步骤:
第一步，创建项目(MVC版本的),然后再创建SignalR
第二步：引入JS和引入 <script src="~/signalr/hubs"></script> 尤其重要；
第三步:在控制器中创建方法:
第四步: 在Startup类别中配置
public void Configuration(IAppBuilder app)
{
// 有关如何配置应用程序的详细信息，请访问 https://go.microsoft.com/fwlink/?LinkID=316888
app.MapSignalR();
}
源码:
前端：
<script src="~/Scripts/jquery-3.4.1.js"></script>
<script src="~/Scripts/jquery.signalR-2.2.2.js"></script>
<script src="~/signalr/hubs"></script>
<textarea id="msg">
</textarea>
<button οnclick="Send()">
发送
</button>
<script type="text/javascript">
//$.connection.hub.url = "http://localhost:8889/signalr";
var chat = $.connection.myHub;
chat.client.getMessage = function (msg) {
//向页面添加消息
alert(msg);
}
// 开始连接服务器
$.connection.hub.start().done(function () {
console.log("链接成功");
});
function Send() {
$.ajax({
url: "/Home/Msg?msg="+$("#msg").val()
});
}
</script>
<div>
<h5>消息提示</h5>
</div>
后端:
using Microsoft.AspNet.SignalR;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace Message.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public ActionResult About()
{
ViewBag.Message = "Your application description page.";
return View();
}
public ActionResult Contact()
{
ViewBag.Message = "Your contact page.";
return View();
}
public string Msg(string msg ) {
try
{
IHubContext _hubContext = GlobalHost.ConnectionManager.GetHubContext<MyHub>();
_hubContext.Clients.All.getMessage(msg);
return "发送成功";
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}
}
}
在startup中配置
using System;
using System.Threading.Tasks;
using Microsoft.Owin;
using Owin;
[assembly: OwinStartup(typeof(Message.Startup))]
namespace Message
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
// 有关如何配置应用程序的详细信息，请访问 https://go.microsoft.com/fwlink/?LinkID=316888
app.MapSignalR();
}
}
}