Question

C# 中如何使用timer进行背景图片定时切换

public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
BackgroundImage=Properties.Resources.wane;

BackgroundImage = Properties.Resources._1;

BackgroundImage = Properties.Resources._2;
｝
我想让这个三张背景图片在 button1被点击后 以一秒的间隔自行切换
进行循环和不循环切换我都想要， 谢谢了。

Answer 1

Timer t;
public Form1()
{
InitializeComponent();

Timer t = new Timer();
t.Interval = 1000;
t.Tick += new EventHandler(changeBackground);

button1.Text = "开始切换";
}
private void button1_Click(object sender, EventArgs e)
{
if (button1.Text == "开始切换")
{
t.Start();
button1.Text = "停止切换";
}
else
{
t.Stop();
button1.Text = "开始切换";
}
}

void changeBackground(object sender, EventArgs e)
{
int i = DateTime.Now.Second;
switch (i % 3)
{
case 0: BackgroundImage = Properties.Resources.wane; break;
case 1: BackgroundImage = Properties.Resources._1; break;
case 2: BackgroundImage = Properties.Resources._2; break;
default: break;
}
}

Answer 2

timer有个 tick方法
把你想操作的代码 写道这个方法里。然后设定一下 时间。自动就跑起来了。