C# 線程傳參，

C# 線程傳參，

傳參方式有兩種：

       1、創建帶參構造方法類 傳參

       2、利用Thread.start（8）直接傳參，該方法會接收一個對象，並將該對象傳遞給線程，因此在線程中啟動的方法

             必須接收object類型的單個參數。

       3、閉包傳參 該方法使用lambda表達式。

           3.1 lambda表達式中使用任何局部變量時 ,C# 會自動生成一個類，並將該變量作為該類的一個屬性。實際上與第一種方式基本一樣，但是我們無需定義類，C#會自動編譯實現該類。

           3.2 使用lambda表達式會導致一些問題，如使用多個lambda表達式中使用相同的變量，他們會共享該變量值

using System;
using System.Threading;

namespace testThread_Transferparameters
{
    class Program
    {
        static void Main(string[] args)
        {
            
            //1
            var sample = new ThreadSample(10);
            var threadone = new Thread(sample.CountNumbers);
            threadone.Name = "ThreadOne";
            threadone.Start();
            threadone.Join();
            Console.WriteLine("------------------");
             
            //2
            var threadtwo = new Thread(count);
            threadtwo.Name = "threadtwo";
            threadtwo.Start(8);
            threadtwo.Join();
            Console.WriteLine("------------------");
            
             //3
            var threadthree = new Thread(() => CountNumbers(20));
            threadthree.Name = "threadthree";
            threadthree.Start();
            threadthree.Join();
            Console.WriteLine("------------------");

            int i = 10;
            var threadfour = new Thread(() => PrintNumber(i));
            i = 20;
            var threadfive = new Thread(() => PrintNumber(i));
            threadfour.Start();
            threadfive.Start();
        }
        static void count(object iterations)
        {
            CountNumbers((int)iterations);
        }
        static void CountNumbers(int iterations)
        {
            for (int i = 1; i <= iterations; i++)
            {
                Thread.Sleep(TimeSpan.FromSeconds(0.5));
                Console.WriteLine("{0} prints {1}", Thread.CurrentThread.Name, i);
            }
        }
        static void PrintNumber(int number)
        {
            Console.WriteLine(number);
        }
    }

    class ThreadSample
    {
        private readonly int _iterations;
        public ThreadSample(int iterations)
        {
            _iterations = iterations;
        }
        public void CountNumbers()
        {
            for (int i = 1; i <= _iterations; i++)
            {
                Thread.Sleep(TimeSpan.FromSeconds(0.5));
                Console.WriteLine("{0} prints {1}", Thread.CurrentThread.Name, i);
            }
        }
    }
}

 結果如下：