How can I send email in WINDOWS APPLICATION ?

Hi >>>>> I hope this will help.......... uses STMP to send Email ...with attachment also... using System; using System.Text; using System.IO; using System.Net.Sockets; using System.Net; using System.Web.Mail; namespace SMTP { public class SmtpClient { private string smtpServer; private string username; private string password; public SmtpClient(string server) { smtpServer = server; } public SmtpClient(string server, string user, string pass) { smtpServer = server; username = user; password = pass; } private enum SMTPResponse: int { CONNECT_SUCCESS = 220, GENERIC_SUCCESS = 250, DATA_SUCCESS = 354, QUIT_SUCCESS = 221, EXCHANGE_SUCCESS = 334, LOGIN_SUCCESS = 235 } private void SendData(Socket s, string msg) { byte[] data = Encoding.ASCII.GetBytes(msg); s.Send(data , 0, data.Length, SocketFlags.None); } private bool CheckResponse(Socket s, SMTPResponse expectedResponse ) { string sResponse; int response; byte[] bytes = new byte[1024]; int size = s.Receive(bytes, 0, bytes.Length, SocketFlags.None); sResponse = Encoding.ASCII.GetString(bytes,0, size); response = int.Parse(sResponse.Substring(0,3)); if(response != (int)expectedResponse) return false; return true; } public bool Send(MailMessage message) { IPHostEntry IPhst = Dns.Resolve(smtpServer); IPEndPoint endPt = new IPEndPoint(IPhst.AddressList[0], 25); Socket s= new Socket(AddressFamily.InterNetwork, SocketType.Stream,ProtocolType.Tcp); s.Connect(endPt); if(!CheckResponse(s, SMTPResponse.CONNECT_SUCCESS)) { s.Close(); return false; } SendData(s, "HELO "+Dns.GetHostName()+"\r\n"); if(!CheckResponse(s, SMTPResponse.GENERIC_SUCCESS)) { s.Close(); return false; } //if authentication is required if (username != null) { SendData(s, "AUTH LOGIN\r\n"); CheckResponse(s, SMTPResponse.EXCHANGE_SUCCESS); SendData(s, Convert.ToBase64String(Encoding.ASCII.GetBytes(username))+"\r\n"); CheckResponse(s, SMTPResponse.EXCHANGE_SUCCESS); SendData(s, Convert.ToBase64String(Encoding.ASCII.GetBytes(password))+"\r\n"); if(!CheckResponse(s, SMTPResponse.LOGIN_SUCCESS)) { s.Close(); return false; } } SendData(s, "MAIL From: "+message.From+"\r\n"); if(!CheckResponse(s, SMTPResponse.GENERIC_SUCCESS)) { s.Close(); return false; } string[] Tos= message.To.Split(new char[] {';'}); foreach (string To in Tos) { SendData(s, "RCPT TO: " +To+ "\r\n"); if(!CheckResponse(s, SMTPResponse.GENERIC_SUCCESS)) { s.Close(); return false; } } if(message.Cc!=null) { Tos= message.Cc.Split(new char[] {';'}); foreach (string To in Tos) { SendData(s, "RCPT TO: " +To+ "\r\n"); if(!CheckResponse(s, SMTPResponse.GENERIC_SUCCESS)) { s.Close(); return false; } } } StringBuilder data=new StringBuilder(); data.Append("From: " + message.From + "\r\n"); Tos= message.To.Split(new char[] {';'}); data.Append("To: "); for( int i=0; i< Tos.Length; i++) { data.Append( i > 0 ? "," : "" ); data.Append(Tos[i]); } data.Append("\r\n"); if(message.Cc!=null) { Tos= message.Cc.Split(new char[] {';'}); data.Append("Cc: "); for( int i=0; i< Tos.Length; i++) { data.Append( i > 0 ? "," : "" ); data.Append(Tos[i]); } data.Append("\r\n"); } data.Append( "Date: " ); data.Append(DateTime.Now.ToString("ddd, d M y H:m:s z" )); data.Append("\r\n"); data.Append("Subject: " + message.Subject+ "\r\n"); data.Append( "X-Mailer: SMTPDirect v1\r\n" ); string MsgBody = message.Body; if(!MsgBody.EndsWith("\r\n")) MsgBody+="\r\n"; //***************begin process attachments************* if(message.Attachments.Count>0) { data.Append( "MIME-Version: 1.0\r\n" ); data.Append( "Content-Type: multipart/mixed; boundary=unique-boundary-1\r\n" ); data.Append("\r\n"); data.Append( "This is a multi-part message in MIME format.