domain 創建Repositorys文件夾

　　IDbRepository封裝裝ef數據倉儲介面

/// <summary>
    /// 封裝裝ef數據倉儲介面
    /// </summary>
    public interface IDbRepository<TContext> where TContext:dbcontext
    {
        /// <summary>
        /// get <see cref="!:TSource" /> from raw sql query
        /// the TSource must in database or <see cref="T:Microsoft.EntityFrameworkCore.DbContext" />
        /// </summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="sql"></param>
        /// <param name="parameters"></param>
        /// <returns></returns>
        IQueryable<TSource> FromSql<TSource>(string sql, params object[] parameters) where TSource : class;

        /// <summary>get single or default TSource</summary>
        /// <typeparam name="TSource">entity</typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        TSource Single<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class;

        /// <summary>get first or default TSource</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        TSource First<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class;

        /// <summary>select entity by conditions</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        IQueryable<TSource> Where<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class;

        /// <summary>counting the entity's count under this condition</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        int Count<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class;

        /// <summary>return the query</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <returns></returns>
        IQueryable<TSource> Query<TSource>() where TSource : class;

        /// <summary>check the condition</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        bool Exists<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class;

        /// <summary>paging the query</summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="query"></param>
        /// <param name="pageIndex">page index</param>
        /// <param name="pageSize">page size </param>
        /// <param name="count">total row record count</param>
        /// <returns></returns>
        IQueryable<T> Pages<T>(IQueryable<T> query, int pageIndex, int pageSize, out int count) where T : class;

        /// <summary>paging the query</summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="pageIndex">page index</param>
        /// <param name="pageSize">page size </param>
        /// <param name="count">total row record count</param>
        /// <returns></returns>
        IQueryable<T> Pages<T>(int pageIndex, int pageSize, out int count) where T : class;

        /// <summary>
        /// 分頁
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="query"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <param name="count">總條數</param>
        /// <param name="pageCount">頁數</param>
        /// <returns></returns>
        IQueryable<T> Pages<T>(IQueryable<T> query, int pageIndex, int pageSize, out int count, out int pageCount) where T : class;
        /// <summary>save all the changes add, update, delete</summary>
        void Save();

        /// <summary>add entity to context or database</summary>
        /// <param name="entity"></param>
        /// <param name="save">save the add and all changes before this to database</param>
        void Add(object entity, bool save = false);

        /// <summary>update entity to context or database</summary>
        /// <param name="entity"></param>
        /// <param name="save">save the update and all changes before this to database</param>
        void Update(object entity, bool save = false);

        /// <summary>update entitys to context or database</summary>
        /// <param name="list"></param>
        /// <param name="save">save the updates and all changes before this to database</param>
        void Update(IEnumerable<object> list, bool save = false);

        /// <summary>delete entity from context or database</summary>
        /// <param name="entity"></param>
        /// <param name="save">save the delete and all changes before this to database</param>
        void Delete(object entity, bool save = false);

        /// <summary>delete entitys from context or database</summary>
        /// <param name="list"></param>
        /// <param name="save">save the deletes and all changes before this to database</param>
        void Delete(IEnumerable<object> list, bool save = false);
    }

　　在Infrastructure里創建Repositorys,DbRepository類實現了IDbRepository,封裝泛型倉儲依賴介面 DbContext約束

/// <summary>
    /// 封裝泛型倉儲 依賴介面 DbContext約束
    /// </summary>
    /// <typeparam name="TContext"></typeparam>
    public class DbRepository<TContext> : IDbRepository where TContext : DbContext
    {
        private TContext _context;

        protected virtual TContext DataContext
        {
            get
            {
                if ((object)this._context == null)
                    this._context = ServiceCollectionExtension.New<TContext>();
                return this._context;
            }
        }

        /// <summary>
        /// get <see cref="!:TSource" /> from raw sql query
        /// the TSource must in database or <see cref="T:Microsoft.EntityFrameworkCore.DbContext" />
        /// </summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="sql"></param>
        /// <param name="parameters"></param>
        /// <returns></returns>
        public IQueryable<TSource> FromSql<TSource>(string sql, params object[] parameters) where TSource : class
        {
            return this.DataContext.Set<TSource>().FromSql<TSource>((RawSqlString)sql, parameters);
        }

        /// <summary>get single or default TSource</summary>
        /// <typeparam name="TSource">entity</typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        public TSource Single<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class
        {
            if (predicate == null)
                return this.DataContext.Set<TSource>().SingleOrDefault<TSource>();
            return this.DataContext.Set<TSource>().SingleOrDefault<TSource>(predicate);
        }

        /// <summary>get first or default TSource</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        public TSource First<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class
        {
            if (predicate == null)
                return this.DataContext.Set<TSource>().FirstOrDefault<TSource>();
            return this.DataContext.Set<TSource>().FirstOrDefault<TSource>(predicate);
        }

