上接

基础类建立好后，下一步就要创建对基础类进行操作的类了，也就是实现基础类的增删改查（听起来不太高大上），当然，为了使用asp.net5的认证机制，这些都是通过特定的接口来实现的。

比如，对于角色来说，角色管理要实现的接口如下：

1     public interface IQueryableRoleStore
     
       : IRoleStore
      
       , IDisposable where TRole : class2     {3 4         IQueryable
       
         Roles { get; }5     }
       
      
     

1     public interface IRoleStore
     
       : IDisposable where TRole : class 2     { 3  4         Task
      
        CreateAsync(TRole role, CancellationToken cancellationToken); 5         Task
       
         DeleteAsync(TRole role, CancellationToken cancellationToken); 6         Task
        
          FindByIdAsync(string roleId, CancellationToken cancellationToken); 7         Task
         
           FindByNameAsync(string normalizedRoleName, CancellationToken cancellationToken); 8         Task
          
            GetNormalizedRoleNameAsync(TRole role, CancellationToken cancellationToken); 9 Task
           
             GetRoleIdAsync(TRole role, CancellationToken cancellationToken);10 Task
            
              GetRoleNameAsync(TRole role, CancellationToken cancellationToken);11 Task SetNormalizedRoleNameAsync(TRole role, string normalizedName, CancellationToken cancellationToken);12 Task SetRoleNameAsync(TRole role, string roleName, CancellationToken cancellationToken);13 Task
             
               UpdateAsync(TRole role, CancellationToken cancellationToken);14 }
             
            
           
          
         
        
       
      
     

其实，也没什么复杂，一个是获得所有预定义角色的列表，另一个是关于角色的增删改查而已,代码如下：

1 public class HDRoleStore
     
       : IQueryableRoleStore
      
         2         where TRole : HDRole, new()  3     {  4         /// 
       
  5         /// 存储所有预定义的角色  6         /// 
  7         private readonly Dictionary
       
         _roles = new Dictionary
        
         ();  8   9         /// 
         
 10         /// 所有角色 11         /// 
 12         public IQueryable
         
           Roles 13         { 14             get 15             { 16                 if (_roles.Count == 0) 17                 { 18                     TRole role = new TRole(); 19                     role.Id = "admin"; 20                     role.Name = "管理员"; 21                     _roles.Add(role.Id, role); 22  23                     role = new TRole(); 24                     role.Id = "user"; 25                     role.Name = "用户"; 26                     _roles.Add(role.Id, role); 27  28                     role = new TRole(); 29                     role.Id = "power"; 30                     role.Name = "大虾"; 31                     _roles.Add(role.Id, role); 32                 } 33                 return _roles.Values.AsQueryable(); 34             } 35         } 36  37         public Task
          
            CreateAsync(TRole role, CancellationToken cancellationToken) 38 { 39 _roles[role.Id] = role; 40 return Task.FromResult(IdentityResult.Success); 41 } 42 43 public Task
           
             DeleteAsync(TRole role, CancellationToken cancellationToken) 44 { 45 if (role == null || !_roles.ContainsKey(role.Id)) 46 { 47 throw new InvalidOperationException("Unknown role"); 48 } 49 _roles.Remove(role.Id); 50 return Task.FromResult(IdentityResult.Success); 51 } 52 53 public void Dispose() 54 { 55 56 } 57 58 public Task
            
              FindByIdAsync(string roleId, CancellationToken cancellationToken) 59 { 60 if (_roles.ContainsKey(roleId)) 61 { 62 return Task.FromResult(_roles[roleId]); 63 } 64 return Task.FromResult
             
              (null); 65 } 66 67 public Task
              
                FindByNameAsync(string normalizedRoleName, CancellationToken cancellationToken) 68 { 69 return 70 Task.FromResult( 71 Roles.SingleOrDefault(r => String.Equals(r.Name, normalizedRoleName, StringComparison.OrdinalIgnoreCase))); 72 } 73 74 public Task
               
                 GetNormalizedRoleNameAsync(TRole role, CancellationToken cancellationToken) 75 { 76 return Task.FromResult(role.Name); 77 } 78 79 public Task
                
                  GetRoleIdAsync(TRole role, CancellationToken cancellationToken) 80 { 81 return Task.FromResult(role.Id); 82 } 83 84 public Task
                 
                   GetRoleNameAsync(TRole role, CancellationToken cancellationToken) 85 { 86 return Task.FromResult(role.Name); 87 } 88 89 public Task SetNormalizedRoleNameAsync(TRole role, string normalizedName, CancellationToken cancellationToken) 90 { 91 role.Name = normalizedName; 92 return Task.FromResult(0); 93 } 94 95 public Task SetRoleNameAsync(TRole role, string roleName, CancellationToken cancellationToken) 96 { 97 role.Name = roleName; 98 return Task.FromResult(0); 99 }100 101 public Task
                  
                    UpdateAsync(TRole role, CancellationToken cancellationToken)102 {103 _roles[role.Id] = role;104 return Task.FromResult(IdentityResult.Success);105 }106 }
                  
                 
                
               
              
             
            
           
          
         
        
       
      
     

可以看到，在第12行，我们的方法里直接写死了角色列表，如果相结合具体的项目的话，我相信叶良辰有一百种方法从各种数据库、配置文件等取得角色列表，而其他程序代码却基本不用更改。

当然，asp.net5自带的默认实现实现了很多其他接口，这里为了最简单起见，只实现了最基本的。

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