所以我想找出一種方法來取消特定任務(wù)。在示例中，我想取消它生成的 3 個(gè)任務(wù)中的 2 個(gè)static async Task Main(string[] args){ var tasks = Enumerable.Range(0, 3).Select(x => Task.Run(() => { Counter(); })); await Task.WhenAll(tasks); Console.ReadLine();}public static void Counter(){ while (true) { for (int i = 0; i < 1000; i++) { Console.WriteLine(i); } }}如果我要這樣做while (someProperty)并更改someProperty為false然后所有線程都會(huì)停止。我想停止 2/3，我該怎么做？
1 回答
SMILET
TA貢獻(xiàn)1796條經(jīng)驗(yàn) 獲得超4個(gè)贊
CancellationToken如果你想單獨(dú)取消它們，你需要為你開始的每個(gè)任務(wù)傳遞一個(gè)：
static async Task Main(string[] args)
{
var cancellationSources = Enumerable.Range(0, 3)
.Select(_ => new CancellationTokenSource())
.ToList();
var tasks = Enumerable.Range(0, 3).Select(x => Task.Run(
() => Counter(cancellationSources[x].Token),
cancellationSources[x].Token
));
cancellationSources[1].Cancel();
await Task.WhenAll(tasks);
Console.ReadLine();
}
public static void Counter(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
// or while(true) and token.ThrowIfCancellationRequested(); to throw instead
for (int i = 0; i < 1000; i++)
{
Console.WriteLine(i);
}
}
}
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