将JObject转换为动态对象

I am calling a REST endpoint from C# and I am receiving json which gets serialized into an object. One of the properties on this object is a dynamic property. The value of the dynamic property is set as a anonymous object on the server site like this:

我从C＃调用REST端点，我收到json，它被序列化为一个对象。此对象的一个属性是动态属性。动态属性的值在服务器站点上设置为匿名对象，如下所示：

myObject.MyDynamicProp = new { Id = "MyId2134", Name = "MyName" };

On the client site the value of the dynamic property from the json serialization is a JObject containing the following value:

在客户端站点上，json序列化的动态属性值是一个包含以下值的JObject：

{{
  "id": "MyId2134",
  "Name": "MyName"
}}

I would have expected to be able to access the properties like this:

我原以为能够访问这样的属性：

var s = myObject.MyDynamicProp.Name;

but it does not find the Name property instead I have to get the value like this:

但它没有找到Name属性，而是我必须得到这样的值：

var s = myObject.MyDynamicProp["Name"].Value;

I tried converting the JObject into a dynamic object like this but it returns JObject:

我尝试将JObject转换为这样的动态对象，但它返回JObject：

var dyn = myObject.MyDynamicProp.ToObject<dynamic>();

How can I convert the dynamic property value such that I can call its properties directly?

如何转换动态属性值，以便我可以直接调用其属性？

var s = myObject.MyDynamicProp.Name;

UPDATE ...

更新......

I ran the following

我跑了以下

 dynamic d = JsonConvert.DeserializeObject("{\"MyDynamicProp\": {\"id\": \"MyId2134\", \"Name\": \"MyName\"}}");
 string name = d.MyDynamicProp.Name;

Which gives me the following the error:

这给了我以下错误：

 {Microsoft.CSharp.RuntimeBinder.RuntimeBinderException:    `Newtonsoft.Json.Linq.JObject' does not contain a definition for `MyDynamicProp'
  at Microsoft.Scripting.Interpreter.ThrowInstruction.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00027]

I would like to add that this is an Xamarin iOS project and the code is located in a PCL library.

我想补充一点，这是一个Xamarin iOS项目，代码位于PCL库中。

I assumed there was a problem with my code but it looks like it is not possible to use dynamic types within a Xamarin iOS project. https://developer.xamarin.com/guides/ios/advanced_topics/limitations/

我认为我的代码存在问题，但看起来在Xamarin iOS项目中无法使用动态类型。 https://developer.xamarin.com/guides/ios/advanced_topics/limitations/

1 个解决方案

#1

It is actually quite easy. Instead of using var use dynamic on your JObject and you will be fine:

实际上很容易。而不是在你的JObject上使用var use dynamic，你会没事的：

dynamic do = myObject.MyDynamicProp;

string name = do.Name;

From your fragment:

从您的片段：

dynamic d = JsonConvert.DeserializeObject("{\"MyDynamicProp\": {\"id\": \"MyId2134\", \"Name\": \"MyName\"}}");
string name = d.MyDynamicProp.Name;

Console.WriteLine(name); // writes MyName

Why this works: As Richard explained, JObject derives indirectly from JToken which implements IDynamicMetaObjectProvider. It is that interface that allows dynamic to work.

为什么会这样：正如Richard解释的那样，JObject间接地从实现IDynamicMetaObjectProvider的JToken派生。正是这个界面允许动态工作。

#1