CSharp: Proxy Pattern in donet.core 6.0

 

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using System; using System.Collections.Generic; using System.Data; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Geovin.Du.DuProxy.DuProtectionProxy {       /// <summary>     /// 代理模式 Proxy  Pattern     /// </summary>     public class Employee     {           /// <summary>         ///         /// </summary>         /// <param name="username"></param>         /// <param name="password"></param>         /// <param name="role"></param>         public Employee(string username, string password, Role role)         {             Username = username;             Password = password;             Role = role;         }         /// <summary>         /// 账户/用户名         /// </summary>         public string Username { get; set; }         /// <summary>         /// 密码         /// </summary>         public string Password { get; set; }         /// <summary>         /// 角色         /// </summary>         public Role Role { get; set; }     } }   using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Geovin.Du.DuProxy.DuProtectionProxy {     /// <summary>     /// 代理模式 Proxy  Pattern     /// 角色     /// </summary>     public enum Role     {         /// <summary>         /// 工作人员         /// </summary>         Worker,         /// <summary>         /// 管理者         /// </summary>         Manager,         /// <summary>         /// 高层         /// </summary>         CEO,     }   }     using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Geovin.Du.DuProxy.DuProtectionProxy {       /// <summary>     /// 代理模式 Proxy  Pattern     /// </summary>     public interface ISharedFolder     {         /// <summary>         ///         /// </summary>         void Access();     }   }     using Geovin.Du.DuProxy.DuProtectionProxy; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Geovin.Du.DuProxy.DuProtectionProxy {     /// <summary>     /// 代理模式 Proxy  Pattern     /// </summary>     public class SharedFolder : ISharedFolder     {         /// <summary>         ///         /// </summary>         public void Access() => Console.WriteLine("打开共享文件夹.");     }   }   using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Geovin.Du.DuProxy.DuProtectionProxy {     /// <summary>     ///     /// </summary>     public class SharedFolderProxy : ISharedFolder     {           /// <summary>         /// 代理模式 Proxy  Pattern         /// </summary>         private readonly Employee _employee;         /// <summary>         ///         /// </summary>         private readonly SharedFolder _sharedFolder;         /// <summary>         ///         /// </summary>         /// <param name="employee"></param>         /// <param name="sharedFolder"></param>         public SharedFolderProxy(Employee employee, SharedFolder sharedFolder)         {             _employee = employee;             _sharedFolder = sharedFolder;         }         /// <summary>         /// 权限 管理者和高层         /// </summary>         public void Access()         {             if (_employee.Role is Role.Manager or Role.CEO)             {                 _sharedFolder.Access();                 return;             }               Console.WriteLine($"具有该角色的员工 '{_employee.Role}' 没有访问共享文件夹的权限");         }     } }   using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Geovin.Du.BuildingBlocks;     namespace Geovin.Du.DuProxy.DuProtectionProxy {     /// <summary>     /// 代理模式 Proxy  Pattern     /// </summary>     public static class ProtectionProxyExecutor     {           /// <summary>         ///         /// </summary>         public static void Execute()         {             ConsoleExtension.WriteSeparator("代理模式 Protection proxy pattern demo");               TryToAccessTheSharedFolder("GeovinDu", "password", Role.Worker);             TryToAccessTheSharedFolder("GeovinTu", "password", Role.CEO);         }         /// <summary>         ///         /// </summary>         /// <param name="username"></param>         /// <param name="password"></param>         /// <param name="role"></param>         private static void TryToAccessTheSharedFolder(string username, string password, Role role)         {             Console.WriteLine(                 $"\n使用用户名： '{username}'和角色： '{role}' " +                 $"正在尝试访问共享文件夹...");               var employee = new Employee(username, password, role);             var sharedFolder = new SharedFolder();             var folderProxy = new SharedFolderProxy(employee, sharedFolder);               folderProxy.Access();         }     } }

　　

调用：

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Geovin.Du.DuProxy.DuProtectionProxy.ProtectionProxyExecutor.Execute();   Console.WriteLine();

　　

输出：

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Hello, Geovin Du! 学习 .net 6   代理模式 Protection proxy pattern demo --------------------------------------------------   使用用户名： 'GeovinDu'和角色： 'Worker' 正在尝试访问共享文件夹... 具有该角色的员工 'Worker' 没有访问共享文件夹的权限   使用用户名： 'GeovinTu'和角色： 'CEO' 正在尝试访问共享文件夹... 打开共享文件夹.