C# – Client to send SOAP request and receive response


Trying to create a C# client (will be developed as a Windows service) that sends SOAP requests to a web service (and gets the results).

From this question I saw this code:

protected virtual WebRequest CreateRequest(ISoapMessage soapMessage)
    var wr = WebRequest.Create(soapMessage.Uri);
    wr.ContentType = "text/xml;charset=utf-8";
    wr.ContentLength = soapMessage.ContentXml.Length;

    wr.Headers.Add("SOAPAction", soapMessage.SoapAction);
    wr.Credentials = soapMessage.Credentials;
    wr.Method = "POST";
    wr.GetRequestStream().Write(Encoding.UTF8.GetBytes(soapMessage.ContentXml), 0, soapMessage.ContentXml.Length);

    return wr;

public interface ISoapMessage
    string Uri { get; }
    string ContentXml { get; }
    string SoapAction { get; }
    ICredentials Credentials { get; }

Looks nice, anyone knows how to use it and if it is the best practice?

Best Solution

I normally use another way to do the same

using System.Xml;
using System.Net;
using System.IO;

public static void CallWebService()
    var _url = "http://xxxxxxxxx/Service1.asmx";
    var _action = "http://xxxxxxxx/Service1.asmx?op=HelloWorld";

    XmlDocument soapEnvelopeXml = CreateSoapEnvelope();
    HttpWebRequest webRequest = CreateWebRequest(_url, _action);
    InsertSoapEnvelopeIntoWebRequest(soapEnvelopeXml, webRequest);

    // begin async call to web request.
    IAsyncResult asyncResult = webRequest.BeginGetResponse(null, null);

    // suspend this thread until call is complete. You might want to
    // do something usefull here like update your UI.

    // get the response from the completed web request.
    string soapResult;
    using (WebResponse webResponse = webRequest.EndGetResponse(asyncResult))
        using (StreamReader rd = new StreamReader(webResponse.GetResponseStream()))
            soapResult = rd.ReadToEnd();

private static HttpWebRequest CreateWebRequest(string url, string action)
    HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
    webRequest.Headers.Add("SOAPAction", action);
    webRequest.ContentType = "text/xml;charset=\"utf-8\"";
    webRequest.Accept = "text/xml";
    webRequest.Method = "POST";
    return webRequest;

private static XmlDocument CreateSoapEnvelope()
    XmlDocument soapEnvelopeDocument = new XmlDocument();
    @"<SOAP-ENV:Envelope xmlns:SOAP-ENV=""http://schemas.xmlsoap.org/soap/envelope/"" 
            <HelloWorld xmlns=""http://tempuri.org/"" 
                <int1 xsi:type=""xsd:integer"">12</int1>
                <int2 xsi:type=""xsd:integer"">32</int2>
    return soapEnvelopeDocument;

private static void InsertSoapEnvelopeIntoWebRequest(XmlDocument soapEnvelopeXml, HttpWebRequest webRequest)
    using (Stream stream = webRequest.GetRequestStream())
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