// This actually calls the service to perform the tax calculation, and returns the calculation result.
public async Task<GetTaxResult> GetTax(GetTaxRequest req)
{
// Convert the request to XML
XmlSerializerNamespaces namesp = new XmlSerializerNamespaces();
namesp.Add(string.Empty, string.Empty);
XmlWriterSettings settings = new XmlWriterSettings {OmitXmlDeclaration = true};
XmlSerializer x = new XmlSerializer(req.GetType());
StringBuilder sb = new StringBuilder();
x.Serialize(XmlWriter.Create(sb, settings), req, namesp);
XmlDocument doc = new XmlDocument();
doc.LoadXml(sb.ToString());
// Call the service
Uri address = new Uri(_svcUrl + "tax/get");
var request = HttpHelper.CreateRequest(address, _accountNumber, _license);
request.Method = "POST";
request.ContentType = "text/xml";
//request.ContentLength = sb.Length;
Stream newStream = await request.GetRequestStreamAsync();
newStream.Write(Encoding.ASCII.GetBytes(sb.ToString()), 0, sb.Length);
GetTaxResult result = new GetTaxResult();
try
{
WebResponse response = await request.GetResponseAsync();
XmlSerializer r = new XmlSerializer(result.GetType());
result = (GetTaxResult) r.Deserialize(response.GetResponseStream());
}
catch (WebException ex)
{
XmlSerializer r = new XmlSerializer(result.GetType());
result = (GetTaxResult) r.Deserialize(((HttpWebResponse) ex.Response).GetResponseStream());
}
return result;
}
