CODEWITHSUNDEEP
xmlwcfxml-serializationwcf-data-services
Harry89pl
Harry89pl

Reputation: 2435

How to serialize into an XmlDocument/XmlElement in order to return it from WCF?

What i'm trying to do is return XmlDocument from my WCF Service.

The problem is that i got an error "Root element is missing."

here is my code

    public XmlElement GetDeviceListXML()// this got [XmlSerializerFormat]and [OperationContract]
    {
        List<Device> list = MyProject.BLL.Device.GetList();// here i getting list of devices from my database
        //Device is object which got [serializable] attribute
        XmlRootAttribute xra = new XmlRootAttribute("Device");
            xra.ElementName = "Devices";
            xra.Namespace = "http://MMEwidencja.pl";
            xra.IsNullable = false;
        XmlSerializer serializer = new XmlSerializer(typeof(List<Device>), xra);
        var stream = new MemoryStream();
        XmlDocument xDoc = new XmlDocument();;
        try
        {
            serializer.Serialize(stream, list);
            stream.Position = 0;// that what was I miss 
            xDoc.Load(stream);
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return xDoc.DocumentElement;
    }

How should I make this work?

Edited: I've got solution for this the problem was that XmlDocument tried to Load stream from last byte to last byte. I've missed to put Position to 0 in that stream.

Upvotes: 0

Views: 488

Answers (2)

tom redfern
tom redfern

Reputation: 31760

It would be much cleaner to return the xml as a stream of text and then to load it into a XmlDocument on the consumer.

Upvotes: 1

Oliver
Oliver

Reputation: 817

There's no root element because the XmlDocument.Load function thinks the stream has a 0 byte length.

Maybe read this link : http://geekswithblogs.net/.NETonMyMind/archive/2007/11/15/116862.aspx

Upvotes: 1

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