SignalR Progress

Server

 public class ServerHub : Hub
    {
       public async Task<string> ALongTimeTask()
        {
            var p = new Progress<int>();
            p.ProgressChanged += (a, count) =>
            {
                Clients.Caller.progressChanged(count);
            };
            var ret = await DoLongTimeTask(p);
            return ret;
        }

        private async Task<string> DoLongTimeTask(IProgress<int> p)
        {
            for (int i = 0; i < 100; i++)
            {
                p.Report(i);
                await Task.Delay(100);
            }
            return "finish";
        }
    }

c#调用：

        var hubConnection = new HubConnection("http://abc.com/signalr");
        client = hubConnection.CreateHubProxy("ServerHub");
        client.On("progressChanged", (count) =>
        {
　　　　　　//display current count;
        });
  　　　 var t = await client.Invoke<string>("ALongTimeTask");
        MessageBox.Show(t);

javascript调用

       var chat = $.connection.serverHub;
        chat.client.progressChanged = function (count) {
                // display count
          };
        chat.server.aLongTimeTask().done(function (result) {
                // display result
         });