Strong typed C# SignalR client

[ViacheslavUKR]

Now I use only standard snippets of receive SignalR message in Blazor frontend.

    HubConnection connection;
    string userName = "";
    string message = "";
    IList<string> messages = new List<string>();

    async Task Connect()
    {
        connection = new HubConnectionBuilder().WithUrl(Program.ApiUrl + "OutputMessages", opt => opt.Headers.Add("Authorization", JWT)).
            WithAutomaticReconnect(new[] { TimeSpan.Zero, TimeSpan.Zero, TimeSpan.FromSeconds(10) }).
            Build();
        connection.On<string, string, Boolean>("AdminMessages2", async (a,b,c)=> await ReceiveMessage(a,b,c));
        connection.Closed += async (error) =>
        {
            await Task.Delay(new Random().Next(0, 5) * 1000);
            await connection.StartAsync();
        };
        await connection.StartAsync();
    }

    Task ReceiveMessage(string UserId, string message, Boolean b)
    {
        messages.Add(UserId + " : " + message);
        StateHasChanged();
        return Task.CompletedTask;
    }

It working fine, but I'm sorry, I don't understand how is possible to use in my C# client my strong type SignalR protocol.

    public interface IOutputMessages
    {
        Task AdminMessages(string message, bool? consoleOnly);
        Task AdminMessages2(string userId, string message, bool consoleOnly);
        Task CrossServerNotice(string discordId, string server, string message);
....
    }

Extension with method name as parameters is missing? How is possible to embed my protocol to client? What is the right way?

[davidfowl]

There's no such thing as a strongly typed C# client

[ViacheslavUKR]

what does it means? I don't understand.

My Hub realize this interface.

public interface IOutputMessages
    {
        Task AdminMessages(string message, bool? consoleOnly);
        Task AdminMessages2(string userId, string message, bool consoleOnly);
        Task CrossServerNotice(string discordId, string server, string message);
        Task NewDepositNotice(string discordId, string coin, double amount, int confirms, bool complete);
        Task NewMasternodePayoutNotice(string discordId, string pool, double costpershare, int shares, double payoutpershare, double newBalance);
        Task NewSharePurchase(string discordId, string pool, double costpershare, int shares, double total, int newcount);
        Task NewShareSale(string discordId, string pool, double costpershare, int shares, double total);
        Task OnConnectedAsync();
        Task OnDisconnectedAsync(Exception exception);
        Task SendUserMessage(string discordId, Guid containerId, string message);
        Task SendUserMessageNoContainer(string discordId, string message);
        Task UserPayoutNotice(string discordId, string server, string message);
    }

One message has one paremeter, another two parameters, another - three parameters. Each parameters has own type. My client written in C#. It's seem to reasonable to get this interface is input of something client class and receive tuned client.

It you would be answer that typed client still not realized or your team will be not realized in future, it will be more understandable. Because any other communication has typed client.

but ok. Thank you for answer.

[davidfowl]

Sure, it would be a nice feature and we want to do it in the future, but there currently isn't a feature like this. Follow this issue #15198

[ViacheslavUKR]

Thank you, David. I understand you.