ServiceStack.Text.JsonObject.Parse vs. NewtonSoft.Json.Linq.JObject.Parse for nested tree of 'dynam

Question

我想尝试ServiceStack的json解析，但我已经找到了如何通过Newtonsoft完成我需要的东西。同样的事情可以通过ServiceStack完成吗？

我已经尝试过注释掉的代码，但它给出了异常，请参阅下面的异常详细信息。

谢谢！

Josh

[Test]
public void TranslateFromGitHubToCommitMessage()
{
const string json =
@"
{
'commits': 
[
{
'author': {
'email': '[e-mail]',
'name': 'The Null Developer'
},
'message': 'okay i give in'
},
{
'author': {
'email': '[e-mail]',
'name': 'Doc U. Mentation'
},
'message': 'Updating the docs, that's my job'
},
{
'author': {
'email': '[e-mail]',
'name': 'Doc U. Mentation'
},
'message': 'Oops, typos'
}
]
}
";
dynamic root = JObject.Parse(json);
//dynamic root = ServiceStack.Text.JsonSerializer.DeserializeFromString<JsonObject>(json);
//dynamic root = ServiceStack.Text.JsonObject.Parse(json);
var summaries = new List<string>();
foreach (var commit in root.commits)
{
var author = commit.author;
var message = commit.message;
summaries.Add(string.Format("{0} <{1}>: {2}", author.name, author.email, message));
}            
const string expected1 = "The Null Developer <[e-mail]>: okay i give in";
const string expected2 = "Doc U. Mentation <[e-mail]>: Updating the docs, that's my job";
const string expected3 = "Doc U. Mentation <[e-mail]>: Oops, typos";
Assert.AreEqual(3, summaries.Count);
Assert.AreEqual(expected1, summaries[0]);
Assert.AreEqual(expected2, summaries[1]);
Assert.AreEqual(expected3, summaries[2]);
}

异常详细信息

使用第一条注释行时：

dynamic root = ServiceStack.Text.JsonSerializer.DeserializeFromString<JsonObject>(json);

调用该方法时会发生此异常。

NullReferenceException：

at ServiceStack.Text.Common.DeserializeListWithElements`2.ParseGenericList(String value, Type      createListType, ParseStringDelegate parseFn)
at ServiceStack.Text.Common.DeserializeEnumerable`2.<>c__DisplayClass3.<GetParseFn>b__0(String value)
at ServiceStack.Text.Common.DeserializeSpecializedCollections`2.<>c__DisplayClass7.  <GetGenericEnumerableParseFn>b__6(String x)
at ServiceStack.Text.Json.JsonReader`1.Parse(String value)
at ServiceStack.Text.JsonSerializer.DeserializeFromString[T](String value)
at GitHubCommitAttemptTranslator.Tests.GitHubCommitAttemptTranslatorTests.TranslateFromGitHubToCommitMessage()

第二个：

dynamic root = ServiceStack.Text.JsonObject.Parse(json);
var summaries = new List<string>();
foreach (var commit in root.commits) // <-- Happens here

"ServiceStack.Text.JsonObject"不包含"提交"的定义

注意：如果我使用第一行的代码，但将类型更改为或而不是，则消息为"string"不包含"commits"的定义

at CallSite.Target(Closure , CallSite , Object )
at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
at GitHubCommitAttemptTranslator.Tests.GitHubCommitAttemptTranslatorTests.TranslateFromGitHubToCommitMessage()

从.NET 4.0 ServiceStack使用DynamicJson后

参考mythz的评论：这个测试用例是有效的，但如果我像下面这样修改它：

var dog = new { Name = "Spot", Parts = new { Part1 = "black", Part2 = "gray" }, Arr = new [] { "one", "two", "three"} };
var json = DynamicJson.Serialize(dog);
var deserialized = DynamicJson.Deserialize(json);

然后，反序列化。Name和Parts可以，但Arr属于字符串类型。

还有：

如果我使用引号，它似乎不起作用。这正常吗？json2是有效的(在某种程度上，Arr仍然是一个字符串)，但json3根本不起作用。它只是返回

Immediate Window:
deserialized = DynamicJson.Deserialize(json3);
{}
base {System.Dynamic.DynamicObject}: {}
_hash: Count = 1
----- code: -----
var json2 =
@"
{
""Name"": ""Spot"",
""Parts"": {
""Part1"": ""black"",
""Part2"": ""gray""
},
""Arr"": [
""one"",
""two"",
""three""
]
}";
var json3 =
@"
{
'Name': 'Spot',
'Parts': {
'Part1': 'black',
'Part2': 'gray'
},
'Arr': [
'one',
'two',
'three'
]
}";
var deserialized = DynamicJson.Deserialize(json1);            

Answer 1

ServiceStack的JSON序列化程序也支持动态解析，请参阅wiki页面的动态JSON部分中有关如何解析GitHub的JSON的示例。