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2024-08-07 22beee93f14d042aa184148c53efb79e23416526

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using System;
using System.Reflection.Emit;
using System.Reflection;
using System.Collections.Generic;
using System.Threading;
using System.Runtime.InteropServices;
 
namespace PdmSwPlugin.Test.Model
{
    public class HandlerBuilder
    {
        public static object test(dynamic target) {
            
            MethodAttributes getSetAttr = MethodAttributes.Public | MethodAttributes.SpecialName;
 
            AssemblyName DemoName = new AssemblyName("DynamicAssembly");
            AssemblyBuilder dynamicAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(DemoName, AssemblyBuilderAccess.RunAndSave);
            //动态创建模块  
            ModuleBuilder mb = dynamicAssembly.DefineDynamicModule(DemoName.Name, DemoName.Name + ".dll");
            //动态创建类MyClass  
            TypeBuilder tb = mb.DefineType("MyClass", TypeAttributes.Public);
            //动态创建字段  
            FieldBuilder fb = tb.DefineField("target", typeof(string), FieldAttributes.Private);
 
            //动态创建构造函数  
            // Create constructor args and define constructor.
            Type[] constructorArgs = { typeof(string) };
            ConstructorBuilder constructor = tb.DefineConstructor(
               MethodAttributes.Public, CallingConventions.Standard, constructorArgs);
 
            //生成指令  
            ILGenerator ilg = constructor.GetILGenerator();//生成 Microsoft 中间语言 (MSIL) 指令  
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.Emit(OpCodes.Ldarg_1);
            ilg.Emit(OpCodes.Stfld, fb);
            ilg.Emit(OpCodes.Ret);
 
            //动态创建属性  
            PropertyBuilder pb = tb.DefineProperty("Target", PropertyAttributes.HasDefault, typeof(string), null);
 
            //动态创建方法  
            MethodBuilder myMethod = tb.DefineMethod("get_Property", getSetAttr, typeof(string), Type.EmptyTypes);
            ilg = myMethod.GetILGenerator();
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.Emit(OpCodes.Ldfld, fb);
            ilg.Emit(OpCodes.Ret);
            pb.SetGetMethod(myMethod);
 
            MethodBuilder myMethod2 = tb.DefineMethod("set_Property", getSetAttr, null, new Type[] { typeof(string) });
            ilg = myMethod2.GetILGenerator();
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.Emit(OpCodes.Ldarg_1);
            ilg.Emit(OpCodes.Stfld, fb);
            ilg.Emit(OpCodes.Ret);
            pb.SetSetMethod(myMethod2);
 
            Type classType = tb.CreateType();
 
 
            
            //调用有参数的构造函数  
            Type[] ciParamsTypes = new Type[] { typeof(string) };
            object[] ciParamsValues = new object[] { "Hello World" };
            ConstructorInfo ci = classType.GetConstructor(ciParamsTypes);
            object Vector = ci.Invoke(ciParamsValues);
            //调用方法  
            object[] methedParams = new object[] { };
 
            return classType.InvokeMember("get_Property", BindingFlags.InvokeMethod, null, Vector, methedParams);
        }
    }
}