如何在每个"X"中循环按钮的功能分钟? [英] how to loop a button's functions every "X" minutes?

问题描述

我有一个按钮，只需单击一下即可执行许多不同的功能.和一个文本框.当单击按钮时，我希望这些功能每x分钟重复一次. x分钟代表文本框的值.以及texbox是否为空白.不重复.还有另一个按钮将停止计时器.我该怎么做呢?我不知道计时器，我想这是学习的好方法..

i have a button that does many different functions with one click. and a textbox. when the button is clicked i want those functions to be repeated every x minutes. and x minutes represents the value of the textbox. and if the texbox is blank. to not repeat. also another button that will stop the timer. how do i do this? i dont know timers and im guessing this is a good way to learn..

推荐答案

public partial class Form1 : Form
{
   Timer theTimer = new Timer();
   public int countdown { get; set; }
   
   public Form1()
   {
      InitializeComponent();
      theTimer.Tick += new EventHandler(theTimer_Tick);
   }

   void theTimer_Tick(object sender, EventArgs e)
   {
      //Work the Functions
   }

   private void btn_StopTimer_Click(object sender, EventArgs e)
   {
      if (theTimer.Enabled)
         theTimer.Stop();
   }

   private void btn_StartTimer_Click(object sender, EventArgs e)
   {
      if (this.txt_TimerInterval.Text != "")
      {
         int theInterval = 0;
         if (Int32.TryParse(this.txt_TimerInterval.Text, out theInterval))
         {
            if (theInterval != 0)
            {
               theTimer.Interval = theInterval * 1000;
               theTimer.Start();
            }
         }
       }
       else
       {
          btn_StopTimer_Click(null, null);
       }
   }
}

我创建的只是一个虚拟表格.它包含2个按钮，btn_StartTimer启动计时器，btn_StopTimer停止计时器. txt_TimerInterval是您要在其中设置运行计时器的分钟数的文本框

Just a dummy form I created. It contains 2 buttons, btn_StartTimer starts the timer, btn_StopTimer stops the timer. txt_TimerInterval is the textbox where you want to set the minutes to run the timer

您好vlad781，

我根据您的要求创建了一个可执行示例.
(我不建议将文本框用于重复输入，请看一下NumericUpDown).随时问是否有不清楚的地方...

Hi vlad781,

I created an executable example based on your requirements for you.
(I wouldn''t recommend using a textbox for repetition input, have a look at NumericUpDown). Feel free to ask if anything is unclear...

using System;
using System.Windows.Forms;

namespace Repeat
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            // Create a test Form with Buttons and a Textbox to enter the repetition count
            Form form = new Form();
            Button buttonStart = new Button();
            buttonStart.Text = "Start";
            buttonStart.Dock = DockStyle.Top;
            Button buttonStop = new Button();
            buttonStop.Text = "Stop";
            buttonStop.Dock = DockStyle.Top;
            TextBox textbox = new TextBox();
            textbox.Dock = DockStyle.Top;
            form.Controls.Add(buttonStop);
            form.Controls.Add(buttonStart);
            form.Controls.Add(textbox);

            // Create a timer
            Timer timer = new Timer();
            timer.Interval = 60000; // set the timer interval to one minute
 
            int iRepetitionCount = 0; // Number of remainig repetitions

            // Add event handlers for the button Click-Events

            buttonStart.Click += delegate(object sender, EventArgs e)
            {
                // Restarting also stops the timer
                timer.Stop();

                if (String.IsNullOrWhiteSpace(textbox.Text)) // Textbox empty?
                {
                    // Just call the function once
                    TheFunction();
                }
                else
                {
                    // Try to get the entered repetition value
                    iRepetitionCount = 0; // reset
                    if (!Int32.TryParse(textbox.Text, out iRepetitionCount))
                    {
                        MessageBox.Show("Invalid repetition count");// The entered text could not be converted to an integer
                        return;
                    }

                    // Call the function now 
                    TheFunction();
                    iRepetitionCount--;  // Decrement the repetition counter
                    // ... and start the timer (on timer.Tick the Function will be called again)
                    timer.Start();
                }
            };

            buttonStop.Click += delegate(object sender, EventArgs e)
            {
                // Stop the repetition timer
                timer.Stop();
            };

            // Add event handlers for the timer Tick-Events

            timer.Tick += delegate(object sender, EventArgs e)
            {
                if (iRepetitionCount <= 0) // no more repetitions?
                {
                    timer.Stop(); // stop the timer now
                }
                else
                {
                    iRepetitionCount--; // Decrement the repetition counter
                    TheFunction(); // Call the function
                }
            };

            // Run the form
            Application.Run(form);
        }

        static void TheFunction()
        {
            MessageBox.Show("I was called at " + DateTime.Now.ToString());
        }
    }
}

您最好使用线程.
http://msdn.microsoft.com/en-us/library/7a2f3ay4 (v = vs.80).aspx [

You better should use threads.
http://msdn.microsoft.com/en-us/library/7a2f3ay4(v=vs.80).aspx[^]

To elapse the time, you can use Thread.Sleep within thread loop.

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