Merge remote-tracking branch 'origin/master'

DotNet/csharp.smtp.multithreaded/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Quiksoft.EasyMail.SMTP;
+
+/*
+* This sample uses the Quiksoft EasyMail SMTP Object which you can find at: http://www.quiksoft.com/emdotnet/
+*/
+
+namespace Bulk_Sender
+{
+    class Program
+    {
+        static int threadsOpen = 0;
+        static void Main(string[] args)
+        {
+            //leave the Quiksoft license.key assignment if you want to use EasyMail .Net Edition in trial mode.  Otherwise uncomment and put in your code.
+            //Quiksoft.EasyMail.SMTP.License.Key = "Your license key goes here";
+
+            DateTime dtStart = DateTime.Now;
+
+            /* fire off 4 threads
+             * each thread can send multiple messages
+            */
+            for (int x = 0; x < 4; x++)
+            {
+                Interlocked.Increment(ref threadsOpen);
+                System.Threading.Thread t = new System.Threading.Thread(new System.Threading.ThreadStart(SendThread));
+                t.Start();
+            }
+
+            while (threadsOpen > 0)
+                System.Threading.Thread.Sleep(500);
+
+
+            TimeSpan ts = DateTime.Now - dtStart;
+            Console.WriteLine("Finished in: " + ts);
+            Console.ReadLine();
+        }
+
+
+        public static void SendThread()
+        {
+            //create SMTP object
+            SMTP objSMTP = new SMTP();
+            objSMTP.SMTPServers.Add("your_smtp_server_address", 25, 60, SMTPAuthMode.AuthLogin, "your_smtp_user", "your_smtp_password");
+
+            /*
+             * this sample just sends one message per thread/connection but in the real world you should send about
+             * 50-100 messages per connection. You will have to add your database retrieval and loop management here
+             * 
+             * i.e. grab 50 records from db, connect, loop through and send all 50 and then disconnect
+             * repeat as long as there are more records to process in database
+            */
+
+
+            //establish connection and keep it open for all messages we send
+            objSMTP.Connect();
+
+
+            EmailMessage objMessage = new EmailMessage();
+            objMessage.From = new Address("sender@domain.com", "Sender Name");
+            objMessage.Recipients.Add("recipient@domain.com", "Recipient Name", RecipientType.To);
+            objMessage.Subject = "Subject...";
+            objMessage.BodyParts.Add("Hi ##FIRSTNAME##, Thank you for your interest in ##PRODUCT##.", BodyPartFormat.Plain, BodyPartEncoding.QuotedPrintable);
+            Dictionary<string, string> tokens = new Dictionary<string, string>();
+            tokens["##FIRSTNAME##"] = "John";
+            tokens["##PRODUCT##"] = "SocketLabs Email On-Demand";
+            objMessage.BodyParts[0].Body = BulkReplace(objMessage.BodyParts[0].Body, tokens);
+
+            objSMTP.Send(objMessage);
+
+            //close connection after all messages have been sent
+            objSMTP.Disconnect();
+
+
+
+            Interlocked.Decrement(ref threadsOpen);
+        }
+
+        static string BulkReplace(string txt, Dictionary<string, string> tokens)
+        {
+            foreach (string token in tokens.Keys)
+            {
+                txt = txt.Replace(token, tokens[token]);
+            }
+            return txt;
+        }
+
+    }
+}