System.Xml.Serialization.SoapIncludeAttribute Class

Summary

Allows the XmlSerializer to recognize a type when it serializes or deserializes an object as encoded SOAP XML.

C# Syntax:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Method)] public class SoapIncludeAttribute : Attribute

The SoapIncludeAttribute class belongs to a family of attributes that controls how the XmlSerializer serializes, or deserializes, an object as encoded SOAP XML . The resulting XML conforms to section 5 of the World Wide Web Consortium (www.w3.org) document, "Simple Object Access Protocol (SOAP) 1.1". For a complete list of similar attributes, see the conceptual topic at MSDN: attributesthatcontrolsoapencodedserialization.

To serialize an object as an encoded SOAP message, you must construct the XmlSerializer using an XmlTypeMapping created with the SoapReflectionImporter.ImportTypeMapping method of the SoapReflectionImporter class.

When applying the SoapIncludeAttribute, specify the Type of the derived class. When the XmlSerializer serializes objects that include both the base and the derived classes, it can then recognize both object types.

You can use the SoapIncludeAttribute to include derived classes in service description documents that are written in the Web Services Description Language (WSDL). For example, if a method returns an Object, apply the SoapIncludeAttribute to the method and specify the actual types that should be returned.

For more information about WSDL, see World Wide Web Consortium (www.w3.org) specification, "Web Services Description Language (WSDL) 1.1".

For more information about using attributes, see the conceptual topic at MSDN: extendingmetadatausingattributes.

The following example applies the SoapIncludeAttribute twice to an XML Web service method. The method returns an object of type Vehicle (a base class). The SoapIncludeAttribute allows the method to return instances of classes derived from the Vehicle class.

<%@ WebService Language="C#" Class="Test" %>
 
using System;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Services.Description;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using System.Data;
 
public class Test : WebService {
   [WebMethod()]
   [return:XmlElement("MyTime", DataType="time")]
   public DateTime EchoString([XmlElement(DataType="string")] 
   string strval) {
        return DateTime.Now;
   }
 
   [WebMethod()]
   [SoapRpcMethod]
   [SoapInclude(typeof(Car)), SoapInclude(typeof(Bike))]
   public Vehicle Vehicle(string licenseNumber) {
      if (licenseNumber == "0") {
         Vehicle v = new Car();
         v.licenseNumber = licenseNumber;
         return v;
      }
      else if (licenseNumber == "1") {
          Vehicle v = new Bike();
          v.licenseNumber = licenseNumber;
          return v;
      }
      else {
         return null;
      }
   }
}
[XmlRoot("NewVehicle")] 
public abstract class Vehicle {
    public string licenseNumber;
    public DateTime make;
}
 
public class Car : Vehicle {
}
 
public class Bike : Vehicle {
}
   

    

System.Xml.Serialization Namespace

System.Xml.Serialization.SoapIncludeAttribute Member List:

Public Constructors

ctor #1

Initializes a new instance of the SoapIncludeAttribute class using the specified type.

Public Properties

Type	Read-write Gets or sets the type of the object that should be used when serializing or deserializing an object.
TypeId (inherited from System.Attribute)	Read-only See base class member description: System.Attribute.TypeId When implemented in a derived class, gets a unique identifier for this Attribute.

Public Methods

Equals (inherited from System.Object)	See base class member description: System.Object.Equals Derived from System.Object, the primary base class for all objects.
GetHashCode (inherited from System.Attribute)	See base class member description: System.Attribute.GetHashCode Returns the hash code for this instance.
GetType (inherited from System.Object)	See base class member description: System.Object.GetType Derived from System.Object, the primary base class for all objects.
IsDefaultAttribute (inherited from System.Attribute)	See base class member description: System.Attribute.IsDefaultAttribute When overridden in a derived class, returns an indication whether the value of this instance is the default value for the derived class.
Match (inherited from System.Attribute)	See base class member description: System.Attribute.Match When overridden in a derived class, returns a value indicating whether this instance equals a specified object.
ToString (inherited from System.Object)	See base class member description: System.Object.ToString Derived from System.Object, the primary base class for all objects.

Protected Methods

Finalize (inherited from System.Object)	See base class member description: System.Object.Finalize Derived from System.Object, the primary base class for all objects.
MemberwiseClone (inherited from System.Object)	See base class member description: System.Object.MemberwiseClone Derived from System.Object, the primary base class for all objects.

Hierarchy:

• System.Object
• System.Attribute
• System.Xml.Serialization.SoapIncludeAttribute

System.Xml.Serialization.SoapIncludeAttribute Member Details

Summary

Initializes a new instance of the SoapIncludeAttribute class using the specified type.

C# Syntax:

public SoapIncludeAttribute(    Type type );

type

The type of the object to include.

Apply multiple instances of the SoapIncludeAttribute to a field or property that returns either an array of objects, an ArrayList that contains a collection of objects, or an object that can return multiple types. Set the SoapIncludeAttribute.Type property for each type that you would like the field or property to contain.

The following example applies the SoapIncludeAttribute twice to an XML Web services method. The method returns an object of type Vehicle (a base class). The SoapIncludeAttribute allows the method to return instances of classes derived from the Vehicle class.

