对线程比较陌生。我有这样的情况:
class Program
{
static void Main(string[] args)
{
List<NewsItem> newsItems = new List<NewsItem>();
for (int i = 0; i < 5; i++)
{
NewsItem item = new NewsItem(i.ToString());
newsItems.Add(item);
}
List<Thread> workerThreads = new List<Thread>();
foreach (NewsItem article in newsItems)
{
Console.WriteLine("Dispatching: " + article.Headline);
Thread thread = new Thread(() =>
{
Console.WriteLine("In thread:" + article.Headline);
});
workerThreads.Add(thread);
thread.Start();
}
foreach (Thread thread in workerThreads)
{
thread.Join();
}
Console.ReadKey();
}
}
class NewsItem
{
public string Headline { get; set; }
public NewsItem(string headline)
{
Headline = headline;
}
}
在运行时,它总是给我这个:
Dispatching: 0
Dispatching: 1
Dispatching: 2
In thread: 2
Dispatching: 3
In thread: 3
In thread: 2
Dispatching: 4
In thread: 4
In thread: 4
换句话说,线程参数不是我所期望的。
我猜我可以通过使用 ParameterizedThreadStart 委托而不是匿名 lambda 表达式来解决这个问题,但我仍然很想知道为什么它会像它那样工作(或者更确切地说,不能按预期工作)?
谢谢!
史蒂夫