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SoapExtensionAttribute Class

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

Namespace: System.Web.Services.Protocols
Assembly: System.Web.Services (in system.web.services.dll)

public abstract class SoapExtensionAttribute : Attribute
public abstract class SoapExtensionAttribute extends Attribute
public abstract class SoapExtensionAttribute extends Attribute
Not applicable.

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.

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 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.
/** @attribute AttributeUsage(AttributeTargets.Method)
 */
public class TraceExtensionAttribute extends SoapExtensionAttribute
{
    private String myFilename;
    private int myPriority;

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

    // Return the type of 'TraceExtension' class.
    public Type get_ExtensionType()
    {
        return TraceExtension.class.ToType();
    } //get_ExtensionType

    // User can set priority of the 'SoapExtension'.
    public int get_Priority()
    {
        return myPriority;
    } //get_Priority

    public void set_Priority(int value)
    {
        myPriority = value;
    } //set_Priority

    public String get_Filename()
    {
        return myFilename;
    } //get_Filename

    public void set_Filename(String value)
    {
        myFilename = value;
    } //set_Filename
} //TraceExtensionAttribute

System.Object
   System.Attribute
    System.Web.Services.Protocols.SoapExtensionAttribute

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

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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