Reflection.Emit的大厦有实体图 [英] Reflection.Emit Building a entity graph

问题描述

我花了一些时间试图与Reflection.Emit的动态建立的实体图。创建一个新的平板类型（类），实例并与反射使用它装配简单，工作正常。但是，当涉及到建筑结构又一动态类的泛型列表，它变得更复杂，我被困。基本上，我想动态生成的结构如下：

I have spent some time trying to building an entity graph dynamically with Reflection.Emit. Creating a assembly with a new flat type (class), instantiate it and use it with reflection is easy and works fine. But when it comes to building a structure with generic lists of yet another dynamic classes, it gets more complicated and I got stuck. Basically, I would like to build the following structure dynamically:

public class Head
{
    public string HeadId { get; set; }
    public AssignmentType HeadType { get; set; }
    public int TestIndicator { get; set; }
    public List<Item> Items { get; set; }

    public Head()
    {
        Items = new List<Item>();
    }
}

public class Item
{
    public string ItemId { get; set; }
    public int Weight { get; set; }
    public List<Description> Descriptions { get; set; }

    public Item()
    {
        Descriptions = new List<Description>();
    }
}

public class Description
{
    public string DescriptionText { get; set; }
    public string Country { get; set; }
}

public enum AssignmentType
{
    TypeA,
    TypeB,
    TypeC
}

一直在寻找的例子不胜枚举，但到目前为止，我还没有发现任何解决该问题。如果有人有一个样品或可以点我在正确的方向通过使用Reflection.Emit的解决这个，这将是非常赞赏。

Have been looking for numerous examples but so far I have not found anything addressing this. If someone have a sample or could point me in the right direction for solving this by using Reflection.Emit, it would be very appreciated.

推荐答案

最简单的解决方法是使用 CSharpCodeProvider 从 Microsoft.CSharp 命名空间：

The simplest solution is to use CSharpCodeProvider from Microsoft.CSharp namespace:

    string source = "public class Description" +
                    "{" +
                    "   public string DescriptionText { get; set; }" +
                    "   public string Country { get; set; }" +
                    "}";

    CSharpCodeProvider codeProvider = new CSharpCodeProvider();
    System.CodeDom.Compiler.CompilerParameters parameters = new CompilerParameters();
    parameters.GenerateExecutable = false;
    parameters.GenerateInMemory = true;
    CompilerResults result = codeProvider.CompileAssemblyFromSource(parameters, source);
    if (!result.Errors.HasErrors)
    {
        Type type = result.CompiledAssembly.GetType("Description");
        var instance = Activator.CreateInstance(type);
    }

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