public string urlAddress = "http://web地址/client/login?account=1&password=2&phoneType=3&deviceToken=1";

public MainPage()
{
InitializeComponent();

// Set the data context of the listbox control to the sample data
DataContext = App.ViewModel;
this.Loaded += new RoutedEventHandler(MainPage_Loaded);

doSend();

｝

public void doSend()
{
StringBuilder completeUrl = new StringBuilder(urlAddress);
objRequest = (HttpWebRequest)WebRequest.Create(urlAddress.ToString());
objRequest.ContentType = "application/x-www-form-urlencoded";
objRequest.Method = "POST";
//Adding headers
objRequest.Headers["Header"] = "Your Value";
objRequest.Headers["Content-Language"] = "en-US";

myRequestData = "Your Request data";

//Begins the asynchronous request
objRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), objRequest);
}

private static void GetRequestStreamCallback(IAsyncResult asyncResult)
{
HttpWebRequest objHttpWebRequest = (HttpWebRequest)asyncResult.AsyncState;
// End the operation
Stream postStream = objHttpWebRequest.EndGetRequestStream(asyncResult);
// Convert the string into a byte array.
byte[] byteArray = Encoding.UTF8.GetBytes(myRequestData);
// Write to the request stream.
postStream.Write(byteArray, 0, myRequestData.Length);
postStream.Close();

// Start the asynchronous operation to get the response
objHttpWebRequest.BeginGetResponse(new AsyncCallback(GetResponseCallback), objHttpWebRequest);
//request.BeginGetResponse(new AsyncCallback(GetResponseCallback), objHttpWebRequest);
}

private static void GetResponseCallback(IAsyncResult asyncResult)
{
HttpWebRequest objHttpWebRequest = (HttpWebRequest)asyncResult.AsyncState;
HttpWebResponse objHttpWebResponse = (HttpWebResponse)objHttpWebRequest.EndGetResponse(asyncResult);
Stream objStreamResponse = objHttpWebResponse .GetResponseStream();
StreamReader objStreamReader = new StreamReader(objStreamResponse );
string responseString = objStreamReader.ReadToEnd(); // Got response here
//MessageBox.Show("RESPONSE :" + responseString);
// Close the stream object
objStreamResponse .Close();
objStreamReader.Close();
objHttpWebResponse.Close();
}
}
}