Xml Serialization in C #

Question

I'm trying to follow Microsoft 's guide on XML serialization, but I'm having problems!

This is the XML file used as input:

<?xml version="1.0" encoding="utf-8"?>
<Books xmlns:books="http://www.cpandl.com" xmlns:money="http://www.cohowinery.com">
  <money:Book>
    <books:TITLE>A Book Title</books:TITLE>
    <money:PRICE books:currency="US Dollar">
      <money:price>9.95</money:price>
    </money:PRICE>
  </money:Book>
</Books>

This is the class for binding XML:

public class OrderedItem
{
        [XmlElement(Namespace = "http://www.cpandl.com")]
        public string ItemName;
        [XmlElement(Namespace = "http://www.cpandl.com")]
        public string Description;
        [XmlElement(Namespace = "http://www.cohowinery.com")]
        public decimal UnitPrice;
        [XmlElement(Namespace = "http://www.cpandl.com")]
        public int Quantity;
        [XmlElement(Namespace = "http://www.cohowinery.com")]
        public decimal LineTotal;
        // A custom method used to calculate price per item.
        public void Calculate()
        {
            LineTotal = UnitPrice * Quantity;
        }
    }

This function reads the XML into the "OrderedItem" class:

Console.WriteLine("Reading with Stream");

// Create an instance of the XmlSerializer.
var serializer = new XmlSerializer(typeof(OrderedItem));

// Reading the XML document requires a FileStream.
Stream reader = new FileStream(filename, FileMode.Open);

// Declare an object variable of the type to be deserialized.
// Call the Deserialize method to restore the object state.
var i = (OrderedItem)serializer.Deserialize(reader);

Console.SetOut(new StreamWriter("a_output.xml"));
serializer.Serialize(Console.Out, i);

This is the XML after reading and rewriting:

<?xml version="1.0" encoding="utf-8"?>
<OrderedItem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <ItemName xmlns="http://www.cpandl.com">Widget</ItemName>
  <Description xmlns="http://www.cpandl.com">Regular Widget</Description>
  <UnitPrice xmlns="http://www.cohowinery.com">2.3</UnitPrice>
  <Quantity xmlns="http://www.cpandl.com">10</Quantity>
  <LineTotal xmlns="http://www.cohowinery.com">23</LineTotal>
</OrderedItem>

As you can see, the namespace is expanded. How to write output to get the same XML with namespace label, not uri?

Answer 1

You might want to take a look at the overloaded method to serialize the object:

default serialization

definition of namespaces for serialization

, XmlSerializerNamespaces :

    // Create an XmlSerializerNamespaces object.
    XmlSerializerNamespaces ns = new XmlSerializerNamespaces();

    // Add two prefix-namespace pairs.
    ns.Add("inventory", "http://www.cpandl.com");
    ns.Add("money", "http://www.cohowinery.com");

, .

Answer 2

XmlSerializerNameSpaces: http://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlserializernamespaces.aspx.

:

  XmlSerializer s = new XmlSerializer(typeof(OrderedItem));
  XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
  ns.Add("books", "http://www.cpandl.com");
  ns.Add("money", "http://www.cohowinery.com");    
  s.Serialize(new StreamWriter("a_output.xml"), i, ns);

Answer 3

XmlSerializerNamespaces, XmlNamespaceDeclarationsAttribute:

public class OrderedItem
{
  [XmlNamespaceDeclarations]
  public XmlSerializerNamespaces xmlns = new XmlSerializerNamespaces();

  ...
}

:

OrderedItem item = new OrderedItem();
item.xmlns.Add("books", "http://www.cpandl.com");
item.xmlns.Add("money", "http://www.cohowinery.com"); 
XmlSerializer serializer = new XmlSerializer(typeof(OrderedItem));
...

Answer 4

, , IXmlSerializable ( MSDN). , ( xml ).

This section has also been discussed here; see here for more information: The correct way to implement IXmlSerializable