一種快速反射方法

反射類：

    using System;
    using System.Reflection.Emit;
    using System.Reflection;

    public sealed class DynamicMethodCompiler
    {
        // DynamicMethodCompiler
        private DynamicMethodCompiler() { }
        
        // CreateGetDelegate
        internal static Func<T, F> CreateGetHandler<T, F>(Type type, FieldInfo fieldInfo)
        {
            DynamicMethod dynamicGet = CreateGetDynamicMethod<T, F>(type);
            ILGenerator getGenerator = dynamicGet.GetILGenerator();

            getGenerator.Emit(OpCodes.Ldarg_0);
            getGenerator.Emit(OpCodes.Ldfld, fieldInfo);
            getGenerator.Emit(OpCodes.Ret);

            return (Func<T, F>)dynamicGet.CreateDelegate(typeof(Func<T, F>));
        }

        // CreateSetDelegate
        internal static Action<T, F> CreateSetHandler<T, F>(Type type, FieldInfo fieldInfo)
        {
            DynamicMethod dynamicSet = CreateSetDynamicMethod<T, F>(type);
            ILGenerator setGenerator = dynamicSet.GetILGenerator();

            setGenerator.Emit(OpCodes.Ldarg_0);
            setGenerator.Emit(OpCodes.Ldarg_1);
            setGenerator.Emit(OpCodes.Stfld, fieldInfo);
            setGenerator.Emit(OpCodes.Ret);

            return (Action<T, F>)dynamicSet.CreateDelegate(typeof(Action<T, F>));
        }

        // CreateGetDelegate
        internal static Func<T, F> CreateGetHandler<T, F>(Type type, PropertyInfo propertyInfo)
        {
            MethodInfo getMethodInfo = propertyInfo.GetGetMethod(true);
            DynamicMethod dynamicGet = CreateGetDynamicMethod<T, F>(type);
            ILGenerator getGenerator = dynamicGet.GetILGenerator();

            getGenerator.Emit(OpCodes.Ldarg_0);
            getGenerator.Emit(OpCodes.Call, getMethodInfo);
            getGenerator.Emit(OpCodes.Ret);

            return (Func<T, F>)dynamicGet.CreateDelegate(typeof(Func<T, F>));
        }

        // CreateSetDelegate
        internal static Action<T, F> CreateSetHandler<T, F>(Type type, PropertyInfo propertyInfo)
        {
            MethodInfo setMethodInfo = propertyInfo.GetSetMethod(true);
            DynamicMethod dynamicSet = CreateSetDynamicMethod<T, F>(type);
            ILGenerator setGenerator = dynamicSet.GetILGenerator();

            setGenerator.Emit(OpCodes.Ldarg_0);
            setGenerator.Emit(OpCodes.Ldarg_1);
            setGenerator.Emit(OpCodes.Call, setMethodInfo);
            setGenerator.Emit(OpCodes.Ret);

            return (Action<T, F>)dynamicSet.CreateDelegate(typeof(Action<T, F>));
        }

        // CreateGetDynamicMethod
        private static DynamicMethod CreateGetDynamicMethod<T, F>(Type type)
        {
            return new DynamicMethod("DynamicGet", typeof(F), new Type[] { typeof(T) }, type, true);
        }

        // CreateSetDynamicMethod
        private static DynamicMethod CreateSetDynamicMethod<T, F>(Type type)
        {
            return new DynamicMethod("DynamicSet", typeof(void), new Type[] { typeof(T), typeof(F) }, type, true);
        }
    }

 

業務類：

    class PuOrder
    {
        private string __orderCode;

        public string OrderCode
        {
            get { return __orderCode; }
            set { __orderCode = value; }
        }
    }

測試方法：

            PuOrder order = new PuOrder();

            Type type = typeof(PuOrder);
            PropertyInfo propertyInfo = type.GetProperty("OrderCode");

            Func<PuOrder, string> getPropertyInfo = DynamicMethodCompiler.CreateGetHandler<PuOrder, string>(type, propertyInfo);
            Action<PuOrder, string> setPropertyInfo = DynamicMethodCompiler.CreateSetHandler<PuOrder, string>(type, propertyInfo);

            setPropertyInfo(order, "000000001");
            string currentValue = getPropertyInfo(order);