我正在使用 Newtonsoft JSON 库对传入的原始 JSON 执行动态反序列化,并发现了一些我无法解释的东西.
I am using the Newtonsoft JSON library to perform dynamic deserialisation on incoming raw JSON and have found something that I just can't explain.
起点是以下 JSON 字符串:
The starting point is the following JSON string:
{
"task": {
"dueDate": "2012-12-03T00:00:00"
}
}
没什么太复杂的...
在代码中我正在这样做:
In code I am then doing this:
var dyn = JsonConvert.DeserializeObject<dynamic>(rawJson);
DateTime dueDate = dyn.task.dueDate.Value;
这段代码已经存在了几个月并且运行良好,但是在最近的测试版本中,我们看到了以下错误:
This code has been in place for months and works fine, however in a recent test build we were seeing the following error:
'Newtonsoft.Json.Linq.JObject' 不包含对任务"
'Newtonsoft.Json.Linq.JObject' does not contain a definition for 'task'
堆栈跟踪:在 CallSite.Target(Closure , CallSite , Object ) 在System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,Tret](CallSite站点,T0 arg0)
Stack Trace: at CallSite.Target(Closure , CallSite , Object ) at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
现在这很奇怪,如果我更改上面的代码,一切都会重新开始工作:
Now this is where is gets odd, everything starts to work again if I change the code above from:
DateTime dueDate = dyn.task.dueDate.Value;
到
DateTime dueDate = dyn["task"]["dueDate"].Value;
因此,尽管这是已修复",但我不明白为什么要修复它以及可能的原因是什么.有人有什么想法吗
So, although this is "fixed" I don't understand why this fixes it and what the possible cause could be. Does anybody have any ideas
你可以试试这个:
dynamic task = JObject.Parse(rawJson);
文档:动态查询 JSON
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