一、前段代码：
@{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>Index</title> </head> <body> <div class="container"> <div class="row"> </div> <div class="row"> <div class="col-6"> </div> <div class="col-6"> User..........<input type="text" id="userInput" /> <br /> Message...<input type="text" id="messageInput" /> <input type="button" id="sendButton" value="Send Message" /> </div> </div> <div class="row"> <div class="col-12"> <hr /> </div> </div> <div class="row"> <div class="col-6"> </div> <div class="col-6"> <ul id="messagesList"></ul> </div> </div> </div> <script src="~/lib/signalr/dist/browser/signalr.js"></script> <script type="text/javascript"> "use strict"; var connection = new signalR.HubConnectionBuilder().withUrl("/signalr").build(); //在建立连接之前禁用发送按钮 document.getElementById("sendButton").disabled = true; //接受消息 connection.on("ReceiveMessage", function (user, message) { var msg = message.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">"); var encodedMsg = user + " says " + msg; var li = document.createElement("li"); li.textContent = encodedMsg; document.getElementById("messagesList").appendChild(li); }); //开始链接 connection.start().then(function () { document.getElementById("sendButton").disabled = false; }).catch(function (err) { return console.error(err.toString()); }); //发送消息 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(); }); </script> </body> </html>
原本var connection = new signalR.HubConnectionBuilder().withUrl("/chatHub").build();//这种是在项目内的Hub文件夹内的charHub类指定的方式
更改var connection = new signalR.HubConnectionBuilder().withUrl("/signalr").build(); //类库的名称signalr
二、Startup.cs配置文件
app.UseSignalR(routes => { routes.MapHub<ChatHub>("/SignalR"); //可以多个map });
原本 routes.MapHub<ChatHub>("/chatHub"); //可以多个map ChatHub位于
原因是因为：
