Visual Studio的C＃while循環冷凍形式應用

Question

這裏是我的代碼：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 
using System.Threading; 

namespace _8BB_2._0 
{ 
    public partial class Form1 : Form 
    { 
     public static class globalVars 
     { 
      public static bool spacerunning = false; 
     } 

     public Form1() 
     { 
      InitializeComponent(); 
      globalVars.spacerunning = false; 
     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      if (!globalVars.spacerunning) 
      { 
       globalVars.spacerunning = true; 
       while (globalVars.spacerunning) 
       { 
        Thread.Sleep(1000); 
        SendKeys.Send(" "); 
       } 
      } 
      else if (globalVars.spacerunning) 
      { 
       globalVars.spacerunning = false; 
      } 
     } 
    } 
} 

當我點擊按鈕1這是開始打空間每一秒它應該像但當我嘗試再次單擊它關閉它的應用程序凍結並保持緊迫的空間。我嘗試了多種其他方式，但似乎無法弄清楚我是如何一次執行兩件事的，因爲我被鎖定在while循環中。

Answer 1

調用Thread.Sleep()會阻塞UI線程。嘗試使用異步/等待。

private async void button1_Click(object sender, EventArgs e) 
{ 
    globalVars.spacerunning = !globalVars.spacerunning; 

    while (globalVars.spacerunning) 
    { 
     await Task.Delay(1000); 
     SendKeys.Send(" "); 
    } 
} 

UPDATE：

你可以使用一個Timer來代替。

public class MainForm : Form 
{ 
    private Timer timer = new Timer() { Interval = 1000 }; 

    public MainForm() 
    { 
     /* other initializations */ 

     timer.Enabled = false; 
     timer.Tick += timer_Tick; 
    } 

    private void timer_Tick(object sender, EventArgs e) 
    { 
     SendKeys.Send(" "); 
    } 

    private void button1_Click(object sender, EventArgs e) 
    { 
     globalVars.spacerunning = !globalVars.spacerunning; 
     timer.Enabled = globalVars.spacerunning; 
    } 
}