使用參數化功能的線程在C＃

Question

你好，這是我的多線程代碼，它工作正常

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 
using System.Net; 
using System.Threading; 

namespace searchIpAdresses 
{ 
    public partial class frmSearchIpRange : Form 
    { 
     public frmSearchIpRange() 
     { 
      InitializeComponent(); 
     } 

     int intStartIp, intEndIp; 

     private void frmSearchIpRange_Load(object sender, EventArgs e) 
     { 
      startIp.Text = "0.0.0.0"; 
      endIp.Text = "0.1.0.0"; 
      nudThreads.Value = 1; 
     } 

     private bool calcIpAddressRange() 
     { 
      intStartIp = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(IPAddress.Parse(startIp.Text).GetAddressBytes(), 0)); 
      intEndIp = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(IPAddress.Parse(endIp.Text).GetAddressBytes(), 0)); 
      if (intStartIp>intEndIp) 
      { 
       MessageBox.Show("End Ip must be bigger than Begin Ip!"); 
       return false; 
      } 
      else 
      { 
       return true; 
      } 
     } 

     private void btnShow_Click(object sender, EventArgs e) 
     { 
      if (calcIpAddressRange()) 
      { 
       int threadCount = Convert.ToInt32(nudThreads.Value); 
       Thread[] threads = new Thread[threadCount];    

       for (int i = 0; i < threadCount; i++) 
       { 
        threads[i] = new Thread(new ThreadStart(getPerformance));     
        threads[i].Name = string.Format(i.ToString()); 
       } 

       foreach (Thread t in threads) 
       { 
        t.Start(); 
       } 

       //for (int i = 0; i < nudThreads.Value; i++) 
       //{ 
       // if (threads[i].IsAlive) 
       //  threads[i].Abort(); 
       //} 
      } 

     } 

     private void getPerformance()//int sampleStartIp, int sampleEndIp 
     { 
      if (calcIpAddressRange()) 
      { 
       lbAddress.Items.Clear(); 
       progressBar1.Maximum = intEndIp - intStartIp; 
       int i; 
       for (i = intStartIp; i < intEndIp; i++) 
       { 
        string ipAddress = new IPAddress(BitConverter.GetBytes(IPAddress.NetworkToHostOrder(i))).ToString(); 

        progressBar1.Value++; 
        lbAddress.Items.Add(ipAddress); 
       } 
       MessageBox.Show(i.ToString() + " addresses added", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information); 
       progressBar1.Value = 0; 
      } 
     } 
    } 
} 

，但我想在getPerformance功能拆分工作。所以我在這種情況下，Visual Studio中使用它像

threads[i] = new Thread(new ThreadStart(getPerformance(sampleStart, sampleEnd)))

等給了我錯誤「預期的方法名」。解決辦法是什麼 ？

編輯：我試過，但我想不出它適應陣列格式工作@Henk Holterman

Thread[] threads = new Thread[threadCount];    

       for (int i = 0; i < threadCount; i++) 
       { 
        //threads[i] = new Thread(new ThreadStart(getPerformance));     
        threads[i].Name = string.Format(i.ToString()); 

        Thread t = new Thread(() => getPerformance(intStartIp, intEndIp)); 
       } 

       foreach (Thread t in threads) 
       { 
        t.Start(); 
       } 

Answer 1

1）你也許應該使用線程池或任務（FX4）。

2）當你可以使用 代表 lamba'a（.NET 3及更高版本）

int a=1, b=2; 
    Thread t = new Thread(() => Worker(a, b)); 

對於老版本，你可以使用ParameterizedThreadStart和輔助對象持有起點和終點。

---

編輯，以適應你的循環：

for (int i = 0; i < threadCount; i++) 
{ 
    // some code to update intStartIp, intEndIp 

    //threads[i] = new Thread(new ThreadStart(getPerformance));     
    threads[i] = new Thread(() => getPerformance(intStartIp, intEndIp)); 
    threads[i].Name = string.Format(i.ToString()); 
} 

Answer 2

可以使用ParameterizedThreadStart傳遞對象到調用的方法