SoapExtensionAttribute Class

Definition

Namespace:

System.Web.Services.Protocols

Assembly:

System.Web.Services.dll

When overridden in a derived class, specifies a SOAP extension should run with an XML Web service method.

public ref class SoapExtensionAttribute abstract : Attribute

public abstract class SoapExtensionAttribute : Attribute

type SoapExtensionAttribute = class
    inherit Attribute

Public MustInherit Class SoapExtensionAttribute
Inherits Attribute

Inheritance

Object

Attribute

SoapExtensionAttribute

Examples

The following TraceExtensionAttribute class derives from SoapExtensionAttribute to support applying the attribute to an XML Web service method or a method in an XML Web service client proxy class. When applied to either, the TraceExtension SOAP extension runs with the method.

// Create a SoapExtensionAttribute for a SOAP extension that can be
// applied to an XML Web service method.

[AttributeUsage(AttributeTargets::Method)]
public ref class TraceExtensionAttribute: public SoapExtensionAttribute
{
private:
   String^ myFilename;
   int myPriority;

public:

   // Set the name of the log file were SOAP messages will be stored.
   TraceExtensionAttribute()
      : SoapExtensionAttribute()
   {
      myFilename = "C:\\logClient.txt";
   }

   property Type^ ExtensionType 
   {
      // Return the type of 'TraceExtension' class.
      virtual Type^ get() override
      {
         return TraceExtension::typeid;
      }
   }

   property int Priority 
   {
      // User can set priority of the 'SoapExtension'.
      virtual int get() override
      {
         return myPriority;
      }

      virtual void set( int value ) override
      {
         myPriority = value;
      }
   }

   property String^ Filename 
   {
      String^ get()
      {
         return myFilename;
      }

      void set( String^ value )
      {
         myFilename = value;
      }
   }
};

// Create a SoapExtensionAttribute for a SOAP extension that can be
// applied to an XML Web service method.
[AttributeUsage(AttributeTargets.Method)]
public class TraceExtensionAttribute : SoapExtensionAttribute {

    private string myFilename;
    private int myPriority;

    // Set the name of the log file were SOAP messages will be stored.
    public TraceExtensionAttribute() : base()
    {
        myFilename = "C:\\logClient.txt";
    }

    // Return the type of 'TraceExtension' class.
    public override Type ExtensionType
    {
        get
        {
            return typeof(TraceExtension);
        }
    }

    // User can set priority of the 'SoapExtension'.
    public override int Priority
    {
        get
        {
            return myPriority;
        }
        set
        {
            myPriority = value;
        }
    }

    public string Filename
    {
        get
        {
            return myFilename;
        }
        set
        {
            myFilename = value;
        }
    }
}

' Create a SoapExtensionAttribute for a SOAP extension that can be
' applied to an XML Web service method.
<AttributeUsage(AttributeTargets.Method)> _
Public Class TraceExtensionAttribute
    Inherits SoapExtensionAttribute
    
    Private m_filename As String = "c:\log.txt"
    Private m_priority As Integer

   ' Return the type of 'TraceExtension' class.
    Public Overrides ReadOnly Property ExtensionType() As Type
        Get
            Return GetType(TraceExtension)
        End Get
    End Property

   ' User can set priority of the 'TraceExtension'.
    Public Overrides Property Priority() As Integer
        Get
            Return m_priority
        End Get
        Set(ByVal Value As Integer)
            m_priority = value
        End Set
    End Property

    Public Property Filename() As String
        Get
            Return m_filename
        End Get
        Set(ByVal Value As String)
            m_filename = value
        End Set
    End Property
End Class

Remarks

XML Web service methods created using ASP.NET can be configured to run with a SOAP extension by applying an attribute to the XML Web service method. When a custom extension attribute is added to an XML Web service method or a method on a client proxy class, ASP.NET invokes the associated extension at the appropriate time. An extension attribute is a custom attribute class deriving from SoapExtensionAttribute. Derived attributes must override the ExtensionType property to return the type of extension that is associated with the attribute.

Constructors

SoapExtensionAttribute()

Initializes a new instance of the SoapExtensionAttribute class.

Properties

ExtensionType	When overridden in a derived class, gets the Type of the SOAP extension.
Priority	When overridden in a derived class, gets or set the priority of the SOAP extension.
TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)

Methods

Equals(Object)	Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute)
GetHashCode()	Returns the hash code for this instance. (Inherited from Attribute)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsDefaultAttribute()	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute)
Match(Object)	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)

Explicit Interface Implementations

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)	Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)	Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32)	Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)	Provides access to properties and methods exposed by an object. (Inherited from Attribute)

See also

• SoapExtension
• SoapMessage