<%@ WebService Language="C#" Class="Test" %>
 
using System;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Services.Description;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using System.Data;
 
public class Test : WebService {
   [WebMethod()]
   [return:XmlElement("MyTime", DataType="time")]
   public DateTime EchoString([XmlElement(DataType="string")] 
   string strval) {
        return DateTime.Now;
   }
 
   [WebMethod()]
   [SoapRpcMethod]
   [SoapInclude(typeof(Car)), SoapInclude(typeof(Bike))]
   public Vehicle Vehicle(string licenseNumber) {
      if (licenseNumber == "0") {
         Vehicle v = new Car();
         v.licenseNumber = licenseNumber;
         return v;
      }
      else if (licenseNumber == "1") {
          Vehicle v = new Bike();
          v.licenseNumber = licenseNumber;
          return v;
      }
      else {
         return null;
      }
   }
}
[XmlRoot("NewVehicle")] 
public abstract class Vehicle {
    public string licenseNumber;
    public DateTime make;
}
 
public class Car : Vehicle {
}
 
public class Bike : Vehicle {
}
   

    

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Summary

Gets or sets the type of the object that should be used when serializing or deserializing an object.

C# Syntax:

public Type Type {get; set;}

Apply multiple instances of the SoapIncludeAttribute to a field or property that returns either an array of objects, an ArrayList that contains a collection of objects, or an object that can return multiple types. Set the SoapIncludeAttribute.Type property for each type that you would like the field or property to contain.

The following example applies the SoapIncludeAttribute twice to an XML Web services method. The method returns an object of type Vehicle (a base class). The SoapIncludeAttribute allows the method to return instances of classes derived from the Vehicle class.

<%@ WebService Language="C#" Class="Test" %>
 
using System;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Services.Description;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using System.Data;
 
public class Test : WebService {
   [WebMethod()]
   [return:XmlElement("MyTime", DataType="time")]
   public DateTime EchoString([XmlElement(DataType="string")] 
   string strval) {
        return DateTime.Now;
   }
 
   [WebMethod()]
   [SoapRpcMethod]
   [SoapInclude(typeof(Car)), SoapInclude(typeof(Bike))]
   public Vehicle Vehicle(string licenseNumber) {
      if (licenseNumber == "0") {
         Vehicle v = new Car();
         v.licenseNumber = licenseNumber;
         return v;
      }
      else if (licenseNumber == "1") {
          Vehicle v = new Bike();
          v.licenseNumber = licenseNumber;
          return v;
      }
      else {
         return null;
      }
   }
}
[XmlRoot("NewVehicle")] 
public abstract class Vehicle {
    public string licenseNumber;
    public DateTime make;
}
 
public class Car : Vehicle {
}
 
public class Bike : Vehicle {
}
   

    

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Inherited
See base class member description: System.Attribute.TypeId

Summary

When implemented in a derived class, gets a unique identifier for this Attribute.

C# Syntax:

public virtual object TypeId {get;}

As implemented, this identifier is merely the Type of the attribute. However, it is intended that the unique identifier be used to identify two attributes of the same type.

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Inherited
See base class member description: System.Object.Equals

C# Syntax:

public virtual bool Equals(    object obj );

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Object.Finalize

C# Syntax:

~SoapIncludeAttribute();

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Attribute.GetHashCode

Summary

Returns the hash code for this instance.

C# Syntax:

public override int GetHashCode();

Return Value:

A 32-bit signed integer hash code.

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Inherited
See base class member description: System.Object.GetType

C# Syntax:

public Type GetType();

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Attribute.IsDefaultAttribute

Summary

When overridden in a derived class, returns an indication whether the value of this instance is the default value for the derived class.

C# Syntax:

public virtual bool IsDefaultAttribute();

Return Value:

true if this instance is the default attribute for the class; otherwise, false.

The default implementation of this class returns false, and must be implemented in the derived class to be useful to that class.

The implementation of this method in a derived class compares the value of this instance to a standard, default value obtained by some means, then returns a Boolean value that indicates whether the value of this instance is equal to the standard. The standard value is typically coded as a constant in the implementation, or stored programmatically in a field used by the implementation.

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Inherited
See base class member description: System.Attribute.Match

Summary

When overridden in a derived class, returns a value indicating whether this instance equals a specified object.

C# Syntax:

public virtual bool Match(    object obj );

obj

An Object to compare with this instance of Attribute.

Return Value:

true if this instance equals obj; otherwise, false.

This method determines if one Attribute equals another. Its default implementation is the same as Attribute.Equals, which performs a value and reference comparison. Override this method to implement support for attribute values, such as flags or bitfields, that consist of components that are meaningful in themselves. For example, consider an attribute whose value is a binary field divided into a bitfield of flags. Two instances of this attribute have one flag in set in common while all the other flags differ. The Equal method cannot determine that the two instances have the same flag set, but the Match method can.

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Inherited
See base class member description: System.Object.MemberwiseClone

C# Syntax:

protected object MemberwiseClone();

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Object.ToString

C# Syntax:

public virtual string ToString();

For more information on members inherited from System.Object click on the link above.

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