C#•2y ago

✅ Unsubscribing from all events

Okay, to make it short, I need to unsubscribe from an anonymous event and the way I thought would work would just to unsub from all by using .GetInvocationList() but it appears it just doesn't exist, can anyone give a tip on how to do it ?

19 Replies

justaeris•2y ago

@Windows10CE thought I'd ping you if you don't mind

Aaron•2y ago

what was ph in that small snippet you sent actually, could you just throw it all in $paste

MODiX•2y ago

If your code is too long, you can post to https://paste.mod.gg/ and copy the link into chat for others to see your shared code!

justaeris•2y ago

    public static async Task Download(Action<HttpProgressEventArgs>? onDataReceived = null, CancellationToken cancellationToken = default)
    {
        const string url = "https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-windows-amd64.zip";
        var path = Environment.CurrentDirectory;
        var zipPath = path + "\\ngrok-stable-windows-amd64.zip";
        var ngrokPath = path + "\\ngrok.exe";

        if (!Directory.Exists(path)) Directory.CreateDirectory(path);

        if (File.Exists(ngrokPath)) return;

        var handler = new HttpClientHandler { AllowAutoRedirect = true };
        var ph = new ProgressMessageHandler(handler);

        ph.HttpReceiveProgress += delegate(object? _, HttpProgressEventArgs args) { onDataReceived?.Invoke(args); };

        using var client = new HttpClient(ph);
        await client.GetAsync(url, cancellationToken);
        // Read the incoming stream using a zip stream to decompress and save the file at the same time

        var stream = await client.GetStreamAsync(url, cancellationToken);
        // Unsubscribe from all events by getting the event list and clearing it
        ph.HttpReceiveProgress.GetInvocationList().ToList().ForEach(x => ph.HttpReceiveProgress -= (HttpProgressEventHandler)x);

        using var zipStream = new ZipArchive(stream, ZipArchiveMode.Read);
        var entry = zipStream.Entries[0];
        entry.ExtractToFile(ngrokPath, true);
        File.Delete(zipPath);
        File.Create("ngrok.yml");
      }

    public static async Task Download(Action<HttpProgressEventArgs>? onDataReceived = null, CancellationToken cancellationToken = default)
    {
        const string url = "https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-windows-amd64.zip";
        var path = Environment.CurrentDirectory;
        var zipPath = path + "\\ngrok-stable-windows-amd64.zip";
        var ngrokPath = path + "\\ngrok.exe";

        if (!Directory.Exists(path)) Directory.CreateDirectory(path);

        if (File.Exists(ngrokPath)) return;

        var handler = new HttpClientHandler { AllowAutoRedirect = true };
        var ph = new ProgressMessageHandler(handler);

        ph.HttpReceiveProgress += delegate(object? _, HttpProgressEventArgs args) { onDataReceived?.Invoke(args); };

        using var client = new HttpClient(ph);
        await client.GetAsync(url, cancellationToken);
        // Read the incoming stream using a zip stream to decompress and save the file at the same time

        var stream = await client.GetStreamAsync(url, cancellationToken);
        // Unsubscribe from all events by getting the event list and clearing it
        ph.HttpReceiveProgress.GetInvocationList().ToList().ForEach(x => ph.HttpReceiveProgress -= (HttpProgressEventHandler)x);

        using var zipStream = new ZipArchive(stream, ZipArchiveMode.Read);
        var entry = zipStream.Entries[0];
        entry.ExtractToFile(ngrokPath, true);
        File.Delete(zipPath);
        File.Create("ngrok.yml");
      }

fits in here unless you really want it in $paste

MODiX•2y ago

If your code is too long, you can post to https://paste.mod.gg/ and copy the link into chat for others to see your shared code!

Aaron•2y ago

ah, it's not your class then all you can do really is keep track of your subscriptions yourself, or use reflection why do you need to unsubscribe anyway?

justaeris•2y ago

because for some unknown reasons, it reapeats the progress two times I mean I kndi know why but not how to fix it

Aaron•2y ago

I don't think this will fix it

justaeris•2y ago

like it does 0 to 100 when it downloads the files and 0 to 100 again when it's reading the stream, copying or whatever operation on it

Aaron•2y ago

you could try just having a bool that says whether to handle the event or not and check that in your delegate

justaeris•2y ago

oh oh btw whats the difference between ph.HttpReceiveProgress += delegate(object? _, HttpProgressEventArgs args) { onDataReceived?.Invoke(args); }; and ph.HttpReceiveProgress += (sender, args) => onDataReceived?.Invoke(args);

Aaron•2y ago

the first is just older syntax I'd always do the second one

justaeris•2y ago

oh okay thanks for the tip I'll try the bool to see if it fixes it

justaeris•2y ago

https://i.imgur.com/Mlil0oO.png

Imgur

justaeris•2y ago

Aaron•2y ago

idk why that's given as a warning should work fine

justaeris•2y ago

and it does bar just stays full for a long period of time now gotta find some sketchy workaround Task.Run moment nah I think it's fine or wait hold my beer bro I'm so smart

...
var handle = true;
        ph.HttpReceiveProgress += (_, args) =>
        {
            if (handle) onDataReceived?.Invoke(args);
        };

        using var client = new HttpClient(ph);
        await client.GetAsync(url, cancellationToken);
        handle = false;
        onDataReceived?.Invoke(new HttpProgressEventArgs(-1, null, 0, 0));
...

...
var handle = true;
        ph.HttpReceiveProgress += (_, args) =>
        {
            if (handle) onDataReceived?.Invoke(args);
        };

        using var client = new HttpClient(ph);
        await client.GetAsync(url, cancellationToken);
        handle = false;
        onDataReceived?.Invoke(new HttpProgressEventArgs(-1, null, 0, 0));
...

...
Dispatcher.Invoke(() =>
                {
                    if (args.ProgressPercentage == -1)
                        OverallProgressBar.IsIndeterminate = true;
                    else
                    {
                        OverallProgressBar.IsIndeterminate = false;
                        OverallProgressBar.Value = args.ProgressPercentage;
                    }
                    parent.TaskbarItemInfo.ProgressValue = args.ProgressPercentage / 100f;
                });
...

...
Dispatcher.Invoke(() =>
                {
                    if (args.ProgressPercentage == -1)
                        OverallProgressBar.IsIndeterminate = true;
                    else
                    {
                        OverallProgressBar.IsIndeterminate = false;
                        OverallProgressBar.Value = args.ProgressPercentage;
                    }
                    parent.TaskbarItemInfo.ProgressValue = args.ProgressPercentage / 100f;
                });
...

kinda cheating but it works just fine thanks again for your help and time you can close the thread if you can once you saw this

Anton•2y ago

unsubbing all = setting to null isn't that allowed with events? yeah ig probably not

Aaron•2y ago

not if you're not in the declaring class

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✅ Unsubscribing from all events