一步一步学习C#中的多线程 --- 1、初识线程(2)--给线程传递参数

一步一步学习C#中的多线程 --- 1、初识线程(2)--给线程传递参数

给线程传递参数的三种方法

1、一种方式是使用ParameterizedThreadStart委托参数的Thread构造函数。参看如下代码:

 

 1:  using System;
 2:  using System.Collections.Generic;
 3:  using System.Linq;
 4:  using System.Text;
 5:  using System.Threading;
 6:  using System.Threading.Tasks;
 7:  namespace PassDataToThread
 8:  {
 9:      class Program
10:      {
11:          static void Main(string[] args)
12:          {
13:              Thread t1 = new Thread(printMessage);//省略写法
14:              Thread t2 = new Thread(new ParameterizedThreadStart(printMessage));//完整写法
15:              t1.Start("Hello MultThread!!");//传递参数
16:              t2.Start("Hello MuttThread");//传递参数
17:              Console.ReadKey();
18:          }
19:   
20:          static void printMessage(Object message)
21:          {
22:              string strMessage = (string)message;
23:              Console.WriteLine(strMessage);
24:          }
25:      }
26:  }
27:   
28:   

 

注意:   ParameterizedThreadStart 传递参数个数有限制,只能接收一个参数,并且由于其类型为object,通常需要转型。

2、使用Lambda表达式或匿名函数传递参数。参看如下代码:

 

 1:  using System;
 2:  using System.Collections.Generic;
 3:  using System.Linq;
 4:  using System.Text;
 5:  using System.Threading;
 6:   
 7:  namespace PassDataToThread
 8:  {
 9:      class Program
10:      {
11:          static void Main(string[] args)
12:          {
13:              Thread t1 = new Thread(() => Print("Hello Lambda Thread"));//通过Lambda传递参数
14:              t1.Start();
15:  
16:              Thread t2 = new Thread(delegate(){Print("Hello Delegate Method");});//通过匿名函数传递参数
17:              t2.Start();
18:          }
19:          static void Print(string message) {
20:              Console.WriteLine(message);
21:              Console.ReadKey();
22:          }
23:      }
24:  }
25:   
26:   

 

其实如果你查看编译后的代码会发现,这两种方法底层的实现方法是和第一种方法一致的。

3、定义一个类,将线程的主方法定义为类的一个实例方法。这样你就可以给Thread的构造函数传递对象和ThreadMain()方法。线程就可以访问数据了。

 

 1:  using System;
 2:  using System.Collections.Generic;
 3:  using System.Linq;
 4:  using System.Text;
 5:  using System.Threading;
 6:   
 7:  namespace PassDataToThread2
 8:  {
 9:      class Program
10:      {
11:          static void Main(string[] args)
12:          {
13:              MyThread mt = new MyThread("HelloWorld");
14:              Thread t1 = new Thread(mt.ThreadMain);
15:              t1.Start();
16:              Console.ReadKey();
17:          }
18:      }
19:   
20:      class MyThread
21:      {
22:          private string message;
23:          public MyThread(string message) 
24:          {
25:              this.message = message;
26:          }
27:          public void ThreadMain() 
28:          {
29:              Console.WriteLine(message);
30:          }
31:      }
32:  }

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