Begin Example with Override Encoded SOAP XML Serialization

The process for overriding XML serialization of objects as SOAP messages is similar to the process for overriding standard XML serialization. For information about overriding standard XML serialization, see How to: Specify an Alternate Element Name for an XML Stream.

To override serialization of objects as SOAP messages

1. Create an instance of the SoapAttributeOverrides class.

2. Create a SoapAttributes for each class member that is being serialized.

3. Create an instance of one or more of the attributes that affect XML serialization, as appropriate, to the member being serialized. For more information, see "Attributes That Control Encoded SOAP Serialization".

4. Set the appropriate property of SoapAttributes to the attribute created in step 3.

5. Add SoapAttributes to SoapAttributeOverrides.

6. Create an XmlTypeMapping using the SoapAttributeOverrides. Use theSoapReflectionImporter.ImportTypeMapping method.

7. Create an XmlSerializer using XmlTypeMapping.

8. Serialize or deserialize the object.

Example

The following code example serializes a file in two ways: first, without overriding the XmlSerializer class's behavior, and second, by overriding the behavior. The example contains a class named Group with several members. Various attributes, such as the SoapElementAttribute, have been applied to class members. When the class is serialized with the SerializeOriginal method, the attributes control the SOAP message content. When the SerializeOverride method is called, the behavior of the XmlSerializeris overridden by creating various attributes and setting the properties of a SoapAttributes to those attributes (as appropriate).

using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using System.Xml.Schema;

public class Group
{
    [SoapAttribute (Namespace = "http://www.cpandl.com")]
    public string GroupName;
    
    [SoapAttribute(DataType = "base64Binary")]
    public Byte [] GroupNumber;

    [SoapAttribute(DataType = "date", AttributeName = "CreationDate")]
    public DateTime Today;
    [SoapElement(DataType = "nonNegativeInteger", ElementName = "PosInt")]
    public string PostitiveInt;
    // This is ignored when serialized unless it is overridden.
    [SoapIgnore] 
    public bool IgnoreThis;

    public GroupType Grouptype;
    
    [SoapInclude(typeof(Car))]
    public Vehicle myCar(string licNumber)
    {
        Vehicle v;
        if(licNumber == "")
            {
                v = new Car();
            v.licenseNumber = "!!!!!!";
        }
        else
        {
            v = new Car();
            v.licenseNumber = licNumber;
        }
        return v;
    }
}

public abstract class Vehicle
{
    public string licenseNumber;
    public DateTime makeDate;
}

public class Car: Vehicle
{
}

public enum GroupType
{
    // These enums can be overridden.
    small,
    large
}
    
public class Run
{
    public static void Main()
    {
        Run test = new Run();
        test.SerializeOriginal("SoapOriginal.xml");
        test.SerializeOverride("SoapOverrides.xml");
        test.DeserializeOriginal("SoapOriginal.xml");
        test.DeserializeOverride("SoapOverrides.xml");
    
    }
    public void SerializeOriginal(string filename)
    {
        // Creates an instance of the XmlSerializer class.
        XmlTypeMapping myMapping = 
        (new SoapReflectionImporter().ImportTypeMapping(
        typeof(Group)));
        XmlSerializer mySerializer =  
        new XmlSerializer(myMapping);

        // Writing the file requires a TextWriter.
        TextWriter writer = new StreamWriter(filename);

        // Creates an instance of the class that will be serialized.
        Group myGroup = new Group();

        // Sets the object properties.
        myGroup.GroupName = ".NET";

        Byte [] hexByte = new Byte[2]{Convert.ToByte(100),
        Convert.ToByte(50)};
        myGroup.GroupNumber = hexByte;

        DateTime myDate = new DateTime(2002,5,2);
        myGroup.Today = myDate;

        myGroup.PostitiveInt= "10000";
        myGroup.IgnoreThis=true;
        myGroup.Grouptype= GroupType.small;
        Car thisCar =(Car)  myGroup.myCar("1234566");

        // Prints the license number just to prove the car was created.
        Console.WriteLine("License#: " + thisCar.licenseNumber + "\n");

        // Serializes the class and closes the TextWriter.
        mySerializer.Serialize(writer, myGroup);
        writer.Close();
    }

    public void SerializeOverride(string filename)
    {
        // Creates an instance of the XmlSerializer class
        // that overrides the serialization.
        XmlSerializer overRideSerializer = CreateOverrideSerializer();

        // Writing the file requires a TextWriter.
        TextWriter writer = new StreamWriter(filename);

        // Creates an instance of the class that will be serialized.
        Group myGroup = new Group();

        // Sets the object properties.
        myGroup.GroupName = ".NET";

        Byte [] hexByte = new Byte[2]{Convert.ToByte(100),
        Convert.ToByte(50)};
        myGroup.GroupNumber = hexByte;

        DateTime myDate = new DateTime(2002,5,2);
        myGroup.Today = myDate;


        myGroup.PostitiveInt= "10000";
        myGroup.IgnoreThis=true;
        myGroup.Grouptype= GroupType.small;
        Car thisCar =(Car)  myGroup.myCar("1234566");

