Author: alex

namespace HelloWorld {

    public class Demo : IScriptlet {

        private Button _okButton;
        private XMLHttpRequest _request;

        public void Start() {

            _okButton = new Button(Document.GetElementById("okButton"));
            _okButton.Click += new EventHandler(this.OnOKButtonClick);
        }

        private void OnOKButtonClick(object sender, EventArgs e) {
            Callback completedCallback = new Callback(this.OnRequestComplete);

            _request = new XMLHttpRequest();
            _request.Onreadystatechange = Delegate.Unwrap(completedCallback);
            _request.Open("GET", "Hello.ashx", true);
            _request.Send(null);
        }

        private void OnRequestComplete() {
            if (_request.ReadyState == 4) {
                _request.Onreadystatechange = Function.Empty;
               
                Window.Alert(_request.ResponseText);
            }
        }
    }
}
 

// Handler.ashx: Se encarga de procesar la petición.

using System;
using System.Web;

public class HelloHandler : IHttpHandler {

    public bool IsReusable {
        get {
            return true;
        }
    }

    public void ProcessRequest(HttpContext context) {
        HttpRequest request = context.Request;
        HttpResponse response = context.Response;

        string greeting = String.Empty;
        string name = request["name"];
        if (!String.IsNullOrEmpty(name))
        {
            greeting = "Hello " + HttpUtility.HtmlEncode(name) + "!";
        }
        else
            greeting = "Hello from server";

        greeting += " - Server time: " + DateTime.Now.ToShortTimeString();
     
        response.ContentType = "text/plain";
        response.Write(greeting);
    }
}