使用反射動態建立類的執行個體

 

   public interface IWriter
    {
        void Write();
    }
    
    public class LogWriter:IWriter
    {
        public static int typeID;


        IWriter Members#region IWriter Members

        public void Write()
        {
        //    throw new Exception("The method or operation is not implemented.");
            Console.WriteLine(typeID);
        }

        #endregion
    }

 

 

  Assembly assembly = Assembly.GetExecutingAssembly();
            Module[] modules = assembly.GetModules();
            if (modules != null)
            {                   
                foreach (Module obj in modules)
                {
                    Type[] types = obj.GetTypes();
                    foreach (Type objType in types)
                    {
                        if (objType.Name == "LogWriter")
                        {
                            try
                            {
                                objType.InvokeMember("typeID", BindingFlags.SetField | BindingFlags.Public | BindingFlags.Static, null, null, new object[] { 1200 });
                                                        
                                IWriter writer =  (IWriter)Activator.CreateInstance(objType, false);
                                writer.Write();
                            }
                            catch (Exception err)
                            {
                                Console.WriteLine(err.Message);
                            }
                        }
                    }

                }
            }

Useful classes:

Assembly
Module
Type
Activator
System.Reflection namespace is essential before using these classes!