I can't connect to my Signalr resource using HubConnectionBuilder with the endpoint

Question

Good day, I have created my Signalr resource, I have my hostname and my endpoint, then I make a connection from a WPF test application with the following code:

HubConnection _connection = new HubConnectionBuilder().WithUrl("https://signalresource***.service.signalr.net").Build();

_connection.On<string, string>("ReceiveMessage", (user, message) =>{Dispatcher.Invoke(() =>{string aa = message;});});

await _connection.StartAsync(); //connection's error

but I get a connection error, I do not use tokens, the connectivity to the hostname provided by the Azure portal does indicate successful but the endpoint returns an error. Please can someone help me solve or do I need to configure something in signalr, I have only created the resource and tested the connection. Thanks you!

Answer 1

Hi @Solucion Distribucion we're sorry to hear you're facing this issue. It looks like this is a potential configuration issue with your SignalR connection. Here are some troubleshooting steps to examine and resolve the problem:

• SignalR targets ES6. For browsers that don't support ES6, transpile the library to ES5. For more information, see Getting Started with ES6 – Transpiling ES6 to ES5 with Traceur and Babel. So make sure that both the SignalR client and server are using compatible versions. Mismatched versions can sometimes cause connection issues.
• Check the logs and error messages for more details. Sometimes, the error messages can provide specific information about what might be going wrong.
• Ensure you've created a SignalR Hub in your backend application that matches the hub name you're referencing in the code ("ReceiveMessage").
• Make sure that there are no firewall or network issues blocking the connection. This includes checking any proxies or firewalls that might be in place.

Best,

Grace