        /// <summary>select entity by conditions</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        public IQueryable<TSource> Where<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class
        {
            if (predicate == null)
                return this.DataContext.Set<TSource>().AsQueryable<TSource>();
            return this.DataContext.Set<TSource>().Where<TSource>(predicate);
        }

        /// <summary>counting the entity's count under this condition</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        public int Count<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class
        {
            if (predicate == null)
                return this.DataContext.Set<TSource>().Count<TSource>();
            return this.DataContext.Set<TSource>().Count<TSource>(predicate);
        }

        /// <summary>return the query</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <returns></returns>
        public IQueryable<TSource> Query<TSource>() where TSource : class
        {
            return (IQueryable<TSource>)this.DataContext.Set<TSource>();
        }

        /// <summary>check the condition</summary>
        /// <typeparam name="TSource"></typeparam>
        /// <param name="predicate"></param>
        /// <returns></returns>
        public bool Exists<TSource>(Expression<Func<TSource, bool>> predicate = null) where TSource : class
        {
            if (predicate == null)
                return this.DataContext.Set<TSource>().Any<TSource>();
            return this.DataContext.Set<TSource>().Any<TSource>(predicate);
        }

        /// <summary>paging the query</summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="query"></param>
        /// <param name="pageIndex">page index</param>
        /// <param name="pageSize">page size </param>
        /// <param name="count">total row record count</param>
        /// <returns></returns>
        public IQueryable<T> Pages<T>(IQueryable<T> query, int pageIndex, int pageSize, out int count) where T : class
        {
            if (pageIndex < 1)
                pageIndex = 1;
            if (pageSize < 1)
                pageSize = 10;
            count = query.Count<T>();
            query = query.Skip<T>((pageIndex - 1) * pageSize).Take<T>(pageSize);
            return query;
        }

        /// <summary>paging the query</summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="pageIndex">page index</param>
        /// <param name="pageSize">page size </param>
        /// <param name="count">total row record count</param>
        /// <returns></returns>
        public IQueryable<T> Pages<T>(int pageIndex, int pageSize, out int count) where T : class
        {
            if (pageIndex < 1)
                pageIndex = 1;
            if (pageSize < 1)
                pageSize = 10;
            var source = this.DataContext.Set<T>().AsQueryable<T>();
            count = source.Count<T>();
            return source.Skip<T>((pageIndex - 1) * pageSize).Take<T>(pageSize);
        }
        /// <summary>
        /// 分頁
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="query"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <param name="count"></param>
        /// <param name="pageCount"></param>
        /// <returns></returns>
        public IQueryable<T> Pages<T>(IQueryable<T> query, int pageIndex, int pageSize, out int count, out int pageCount) where T : class
        {
            if (pageIndex < 1)
            {
                pageIndex = 1;
            }
            if (pageSize < 1)
            {
                pageSize = 10;
            }
            if (pageSize > 100)
            {
                pageSize = 100;
            }
            count = query.Count();
            pageCount = count / pageSize;
            if ((decimal)pageCount < (decimal)count / (decimal)pageSize)
            {
                pageCount++;
            }
            query = query.Skip((pageIndex - 1) * pageSize).Take(pageSize);
            return query;
        }


        /// <summary>save all the changes add, update, delete</summary>
        public void Save()
        {
            this.DataContext.SaveChanges();
        }

        /// <summary>add entity to context or database</summary>
        /// <param name="entity"></param>
        /// <param name="save">save the add and all changes before this to database</param>
        public void Add(object entity, bool save = false)
        {
            this.DataContext.Add(entity);
            if (!save)
                return;
            this.Save();
        }

        /// <summary>update entity to context or database</summary>
        /// <param name="entity"></param>
        /// <param name="save">save the update and all changes before this to database</param>
        public void Update(object entity, bool save = false)
        {
            this.DataContext.Update(entity);
            if (!save)
                return;
            this.Save();
        }

        /// <summary>update entitys to context or database</summary>
        /// <param name="list"></param>
        /// <param name="save">save the updates and all changes before this to database</param>
        public void Update(IEnumerable<object> list, bool save = false)
        {
            this.DataContext.UpdateRange(list);
            if (!save)
                return;
            this.Save();
        }

        /// <summary>delete entity from context or database</summary>
        /// <param name="entity"></param>
        /// <param name="save">save the delete and all changes before this to database</param>
        public void Delete(object entity, bool save = false)
        {
            this.DataContext.Remove(entity);
            if (!save)
                return;
            this.Save();
        }

        /// <summary>delete entitys from context or database</summary>
        /// <param name="list"></param>
        /// <param name="save">save the deletes and all changes before this to database</param>
        public void Delete(IEnumerable<object> list, bool save = false)
        {
            this.DataContext.RemoveRange(list);
            if (!save)
                return;
            this.Save();
        }
    }

