ThreadStart和ParameterizedThreadStart區(qū)別

ThreadStart：

ThreadStart這個委托定義為void ThreadStart(),也就是說,所執(zhí)行的方法不能有參數(shù)。

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);   }

這里我們用定義了一個ThreadStart類型的委托,這個委托制定了線程需要執(zhí)行的方法: Calculate,在這個方法里計算了一個直徑為0.5的圓的周長,并輸出.這就構(gòu)成了最簡單的多線程的例子,在很多情況下這就夠用了

ParameterThreadStart：

ParameterThreadStart的定義為void ParameterizedThreadStart(object state)，使用這個這個委托定義的線程的啟動函數(shù)可以接受一個輸入?yún)?shù),具體例子如下 ：

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方法有一個為object類型的參數(shù),雖然只有一個參數(shù),而且還是object類型的,使用的時候尚需要類型轉(zhuǎn)換,但是好在可以有參數(shù)了,并且通過把多個參數(shù)組合到一個類中,然后把這個類的實例作為參數(shù)傳遞,就可以實現(xiàn)多個參數(shù)傳遞.比如:

class AddParams{    public int a, b;    public AddParams(int numb1, int numb2)    {      a = numb1;      b = numb2;    }}#endregionclass 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}}