CSharp: Composite Pattern in donet core 3

 

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/// <summary>     ///组合模式 Composite Pattern     /// geovindu,Geovin Du edit     ///     /// </summary>     interface IEmployee     {            /// <summary>         /// To set an employee name         /// 姓名         /// </summary>         string Name { get; set; }           /// <summary>         /// To set an employee department         /// 部门         /// </summary>         string Dept { get; set; }                /// <summary>         /// To set an employee designation         /// 描述         /// </summary>         string Designation { get; set; }             /// <summary>         /// To display an employee details         /// 清单详情         /// </summary>         void DisplayDetails();          // string getToString();       }     /// <summary>     /// Leaf Node     /// </summary>     class Employee : IEmployee     {         /// <summary>         /// 姓名：         /// </summary>         public string Name { get; set; }         /// <summary>         /// 部门         /// </summary>         public string Dept { get; set; }         /// <summary>         /// 描述         /// </summary>         public string Designation { get; set; }         /// <summary>         /// 详情清单 Details of a leaf node         /// </summary>         public void DisplayDetails()         {            // Console.WriteLine($"\t姓名：{Name} 工作在 {Dept} 部门.描述:{Designation}");             Console.WriteLine(getToString());         }         /// <summary>         ///         /// </summary>         /// <returns></returns>             public string getToString()         {             return $"\t姓名：{Name} 工作在 {Dept} 部门.描述:{Designation}";         }     }     /// <summary>     /// 父类 Non-leaf node     /// </summary>     class CompositeEmployee : IEmployee     {           /// <summary>         /// 姓名：         /// </summary>         public string Name { get; set; }         /// <summary>         /// 部门         /// </summary>         public string Dept { get; set; }         /// <summary>         /// 描述         /// </summary>         public string Designation { get; set; }         /// <summary>         ///         /// </summary>         /// <returns></returns>         public string getToString()         {             //return $"{nameof(Name)}: {Name}, {nameof(Dept)}: {Dept}, {nameof(Designation)}: {Designation}";             return $"\t姓名：{Name} 工作在 {Dept} 部门.描述:{Designation}";         }           /// <summary>         /// 子类对象 The container for child objects         /// </summary>         private List<IEmployee> subordinateList = new List<IEmployee>();           /// <summary>         /// 添加 To add an employee         /// </summary>         /// <param name="e"></param>         public void AddEmployee(IEmployee e)         {             subordinateList.Add(e);         }           /// <summary>         /// 移除 To remove an employee         ///         /// </summary>         /// <param name="e"></param>         public void RemoveEmployee(IEmployee e)         {             subordinateList.Remove(e);         }           /// <summary>         /// 详情清单 Details of a composite node         /// </summary>         public void DisplayDetails()         {               //getToString();             //Console.WriteLine($"\n姓名：{Name} 工作在 {Dept} 部门.描述:{Designation}");             Console.WriteLine(getToString());               foreach (IEmployee e in subordinateList)             {                               e.DisplayDetails();             }         }     }

　　

 

 

 

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/// <summary>    ///组合模式 Composite Pattern    /// geovindu,Geovin Du edit    /// </summary>    public class GraphicObject    {          /// <summary>        ///        /// </summary>        public virtual string Name { get; set; } = "组";        /// <summary>        ///        /// </summary>        public string Color;        /// <summary>        ///        /// </summary>        private readonly Lazy<List<GraphicObject>> children          = new Lazy<List<GraphicObject>>();        /// <summary>        ///        /// </summary>        public List<GraphicObject> Children => children.Value;        /// <summary>        ///        /// </summary>        /// <param name="sb"></param>        /// <param name="depth"></param>        private void Print(StringBuilder sb, int depth)        {            sb.Append(new string('*', depth))              .Append(string.IsNullOrWhiteSpace(Color) ? string.Empty : $"{Color} ")              .AppendLine($"{Name}");            foreach (var child in Children)                child.Print(sb, depth + 1);        }        /// <summary>        ///        /// </summary>        /// <returns></returns>        public override string ToString()        {            var sb = new StringBuilder();            Print(sb, 0);            return sb.ToString();        }    }    /// <summary>    ///    /// </summary>    public class Circle : GraphicObject    {        public override string Name => "圆";    }    /// <summary>    ///    /// </summary>    public class Square : GraphicObject    {        public override string Name => "正方形";    }

　　