View Code

　　需要註意的地方我說一下

public class DbRepository<TContext> : IDbRepository<TContext> where TContext : DbContext
    {
        private TContext _context;

        protected virtual TContext DataContext
        {
            get
            {
                if ((object)this._context == null)
                    this._context = ServiceCollectionExtension.New<TContext>();
                return this._context;
            }
        }
}

　　ServiceCollectionExtension.New<TContext>()是我寫的一個服務拓展，可以創建出一個TContext類型的實體，當然我們可以把這個DbRepository放到Application
　　這樣Repository這塊東西就只是Domain和Application通過介面之間的約束了

　　3.簡要說一下ServiceCollectionExtension里的東西

　　這個拓展我寫到了Infrastructure里，主要用來做服務註冊用的，他非常重要非常重要非常重要，代碼我這裡分享一下。

public static class ServiceCollectionExtension
    {
        private static IHttpContextAccessor _httpContextAccessor;

        private static IServiceProvider _serviceProvider;
        /// <summary>
        /// cerf weige
        /// </summary>
        private static IDataProtector Protector => ServiceProvider.GetDataProtector("AspNetCore", Array.Empty<string>());


        /// <summary>
        /// 註冊常用服務
        /// </summary>
        /// <param name="service"></param>
        public static IServiceCollection AddRegisterContainer(this IServiceCollection services)
        {
            //註入httpContextAccessor
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            //註入配置文件獲取服務
            services.AddSingleton<IConfigGeter, ConfigGeter>();
            return services;
        }

        //
        /// <summary>
        /// 創建自定義AddMvc
        /// </summary>
        /// <param name="services"></param>
        /// <param name="mvcOptions"></param>
        /// <returns></returns>
        public static IMvcBuilder AddMvcCustomer(this IServiceCollection services, Action<MvcApplicationOptions> mvcOptions = null)
        {
            ServiceCollectionDescriptorExtensions.Replace(services, ServiceDescriptor.Singleton<IFilterProvider, MvcFilterProvider>());

            var result= services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1).AddJsonOptions(_mvcJsonOptions =>
            {
                _mvcJsonOptions.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
                _mvcJsonOptions.SerializerSettings.DateFormatString = "yyyy-MM-d HH:mm";
                _mvcJsonOptions.SerializerSettings.DateTimeZoneHandling = DateTimeZoneHandling.Local;
                _mvcJsonOptions.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                _mvcJsonOptions.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
            });

            services.AddAuthentication(options => options.AddScheme<MvcCookieAuthenticationHandler>(TbConstant.WEBSITE_AUTHENTICATION_SCHEME, TbConstant.WEBSITE_AUTHENTICATION_SCHEME));
            
            services.BuildServiceProvider().RegisterServiceProvider();
            return result;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="services"></param>
        /// <returns></returns>
        public static IServiceCollection AddAuthorizedFilter<T>(this IServiceCollection services) where T : class, IAuthorizationFilter
        {
            services.AddTransient<IAuthorizationFilter, T>();
            return services;
        }
        /// <summary>
        /// 創建服務提供者
        /// </summary>
        /// <param name="serviceProvider"></param>
        /// <returns></returns>
        public static IServiceProvider RegisterServiceProvider(this IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider ?? throw new MvcException("IServiceProvider serviceProvider canot be null");
            _httpContextAccessor = serviceProvider.GetRequiredService<IHttpContextAccessor>();
            return serviceProvider;
        }

        /// <summary>
        /// 
        /// </summary>
        public static IServiceProvider ServiceProvider
        {
            get
            {
                if (_serviceProvider == null)
                {
                    return _httpContextAccessor.HttpContext.RequestServices;
                }
                return _serviceProvider;//_httpContextAccessor.HttpContext.RequestServices;
            }
        }

        public static HttpContext HttpContext => _httpContextAccessor?.HttpContext;


        public static object New(Type type)
        {
            return ActivatorUtilities.CreateInstance(ServiceProvider, type, Array.Empty<object>());
        }

        public static T New<T>()
        {
            return ActivatorUtilities.CreateInstance<T>(ServiceProvider, Array.Empty<object>());
        }

        public static T Get<T>()
        {
            T val;
            try
            {
                val = ActivatorUtilities.GetServiceOrCreateInstance<T>(ServiceProvider);
            }
            catch (Exception ex)
            {
                try
                {
                    val = ServiceProvider.GetService<T>();
                }
                catch (Exception ex2)
                {
                    try
                    {
                        val = default(T);
                    }
                    catch (Exception ex3)
                    {
                        throw new MvcException($"ex0={ex.Message}; ex1={ex2.Message}; ex2={ex3.Message};");
                    }
                }
            }
            if (val != null)
            {
                return val;
            }
            return default(T);
        }

        public static object Get(Type type)
        {
            try