Using DataContractSerializer to serialize but can t deserialize back

Question

I have the following 2 functions   public static string Serialize object obj        DataContractSerializer serializer   new DataContractSerializer obj GetType         MemoryStream memoryStream   new MemoryStream        serializer WriteObject memoryStream  obj       return Encoding UTF8 GetString memoryStream GetBuffer        public static object Deserialize string xml  Type toType        MemoryStream memoryStream   new MemoryStream Encoding UTF8 GetBytes xml          memoryStream Position   0L      XmlDictionaryReader reader   XmlDictionaryReader CreateTextReader memoryStream  Encoding UTF8  new XmlDictionaryReaderQuotas    null       DataContractSerializer dataContractSerializer   new DataContractSerializer toType       return dataContractSerializer ReadObject reader       The first one seems to serialize an object to an xml string just fine   The XML appears valid  no broken tags  no white spaces at the beginning or at the end  etc   Now the second function doesn t want to deserialize my xml string back to the object   On the last line I get      There was an error deserializing the   object of type  MY OBJECT TYPE HERE     The data at the root level is invalid    Line 1  position 1    What am I doing wrong   I tried rewriting the Deserialize function a few times  and it always seems to be the same kind of error   Thank you   Oh  and this is how I m calling the 2 functions   SomeObject so   new SomeObject    string temp   SerializationManager Serialize so   so    SomeObject SerializationManager Deserialize temp  typeof SomeObject

User · Answer

I ended up doing the following and it works.

public static string Serialize(object obj)
{
    using (MemoryStream memoryStream = new MemoryStream())
    {
        DataContractSerializer serializer = new DataContractSerializer(obj.GetType());
        serializer.WriteObject(memoryStream, obj);
        return Encoding.UTF8.GetString(memoryStream.ToArray());
    }
}

public static object Deserialize(string xml, Type toType)
{
    using (MemoryStream memoryStream = new MemoryStream(Encoding.UTF8.GetBytes(xml)))
    {
        XmlDictionaryReader reader = XmlDictionaryReader.CreateTextReader(memoryStream, Encoding.UTF8, new XmlDictionaryReaderQuotas(), null);
        DataContractSerializer serializer = new DataContractSerializer(toType);
        return serializer.ReadObject(reader);
    }
}

It seems that the major problem was in the Serialize function when calling stream.GetBuffer(). Calling stream.ToArray() appears to work.

User · Answer

Here is how I ve always done it       public static string Serialize object obj            using MemoryStream memoryStream   new MemoryStream            using StreamReader reader   new StreamReader memoryStream                 DataContractSerializer serializer   new DataContractSerializer obj GetType                 serializer WriteObject memoryStream  obj               memoryStream Position   0              return reader ReadToEnd                         public static object Deserialize string xml  Type toType            using Stream stream   new MemoryStream                  byte   data   System Text Encoding UTF8 GetBytes xml               stream Write data  0  data Length               stream Position   0              DataContractSerializer deserializer   new DataContractSerializer toType               return deserializer ReadObject stream

User · Answer

Other solution is   public static T Deserialize lt T gt  string rawXml        using  XmlReader reader   XmlReader Create new StringReader rawXml                  DataContractSerializer formatter0                new DataContractSerializer typeof T            return  T formatter0 ReadObject reader             One remark  sometimes it happens that raw xml contains e g      lt  xml version  1 0  encoding  utf-16   gt   then of course you can t use UTF8 encoding used in other examples

User · Answer

This best for XML Deserialize    public static object Deserialize string xml  Type toType                 using  MemoryStream memoryStream   new MemoryStream Encoding UTF8 GetBytes xml                          System IO StreamReader str   new System IO StreamReader memoryStream               System Xml Serialization XmlSerializer xSerializer   new System Xml Serialization XmlSerializer toType               return xSerializer Deserialize str

[c#] Using DataContractSerializer to serialize, but can't deserialize back

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