asp.net MVC 使用signalR +bootstrap 实现 progressBar

View 

@{
    ViewBag.Title = "Progress bar test";
}
@section scripts {


    <script src="~/Scripts/jquery.signalR-2.2.0.min.js"></script>
    <!--Reference the autogenerated SignalR hub script. -->
    <script src="~/signalr/hubs"></script>


    <script>
        $(function () {
            // Reference the auto-generated proxy for the hub.
            var proxy = $.connection.aMockThreadHub; // !!!!must start with lower case !!
            // Create a function that the hub can call back to display messages.
            proxy.client.updateProgress = function (status) {
                status |= 0;
                // Add the message to the page.
                $('#progress-bar').css("width", status + "%");
                $("#progress-text").html(status + "%");
            };
            $.connection.hub.start().done(function () {


            });
        });
        // This optional function html-encodes messages for display in the page.
    </script>
}




<div class="progress" style="margin-top: 200px">
    <div class="progress-bar" id="progress-bar" role="progressbar" aria-valuenow="70"
         aria-valuemin="0" aria-valuemax="100" style="width:0">
        <span id="progress-text"></span>
    </div>
</div>

需要注意hub class名在js中是小写开头的，不然找不到


SignalR class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Web;
using Microsoft.AspNet.SignalR;


namespace SignalRStudyFromNoam.SignalR
{
    public class AMockThreadHub : Hub
    {
        public void DoSomeBackendJob()
        {
            Task.Run(() =>
            {
                double state = 1;
                while (state < 100)
                {
                    state += new Random().Next(5) ;
                    if (state > 100) state = 100;


                    Thread.Sleep(700);
                    
                    var context = GlobalHost.ConnectionManager.GetHubContext<AMockThreadHub>();
                    context.Clients.All.updateProgress(state);
                }
            });
        }
    }
}

Startup.cs

app.MapSignalR();

Controller

 public ActionResult Index()
        {
            new AMockThreadHub().DoSomeBackendJob();


            return View();
        }