Detailed introduction to C#Win32 console thread timer code example

Three types of timers are provided in C#:
1. Windows-based standard timer (System.Windows.Forms.Timer)
2. Server-based timer (System.Timers. Timer)
3. Thread timer (System.Threading.Timer)
1. Windows-based standard timer (System.Windows.Forms.Timer)
The first thing to note is that the Windows timer is designed for a single-threaded environment
This timer has existed in the product since Visual Basic version 1.0 and has been basically unchanged
This timer is used The simplest one, just drag the Timer control in the toolbox onto the form, and then set the event and interval properties.
2. Server-based timer (System .Timers.Timer)
System.Timers.Timer does not rely on forms. It wakes up threads from the thread pool. It is an updated version of the traditional timer optimized for running in a server environment. The toolbox of VS2008 does not provide ready-made controls, so you need to manually code to use this timer
3. Thread timer (System.Threading.Timer)
Thread timing The timer also does not rely on forms. It is a simple, lightweight timer that uses callback methods instead of events and is supported by thread pool threads. Thread timers are useful in scenarios where messages are not sent on a thread.

Here we only give code examples for the use of console thread timers. Several other code examples will be given later:

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;

/************************************************************************/
/* CSharp控制台线程计时器代码示例
 * Powered by:testcs_dn
 * Blog:http://www.php.cn/
 */
/************************************************************************/
namespace CSharp控制台线程计时器代码示例
{
    /// <summary>
    /// 控制台线程计时器代码示例
    /// 这里展示了Windows API SetConsoleCtrlHandler函数的应用，同时展示了线程计时器的使用；
    /// Author:testcs_dn
    /// Date:2015-01-03
    /// </summary>
    class Program
    {
        /// <summary>
        /// 计时器回调函数，在这里处理计时时间是否到达的判断以及要做的事情；
        /// </summary>
        /// <param name="obj"></param>
        public static void workOvertimeTimerCallback(object obj)
        {
            DateTime dt = DateTime.Now;
            if (dt.Hour == 16 && dt.Minute > 0)
            {
                Console.WriteLine("ok");
            }
        }

        //计时器变量
        public static System.Threading.Timer workOvertimeTimer = null;

        //定义处理程序委托
        delegate bool ConsoleCtrlDelegate(int dwCtrlType);

        const int CTRL_CLOSE_EVENT = 2;

        //导入SetCtrlHandlerHandler API
        [DllImport("kernel32.dll")]
        private static extern bool SetConsoleCtrlHandler(ConsoleCtrlDelegate HandlerRoutine, bool Add);
        static void Main(string[] args)
        {
            ConsoleCtrlDelegate newDelegate = new ConsoleCtrlDelegate(HandlerRoutine);
            if (SetConsoleCtrlHandler(newDelegate, true))
            {
                //初始化计时器
                workOvertimeTimer = new System.Threading.Timer(new TimerCallback(workOvertimeTimerCallback), null, 1000, 10000);
                //这里执行你自己的任务，我举例输出“...”，为了展示长时间的任务，我用了一个死循环；
                //避免输出太多，使用了Sleep；
                //注意：Sleep的时间不可太长，否则可能影响Console.ReadKey()，导致不能接收用户输入；
                while (true)
                {
                    Console.WriteLine("...");
                    Thread.Sleep(100);
                }
            }
            else
            {
                Console.WriteLine("抱歉，API注入失败，按任意键退出！");
                Console.ReadKey();
            }
        }

        /// <summary>
        /// 处理程序例程，在这里编写对指定事件的处理程序代码
        /// </summary>
        /// <param name="CtrlType"></param>
        /// <returns></returns>
        static bool HandlerRoutine(int CtrlType)
        {
            switch (CtrlType)
            {
                case CTRL_CLOSE_EVENT:       //用户要关闭Console了
                    Console.WriteLine();
                    Console.WriteLine("任务还没有完成，确认要退出吗？（Y/N）");
                    ConsoleKeyInfo ki = Console.ReadKey();
                    return ki.Key == ConsoleKey.Y;
                default:
                    return true;
            }
        }
    }
}

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