\r\n" ); StringBuilder sb = new StringBuilder(); sb.Append("--unique-boundary-1\r\n"); sb.Append("Content-Type: text/plain\r\n"); sb.Append("Content-Transfer-Encoding: 7Bit\r\n"); sb.Append("\r\n"); sb.Append(MsgBody + "\r\n"); sb.Append("\r\n"); foreach(object obj in message.Attachments) { MailAttachment a = obj as MailAttachment; byte[] binaryData; if(a!=null) { FileInfo f = new FileInfo(a.Filename); sb.Append("--unique-boundary-1\r\n"); sb.Append("Content-Type: application/octet-stream; file=" + f.Name + "\r\n"); sb.Append("Content-Transfer-Encoding: base64\r\n"); sb.Append("Content-Disposition: attachment; filename=" + f.Name + "\r\n"); sb.Append("\r\n"); FileStream fs = f.OpenRead(); binaryData = new Byte[fs.Length]; long bytesRead = fs.Read(binaryData, 0, (int)fs.Length); fs.Close(); string base64String = System.Convert.ToBase64String(binaryData, 0,binaryData.Length); for(int i=0; i< base64String.Length ; ) { int nextchunk=100; if(base64String.Length - (i + nextchunk ) <0) nextchunk = base64String.Length -i; sb.Append(base64String.Substring(i, nextchunk)); sb.Append("\r\n"); i+=nextchunk; } sb.Append("\r\n"); } } sb.Append("--unique-boundary-1--\r\n"); MsgBody=sb.ToString(); } //*************end process attachments*********** SendData(s, ("DATA\r\n")); if(!CheckResponse(s, SMTPResponse.DATA_SUCCESS)) { s.Close(); return false; } data.Append( "\r\n" ); data.Append( MsgBody ); data.Append( ".\r\n" ); data.Append( "\r\n" ); data.Append( "\r\n" ); SendData(s, data.ToString()); if(!CheckResponse(s, SMTPResponse.GENERIC_SUCCESS )) { s.Close(); return false; } SendData(s, "QUIT\r\n"); CheckResponse(s, SMTPResponse.QUIT_SUCCESS ); s.Close(); return true; } } }

Nice and simple: Add a reference in your application to the System.Web.dll. Add a using statement at the top for System.Web.Mail. Create a MailMessage object, assign all of the appropriate values, and use the SmtpMail static class to send the MailMessage object. Example: using System.Web.Mail; (snip) MailMessage mm = new MailMessage(); mm.From = "[email protected]"; mm.To = "[email protected]"; mm.Subject = "This is the subject"; mm.Body = "This is the body"; SmtpMail.SmtpServer = "mail.somewhere.com"; SmtpMail.Send(mm); There are other properties you can set also, such as using Html formatting, but I'll leave that up to you to discover.

You can use any assembly that implements it, but System.Web.Mail implements it and it comes with the .NET 1.1 SDK. Add a reference to it and IMPORT the namespace. See the online help on usage. Another one you can use is here. http://www.example-code.com/csharp/sendEmail.asp

He said a WINDOWS application, not an ASP.NET application.

add new linkLabel1 to your Form ... go to the Text property of the linkLabel1 and write in it "send me a mail" go to the Tag property of the linkLabel1 and write in it "mailto: [email protected]" now double click on the linkLabel1 the write the following code: System.Diagnostics.Process.Start(linkLabel1.Tag.ToString()); thasts it... Feras