Export (0) Print
Expand All

XmlIncludeAttribute Class

Allows the XmlSerializer to recognize a type when it serializes or deserializes an object.

System.Object
  System.Attribute
    System.Xml.Serialization.XmlIncludeAttribute

Namespace:  System.Xml.Serialization
Assembly:  System.Xml (in System.Xml.dll)

[AttributeUsageAttribute(AttributeTargets.Class|AttributeTargets.Struct|AttributeTargets.Method|AttributeTargets.Interface, AllowMultiple = true)]
public class XmlIncludeAttribute : Attribute

The XmlIncludeAttribute type exposes the following members.

  NameDescription
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsXmlIncludeAttributeInitializes a new instance of the XmlIncludeAttribute class.
Top

  NameDescription
Public propertySupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsTypeGets or sets the type of the object to include.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
Top

  NameDescription
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodSupported by the XNA FrameworkMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsToStringReturns a string that represents the current object. (Inherited from Object.)
Top

  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
Top

Use the XmlIncludeAttribute when you call the Serialize or Deserialize method of the XmlSerializer class.

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

You can use the XmlIncludeAttribute 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 XmlIncludeAttribute to the method and specify the actual types to return.

For more information on the WSDL, see "Web Services Description Language (WSDL) 1.1" at www.w3.org.

The following example shows three classes, two of which inherit from the third. The example applies the XmlIncludeAttribute to a method that returns an instance of one of the derived classes.

<%@ 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()]
   [XmlInclude(typeof(Car)), XmlInclude(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 {
}
   

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Show:
© 2014 Microsoft