honey the codewitch Posts - Answer Overflow

honey the codewitch

•Created by honey the codewitch on 12/18/2024 in #help

Looking for a better way to cancel on keypress from the console

I'm using the following code to trigger a cancellation token when the user presses a key. I had to use a thread, because some of these operations are long running, so I can't just check for keypresses between async calls. I feel like there has to be a better way than spawning a thread, but it's just not coming to me.

static void MonitorThreadProc(object state)
{
    var cts = (CancellationTokenSource)state;
    while(!Console.KeyAvailable)
    {
        Thread.Sleep(10);
    }
    cts.Cancel();
}
static async Task<int> Main(string[] args)
{
    if (args.Length < 2)
    {
        return -1;
    }
    var port = args[0];
    var path = args[1];
    try
    {
        using (var link = new EspLink(port))
        {
            var cts = new CancellationTokenSource();
            var mon = new Thread(new ParameterizedThreadStart(MonitorThreadProc));
            mon.Start(cts);

            var tok = cts.Token;
            Console.WriteLine("Press any key to cancel...");
            Console.Write("Connecting...");
            await Console.Out.FlushAsync();
            await link.ConnectAsync(true, 3, true, tok, link.DefaultTimeout, new EspProgress());
            Console.WriteLine("\bdone!");
            await Console.Out.FlushAsync();
                        ... // complete code is here https://pastebin.com/Cpu18pYm
            mon.Abort();
        }
        return 0;
    }
    catch (OperationCanceledException)
    {
        Console.WriteLine("Operation canceled by user. Device may be in invalid state.");
        return 1;
    }
}

static void MonitorThreadProc(object state)
{
    var cts = (CancellationTokenSource)state;
    while(!Console.KeyAvailable)
    {
        Thread.Sleep(10);
    }
    cts.Cancel();
}
static async Task<int> Main(string[] args)
{
    if (args.Length < 2)
    {
        return -1;
    }
    var port = args[0];
    var path = args[1];
    try
    {
        using (var link = new EspLink(port))
        {
            var cts = new CancellationTokenSource();
            var mon = new Thread(new ParameterizedThreadStart(MonitorThreadProc));
            mon.Start(cts);

            var tok = cts.Token;
            Console.WriteLine("Press any key to cancel...");
            Console.Write("Connecting...");
            await Console.Out.FlushAsync();
            await link.ConnectAsync(true, 3, true, tok, link.DefaultTimeout, new EspProgress());
            Console.WriteLine("\bdone!");
            await Console.Out.FlushAsync();
                        ... // complete code is here https://pastebin.com/Cpu18pYm
            mon.Abort();
        }
        return 0;
    }
    catch (OperationCanceledException)
    {
        Console.WriteLine("Operation canceled by user. Device may be in invalid state.");
        return 1;
    }
}

That's an excerpt. The whole code is here: https://pastebin.com/Cpu18pYm

45 replies

CC#

•Created by honey the codewitch on 11/15/2024 in #help

How to get a Type by string without specifying the assembly name, if it's among loaded asms

Okay, it's been forever since I had to do this in C#, but I need to get a Type by name without having to specify the assembly name, if it is among the currently loaded assemblies for the app domain. What's the best way to do this. Basically I want it to do what Type.GetType() does but a bit more permissive in that it searches all loaded assemblies instead of just the calling assembly when it comes to nonqualified names

3 replies

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