ThreadStart:
ThreadStart这个委托定义为void ThreadStart(),也就是说,所执行的方法不能有参数。
class="csharp">ThreadStart threadStart=new ThreadStart(Calculate); Thread thread=new Thread(threadStart); thread.Start(); public void Calculate() { double Diameter=0.5; Console.Write("The Area Of Circle with a Diameter of {0} is {1}"Diameter,Diameter*Math.PI); }
这里我们用定义了一个ThreadStart类型的委托,这个委托制定了线程需要执行的方法: Calculate,在这个方法里计算了一个直径为0.5的圆的周长,并输出.这就构成了最简单的多线程的例子,在很多情况下这就够用了
ParameterThreadStart:
ParameterThreadStart的定义为void ParameterizedThreadStart(object state),使用这个这个委托定义的线程的启动函数可以接受一个输入参数,具体例子如下 :
ParameterizedThreadStart threadStart=new ParameterizedThreadStart(Calculate) Thread thread=new Thread() ; thread.Start(0.9); public void Calculate(object arg) { double Diameter=double(arg); Console.Write("The Area Of Circle with a Diameter of {0} is {1}"Diameter,Diameter*Math.PI); }
Calculate方法有一个为object类型的参数,虽然只有一个参数,而且还是object类型的,使用的时候尚需要类型转换,但是好在可以有参数了,并且通过把多个参数组合到一个类中,然后把这个类的实例作为参数传递,就可以实现多个参数传递.比如:
class AddParams { public int a, b; public AddParams(int numb1, int numb2) { a = numb1; b = numb2; } } #endregion class Program { static void Main(string[] args) { Console.WriteLine("***** Adding with Thread objects *****"); Console.WriteLine("ID of thread in Main(): {0}", Thread.CurrentThread.ManagedThreadId); AddParams ap = new AddParams(10, 10); Thread t = new Thread(new ParameterizedThreadStart(Add)); t.Start(ap); Console.ReadLine(); } #region Add method static void Add(object data) { if (data is AddParams) { Console.WriteLine("ID of thread in Main(): {0}", Thread.CurrentThread.ManagedThreadId); AddParams ap = (AddParams)data; Console.WriteLine("{0} + {1} is {2}", ap.a, ap.b, ap.a + ap.b); } } #endregion } }