Sto provando a scrivere un'applicazione che è costantemente alla ricerca di host su una LAN. Quando eseguo questo come una console come il countdown.Wait() sembra funzionare bene. Tuttavia quando porto il codice in una finestra, countdown.Signal() sembra non decrementare il suo contatore. Non sei sicuro di quale sia il problema.Codice asincrono che funziona in Console ma non in Windows Form
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.NetworkInformation;
using System.Diagnostics;
using System.Net;
using System.Threading;
namespace Multi_Threaded
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
PortScanner ps = new PortScanner();
ps.ProbeCompleted += new PingProbeCompleted(ps_ProbeCompleted);
ps.run_ping_probe();
}
void ps_ProbeCompleted(object sender, PingProbeCompletedArguments e)
{
MessageBox.Show("I found " + e.ip_adresses_list_of_host.Count.ToString() + "host(s)");
}
}
public delegate void PingProbeCompleted(object sender,PingProbeCompletedArguments e);
public class PingProbeCompletedArguments : EventArgs
{
public List<string> ip_adresses_list_of_host;
}
public class PortScanner
{
public event PingProbeCompleted ProbeCompleted;
static List<string> ip_adresses = new List<string>();
static CountdownEvent countdown;
public void run_ping_probe()
{
ip_adresses.Clear();
countdown = new CountdownEvent(1);
string ipBase = "10.125.";
for (int sub = 0; sub < 14; sub++)
{
for (int i = 1; i < 255; i++)
{
string ip = ipBase + sub.ToString() + "." + i.ToString();
Ping p = new Ping();
p.PingCompleted += new PingCompletedEventHandler(p_PingCompleted);
countdown.AddCount();
p.SendAsync(ip, 100, ip);
}
}
countdown.Signal();
countdown.Wait();
PingProbeCompletedArguments e = new PingProbeCompletedArguments();
e.ip_adresses_list_of_host = ip_adresses;
ProbeCompleted(this, e);
}
private void p_PingCompleted(object sender, PingCompletedEventArgs e)
{
string ip = (string)e.UserState;
if (e.Reply.Status == IPStatus.Success)
{
ip_adresses.Add(ip + "\t" + e.Reply.RoundtripTime + " ms");
}
countdown.Signal();
}
}