C# 将动态类型的属性添加到动态类型

我正在尝试创建类似以下内容的动态类型：

public class DataObjects
{
  public DataObjectsLesser1 SomeRandom0 { get; }
  public DataObjectsLesser2 SomeRandom1 { get; }
}

public class DataObjectsLesser1 
{
  public int Prop0 { get; }
}

public class DataObjectsLesser2
{
  public int Prop0 { get; }
}

下面的完整代码示例是real程序的简化版本，它使用第三方api创建树结构，您可以在其中导航嵌套类型

---

在实际的程序中，我可以轻松地创建顶级类型的DataObjects，以及DataObjectsLesser1/2的空版本。问题是，当我想创建DataObjectsLesser1/2的属性时——如果要复制错误——则忽略最内部循环中的值“Prop”+num，而将值“SomeRandom”+I*10用作属性名称。我看不出有任何逻辑上的原因，因为类型是按预期设置的（示例中为int）

我也不知道如何验证示例中发生了什么。我在实例变量中获得了一个动态类型，其中包含我生成的属性，但每个属性都不显示为类型化的-只有null属性，无法说明生成了什么类型。我需要浏览对象图进行测试

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
using System.Threading;

namespace TyeTes
{
    internal class Program
    {
        private static void CreateProperty(TypeBuilder typeBuilder, Type propertyType, string propertyName)
        {
            FieldBuilder fieldBuilder = typeBuilder.DefineField(propertyName + "X", propertyType, FieldAttributes.Private);
            PropertyBuilder propertyBuilder = typeBuilder.DefineProperty(propertyName, PropertyAttributes.HasDefault, propertyType, null);
            MethodBuilder propertyGetter = typeBuilder.DefineMethod("get_" + propertyName, MethodAttributes.Public |
                                                MethodAttributes.SpecialName | MethodAttributes.HideBySig, propertyType, Type.EmptyTypes);
            ILGenerator randomPropertyGetterIL = propertyGetter.GetILGenerator();
            randomPropertyGetterIL.Emit(OpCodes.Ldarg_0);
            randomPropertyGetterIL.Emit(OpCodes.Ldfld, fieldBuilder);
            randomPropertyGetterIL.Emit(OpCodes.Ret);
            propertyBuilder.SetGetMethod(propertyGetter);
        }

        private static void Main(string[] args)
        {
            var assembly = new AssemblyName("FieldTypes");
            AssemblyBuilder assemblyBuilder = Thread.GetDomain().DefineDynamicAssembly(assembly, AssemblyBuilderAccess.Run);
            ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule(assembly.Name);
            TypeBuilder typeBuilder = DefineType(moduleBuilder, "DataObjects");

            foreach (var i in Enumerable.Range(0, 3))
            {
                TypeBuilder subTypeBuilder = DefineType(moduleBuilder, "DataObjectsLesser" + i);
                foreach (var num in Enumerable.Range(0, 2))
                {
                    CreateProperty(subTypeBuilder, typeof(int), "Prop" + num);
                }
                CreateProperty(typeBuilder, subTypeBuilder.CreateType(), "SomeRandom" + i * 10);
            }
            Type randomType = typeBuilder.CreateType();
            var instance = Activator.CreateInstance(randomType);
        }

        public static TypeBuilder DefineType(ModuleBuilder modBuilder, string typeName)
        {
            TypeBuilder typeBuilder = modBuilder.DefineType(typeName,
                TypeAttributes.Public |
                TypeAttributes.Class |
                TypeAttributes.AutoClass |
                TypeAttributes.AnsiClass |
                TypeAttributes.BeforeFieldInit |
                TypeAttributes.AutoLayout,
                typeof(object));
            return typeBuilder;
        }
    }
}

---

关于你的第二个问题：

我需要浏览对象图进行测试

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
using System.Threading;

namespace TyeTes
{
    internal class Program
    {
        private static void CreateProperty(TypeBuilder typeBuilder, Type propertyType, string propertyName)
        {
            FieldBuilder fieldBuilder = typeBuilder.DefineField(propertyName + "X", propertyType, FieldAttributes.Private);
            PropertyBuilder propertyBuilder = typeBuilder.DefineProperty(propertyName, PropertyAttributes.HasDefault, propertyType, null);
            MethodBuilder propertyGetter = typeBuilder.DefineMethod("get_" + propertyName, MethodAttributes.Public |
                                                MethodAttributes.SpecialName | MethodAttributes.HideBySig, propertyType, Type.EmptyTypes);
            ILGenerator randomPropertyGetterIL = propertyGetter.GetILGenerator();
            randomPropertyGetterIL.Emit(OpCodes.Ldarg_0);
            randomPropertyGetterIL.Emit(OpCodes.Ldfld, fieldBuilder);
            randomPropertyGetterIL.Emit(OpCodes.Ret);
            propertyBuilder.SetGetMethod(propertyGetter);
        }

        private static void Main(string[] args)
        {
            var assembly = new AssemblyName("FieldTypes");
            AssemblyBuilder assemblyBuilder = Thread.GetDomain().DefineDynamicAssembly(assembly, AssemblyBuilderAccess.Run);
            ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule(assembly.Name);
            TypeBuilder typeBuilder = DefineType(moduleBuilder, "DataObjects");

            foreach (var i in Enumerable.Range(0, 3))
            {
                TypeBuilder subTypeBuilder = DefineType(moduleBuilder, "DataObjectsLesser" + i);
                foreach (var num in Enumerable.Range(0, 2))
                {
                    CreateProperty(subTypeBuilder, typeof(int), "Prop" + num);
                }
                CreateProperty(typeBuilder, subTypeBuilder.CreateType(), "SomeRandom" + i * 10);
            }
            Type randomType = typeBuilder.CreateType();
            var instance = Activator.CreateInstance(randomType);
        }

        public static TypeBuilder DefineType(ModuleBuilder modBuilder, string typeName)
        {
            TypeBuilder typeBuilder = modBuilder.DefineType(typeName,
                TypeAttributes.Public |
                TypeAttributes.Class |
                TypeAttributes.AutoClass |
                TypeAttributes.AnsiClass |
                TypeAttributes.BeforeFieldInit |
                TypeAttributes.AutoLayout,
                typeof(object));
            return typeBuilder;
        }
    }
}

我想到的最简单的方法是将动态程序集保存到磁盘，然后在或其他反编译器中查看它。为此，请指定

AssemblyBuilderAccess.RunAndSave

选项到

defineddynamicassembly

方法，并在

defineddynamicmodule

方法中提供文件名：

AssemblyBuilder assemblyBuilder = Thread.GetDomain().DefineDynamicAssembly(assembly, AssemblyBuilderAccess.RunAndSave);
ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule(assembly.Name, 
                                                                 "temp.dll");

然后在末尾添加：

assemblyBuilder.Save("temp.dll");

---

“如果要复制错误”？我已经试过你的代码，它似乎工作正常，所以我想知道我们能如何帮助你。@konRadkokosa我的最后一段呢？谢谢，正如我在回答中所说的，我建议简单地将其保存到磁盘。我恐怕这不起作用，错误消息出现在第一行：mscorlib.dll中出现“System.NotSupportedException”类型的未处理异常。其他信息：瞬态程序集中不能有持久化模块。这也是需要定义的DynamicAssembly（assembly，AssemblyBuilderAccess.RunAndSave），请更新您的answer@Jaycee是的，我忘记提了。我刚刚更新了我的答案。