C# 執行緒系列講座 (2)：Thread 參數傳遞完整指南

ParameterizedThreadStart 委派

[ComVisible(false)]
public delegate void ParameterizedThreadStart(object obj);
public Thread(ParameterizedThreadStart start);

靜態方法傳遞單一參數

static void ParamMethod(object obj) => Console.WriteLine(obj);
static void Main() {
    new Thread(ParamMethod).Start("委派參數傳值");
}

注意事項

• 無參數委派 (ThreadStart) 不可呼叫帶參數 Start(obj)，會拋出例外
• 帶參數委派可呼叫無參數 Start()，參數接收 null

封裝類別傳遞多參數

class MyData {
    private string d1; private int d2;
    public MyData(string d1, int d2) { this.d1 = d1; this.d2 = d2; }
    public void ThreadMethod() { Console.WriteLine(d1); Console.WriteLine(d2); }
}
new Thread(new MyData("abcd", 1234).ThreadMethod).Start();

MyThread 基底類別

abstract class MyThread {
    private Thread thread;
    public abstract void Run();
    public void Start() {
        if (thread == null) thread = new Thread(Run);
        thread.Start();
    }
}

繼承 MyThread 並覆寫 Run() 即具備多執行緒能力，建構函式可注入任意複雜參數。