Why is JObject.Parse creating an object inside an object from a string?

Question

I have a string value:

var responseString = {"ErrorType":"ServerError","Message":"Incoming data error.","Properties":null}

When I call JObject.Parse(responseString);, I get the following dynamic object:

{{  
"ErrorType": "ServerError",  
"Message": "Incoming data error.",  
"Properties": null
}}

Why is JObject creating a dynamic object that is an object wrapped in an object? I was hoping to write code to access the Message property such as responseMessage.Message as string, but that throws an error.

Christoph Herold · Accepted Answer · 2019-04-03 15:45:39Z

1

I just tried the following code in LinqPad:

var responseString = "{\"ErrorType\":\"ServerError\",\"Message\":\"Incoming data error.\",\"Properties\":null}";
dynamic responseMessage = JObject.Parse(responseString);
var msg = (string) responseMessage.Message;
msg.Dump();

In the output, I get the desired Incoming data error. string, so it looks like it is doing what it should. How does your code look? And what version of Json.NET are you using? Also, it is NOT possible to use as to convert to string, as this will return null, since the value is a JToken. You need the explicit cast.

answered Apr 3, 2019 at 15:45

Christoph Herold

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1 Comment

AmoebaMan17 Over a year ago

Thanks for the extra explanation... that helped narrow down my issues exactly. I was using as. And then when it wasn't working correctly, I tried to use VS's watch window to test different properties and those would give me the error message.

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