System.ServiceModel.Channels.MessageHeader Error

I'm trying to get the following to work on my machine but I get an error (Cannot create an instance of the abstract class or interface 'System.ServiceModel.Channels.MessageHeader')

using System;
using System.IO;
using System.Reflection;

namespace com.companyname.business

/// <summary>
/// Summary description for SessionCreateRQClient.
/// </summary>
class SessionCreateRQClient

/// <summary>
/// The main entry point.
/// </summary>
[STAThread]
static void Main(string args)

try

// Set user information, including security credentials and the IPCC.
string username = "user";
string password = "password";
string ipcc = "IPCC";
string domain = "DEFAULT";

string temp = Environment.GetEnvironmentVariable("tmp"); // Get temp directory
string PropsFileName = temp + "/session.properties"; // Define dir and file name
DateTime dt = DateTime.UtcNow;
string tstamp = dt.ToString("s") + "Z";

//Create the message header and provide the conversation ID.
MessageHeader msgHeader = new MessageHeader();
msgHeader.ConversationId = "TestSession"; // Set the ConversationId

From from = new From();
PartyId fromPartyId = new PartyId();
PartyId fromPartyIdArr = new PartyId[1];
fromPartyId.Value = "WebServiceClient";
fromPartyIdArr[0] = fromPartyId;
from.PartyId = fromPartyIdArr;
msgHeader.From = from;

To to = new To();
PartyId toPartyId = new PartyId();
PartyId toPartyIdArr = new PartyId[1];
toPartyId.Value = "WebServiceSupplier";
toPartyIdArr[0] = toPartyId;
to.PartyId = toPartyIdArr;
msgHeader.To = to;

//Add the value for eb:CPAId, which is the IPCC.
//Add the value for the action code of this Web service, SessionCreateRQ.

msgHeader.CPAId = ipcc;
msgHeader.Action = "SessionCreateRQ";
Service service = new Service();
service.Value = "SessionCreate";
msgHeader.Service = service;

MessageData msgData = new MessageData();
msgData.MessageId = "mid:20001209-133003-2333@clientofsabre.com1";
msgData.Timestamp = tstamp;
msgHeader.MessageData = msgData;

Security security = new Security();
SecurityUsernameToken securityUserToken = new SecurityUsernameToken();
securityUserToken.Username = username;
securityUserToken.Password = password;
securityUserToken.Organization = ipcc;
securityUserToken.Domain = domain;
security.UsernameToken = securityUserToken;


SessionCreateRQ req = new SessionCreateRQ();
SessionCreateRQPOS pos = new SessionCreateRQPOS();
SessionCreateRQPOSSource source = new SessionCreateRQPOSSource();
source.PseudoCityCode = ipcc;
pos.Source = source;
req.POS = pos;

SessionCreateRQService serviceObj = new SessionCreateRQService();
serviceObj.MessageHeaderValue = msgHeader;
serviceObj.SecurityValue = security;


SessionCreateRS resp = serviceObj.SessionCreateRQ(req); // Send the request

if (resp.Errors != null && resp.Errors.Error != null)

Console.WriteLine("Error : " + resp.Errors.Error.ErrorInfo.Message);


else

msgHeader = serviceObj.MessageHeaderValue;
security = serviceObj.SecurityValue;

Console.WriteLine("**********************************************");
Console.WriteLine("Response of SessionCreateRQ service");
Console.WriteLine("BinarySecurityToken returned : " + security.BinarySecurityToken);
Console.WriteLine("**********************************************");
string ConvIdLine = "convid="+msgHeader.ConversationId; // ConversationId to a string
string TokenLine = "securitytoken="+security.BinarySecurityToken; // BinarySecurityToken to a string
string ipccLine = "ipcc="+ipcc; // IPCC to a string

File.Delete(PropsFileName); // Clean up
TextWriter tw = new StreamWriter(PropsFileName); // Create & open the file
tw.WriteLine(DateTime.Now); // Write the date for reference
tw.WriteLine(TokenLine); // Write the BinarySecurityToken
tw.WriteLine(ConvIdLine); // Write the ConversationId
tw.WriteLine(ipccLine); // Write the IPCC
tw.Close();

//Console.Read();



catch(Exception e)

Console.WriteLine("Exception Message : " + e.Message );
Console.WriteLine("Exception Stack Trace : " + e.StackTrace);
Console.Read();








I have added the reference System.ServiceModel and the lines:

System.ServiceModel

using System.ServiceModel;
using System.ServiceModel.Channels;


but I continue to get that error when trying to compile --

Cannot create an instance of the abstract class or interface 'System.ServiceModel.Channels.MessageHeader'

Cannot create an instance of the abstract class or interface 'System.ServiceModel.Channels.MessageHeader'

I am using Microsoft Visual Studio 2008
Version 9.0.21022.8 RTM
Microsoft .NET Framework
Version 3.5 SP1
Professional Edition

Is there another reference I have to add? Or a dll to move over?

I wonder was the code above written for Framework 2.0 only?

Thanks for your help.

1 Answer
1

The error message is correct, you cannot create an instance of that class, it is declared abstract.

http://msdn.microsoft.com/en-us/library/system.servicemodel.channels.messageheader.aspx

See if the static method MessageHeader.CreateHeader will work for you. Note there is several overloads, so pick the best one for you.

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.