线程中的参数传递

使用类、类的方法或类的属性都可以向线程传递参数：

public class UrlDownloader
{
string url;

public UrlDownloader (string url)
{
this.url = url;
}

public void Download()
{ WebClient wc = new WebClient(); Console.WriteLine("Downloading " + url);
byte[] buffer = wc.DownloadData (url);
string download = Encoding.ASCII.GetString(buffer);
Console.WriteLine(download);
Console.WriteLine("Download successful.");
//这里你可以将download进行保存等处理......
}
}

[... 在另一个类中使用它们...]

UrlDownloader downloader = new UrlDownloader (yourUrl);
new Thread (new ThreadStart (downloader.Download)).Start();

注意参数是如何传递的。

在.NET 2.0中还可以这样：

(CODE-BESIDE）方式一：
ThreadStart starter = delegate { Download(yourUrl); });
new Thread(starter).Start();//使用线程池
WaitCallback callback = delegate (object state) { Download ((string)state); };
ThreadPool.QueueUserWorkItem (callback, yourUrl);

方式二(使用ParameterizedThreadStart)：
Thread t = new Thread (new ParameterizedThreadStart(DownloadUrl));
t.Start (myUrl);

static void DownloadUrl(object url)
{
// ....}