Sending SMS at the same time

This concept is not needed Multi Threading ...

This concept is more of a Task Manager / Cron Job

• Create an ASPX Script that sees the time and executes the method you need.
• Configure Task Manager to run this Script every xx minutes
• Create a method that picks a list of people and sends SMS via SMS API and calls it eg. SendSMSFromList (User ListList, string message) {}
• Now set everything up and you run it anytime (just set it to ASPX Script)

Please feel free to tell me if you need some code for this.

edited for all steps

If you have a hosting solution, in your hosting control panel, you have something like Task Schedule that you can configure to run the Script page every n minutes, if so please take the following steps. If, on the other hand, you are running your own server (IIS), then do that first.

• Install cUrl for windows from this location and add curl.exe to C: \ WINDOWS
• Open Task Manager (Control Panel> Administrative Tools> Task Scheduler on win7)
• Create a new task like this
• Run the command

curl http: //localhost/yourApp/taskManager.aspx

with this, you just configured your system to run the file, as if you followed this link in your browser, which will run every 15 minutes.

Now we need to create taskManager.aspx file

public partial class taskManager : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DateTime dt = DateTime.Now;

        // Run after midnight
        if (dt.Hour == 0 && dt.Minute <= 15)
        {
            Write2Log("Schedule Job Started", LogType.INFO);

            SendSMSFromList(
                GetUsersList(), 
                GetSMSMessage());

            Write2Log("Schedule Job Finished", LogType.INFO);
        }
    }

    private string GetSMSMessage()
    { 
        // Fetch the text from DB...

        return "This is the message content that I will send as SMS"; 
    }

    private List<string> GetUsersList()
    { 
        // fetch the list form DB...

        return new List<string>(); 
    }

    private void SendSMSFromList(List<string> usersList, string message)
    { 
        // send SMS's
        foreach (string phoneNr in usersList)
        { 
            // send message
            mySMSAPI.Send(phoneNr, message);
        }
    }

    private void Write2Log(string text, LogType type)
    { 
        // Log to a file what going on...
        try
        {
            string filename = HttpContext.Current.Server.MapPath("") + "\\status.log";
            using (StreamWriter sw = new StreamWriter(filename, true))  // open to append
            {
                // example: 2008-12-17 13:53:10,462 INFO - Schedule Job Finished
                string write = String.Format("{0} {1} - {2}",
                                DateTime.Now,
                                type.ToString(),
                                text);

                sw.WriteLine(write);
            }
        }
        catch (Exception)
        { }
    }

    private enum LogType
    { INFO, WARNING, ERROR }
}

      

        
        
        
      

    

Done ...

I did everything in one file for the sake of example, you should split things ... but what I wanted was to show you the principle of this.