ScheduledTimer & CrossThread

[창공]

== ScheduledTimer.cs ==
using System;
using System.Threading;

namespace ScheduledTimer
{
    public delegate void stCallBackDelegate();
    public class ScheduledTimer
    {
        private Timer _timer;
        public ScheduledTimer() { }
        public static TimeSpan GetDueTime(TimeSpan A, TimeSpan B)
        {
            if (A < B)
            {
                return B.Subtract(A);
            }
            else
            {
                return new TimeSpan(24, 0, 0).Subtract(B.Subtract(A));
            }
        }

        public void SetTime(TimeSpan _time, stCallBackDelegate callback)
        {
            if (this._timer != null)
            {
                // Change 매서드 사용 가능.
                this._timer = null;
            }
            TimeSpan Now = DateTime.Now.TimeOfDay;
            TimeSpan DueTime = GetDueTime(Now, _time);

            this._timer = new Timer(new TimerCallback(delegate(object _callback)
            {
                ((stCallBackDelegate)_callback)();
            }), callback, DueTime, new TimeSpan(24, 0, 0));
        }
    }
}

== Form1.cs ==

using System;
using System.Windows.Forms;

namespace ScheduledTimer
{
    public partial class Form1 : Form
    {  
  string DateForm="HH:mm:ss.fff";
  bool StartFlag=false ;
  
        public Form1()
        {
            InitializeComponent();
        }
  
  private void Form1_Load(object sender, EventArgs e)
  {   
   //TimeSpan ts = NextSec() ;
   //label1.Text += "시작 시간 : " + ts.ToString() ;
  }

  delegate void ExecMethodCallback() ;
        private void ExecMethod()
        {
   if(textBox1.InvokeRequired)
   {
    ExecMethodCallback d = new ExecMethodCallback(ExecMethod) ;
    this.Invoke(d, new object[] {}) ;
   }
   else
   {
    DateTime now = DateTime.Now ;

    int cur = (now.Millisecond < 500) ? now.Second : now.Second+1 ;

    TimeSpan timeS = new TimeSpan(now.Hour, now.Minute, cur) ;
    textBox1.Text += timeS.ToString() + " --- " ;

    textBox1.Text += now.ToString(DateForm) +"\r\n" ;

    textBox1.SelectixxonStart = textBox1.TextLength;
    textBox1.ScrollToCaret();
    NextSec() ;
   }
        }

  private TimeSpan NextSec()
  {
   DateTime now = DateTime.Now ;
   int next = (now.Millisecond < 900) ? now.Second+1 : now.Second+2 ;

   TimeSpan timeS = new TimeSpan(now.Hour, now.Minute, next) ; // now.Second+1) ;

   if(!StartFlag) return timeS ;

            ScheduledTimer st = new ScheduledTimer();
            //st.SetTime(GetTimeSpan(), ExecMethod); // SetTime(예약시간, 실행메소드)
   st.SetTime(timeS, ExecMethod); // SetTime(예약시간, 실행메소드)
   return timeS ;
  }

  private void button1_Click(object sender, EventArgs e)
  {
   StartFlag = !StartFlag ;
   if(StartFlag)
   {
    TimeSpan ts = NextSec() ;
    label1.Text = "시작 시간 : " + ts.ToString() ;
    button1.BackColor = System.Drawing.Color.DeepSkyBlue;
   }
   else
    button1.BackColor = System.Drawing.Color.Transparent;
  }
    }
}