索引超出了 c# 中 Threadpool 中的数组范围

Question

我使用线程池在 c# 中创建了一个简单的程序，同时我将线程号作为参数传递，但我得到了异常（运行时异常（第 19 行）：索引超出了数组的范围。）

using System;
using System.Threading; 
using System.Linq;

public class Program
{
        private const byte TotalNoOfThread=10;
        private int[] arrThreadRowProcessed;
        private bool[] arrThreadRowIsCompleted;
        private void ResetThread()
        {
            arrThreadRowProcessed = new int[TotalNoOfThread];
            arrThreadRowIsCompleted = new bool[TotalNoOfThread];
        }
    
        private  void TuroverDayWise(int ThreadNo)
        {
            Console.WriteLine("From THread ="+ThreadNo);
            arrThreadRowIsCompleted[ThreadNo] = true; //Geting error on this point Index value show 10 but how
        }
        public void TuroverDayWise()
        {
            ResetThread();
            Console.WriteLine("Reset the Data..");
            for (int i = 0; i < TotalNoOfThread; i++)
            {
                ThreadPool.QueueUserWorkItem(new WaitCallback(x=>TuroverDayWise(i)));
            }
            while (arrThreadRowIsCompleted.Any(p => !p))
            {
                Thread.Sleep(2000);                
            }

        }
    
    public static void Main()
    {
        Program obj= new Program();         
        obj.TuroverDayWise();
    }
}

Answer 1

在这一行……​​

ThreadPool.QueueUserWorkItem(new WaitCallback(x=>TuroverDayWise(i)));

在调用它时使用 i 的当前值（在外部递增），而不是该值。您可以尝试将 i 值保存在临时变量中，这应该可以：

        for (int i = 0; i < TotalNoOfThread; i++)
        {
            int local = i;
            ThreadPool.QueueUserWorkItem(new WaitCallback(x => TuroverDayWise(local)));
        }