        // Serializes the class and closes the TextWriter.
        overRideSerializer.Serialize(writer, myGroup);
         writer.Close();
    }

    public void DeserializeOriginal(string filename)
    {
        // Creates an instance of the XmlSerializer class.
        XmlTypeMapping myMapping = 
        (new SoapReflectionImporter().ImportTypeMapping(
        typeof(Group)));
        XmlSerializer mySerializer =  
        new XmlSerializer(myMapping);

        TextReader reader = new StreamReader(filename);

        // Deserializes and casts the object.
        Group myGroup; 
        myGroup = (Group) mySerializer.Deserialize(reader);

        Console.WriteLine(myGroup.GroupName);
        Console.WriteLine(myGroup.GroupNumber[0]);
        Console.WriteLine(myGroup.GroupNumber[1]);
        Console.WriteLine(myGroup.Today);
        Console.WriteLine(myGroup.PostitiveInt);
        Console.WriteLine(myGroup.IgnoreThis);
        Console.WriteLine();
    }

    public void DeserializeOverride(string filename)
    {
        // Creates an instance of the XmlSerializer class.
        XmlSerializer overRideSerializer = CreateOverrideSerializer();
        // Reading the file requires a TextReader.
        TextReader reader = new StreamReader(filename);

        // Deserializes and casts the object.
        Group myGroup; 
        myGroup = (Group) overRideSerializer.Deserialize(reader);

        Console.WriteLine(myGroup.GroupName);
        Console.WriteLine(myGroup.GroupNumber[0]);
        Console.WriteLine(myGroup.GroupNumber[1]);
        Console.WriteLine(myGroup.Today);
        Console.WriteLine(myGroup.PostitiveInt);
        Console.WriteLine(myGroup.IgnoreThis);
    }

    private XmlSerializer CreateOverrideSerializer()
    {
        SoapAttributeOverrides mySoapAttributeOverrides = 
        new SoapAttributeOverrides();
        SoapAttributes soapAtts = new SoapAttributes();

        SoapElementAttribute mySoapElement = new SoapElementAttribute();
        mySoapElement.ElementName = "xxxx";
        soapAtts.SoapElement = mySoapElement;
        mySoapAttributeOverrides.Add(typeof(Group), "PostitiveInt", 
        soapAtts);

        // Overrides the IgnoreThis property.
        SoapIgnoreAttribute myIgnore = new SoapIgnoreAttribute();
        soapAtts = new SoapAttributes();
        soapAtts.SoapIgnore = false;      
        mySoapAttributeOverrides.Add(typeof(Group), "IgnoreThis", 
        soapAtts);

        // Overrides the GroupType enumeration.
        soapAtts = new SoapAttributes();
        SoapEnumAttribute xSoapEnum = new SoapEnumAttribute();
        xSoapEnum.Name = "Over1000";
        soapAtts.SoapEnum = xSoapEnum;

        // Adds the SoapAttributes to the 
        // mySoapAttributeOverridesrides.
        mySoapAttributeOverrides.Add(typeof(GroupType), "large", 
        soapAtts);

        // Creates a second enumeration and adds it.
        soapAtts = new SoapAttributes();
        xSoapEnum = new SoapEnumAttribute();
        xSoapEnum.Name = "ZeroTo1000";
        soapAtts.SoapEnum = xSoapEnum;
        mySoapAttributeOverrides.Add(typeof(GroupType), "small", 
        soapAtts);

        // Overrides the Group type.
        soapAtts = new SoapAttributes();
        SoapTypeAttribute soapType = new SoapTypeAttribute();
        soapType.TypeName = "Team";
        soapAtts.SoapType = soapType;
        mySoapAttributeOverrides.Add(typeof(Group),soapAtts);

        // Creates an XmlTypeMapping that is used to create an instance 
        // of the XmlSerializer class. Then returns the XmlSerializer.
        XmlTypeMapping myMapping = (new SoapReflectionImporter(
        mySoapAttributeOverrides)).ImportTypeMapping(typeof(Group));
    
        XmlSerializer ser = new XmlSerializer(myMapping);
        return ser;
    }
}

Attributes That Control Encoded SOAP Serialization 

The World Wide Web Consortium (www.w3.org) document named "Simple Object Access Protocol (SOAP) 1.1" contains an optional section (section 5) that describes how SOAP parameters can be encoded. To conform to section 5 of the specification, you must use a special set of attributes found in the System.Xml.Serialization namespace. Apply those attributes as appropriate to classes and members of classes, and then use the XmlSerializer to serialize instances of the class or classes.

The following table shows the attributes, where they can be applied, and what they do. For more information about using these attributes to control XML serialization, see How to: Serialize an Object as a SOAP-Encoded XML Stream and How to: Override Encoded SOAP XML Serialization.

For more information about attributes, see Extending Metadata Using Attributes.

 

Attribute	Applies to	Specifies
SoapAttributeAttribute	Public field, property, parameter, or return value.	The class member will be serialized as an XML attribute.
SoapElementAttribute	Public field, property, parameter, or return value.	The class will be serialized as an XML element.
SoapEnumAttribute	Public field that is an enumeration identifier.	The element name of an enumeration member.
SoapIgnoreAttribute	Public properties and fields.	The property or field should be ignored when the containing class is serialized.
SoapIncludeAttribute	Public-derived class declarations and public methods for Web Services Description Language (WSDL) documents.	The type should be included when generating schemas (to be recognized when serialized).
SoapTypeAttribute	Public class declarations.	The class should be serialized as an XML type.