Using C# Service Reference with Proxy

Question

I am trying to use a ServiceReference in a C# project. The project is intended to test a connection. I have a customer who is trying to connect with a C# application to one web service of one of my colleagues. The connection can't be established and he is assuming that it is our own mistake.

I am trying to write now a simple C# project. Thats enough of story... now the Information needed.

1. The customer uses a Proxy server
2. I try to connect to this web service for testing reasons http://www.w3schools.com/webservices/tempconvert.asmx
3. I Use .Net Framework 4.0
4. My Project compiles into a Windows Forms application.

Here The source code of my Method:

    private void button2_Click(object sender, EventArgs e)
    {
        try
        {
            //Create Client
            ServiceReference1.TempConvertSoapClient client = new ServiceReference1.TempConvertSoapClient(@"TempConvertSoap",@"http://www.w3schools.com/webservices/tempconvert.asmx");
            if (client.ClientCredentials != null)
            {
                //Use Values which are typed in in the GUI
                string user = tbUser.Text;
                string password = tbPassword.Text;
                string domain = tbDomain.Text;

                //Check what information is used by the customer.
                if (!string.IsNullOrEmpty(user) && !string.IsNullOrEmpty(password) && !string.IsNullOrEmpty(domain))
                {
                    client.ClientCredentials.Windows.ClientCredential = new NetworkCredential(user, password, domain);
                }
                if (!string.IsNullOrEmpty(user) && !string.IsNullOrEmpty(password))
                {
                    client.ClientCredentials.Windows.ClientCredential = new NetworkCredential(user, password);
                }
            }
            //Oh nooo... no temperature typed in
            if (string.IsNullOrEmpty(tbFahrenheit.Text))
            {
                //GOOD BYE
                return;
            }
            //Use the webservice 
            string celsius =  client.FahrenheitToCelsius(tbFahrenheit.Text); //<-- Simple Calculation
            tbCelsius.Text = celsius;
        }
        catch(Exception ex) 
        {
            //Something 
            MessageBox.Show(ex.ToString());
        }

    }

Here is my Question: How can i set a proxy to this service reference or rather the client ? There is no property or setter for this purpose. I tried it with the ClientCredentials

Answer 1

Okay i found the answer myself. Hopefully it will help somebody ;).

This part creates a binding. This can later be used in the webservice

    private void button2_Click(object sender, EventArgs e)
    {
        BasicHttpBinding binding = new BasicHttpBinding("TempConvertSoap");

        if (!string.IsNullOrEmpty(tbProxy.Text))
        {
            binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;
            binding.Security.Transport.ProxyCredentialType = HttpProxyCredentialType.Basic;


            string proxy = string.Format("http://{0}", tbProxy.Text);
            if (!string.IsNullOrEmpty(tbPort.Text)) 
            {
               proxy = string.Format("{0}:{1}",proxy,tbPort.Text);
            }

            binding.UseDefaultWebProxy = false;
            binding.ProxyAddress = new Uri(proxy);


        }
        EndpointAddress endpoint = new EndpointAddress(@"http://www.w3schools.com/webservices/tempconvert.asmx");

Here begins the old part where i set the binding .

            try
        {
            //Create Client
            ServiceReference1.TempConvertSoapClient client = new ServiceReference1.TempConvertSoapClient(binding, endpoint);
            if (client.ClientCredentials != null)
            {
                //Use Values which are typed in in the GUI
                string user = tbUser.Text;
                string password = tbPassword.Text;
                string domain = tbDomain.Text;



                client.ClientCredentials.UserName.UserName = user;
                client.ClientCredentials.UserName.Password = password;
                client.ClientCredentials.Windows.ClientCredential.Domain = domain;

                //Check what information is used by the customer.
                if (!string.IsNullOrEmpty(user) && !string.IsNullOrEmpty(password) && !string.IsNullOrEmpty(domain))
                {
                    client.ClientCredentials.Windows.ClientCredential = new NetworkCredential(user, password, domain);
                }
                if (!string.IsNullOrEmpty(user) && !string.IsNullOrEmpty(password))
                {
                    client.ClientCredentials.Windows.ClientCredential = new NetworkCredential(user, password);
                }
            }
            //Oh nooo... no temperature typed in
            if (string.IsNullOrEmpty(tbFahrenheit.Text))
            {
                //GOOD BYE
                return;
            }
            //Use the webservice 

            //THIS ONE IS IMPORTANT
            System.Net.ServicePointManager.Expect100Continue = false;
            string celsius =  client.FahrenheitToCelsius(tbFahrenheit.Text); //<-- Simple Calculation
            tbCelsius.Text = celsius;
        }
        catch(Exception ex) 
        {
            //Something 
            tbCelsius.Text = ex.Message;
            MessageBox.Show(ex.ToString());
        }

    }

I used Squid as my proxy and use a firewall besides the proxy. After i configured it succesfully i encountered the error (417) Expectation failed. During the research i found a line of code which helped me to "resolve" this problem

System.Net.ServicePointManager.Expect100Continue = false;