Summarize practical applications of reflection technology.

The use of reflection has been summarized before. This article combines a complete project to summarize the practical application of reflection.

Project structure

As shown below:

Define the plug-in interface

In the project ConsoleApplication6 In .IService, two interfaces are defined. Run represents driving and Trun represents steering. The following code:

 1 namespace ConsoleApplication6.IService 2 { 3     /// <summary> 4     /// 创建一个车的接口 5     /// </summary> 6     public interface ICarService 7     { 8         /// <summary> 9         /// 行驶10         /// </summary>11         void Run();12 13         /// <summary>14         /// 转向15         /// </summary>16         /// <param name="direction"></param>17         void Turn(Direction direction);18 19     }20 21     public enum Direction22     {23         East,24         Weast,25         South,26         North27     }28 }

Plug-in implementation

Two new projects have been created here to implement plug-ins, namely ConsoleApplication6.Service.BMW and ConsoleApplication6.Service.BenZ. The codes are as follows:

 1 namespace ConsoleApplication6.Service.BMW 2 { 3     public class BMWCarService: ICarService 4     { 5         /// <summary> 6         /// 行驶 7         /// </summary> 8         public void Run() 9         {10             Console.WriteLine("BMW Car Run!");11         }12 13         /// <summary>14         /// 转向15         /// </summary>16         /// <param name="direction"></param>17         public void Turn(Direction direction)18         {19             Console.WriteLine(string.Format("BMW Car turn:{0}", direction.ToString()));20         }21     }22 }

 1 namespace ConsoleApplication6.Service.BenZ 2 { 3     public class BenZCarService: ICarService 4     { 5         /// <summary> 6         /// 行驶 7         /// </summary> 8         public void Run() 9         {10             Console.WriteLine("BenZ Car Run!");11         }12 13         /// <summary>14         /// 转向15         /// </summary>16         /// <param name="direction"></param>17         public void Turn(Direction direction)18         {19             Console.WriteLine(string.Format("BenZ Car turn:{0}", direction.ToString()));20         }21     }22 }

Run the program

Next we can use reflection to run the plug-in program, as follows:

 1 namespace ConsoleApplication6 2 { 3     class Program 4     { 5         static void Main(string[] args) 6         { 7             var assembly = Assembly.Load("ConsoleApplication6.Service.BMW");//也可以从配置文件中读取 8             var t = assembly.GetType("ConsoleApplication6.Service.BMW.BMWCarService");//也可以从配置文件中读取 9 10             //创建一辆车的实例11             var obj = Activator.CreateInstance(t);12             ICarService car = obj as BMWCarService;13             if (car != null)14             {15                 car.Run();16                 car.Turn(Direction.East);17             }18 19             Console.ReadKey();20         }21     }22 }

In this way, a simple plug-in program is completed. At the same time, if we develop a similar plug-in framework, reflection technology will be used extensively.

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