[Mono-bugs] [Bug 551671] New: Exception in DataContractJsonSerializer when deserializing JSON created by NETFX DataContractJsonSerializer

[bugzilla_noreply at novell.com]

http://bugzilla.novell.com/show_bug.cgi?id=551671


           Summary: Exception in DataContractJsonSerializer when
                    deserializing JSON created by NETFX
                    DataContractJsonSerializer
    Classification: Mono
           Product: MonoTouch
           Version: unspecified
          Platform: Other
        OS/Version: Mac OS X 10.6
            Status: NEW
          Severity: Blocker
          Priority: P5 - None
         Component: Class Libraries
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: christian.weyer at thinktecture.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


Description of Problem:
THe MonoTouch DataContractJsonSerializer fails with an exception when
deserializing a JSON string into an object - the JSON was created by
DataContractJsonSerializer from .NET Framework 3.5 SP1.

Steps to reproduce the problem:
1. 
private TResult Deserialize<TResult> (string data) where TResult : class
        {
            Debug.WriteLine ("data: " + data);
            var ser = new DataContractJsonSerializer (typeof(TResult));
            TResult result;

            using (var ms = new MemoryStream (Encoding.UTF8.GetBytes (data)))
            {
                result = ser.ReadObject (ms) as TResult;
            }

            return result;
        }
2. 


Actual Results:
Exception:
Unhandled Exception: System.Reflection.TargetInvocationException: Exception has
been thrown by the target of an invocation. --->
System.Runtime.Serialization.SerializationException: Deserialization has failed
---> System.InvalidOperationException: Node type Element is not supported in
this operation.  (line 1, column 14)
  at System.Xml.XmlReader.ReadContentString (Boolean isText) [0x00000] 
  at System.Xml.XmlReader.ReadContentString () [0x00000] 
  at System.Xml.XmlReader.ReadContentAsString () [0x00000] 
  at System.Xml.XmlDictionaryReader.ReadContentAsString (Int32
maxStringContentLength) [0x00000] 
  at System.Xml.XmlDictionaryReader.ReadContentAsString () [0x00000] 
  at System.Xml.XmlDictionaryReader.ReadElementContentAsString () [0x00000] 
  at
System.Runtime.Serialization.Json.JsonSerializationReader.ReadInstanceDrivenObject
() [0x00000] 
  at System.Runtime.Serialization.Json.JsonSerializationReader.ReadObject
(System.Type type) [0x00000] 
  at
System.Runtime.Serialization.Json.JsonSerializationReader.DeserializeGenericCollection
(System.Type collectionType, System.Type elementType) [0x00000] 
  at System.Runtime.Serialization.Json.JsonSerializationReader.ReadObject
(System.Type type) [0x00000] 
  at System.Runtime.Serialization.Json.JsonSerializationReader.ReadRoot ()
[0x00000] 
  at System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject
(System.Xml.XmlReader reader, Boolean verifyObjectName) [0x00000] 
  --- End of inner exception stack trace ---
  at System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject
(System.Xml.XmlReader reader, Boolean verifyObjectName) [0x00000] 
  at System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject
(System.Xml.XmlDictionaryReader reader, Boolean verifyObjectName) [0x00000] 
  at System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject
(System.Xml.XmlDictionaryReader reader) [0x00000] 
  at System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject
(System.IO.Stream stream) [0x00000] 
  at iTecTeacher.MediaServiceClient.Deserialize[List`1] (System.String data)
[0x00000] 
  at iTecTeacher.MediaServiceClient.WebClient_DownloadStringCompleted
(System.Object sender, System.Net.DownloadStringCompletedEventArgs e) [0x00000] 
  at System.Net.WebClient.OnDownloadStringCompleted
(System.Net.DownloadStringCompletedEventArgs args) [0x00000] 
  at System.Net.WebClient.<DownloadStringAsync>m__D (System.Object state)
[0x00000] 

Expected Results:
Should deserialize the JSON string to an object.

How often does this happen? 
Always.

Additional Information:

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