C# System.Threading.Timer TimerCallback 委托带参数？
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System.Threading.Timer TimerCallback delegate with parameters?
提问by Crazywako
I need to pass the following int dldnowto sendData static method / delegate.
我需要将以下内容传递int dldnow给 sendData 静态方法/委托。
public int dldnow;
Timer timer = new Timer(new TimerCallback(sendData), null, 1000*30, 1000*30);
public static void sendData(object obj)
{
string imageCount = (string)dldnow;
string imageCountJson = wc.DownloadString("http://*********/u.php?count=" + imageCount);
}
采纳答案by alex
If you want to pass it once, use a second constructor parameter:
如果要传递一次，请使用第二个构造函数参数：
System.Threading.Timer(new TimerCallback(sendData), dldnow, 1000*30, 1000*30);
If you want to access it regularly, you can make a static volatile field:
如果你想定期访问它，你可以制作一个静态的 volatile 字段：
public static volatile int dldnow;
(volatile is need so that it would be always up to date when accessed from multiple threads)
（需要 volatile 以便从多个线程访问时它始终是最新的）
