>> .NET 2.0 - Chamada Web Services - Sem "Add Web References"

Segue exemplo de código para chamada a Web Services sem a necessidade de adição da referência web no projeto.

Basta passar para a função "CallWebServices" a URL, o nome da função e os parâmetros do Web Services.

Exemplo de uso da função:

using System.Xml;
using System.Collections;
using System.Collections.Generic;
using System.Text;

List<'Hashtable> oParams = new List<'Hashtable>();
Hashtable ht1 = new Hashtable();
ht1.Add("paramName", "productid");
ht1.Add("paramValue", "413D080B-09A7-DB11-89C7-0016356BE094");
oParams.Add(ht1);

string xml = CallWebServices("http://localhost/MyWS/product.asmx", "GetProductPriceList", oParams);

public static string CallWebServices(string url, string functionName, List<'Hashtable> oParams)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Credentials = System.Net.CredentialCache.DefaultCredentials;
request.Headers.Add("SOAPAction", "\"http://tempuri.org/" + functionName + "\"");
request.Method = "POST";
request.ContentType = "text/xml; charset=utf-8";
request.Accept = "text/xml";
request.Timeout = 10000;
Stream requestStream = request.GetRequestStream();
string soapEnvelope = "";
soapEnvelope += " soapEnvelope += " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"";
soapEnvelope += " xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"";
soapEnvelope += " xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">";
soapEnvelope += " ";
soapEnvelope += " <" + functionName + " xmlns=\"http://tempuri.org/\">";
if (oParams.Count > 0)
{
Boolean hashListOk = (oParams[0].Contains("paramName") && oParams[0].Contains("paramValue"));
if (!hashListOk) return string.Empty;
foreach (Hashtable ht in oParams)
{
soapEnvelope += "<" + ht["paramName"].ToString() + ">" + ht["paramValue"].ToString() + "";
}
}
soapEnvelope += " ";
soapEnvelope += " ";
soapEnvelope += " ";
// Convert the string into a byte array.
ASCIIEncoding encoder = new ASCIIEncoding();
byte[] ByteArray = encoder.GetBytes(soapEnvelope);
// Write data to the stream.
requestStream.Write(ByteArray, 0, ByteArray.Length);
requestStream.Flush();
requestStream.Close();
StreamReader esr = null;
string result = string.Empty;
try
{
esr = new StreamReader(request.GetResponse().GetResponseStream());
result = esr.ReadToEnd();
}
catch (System.Web.Services.Protocols.SoapException ex)
{
string x = ex.Detail.InnerText;
}
catch (Exception ex)
{
string x = ex.Message;
}
return result;
}