c# - 等待数组中的第一个任务匹配条件

Question

我有一个 Task<bool>[] myTasks .我如何在第一个 Task 时得到通知(等待)返回 true ？

Answer 1

基本上，您需要保留一组未完成的任务，并重复使用 Task.WhenAny，检查结果，如果结果不是您想要的，则继续(删除该任务)正在寻找。例如:

ISet<Task<bool>> activeTasks = new HashSet<Task<bool>>(myTasks);
while (activeTasks.Count > 0)
{
    Task<bool> completed = await Task.WhenAny(activeTasks);
    if (completed.Status == TaskStatus.RanToCompletion &&
        completed.Result)
    {
        // Or take whatever action you want
        return;
    }
    // Task was faulted, cancelled, or had a result of false.
    // Go round again.
    activeTasks.Remove(completed);
}
// No successful tasks - do whatever you need to here.