DataContractSerializer - problems

Question

I have something that should be a VERY STRONG issue with the Serializer Data Contract. He refuses to work. I'm just trying to serialize an object in an XmlDocument, but I seem to be pushing the wall.

Here is the data I want to serialize:

[DataContract(Namespace="urn://test", Name = "ServiceFault1")]
public class ServiceFault
{
    [DataMember()]
    public int hello { get; set; }

    [DataMember()]
    public List<Error> Errors {get; set;}
}

[DataContract(Namespace = "urn://test", Name = "Error1")]
public class Error
{
    [DataMember()]
    public string ErrorCategoryCode { get; set; }

    [DataMember()]
    public string LocalErrorCode { get; set; }

    [DataMember()]
    public string Description { get; set; }
}

And a method that performs serialization;

    public static XmlDocument Serialize(ServiceFault toSer)
    {
        DataContractSerializer ser = new DataContractSerializer(toSer.GetType());

        MemoryStream mem = new MemoryStream();
        ser.WriteObject(XmlWriter.Create(mem), toSer);

        XmlDocument tmp = new XmlDocument();
        mem.Seek(0, SeekOrigin.Begin);
        tmp.Load(mem);

        return tmp;
    }

Whenever I call the serialize method, the memory stream is always empty. I also tried the line builder, just to find out if something came out.

If I use XmlSerializer, this works, however, I would like to understand why the code above actually does not work? Why is the serializer always empty?

Thanks for any help! TM

Answer 1

, , , , . , DataContract , , .

DataContractSerializer serializer = new DataContractSerializer(toSers.GetType());
MemoryStream ms = new MemoryStream();
serializer.WriteObject(ms, toSer);
ms.Position = 0;

string serializedContent;
using(StreamReader sr = new StreamReader(ms))
{
  serializedContent = sr.ReadToEnd();   
}

, , , MemoryStream 0, Seek().

XmlDocument, , XmlDocument.LoadXml .

Answer 2

, XmlWriter :

ser.WriteObject(XmlWriter.Create(mem), toSer);

:

public static XmlDocument Serialize(ServiceFault toSer)
{
    DataContractSerializer ser = new DataContractSerializer(toSer.GetType());
    XmlDocument tmp = new XmlDocument();
    using (MemoryStream mem = new MemoryStream())
    {
        using (var memWriter = XmlWriter.Create(mem))
        {
            ser.WriteObject(memWriter, toSer);
        }

        mem.Seek(0, SeekOrigin.Begin);
        tmp.Load(mem);
    }
    return tmp;
}