// You could get a similar behaviour when using the following public delegate
//public delegate void pageLoaded(object sender, MyWebSurferEventArgs args);
//this asynchronous function does the web request and fires the event pageLoaded when a result is obtained
public async void StartWebrequest(string url)
{
//Code from the lecture
var request = WebRequest.Create(url);
var response = await request.GetResponseAsync(); //await the result
using (var stream = new StreamReader(response.GetResponseStream())) //use a streamreader with using to take care of the closing/disposing of the stream
{
var content = stream.ReadToEnd(); //read all data
//create a new instance of MyWebSurferEventargs where the content is saved
var parameter = new MyWebSurferEventArgs(content);
//check if the event has listeners - important for proper code
if (pageLoaded != null)
{
pageLoaded(this, parameter); //fire the event with sender = this and the MyWebSurferEventArgs from above
}
}
response.Close(); //dispose the response
}
//This is the function that will be called when the pageLoaded-event is fired
//it takes MyWebSurferEventArgs to transmit the message
private static void Surfi_pageLoaded(object sender, MyWebSurferEventArgs e)
{
//give out result which is saved in the message property
Console.WriteLine(e.message);
}