Json data isn't being parsed

Question

I have the following JSON data and this is how it appears in the Visual Studio watch window:

 "{\"TestResponse\":\"[{isValid:false,errorMessage:\'\',mainPath:~/yourName/yourfolder/,fileName:\'tempFile.txt\'}]\"}"

So I made two classes:

 [System.Serializable]
 public class ResponseData
 {
     public bool isValid;
     public string errorMessage;
     public string mainPath;
     public string fileName;
 }
 
 [System.Serializable]
 public class ResponseDataList
 {
     public List<ResponseData> TestResponse;
 }

And here's how I'm parsing it:

 ResponseDataList responseDataList = JsonUtility.FromJson<ResponseDataList >(jsonData);

I'm always getting zero elements in the responseDataList though. I tried changing the bool to a string, and the errorMessage to a character (because it looks like it an empty character '\') but no luck.

Answer 1

Well, like ranch000 pointed out your json is not valid json at all. The keys and also string values always have to be double quoted. No other quotes are allowed. Here's a full description of the json format. Your string actually does represent valid json, but not what you think it contains. All you got is an object with a single key-value pair. Without all the backslash escaping your json looks like this:

 {
     "TestResponse": "[{isValid:false,errorMessage:'',mainPath:~/yourName/yourfolder/,fileName:'tempFile.txt'}]"
 }

So from the json's point of view TestResponse is just a string, nothing else. The content of that string is not valid json, even when it wasn't put into double quotes.

Like ranch000 said your actual json text should look like this

 {
     "TestResponse": [
         {
             "isValid":false,
             "errorMessage":"",
             "mainPath":"~/yourName/yourfolder/",
             "fileName":"tempFile.txt"
         }
     ]
 }

With backslash escaping and without the whitespace it should look like this

 // C#
 string jsonText = "{ \"TestResponse\": [{ \"isValid\":false, \"errorMessage\":\"\", \"mainPath\":\"~/yourName/yourfolder/\", \"fileName\":\"tempFile.txt\" }]}";

This should parse correctly with the classes you have there. If you got your "json" from a web service, the issue is most likely in that web service as the returned data is not in the format you expected.

Answer 2

Answer by ShadyProductions · Mar 11, 2020 at 01:43 PM

With JsonUtility it seems to work with this:

 string jsonData = "{\"TestResponse\":[{\"isValid\":true,\"errorMessage\":\"null\",\"mainPath\":\"path\",\"fileName\":\"fname\"}]}";

Here is a formatted overview:

 {
   "TestResponse": [
     {
       "isValid": true,
       "errorMessage": "null",
       "mainPath": "path",
       "fileName": "fname"
     }
   ]
 }

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Json data isn't being parsed

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