Post data from client to a web service (.asmx, .svc) in C#

If you want to post data from your web application to web service then use the below line of code and change it according your requirement.

ClientSection clientSettings = ConfigurationManager.GetSection("system.serviceModel/client") as ClientSection;

                string address = string.Empty;

                foreach(ChannelEndpointElement endpoint in clientSettings.Endpoints)

                {

                    if (endpoint.Name == "WarrantyXServiceSoap")

                    {

                        address = endpoint.Address.ToString();   

                        break;

                    }

                }

                if (!string.IsNullOrEmpty(address))

                {

                    HttpWebRequest request;

                    string url = WebService URL;

                    string action = "http://tempuri.org/MethodName";

                    request = (HttpWebRequest)WebRequest.Create(url);

                    request.Method = "POST"; // OR "GET" if you want to make a GET request 

                    request.ContentType = "text/xml; charset=utf-8";

                    request.Headers.Add("SOAPAction: " + action);

                    StringBuilder soapRequest = new StringBuilder("");

                    soapRequest.Append("http://www.w3.org/2001/XMLSchema-instance\

" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">");

                    soapRequest.Append("");

                    soapRequest.Append("http://tempuri.org/\

">");

// these are the parameters of web method to pass data from client machine

                    soapRequest.Append("" + _Name + "

");

                    soapRequest.Append("" + Convert.ToBase64String(_BinaryDoc) + "

");

                    soapRequest.Append("" + _ContentType + "

");

                    soapRequest.Append("" + _ID.ToString() + "

");

                    soapRequest.Append("

");

                    soapRequest.Append("

");

                    soapRequest.Append("

");

                    request.ContentLength = soapRequest.ToString().Length;

                    request.KeepAlive = false;

                    request.Timeout = System.Threading.Timeout.Infinite;

                    request.AllowWriteStreamBuffering = false;

                    request.ProtocolVersion = HttpVersion.Version10;

                    request.ServicePoint.ConnectionLeaseTimeout = 600000;

                    request.ServicePoint.MaxIdleTime = 600000;

                    request.Proxy = null;

                    request.ReadWriteTimeout = 600000;

                    request.Accept = "text/xml";

                    using (Stream requestStream = request.GetRequestStream())

                    {

                        using (StreamWriter requestStreamWriter = new StreamWriter(requestStream))

                        {

                            requestStreamWriter.Write(soapRequest.ToString());

                        }

                    }

                    string result = string.Empty;

                    using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())

                    {

                        StreamReader reader = new StreamReader(response.GetResponseStream());

                        result = reader.ReadToEnd();

                    }

                    var xDoc = XDocument.Parse(result);

                    _createdAnnotation = new Guid(xDoc.Root.Value);

                }