c# - WCF IClientMessageInspector.BeforeSendRequest modify request -

i'm trying modify request in wcf service.

public object beforesendrequest(ref message request, iclientchannel channel) {     string xmlrequest = request.tostring();      xdocument xdoc = xdocument.parse(xmlrequest);      //some request modifications     //here have xml in want send      request = message.createmessage(request.version, request.headers.action, whathere?);     request.headers.clear();                  return null; } 

but don't know can set in createmessage or maybe different way set xml request.

you can pass xmlreader object representing modified message. below example taken article how inspect , modify wcf message via custom messageinspector.

public object beforesendrequest(ref system.servicemodel.channels.message request, system.servicemodel.iclientchannel channel) {     console.writeline("====simplemessageinspector+beforesendrequest called=====");      //modify request send client(only customize message body)     request = transformmessage2(request);      return null; }  //only read , modify message body part private message transformmessage2(message oldmessage) {     message newmessage = null;      //load old message xml     messagebuffer msgbuf = oldmessage.createbufferedcopy(int.maxvalue);      message tmpmessage = msgbuf.createmessage();     xmldictionaryreader xdr = tmpmessage.getreaderatbodycontents();      xmldocument xdoc = new xmldocument();     xdoc.load(xdr);     xdr.close();      //transform xmldocument     xmlnamespacemanager nsmgr = new xmlnamespacemanager(xdoc.nametable);     nsmgr.addnamespace("a", "urn:test:datacontracts");      xmlnode node = xdoc.selectsinglenode("//a:stringvalue", nsmgr);     if(node!= null) node.innertext = "[modified in simplemessageinspector]" + node.innertext;      memorystream ms = new memorystream();     xmlwriter xw = xmlwriter.create(ms);     xdoc.save(xw);     xw.flush();     xw.close();      ms.position = 0;     xmlreader xr = xmlreader.create(ms);      //create new message modified xml document     newmessage = message.createmessage(oldmessage.version, null,xr );     newmessage.headers.copyheadersfrom(oldmessage);     newmessage.properties.copyproperties(oldmessage.properties);      return newmessage; }