Request & Response Windows Phone - windows-phone-7

Question

I need to send request to server appending xml data as below to the url of the server
<User>
<MobileNumber>xxxxxxxxxx</MobileNumber>
<UserAgent>yyyyy</UserAgent>
</User>
I will get back response as follows
<User>
<MobileNumber>xxxxxxxxxx</MobileNumber>
<ModelId>zzzzzz</ModelId>
<AuthKey>aaaaaaaaa</AuthKey>
<UserAgent>yyyyy</UserAgent>
</User>
I want to parse the recieved xml data
What is the proper way to do this in Windows Phone(7)? first request the url with xml and then receive xml
I am new to windows phone development
what classes should be used??
I am very confused in -
WebClient
WebRequest
WebResponse
HttpWebRequest
HttpWebResponse
Edit: I tried the following code to send request, how do I receive the response??
private void Upload()
{
WebClient webClient = new WebClient();
webClient.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
var uri = new Uri("xxxxxxxxxx", UriKind.Absolute);
StringBuilder postData = new StringBuilder();
postData.AppendFormat("{0}={1}", "MobileNumber", HttpUtility.UrlEncode("yyyyyyyyy"));
postData.AppendFormat("&{0}={1}", "UserAgent", HttpUtility.UrlEncode("WP7"));
webClient.Headers[HttpRequestHeader.ContentLength] = postData.Length.ToString();
webClient.UploadStringCompleted += new UploadStringCompletedEventHandler(webClient_UploadStringCompleted);
webClient.UploadProgressChanged += webClient_UploadProgressChanged;
webClient.UploadStringAsync(uri, "POST", postData.ToString());
}

Answer 1

Try the following steps
Step 1: add the namespace using System.Net;
Step 2:
public void Upload()
{
WebRequest webRequest;
webRequest = WebRequest.Create(Url + Mobile_No + Request);
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.BeginGetRequestStream(newAsyncCallback(GetRequestStreamCallback), webRequest);
}
Step 3:
public void GetRequestStreamCallback(IAsyncResult asynchronousResult)
{
webRequest = (HttpWebRequest)asynchronousResult.AsyncState;
Stream postStream = webRequest.EndGetRequestStream(asynchronousResult);
string postData = "Test";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
webRequest.BeginGetResponse(new AsyncCallback(GetResponseCallback), webRequest);
}
Step 4 :
public void GetResponseCallback(IAsyncResult asynchronousResult)
{
try
{
HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState;
HttpWebResponse response;
response = (HttpWebResponse)webRequest.EndGetResponse(asynchronousResult);
Stream streamResponse = response.GetResponseStream();
StreamReader streamReader = new StreamReader(streamResponse);
var Response = streamReader.ReadToEnd();
streamResponse.Close();
streamReader.Close();
response.Close();
if (Response == "")
{
//show some error msg to the user
}
else
{
//Your response will be available in "Response"
}
}
catch (WebException)
{
//error
}
}
Check this now