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("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

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

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

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