How to listen to all callbacks from the server to client in SignalR?

user_1394710 0
Viewed 788

To register a callback for a specific method in SignalR (JavaScript), you can do the following:

hubConnection.on("MyMethod", (...) => { ... });

However, is it possible to be able to listen to all methods and to get all arguments?

asp.net-core-signalr signalr javascript
1 Answers

I don't believe so because you have to register all of your callbacks before starting the connection. This example from the docs shows this.

"use strict";

var connection = new signalR.HubConnectionBuilder().withUrl("/chatHub").build();

//Disable send button until connection is established
document.getElementById("sendButton").disabled = true;

connection.on("ReceiveMessage", function (user, message) {
    var msg = message.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
    var encodedMsg = user + " says " + msg;
    var li = document.createElement("li");
    li.textContent = encodedMsg;
    document.getElementById("messagesList").appendChild(li);
});

connection.start().then(function () {
    document.getElementById("sendButton").disabled = false;
}).catch(function (err) {
    return console.error(err.toString());
});

document.getElementById("sendButton").addEventListener("click", function (event) {
    var user = document.getElementById("userInput").value;
    var message = document.getElementById("messageInput").value;
    connection.invoke("SendMessage", user, message).catch(function (err) {
        return console.error(err.toString());
    });
    event.preventDefault();
});
user_62635140
Related