Making a HTTP request and listening its completion in Windows Phone
This article include how to make http request using WebClient and listening requst completion using EventHandler.
Article Metadata
Introduction
HTTPManeger.cs
public class HTTPManager
{
private WebClient webdownloader;
private Uri uri;
public event EventHandler WebRequestCompleted;
public HTTPManager(string url)
{
webdownloader = new WebClient();
uri = new Uri(url);
}
public void MakeRequest()
{
webdownloader.DownloadStringCompleted += new DownloadStringCompletedEventHandler(DataDownloaded);
webdownloader.DownloadStringAsync(uri);
}
public void DataDownloaded(object sender, DownloadStringCompletedEventArgs args)
{
EventHandler handler = WebRequestCompleted;
if (handler != null)
{
handler(sender, args);
}
}
}
//now write another class which actully uses above class to make http request and wants to listen request completion
public partial class MainPage : PhoneApplicationPage
{
private string loginurl;
// Constructor
public MainPage()
{
InitializeComponent();
MakeRequest();
}
private void MakeRequest() //you can call this method from any event eg.button click, for simplicity i called it from ctor.
{
string loginurl = "http://www.developer.nokia.com/Community/Wiki/Most_Viewed_Windows_Phone_Articles";
try
{
if (!System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())
{
MessageBox.Show("N/W connection not available");
}
else
{
HTTPManager httpmanager = new HTTPManager(loginurl);
httpmanager.WebRequestCompleted += this.DownlLodCompleted;
httpmanager.MakeRequest();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public void DownlLodCompleted(object sender, EventArgs args)
{
MessageBox.Show("Your request is completed.....");
}
}
