Wcf/web Service Code

Using System;
Using System.CodeDom;
Using System.IO;
Using System.Text;
Using System.Web.Services.Configuration;
Using System.Web.Services.Description;
Using System.Web.Services.Protocols;
 
Using System.Xml.Serialization;  The Ymlattribute allows a developer to specify this YML SOAP//extension run on a per-method basis. 

The Disabled property//Turns reversing the XML in and off. [AttributeUsage (AttributeTargets.Method, Allowmultiple=false)] public class Ymlattribute:soapextensionattribute {in
  T priority = 0;
       
  BOOL disabled = FALSE;
  Public Ymlattribute (): this (false) {} public Ymlattribute (bool disabled) {this.disabled = disabled;
  public override Type ExtensionType {get {return typeof (Ymlextension);}
    public override int Priority {get {return Priority;}
  set {priority = value;}
    public bool Disabled {get {return Disabled;}
  set {disabled = value;} } public class Ymlextension:SoapExtension {bool disabled = false;
  Stream Oldstream;

  Stream Newstream; public override Object GetInitializer (LogicalMethodInfo methodInfo, Soapextensiona
    Ttribute attribute) {Ymlattribute attr = attribute as Ymlattribute; if (attr!= null) return attr.
       Disabled;
  return false;
  Override Object GetInitializer (Type servicetype) {return false; override void Initialize (object initializer) {if (initializer is Boolean) disabled = (BOOL) Initialize
  R Override Stream ChainStream (stream stream) {if (disabled) return base.
     ChainStream (stream);
     Oldstream = stream;
     Newstream = new MemoryStream ();
  return newstream;
    override void ProcessMessage (SoapMessage message) {if (disabled) return; Switch (message.
        Stage) {case SoapMessageStage.BeforeSerialize:Encode (message);
      Break Case SoapmessagesTage.
        AfterSerialize:newStream.Position = 0;
        Reverse (Newstream, oldstream);
      Break
        Case SoapMessageStage.BeforeDeserialize:Decode (message);
      Break
    Case SoapMessageStage.AfterDeserialize:break; } void Encode (SoapMessage message) {message.
  ContentType = "Text/yml"; } void Decode (SoapMessage message) {if (message). ContentType!= "Text/yml") throw new Exception ("Invalid content type:" + message.
   ContentType);
   Reverse (Oldstream, newstream);
   newstream.position = 0; Message.
  ContentType = "Text/xml";
    } void Reverse (stream from, stream to) {TextReader reader = new StreamReader (from);
    TextWriter writer = new StreamWriter (to);
    String line; while (line = reader.
      ReadLine ())!= null) {StringBuilder builder = new StringBuilder (); for (int i = line. Length-1; I >= 0; i--) {Builder.
      Append (Line[i]); } writer. WriteLine(Builder.
    ToString ()); } writer.
  Flush (); }//The Ymlreflector class is part of the YML SDFE;
It is//called during the service description generation process. public class Ymlreflector:soapextensionreflector {public override void ReflectMethod () {ProtocolReflector re
    Flector = Reflectioncontext; Ymlattribute attr = (ymlattribute) reflector.
    Method.getcustomattribute (typeof (Ymlattribute));  If the Ymlattribute has been applied to this WEB service//method, adds the XML defined in the ymloperationbinding
    Class.
      if (attr!= null) {ymloperationbinding yml = new ymloperationbinding (); Yml. Reverse =! (attr.
      Disabled); Reflector.
    OPERATIONBINDING.EXTENSIONS.ADD (YML); }}//The Ymlimporter class is part of the YML SDFE;  It is called at//a proxy class is generated for each Web service method the proxy//class communicates with. The class checks whether the service//description contains The XML this is SDFE adds to a service//description.
If it exists, then the ymlextension is applied to the//method in the proxy class. 
                                    public class Ymlimporter:soapextensionimporter {public override void ImportMethod (codeattributedeclarationcollection
   Metadata) {SoapProtocolImporter importer = ImportContext;
   Checks whether the XML specified in the ymloperationbinding are in//the service description. Ymloperationbinding yml = (ymloperationbinding) importer.
   OperationBinding.Extensions.Find (typeof (Ymloperationbinding));
     if (yml!= null) {//only applies the ymlattribute to the ' method ' when the XML should//is reversed. if (yml. Reverse) {codeattributedeclaration attr = new CodeAttributeDeclaration (typeof).
       FullName); attr.
       Arguments.add (New CodeAttributeArgument (New CodePrimitiveExpression (true)); Metadata.
     ADD (attr);
 }  }}//The Ymloperationbinding class is part of the YML SDFE;
It is the//class This is serialized to XML and placed in the service//description.
[Xmlformatextension ("Action", Ymloperationbinding.ymlnamespace, typeof (OperationBinding))] [Xmlformatextensionprefix ("Yml", Ymloperationbinding.ymlnamespace)] public class ymloperationbinding:
   servicedescriptionformatextension {private Boolean reverse;

   Public Const string ymlnamespace = "Http://www.contoso.com/yml";
     [XmlElement ("Reverse")] public Boolean Reverse {get {return Reverse;}
   set {reverse = value;}
 }
}