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 程式師世界 >> 編程語言 >> .NET網頁編程 >> C# >> C#入門知識 >> 領域Command,command

領域Command,command

編輯:C#入門知識

領域Command,command


一、項目文件

 

二、代碼

1     /// <summary>
2     /// 
3     /// </summary>
4     public interface ICommand
5     {
6     }
 1     /// <summary>
 2     /// 
 3     /// </summary>
 4     public interface ICommandResult
 5     {
 6         bool Success { get; }
 7         int? ReturnKey { get; }
 8 
 9         string ReturnKeys { get; }
10 
11     }
1     /// <summary>
2     /// 
3     /// </summary>
4     /// <typeparam name="TCommand"></typeparam>
5     public interface ICommandHandler<in TCommand> where TCommand : ICommand
6     {
7         ICommandResult Execute(TCommand command);
8     }
1     /// <summary>
2     /// 
3     /// </summary>
4     /// <typeparam name="TCommand"></typeparam>
5     public interface IValidationHandler<in TCommand> where TCommand : ICommand
6     {
7         IEnumerable<ValidationResult> Validate(TCommand command);
8     }
 1     /// <summary>
 2     /// 
 3     /// </summary>
 4     public class CommandResult : ICommandResult
 5     {
 6         public CommandResult(bool success, int? returnkey = null, string returnKeys = null)
 7         {
 8             this.Success = success;
 9             this.ReturnKey = returnkey;
10             this.ReturnKeys = returnKeys;
11         }
12 
13         public bool Success { get; protected set; }
14 
15         public int? ReturnKey { get; protected set; }
16 
17         public string ReturnKeys { get; protected set; }
18 
19     }
 1     /// <summary>
 2     /// 
 3     /// </summary>
 4     public class CommandHandlerNotFoundException : Exception
 5     {
 6         public CommandHandlerNotFoundException(Type type)
 7             : base(string.Format("Command handler not found for command type: {0}", type))
 8         {
 9         }
10     }
 1     /// <summary>
 2     /// 
 3     /// </summary>
 4     public class ValidationHandlerNotFoundException : Exception
 5     {
 6         public ValidationHandlerNotFoundException(Type type)
 7             : base(string.Format("Validation handler not found for command type: {0}", type))
 8         {
 9         }
10     }
1     /// <summary>
2     /// 
3     /// </summary>
4     public interface ICommandBus
5     {
6         ICommandResult Submit<TCommand>(TCommand command) where TCommand : ICommand;
7         IEnumerable<ValidationResult> Validate<TCommand>(TCommand command) where TCommand : ICommand;
8     }
 1     /// <summary>
 2     /// 
 3     /// </summary>
 4     public class DefaultCommandBus : ICommandBus
 5     {
 6         public ICommandResult Submit<TCommand>(TCommand command) where TCommand : ICommand
 7         {
 8             var handler = (ICommandHandler<TCommand>)DependencyDefaultInstanceResolver.GetInstance(typeof(ICommandHandler<TCommand>));
 9             if (!((handler != null) && handler is ICommandHandler<TCommand>))
10             {
11                 throw new CommandHandlerNotFoundException(typeof(TCommand));
12             }   
13             return handler.Execute(command);
14         }
15 
16         public IEnumerable<ValidationResult> Validate<TCommand>(TCommand command) where TCommand : ICommand
17         {
18             var handler = (IValidationHandler<TCommand>)DependencyDefaultInstanceResolver.GetInstance(typeof(IValidationHandler<TCommand>));
19             if (!((handler != null) && handler is IValidationHandler<TCommand>))
20             {
21                 throw new ValidationHandlerNotFoundException(typeof(TCommand));
22             }
23             return handler.Validate(command);
24         }
25 
26     }

 

 1     /// <summary>
 2     /// Describes the result of a validation of a potential change through a business service.
 3     /// </summary>
 4     public class ValidationResult
 5     {
 6 
 7         /// <summary>
 8         /// Initializes a new instance of the <see cref="ValidationResult"/> class.
 9         /// </summary>
10         public ValidationResult()
11         {
12         }
13 
14         /// <summary>
15         /// Initializes a new instance of the <see cref="ValidationResult"/> class.
16         /// </summary>
17         /// <param name="memeberName">Name of the memeber.</param>
18         /// <param name="message">The message.</param>
19         public ValidationResult(string memeberName, string message)
20         {
21             this.MemberName = memeberName;
22             this.Message = message;
23         }
24 
25         /// <summary>
26         /// Initializes a new instance of the <see cref="ValidationResult"/> class.
27         /// </summary>
28         /// <param name="message">The message.</param>
29         public ValidationResult(string message)
30         {
31             this.Message = message;
32         }
33 
34         /// <summary>
35         /// Gets or sets the name of the member.
36         /// </summary>
37         /// <value>
38         /// The name of the member.  May be null for general validation issues.
39         /// </value>
40         public string MemberName { get; set; }
41 
42         /// <summary>
43         /// Gets or sets the message.
44         /// </summary>
45         /// <value>
46         /// The message.
47         /// </value>
48         public string Message { get; set; }
49 
50     }

 

三、使用示例

注冊

1             builder.RegisterType<DefaultCommandBus>().As<ICommandBus>().InstancePerLifetimeScope();
2 
3             var domainCommands = Assembly.Load("Frozen.DomainCommands");
4             builder.RegisterAssemblyTypes(domainCommands)
5                 .AsClosedTypesOf(typeof(ICommandHandler<>)).InstancePerLifetimeScope();
6             builder.RegisterAssemblyTypes(domainCommands)
7                 .AsClosedTypesOf(typeof(IValidationHandler<>)).InstancePerLifetimeScope();

定義Command

 1     /// <summary>
 2     /// Command 刪除學生
 3     /// </summary>
 4     public class DeleteStudentCommand : ICommand
 5     {
 6         /// <summary>
 7         /// 學生Id
 8         /// </summary>
 9         public int StuId { get; set; }
10 
11     }

定義Handler

 1     /// <summary>
 2     /// 
 3     /// </summary>
 4     public class DeleteStudentHandler : ICommandHandler<DeleteStudentCommand>
 5     {
 6         private readonly IStuEducationRepo _iStuEducationRepo;
 7 
 8         public DeleteStudentHandler(IStuEducationRepo iStuEducationRepo)
 9         {
10             this._iStuEducationRepo = iStuEducationRepo;
11         }
12 
13         public ICommandResult Execute(DeleteStudentCommand command)
14         {
15 
16 
17             return new CommandResult(true);
18         }
19 
20     }

調用

1             var command = new DeleteStudentCommand()
2             {
3                 StuId = 1
4             };
5             var result = _commandBus.Submit(command);

結果:

 

已打包成附件

http://files.cnblogs.com/files/frozenzhang/Frozen.DomainCommands.zip

 

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