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private async void Form1_Load(object sender, EventArgs e)
{
var task1= listView1.Items.Add("任务一");
倒计时(task1, TimeSpan.FromMinutes(1));
//模拟多个任务,第2任务延时30秒加入
await Task.Delay(TimeSpan.FromSeconds(30));
var task2 = listView1.Items.Add("任务二");
倒计时(task2, TimeSpan.FromMinutes(1));
}
public async Task 倒计时(ListViewItem item,TimeSpan timeSpan)
{
CancellationTokenSource cts=new CancellationTokenSource(timeSpan);
var subitem = item.SubItems.Add(timeSpan.ToString());
var ztitem = item.SubItems.Add("执行中");
while (!cts.IsCancellationRequested)
{
await Task.Delay(TimeSpan.FromSeconds(1));
timeSpan = timeSpan.Subtract(TimeSpan.FromSeconds(1));
subitem.Text = timeSpan.ToString();
}
ztitem.Text="执行完毕";
}
private void Form1_Load(object sender, EventArgs e)
{
var task1= listView1.Items.Add("任务一");
倒计时(task1, TimeSpan.FromMinutes(1));
}
public async Task 倒计时(ListViewItem item,TimeSpan timeSpan)
{
CancellationTokenSource cts=new CancellationTokenSource(timeSpan);
var subitem = item.SubItems.Add(timeSpan.ToString());
while (!cts.IsCancellationRequested)
{
await Task.Delay(TimeSpan.FromSeconds(1));
timeSpan = timeSpan.Subtract(TimeSpan.FromSeconds(1));
subitem.Text = timeSpan.ToString();
}
}