调用：

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//组合模式            Console.WriteLine("***组合模式Composite Pattern Demo. ***");              #region Mathematics department            //2 lecturers work in Mathematics department            Employee mathTeacher1 = new Employee { Name = "老大", Dept = "数学", Designation = "讲师" };            Employee mathTeacher2 = new Employee { Name = "老二", Dept = "数学", Designation = "讲师" };              //The college has a Head of Department in Mathematics            CompositeEmployee hodMaths = new CompositeEmployee { Name = "老六", Dept = "数学", Designation = "数学系主任" };              //Lecturers of Mathematics directly reports to HOD-Maths            hodMaths.AddEmployee(mathTeacher1);            hodMaths.AddEmployee(mathTeacher2);            #endregion              #region Computer Science department            //3 lecturers work in Computer Sc. department            Employee cseTeacher1 = new Employee { Name = "老三", Dept = "计算机科学", Designation = "讲师" };            Employee cseTeacher2 = new Employee { Name = "老四", Dept = "计算机科学", Designation = "讲师" };            Employee cseTeacher3 = new Employee { Name = "老五", Dept = "计算机科学", Designation = "讲师" };              //The college has a Head of Department in Computer science            CompositeEmployee hodCompSc = new CompositeEmployee { Name = "老幺", Dept = "计算机科学.", Designation = "计算机科学系主任" };              //Lecturers of Computer Sc. directly reports to HOD-CSE            hodCompSc.AddEmployee(cseTeacher1);            hodCompSc.AddEmployee(cseTeacher2);            hodCompSc.AddEmployee(cseTeacher3);            #endregion              #region Top level management            //The college also has a Principal            CompositeEmployee principal = new CompositeEmployee { Name = "族长", Dept = "规划监督管理", Designation = "校长" };              //Head of Departments's of Maths and Computer Science directly reports to Principal.            principal.AddEmployee(hodMaths);            principal.AddEmployee(hodCompSc);            #endregion              /*             * Printing the leaf-nodes and branches in the same way.             * i.e. in each case, we are calling DisplayDetails() method.            */            Console.WriteLine("\nDetails of a Principal(校长) object is as follows:");            //Prints the complete structure            principal.DisplayDetails();              Console.WriteLine("\nDetails of a HOD(系主任） object is as follows:");            //Prints the details of Computer Science department            hodCompSc.DisplayDetails();              //Leaf node            Console.WriteLine("\nDetails of an individual employee(leaf node一般教职员) is as follows:");            mathTeacher1.DisplayDetails();              /*             * Suppose, one Computer Science lecturer(老幺)             * is leaving now from the organization.             */            hodCompSc.RemoveEmployee(cseTeacher2);            Console.WriteLine("\n成员：");            principal.DisplayDetails();                var drawing = new GraphicObject { Name = "我的画" };            drawing.Children.Add(new Square { Color = "红色" });            drawing.Children.Add(new Circle { Color = "黄色" });              var group = new GraphicObject();            group.Children.Add(new Circle { Color = "蓝色" });            group.Children.Add(new Square { Color = "蓝色" });            drawing.Children.Add(group);              Console.WriteLine(drawing);

　　

输出：

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***组合模式Composite Pattern Demo. ***   Details of a Principal(校长) object is as follows:   姓名：族长 工作在 规划监督管理 部门.描述:校长   姓名：老六 工作在 数学 部门.描述:数学系主任         姓名：老大 工作在 数学 部门.描述:讲师         姓名：老二 工作在 数学 部门.描述:讲师   姓名：老幺 工作在 计算机科学. 部门.描述:计算机科学系主任         姓名：老三 工作在 计算机科学 部门.描述:讲师         姓名：老四 工作在 计算机科学 部门.描述:讲师         姓名：老五 工作在 计算机科学 部门.描述:讲师   Details of a HOD(系主任） object is as follows:   姓名：老幺 工作在 计算机科学. 部门.描述:计算机科学系主任         姓名：老三 工作在 计算机科学 部门.描述:讲师         姓名：老四 工作在 计算机科学 部门.描述:讲师         姓名：老五 工作在 计算机科学 部门.描述:讲师   Details of an individual employee(leaf node一般教职员) is as follows:         姓名：老大 工作在 软件 部门.描述:讲师   成员：   姓名：族长 工作在 规划监督管理 部门.描述:校长   姓名：老六 工作在 数学 部门.描述:数学系主任         姓名：老大 工作在 软件 部门.描述:讲师         姓名：老二 工作在 软件 部门.描述:讲师   姓名：老幺 工作在 计算机科学. 部门.描述:计算机科学系主任         姓名：老三 工作在 计算机科学 部门.描述:讲师         姓名：老五 工作在 计算机科学 部门.描述:讲师 我的画 *红色 正方形 *黄色 圆 *组 **蓝色 圆 **蓝色 正方形