Generic Thread Start

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本文介绍了一个使用泛型的参数化线程启动委托及类，并通过具体示例展示了如何创建并启动带有不同类型参数的线程。示例中定义了一个通用的方法来处理不同类型的线程参数，并演示了如何为字符串和整数类型的参数分别创建和启动线程。

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// ParameterizedThreadStart.cs
public delegate void ParameterizedThreadStart<T>(T value);
 
// ParameterizedThread.cs
using System.Threading;
 
public class ParameterizedThread<T>
{
    private ParameterizedThreadStart<T> parameterizedThreadStart;
    private Thread thread;
 
    public ParameterizedThread(ParameterizedThreadStart<T> start)
    {
        parameterizedThreadStart = start;
        thread = new Thread(new ParameterizedThreadStart(Start));
    }
 
    public Thread Thread
    {
        get { return thread; }
    }
 
    private void Start(object obj)
    {
        parameterizedThreadStart.Invoke((T)obj); // Unboxing
    }
    public void Start(T value)
    {
        thread.Start(value); // Boxing
    }
}

示例：

using System;
using System.Threading;
 
class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Thread ID: {0}, Start", Thread.CurrentThread.ManagedThreadId);
        ParameterizedThread<string> threadOne = new ParameterizedThread<string>(
            new ParameterizedThreadStart<string>(WriteValue));
        ParameterizedThread<int> threadTwo = new ParameterizedThread<int>(
            new ParameterizedThreadStart<int>(WriteValue));
        threadOne.Start("Hello World");
        threadTwo.Start(123);
        Console.ReadKey();
    }
 
    static void WriteValue<T>(T value)
    {
        Console.WriteLine("Thread ID: {0}, {1}", Thread.CurrentThread.ManagedThreadId, value);
    }
}