C＃如何每1秒后更改Form1背景？

Question

是否有任何方法来改变窗口Form1中背景每1秒后，像这样：

Second 1: Yellow 
Second 2: Green 
Second 3: Yellow 
Second 4: Green 
... 

Answer 1

尝试这种情况：

 var timer = new Timer() { Interval = 1000, Enabled = true, }; 
     timer.Tick += (s, e) => 
      this.BackColor = 
        this.BackColor == Color.Green ? Color.Yellow : Color.Green; 

Answer 2

拖放一个定时器控制到Form1中

设置定时器间隔为1000毫秒（1秒） 。

private int caseSwitch = 0; 
private void timer1_Tick(object sender, EventArgs e) 
{ 
    caseSwitch++; 
    switch (caseSwitch) 
    { 
     case 1: 
      this.BackColor = Color.Yellow; 
      break; 
     case 2: 
      this.BackColor = Color.Green; 
      break; 
    } 

    if (caseSwitch == 2) caseSwitch = 0; 
} 

Answer 3

public Form1() 
    { 
     this.BackColor = Color.Green; 
     InitializeComponent(); 
     var timer = new Timer(); 
     timer.Interval = 1000; 
     timer.Tick += new EventHandler(timer_Tick); 
     timer.Start(); 
    } 

    void timer_Tick(object sender, EventArgs e) 
    { 
     var colors = new[] { Color.Yellow, Color.Green}; 
     var index = DateTime.Now.Second % colors.Length; 
     this.BackColor = colors[index]; 
    } 

Answer 4

正如杰里米所述

拖放一个定时器控制到Form1中和定时器间隔设定为1000毫秒>（即1秒）。

在计时器滴答的事件处理程序，逻辑可以是这样的，

private void timer1_Tick(object sender, EventArgs e) 
{ 
    if(this.BackColor == Color.Green) 
      this.BackColor = Color.Yellow; 
    else 
      this.BackColor = Color.Green; 
} 

Answer 5

private void button1_Click(object sender, EventArgs e) 
     { 
      timer1.Interval = 1000; 
      timer1.Enabled = true; 
      timer1.Tick += new EventHandler(timer1_Tick); 
      timer2.Interval = 1000; 
      timer2.Tick += new EventHandler(timer2_Tick); 
     } 

     private void timer1_Tick(object sender, EventArgs e) 
     { 
       txt_trp.BackColor = Color.Red; 
       txt_trm.BackColor = Color.Yellow; 
       timer2.Enabled = true; 
       timer1.Enabled = false; 
     } 
     private void timer2_Tick(object sender, EventArgs e) 
     { 
       txt_trp.BackColor = Color.Yellow; 
       txt_trm.BackColor = Color.Red; 
       timer1.Enabled = true; 
       timer2.Enabled = false; 
     }