如何在不使用计时器控件的情况下在指定的时间显示提醒 [英] How to show a reminder in specified time without using a Timer Control

问题描述

Hai我想向用户显示提醒列表.提醒可以进行编辑.
我需要在不使用TIMER控件的情况下实现它.
通过C#代码帮助我.

Hai I want to show a list of reminders to users. The reminder can be edited.
I need to implement it without using a TIMER Control.
Help me through C# code.

推荐答案

使用线程(此代码未经测试，因此您可能需要对其进行调整).以下代码允许间隔或一天中的某个时间.

Use a thread (this code is untested, so you may have to tweak it). The following code allows for either an interval or a time of day.

using System.Threading;

public partial class MyForm
{
    Thread m_reminder = new Thread(new ParameterizedThreadStart(ReminderThread));

    public MyForm()
    {
        m_reminder.Start(new ThreadParams(new TimeSpan(0,1,0,0,0), true));
    }

    private void ReminderThread(ThreadParams params)
    {
        DateTime now = DateTime.Now;
        DateTime execTime;
        bool needNewTime = true;
        if (params.AsInterval)
        {
            execTime = now + params.Time;
        }
        else
        {
            execTime = new DateTime(now.Year, now.Month, now.Day, params.Time.Hours, params.Time.Minutes);
            if (execTime > now)
            {
                needNewTime = false; 
            }
        }
        try
        {
            while (true)
            {
                if (needNewTime)
                {
                    if (params.AsInterval)
                    {
                        execTime = execTime.Add(params.Time);
                    }
                    else
                    {
                        exectTime = execTime.AddDays(1);
                    }
                }
                if (DateTime.Now >= execTime)
                {
                    needNewTime = true;
                    // do something...
                }
                else
                {
                    Thread.Sleep(1000);
                }    
            }
        }
        catch (ThreadAbortException)
        {
            // eat the exception
        }
    }
}

public class ThreadParams
{
    public TimeSpan Time   { get; set; }
    public bool Asinterval { get; set; }
    public ThreadParams(TimeSpan time, bool asInterval)
    {
        Time = time;
        AsInterval = asinterval;
    }
}

编辑==============

修改以更正用于启动线程的单参数问题.

EDIT ==============

Modified to correct single-parameter issue for starting a thread.

使用系统托盘功能.其余 [ ^ ]的文章可能会对您有所帮助.

Use the System Tray feature.Remainder[^] article might help you.

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