Disable multiple objects from json.net stream

Question

CONGRATULATIONS! I need to deserialize a file of different objects serialized as json. Here is the resulting file:

{ "Number": 1, "Description": "Run version with strategy data", "Context": "NA" }[ { "N": 0.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.0, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 1.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.2999999523162842, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 2.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.0, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 3.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.2999999523162842, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 4.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.0, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 5.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.2999999523162842, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 6.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.0, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 7.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.2999999523162842, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 8.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.0, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" }, { "N": 9.0, "T": 2.0, "Adc": [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ], "SpltFr": 2.2999999523162842, "Acc": 1.0, "DAcc": 0.0, "Acc2": 1.0, "OscFr": 0.5, "Fltr": 0, "CmpEr": false, "ErrPck": 0, "IndxDiff": 0, "Pos": 0, "FastAcc": [], "GIndx": 0, "Indx": 0, "PcTime": "0001-01-01T00:00:00" } ] 

I am using json.net, but it does not seem to work the way I want.

 StreamReader reader = new StreamReader(fileName, Encoding.GetEncoding(1251)); var serializer = new JsonSerializer() { CheckAdditionalContent = false }; var obj1 = serializer.Deserialize(reader, typeof(Type1)); var obj2 = serializer.Deserialize(reader, typeof(Type2)); 

This code reads only the first object and gives an exeption when reading the second. What am I doing wrong? Can json.net complete my task? Thanks in advance!

Taking some tips from this thread, I changed my code:

 using (FileStream fs = File.Open(fileName, FileMode.Open)) using (StreamReader sr = new StreamReader(fs, Encoding.GetEncoding(1251))) using (JsonTextReader jr = new JsonTextReader(sr)) { JsonSerializer serializer = new JsonSerializer() { Formatting = Newtonsoft.Json.Formatting.Indented, CheckAdditionalContent = false, TypeNameHandling = TypeNameHandling.Auto }; var data1 = serializer.Deserialize(jr, typeof(Type1)); var data2 = serializer.Deserialize(jr, typeof(List<Type2>)); } 

But it still does not work correctly. It seems that after reading the first object, my cursor does not stop immediately at the end of it, but somewhere in the second object. Therefore, my reader can no longer read any objects.

Answer 1

UPDATE: The latest JSON.NET wizard now supports this by installing SupportMultipleContent on JsonReader .

---

As far as I know, JSON.NET does not support this, so I decided to implement this function. The result on github , usage will be like this:

 var reader = new JsonTextReader( new StreamReader(fileName, Encoding.GetEncoding(1251))); var serializer = new JsonSerializer { CheckAdditionalContent = false }; var obj1 = serializer.Deserialize(reader, typeof(Type1)); var obj2 = serializer.Deserialize(reader, typeof(Type2)); 

You need to explicitly use JsonTextReader here, because this is what contains the characters read from TextReader .

Answer 2

This question was asked again, and there was a good working example: fooobar.com/questions/1502206 / ...

Here is my test code based on the link above:

 var reader = new JsonTextReader(Console.In); reader.SupportMultipleContent = true; var serializer = new JsonSerializer(); while (reader.Read()) { try { var message = serializer.Deserialize<string>(reader); Console.WriteLine("Got message: {0}", message); } catch (Exception exception) { Console.WriteLine(exception.Message); } } 

Hope this helps someone.