using System;
using System.Data;
using System.Threading;
using System.Windows.Forms;

namespace Win
{
    /// <summary>
    ///每隔30分鐘運行一次
    /// </summary>
    public class Timer
    {
        /// <summary>是否正在運行</summary>
        public bool bRun;
        /// <summary>出錯的最多次數</summary>
        public int iCount=10;    

        public Timer()
        {
            bRun = false;
            //只用於拋出線程
            Thread myThread = new Thread(new ThreadStart(RunTimer));
            myThread.Start();
        }

        /// <summary>
        ///  檢測時間與等待時間
        /// </summary>
        private void RunTimer()
        {
            int curM = Int32.Parse(DateTime.Now.Minute.ToString());
            if((curM==0 || curM==30) && !bRun)
            {
                bRun = true;
                Thread thread = new Thread(new ThreadStart(RunMethod));
                thread.Start();
            }
            else
            {
                
                if(curM>30)
                    curM = 60-curM;
                else
                    curM = 30-curM;
                MessageBox.Show(curM.ToString());
                Thread.Sleep(curM*60*1000);
                RunTimer();
            }
        }

        /// <summary>
        /// 定時執行的方法
        /// </summary>
        private void RunMethod()
        {
            int iRun = 0;
            try
            {
                MessageBox.Show(DateTime.Now.ToString());
                bRun = false;
                RunTimer();
            }
            catch
            {
                if(iRun<iCount)    RunMethod();
                else MessageBox.Show("系統執行問題");
            }
            finally
            {
                iRun++;
            }
        }
        

    }
}