using System; using System.Net.NetworkInformation; class MainClass { static void Main() { if (NetworkInterface.GetIsNetworkAvailable()) { NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces(); foreach (NetworkInterface ni in interfaces) { Console.WriteLine(" Bytes Sent: {0}", ni.GetIPv4Statistics().BytesSent); } } else { Console.WriteLine("No network available."); } } }
NetworkInterface: GetIPProperties
using System; using System.Net.NetworkInformation; class MainClass { static void Main() { if (NetworkInterface.GetIsNetworkAvailable()) { NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces(); foreach (NetworkInterface ni in interfaces) { foreach (UnicastIPAddressInformation addr in ni.GetIPProperties().UnicastAddresses) { Console.WriteLine(" - {0} (lease expires {1})", addr.Address, DateTime.Now + new TimeSpan(0, 0, (int)addr.DhcpLeaseLifetime)); } } } else { Console.WriteLine("No network available."); } } }
Mail Attach Test
/* C# Network Programming by Richard Blum Publisher: Sybex ISBN: 0782141765 */ using System; using System.Web.Mail; public class MailAttachTest { public static void Main() { MailAttachment myattach = new MailAttachment("c: empMailAttachTest.exe", MailEncoding.Base64); MailMessage newmessage = new MailMessage(); newmessage.From = "barbara@shadrach.ispnet1.net"; newmessage.To = "rich@shadrach.ispnet1.net"; newmessage.Subject = "A test mail attachment message"; newmessage.Priority = MailPriority.High; newmessage.Headers.Add("Comments", "This message attempts to send a binary attachment"); newmessage.Attachments.Add(myattach); newmessage.Body = "Here's a test file for you to try"; try { SmtpMail.SmtpServer = "192.168.1.100"; SmtpMail.Send(newmessage); } catch (System.Web.HttpException) { Console.WriteLine("This device can not send Internet messages"); } } }
Fancy Mail Test
/* C# Network Programming by Richard Blum Publisher: Sybex ISBN: 0782141765 */ using System; using System.Web.Mail; public class FancyMailTest { public static void Main() { MailMessage mm = new MailMessage(); mm.From = "haley@myisp.net"; mm.To = "riley@yourisp.net;rich@shadrach.ispnet1.net"; mm.Cc = "matthew@anotherisp.net;chris@hisisp.net"; mm.Bcc = "katie@herisp.net;jessica@herisp.net"; mm.Subject = "This is a fancy test message"; mm.Headers.Add("Reply-To", "haley@myisp.net"); mm.Headers.Add("Comments", "This is a test HTML message"); mm.Priority = MailPriority.High; mm.BodyFormat = MailFormat.Html; mm.Body = "<html><body><h1>This is a test message</h1><h2>This message should have HTML-type formatting</h2>Please use an HTML-capable viewer."; try { SmtpMail.Send(mm); } catch (System.Web.HttpException) { Console.WriteLine("This device is unable to send Internet messages"); } } }
A POP3 e-mail checker
/* C# Network Programming by Richard Blum Publisher: Sybex ISBN: 0782141765 */ using System; using System.Drawing; using System.IO; using System.Net; using System.Net.Sockets; using System.Text; using System.Threading; using System.Windows.Forms; public class PopCheck : Form { private TextBox hostname; private TextBox username; private TextBox password; private TextBox status; private ListBox messages; private TcpClient mailclient; private NetworkStream ns; private StreamReader sr; private StreamWriter sw; public PopCheck() { Text = "popcheck - A POP3 e-mail checker"; Size = new Size(400, 380); Label label1 = new Label(); label1.Parent = this; label1.Text = "Hostname:"; label1.AutoSize = true; label1.Location = new Point(10, 33); hostname = new TextBox(); hostname.Parent = this; hostname.Size = new Size(200, 2 * Font.Height); hostname.Location = new Point(75, 30); Label label2 = new Label(); label2.Parent = this; label2.Text = "User name:"; label2.AutoSize = true; label2.Location = new Point(10, 53); username = new TextBox(); username.Parent = this; username.Size = new Size(200, 2 * Font.Height); username.Location = new Point(75, 50); Label label3 = new Label(); label3.Parent = this; label3.Text = "Password:"; label3.AutoSize = true; label3.Location = new Point(10, 73); password = new TextBox(); password.Parent = this; password.PasswordChar = '*'; password.Size = new Size(200, 2 * Font.Height); password.Location = new Point(75, 70); Label label4 = new Label(); label4.Parent = this; label4.Text = "Status:"; label4.AutoSize = true; label4.Location = new Point(10, 325); status = new TextBox(); status.Parent = this; status.Text = "Not connected"; status.Size = new Size(200, 2 * Font.Height); status.Location = new Point(50, 322); messages = new ListBox(); messages.Parent = this; messages.Location = new Point(10, 108); messages.Size = new Size(360, 16 * Font.Height); messages.DoubleClick += new EventHandler(getmessagesDoubleClick); Button login = new Button(); login.Parent = this; login.Text = "Login"; login.Location = new Point(295, 32); login.Size = new Size(5 * Font.Height, 2 * Font.Height); login.Click += new EventHandler(ButtonloginOnClick); Button close = new Button(); close.Parent = this; close.Text = "Close"; close.Location = new Point(295, 62); close.Size = new Size(5 * Font.Height, 2 * Font.Height); close.Click += new EventHandler(ButtoncloseOnClick); } void ButtonloginOnClick(object obj, EventArgs ea) { status.Text = "Checking for messages..."; Thread startlogin = new Thread(new ThreadStart(loginandretr)); startlogin.IsBackground = true; startlogin.Start(); } void ButtoncloseOnClick(object obj, EventArgs ea) { if (ns != null) { sw.Close(); sr.Close(); ns.Close(); mailclient.Close(); } Close(); } void loginandretr() { string response; string from = null; string subject = null; int totmessages; try { mailclient = new TcpClient(hostname.Text, 110); } catch (SocketException) { status.Text = "Unable to connect to server"; return; } ns = mailclient.GetStream(); sr = new StreamReader(ns); sw = new StreamWriter(ns); response = sr.ReadLine(); //Get opening POP3 banner sw.WriteLine("User " + username.Text); //Send username sw.Flush(); response = sr.ReadLine(); if (response.Substring(0,4) == "-ERR") { status.Text = "Unable to log into server"; return; } sw.WriteLine("Pass " + password.Text); //Send password sw.Flush(); try { response = sr.ReadLine(); } catch (IOException) { status.Text = "Unable to log into server"; return; } if (response.Substring(0,3) == "-ER") { status.Text = "Unable to log into server"; return; } sw.WriteLine("stat"); //Send stat command to get number of messages sw.Flush(); response = sr.ReadLine(); string[] nummess = response.Split(' '); totmessages = Convert.ToInt16(nummess[1]); if (totmessages > 0) { status.Text = "you have " + totmessages + " messages"; } else { status.Text = "You have no messages" ; } for (int i = 1; i <= totmessages; i++) { sw.WriteLine("top " + i + " 0"); //read header of each message sw.Flush(); response = sr.ReadLine(); while (true) { response = sr.ReadLine(); if (response == ".") break; if (response.Length > 4) { if (response.Substring(0, 5) == "From:") from = response; if (response.Substring(0, 8) == "Subject:") subject = response; } } messages.Items.Add(i + " " + from + " " + subject); } } void getmessagesDoubleClick(object obj, EventArgs ea) { string text = (string)messages.SelectedItem; string[] textarray = text.Split(' '); ShowMessage sm = new ShowMessage(ns, textarray[0]); sm.ShowDialog(); } public static void Main() { Application.Run(new PopCheck()); } } class ShowMessage : Form { public ShowMessage(NetworkStream ns, string messnumber) { StreamReader sr = new StreamReader(ns); StreamWriter sw = new StreamWriter(ns); string response; Text = "Message " + messnumber; Size = new Size(400, 380); ShowInTaskbar = false; TextBox display = new TextBox(); display.Parent = this; display.Multiline = true; display.Dock = DockStyle.Fill; display.ScrollBars = ScrollBars.Both; sw.WriteLine("retr " + messnumber); //Retrieve entire message sw.Flush(); response = sr.ReadLine(); while (true) { response = sr.ReadLine(); if (response == ".") break; display.Text += response + " "; } } }
Mail Test
using System; using System.Net; using System.Web.Mail; public class MailTest { public static void Main() { string from = "from@from.net"; string to = "to@to.net"; string subject = "This is a test mail message"; string body = "Hi ."; SmtpMail.SmtpServer = "192.168.1.150"; SmtpMail.Send(from, to, subject, body); } }
SmtpClient: From, Subject, Body, Attachments, To
using System; using System.Net; using System.Net.Mail; class MainClass { public static void Main(string[] args) { SmtpClient client = new SmtpClient("mail.somecompany.com", 25); client.Credentials = new NetworkCredential("user@somecompany.com", "password"); using (MailMessage msg = new MailMessage()) { msg.From = new MailAddress("author@visual-csharp-recipes.com"); msg.Subject = "Greetings"; msg.Body = "This is a message."; msg.Attachments.Add(new Attachment("7.cs", "text/plain")); msg.Attachments.Add(new Attachment("7.exe", "application/octet-stream")); foreach (string str in args) { try { msg.To.Add(new MailAddress(str)); } catch (FormatException ex) { Console.WriteLine("{0}: Error -- {1}", str, ex.Message); continue; } } client.Send(msg); } } }