在C#中使用類golang通道編程（一）

static void SimpleMessage()
{
    var channel = new Channel<String>();
    Task.Run(async () => {
        await channel.SendAsync("Hello World!");
    });
    var message = channel.Receive();
    Console.WriteLine(message);
}

在上面這個例子中，我們在TPL Task中通過通道發送消息。主線程通過Receive接收消息。這裡，由於我們的SimpleMessage方法不是一個async方法，我們不能使用ReceiveAsync來接收消息。

static void ChannelSychronization() 
{
    var channel = new Channel<bool>();
    Task.Run(async () => {
        Console.Write("Working...");
        await Task.Delay(1000);
        Console.WriteLine("done");
        await channel.SendAsync(true);
    });
    channel.ReceiveAsync().Wait();
}

在這個例子中，主線程被ReceiveAsync堵塞，當TPL Task發送消息後，程式才結束。

static void Select() 
{
    var channel1 = new Channel<String>();
    var channel2 = new Channel<String>();

    Task.Run(async () => {
        await Task.Delay(1000);
        await channel1.SendAsync("one");
    });
    Task.Run(async () => {
        await Task.Delay(2000);
        await channel1.SendAsync("two");
    });

    for (var i = 0; i < 2; i++) 
    {
        new Select()
            .OnReceive(channel1, msg1 => {
                Console.WriteLine("received " + msg1);
            })
            .OnReceive(channel2, msg2 => {
                Console.WriteLine("received " + msg2);
            }).ExecuteAsync().Wait();
    }
}

在上面的例子中，我們通過Select同時從兩個通道channel1和channel2接收信息。