7.带输入参数的线程启动 C# + WPF 完整示例

军训猫猫头2026-04-17 9:13

cs 复制代码

public class TestParams
{
    public int Delay { get; set; }
    public double Freq { get; set; }
    public int Channel { get; set; }
}

private void Button_Click_Start(object sender, RoutedEventArgs e)
{
    var paramList = new[]
    {
        new TestParams { Delay = 100, Freq = 1000, Channel = 1 },
        new TestParams { Delay = 200, Freq = 2000, Channel = 2 },
        new TestParams { Delay = 300, Freq = 3000, Channel = 3 },
        new TestParams { Delay = 400, Freq = 4000, Channel = 4 }
    };
    
    foreach (var p in paramList)
    {
        var localParam = p;  // 局部副本
        Thread t = new Thread(() => RunTest(localParam))
        {
            IsBackground = true
        };
        t.Start();
    }
}

private void RunTest(TestParams p)
{
    Thread.Sleep(p.Delay);
    Console.WriteLine($"通道 {p.Channel}: 完成");
}

这段代码展示了多线程参数传递 的一种封装方式，核心解决闭包陷阱 和多参数传递问题。

1. 参数封装类

cs 复制代码

public class TestParams
{
    public int Delay { get; set; }      // 延时时间 (ms)
    public double Freq { get; set; }    // 频率值 (Hz)
    public int Channel { get; set; }    // 通道编号
}

作用：将多个相关参数打包成一个对象，避免线程启动时的 object 装箱拆箱。

2. 参数数组初始化

cs 复制代码

var paramList = new[]
{
    new TestParams { Delay = 100, Freq = 1000, Channel = 1 },
    new TestParams { Delay = 200, Freq = 2000, Channel = 2 },
    new TestParams { Delay = 300, Freq = 3000, Channel = 3 },
    new TestParams { Delay = 400, Freq = 4000, Channel = 4 }
};

3. 局部副本

复制代码

foreach (var p in paramList)
{
    var localParam = p;  // ← 关键行！
    Thread t = new Thread(() => RunTest(localParam));
    ...
}

原理：foreach 的迭代变量 p 是同一变量 反复赋值，Lambda 捕获的是变量引用 而非值。局部副本 localParam 每次循环都是新变量。