我有两个项目。
First, WebApi
包含用于使用的集线器SignalR
:
public class NotificationsHub : Hub
{
public async Task GetUpdateForServer(string call)
{
await this.Clients.Caller.SendAsync("ReciveServerUpdate", call);
}
}
我将 Hub 设置为Startup.cs
:
public void ConfigureServices(IServiceCollection services)
{
// ofc there is other stuff here
services.AddHttpContextAccessor();
services.AddSignalR();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseSignalR(routes => routes.MapHub<NotificationsHub>("/Notifications"));
}
我相信我会在以下位置发出这样的通知TaskController.cs
:
[HttpPost]
public async Task<IActionResult> PostTask([FromBody] TaskManager.Models.Task task)
{
if (!this.ModelState.IsValid)
{
return this.BadRequest(this.ModelState);
}
this.taskService.Add(task);
//here, after POST i want to notify whole clients
await this.notificationsHub.Clients.All.SendAsync("NewTask", "New Task in database!");
return this.Ok(task);
}
问题从这里开始。
I have WPF
应用程序包含HubService
:
public class HubService
{
public static HubService Instance { get; } = new HubService();
public ObservableCollection<string> Notifications { get; set; }
public async void Initialized()
{
this.Notifications = new ObservableCollection<string>();
var queryStrings = new Dictionary<string, string>
{
{ "group", "allUpdates" }
};
var hubConnection = new HubConnection("https://localhost:44365/Notifications", queryStrings);
var hubProxy = hubConnection.CreateHubProxy("NotificationsHub");
hubProxy.On<string>("ReciveServerUpdate", call =>
{
//todo
});
await hubConnection.Start();
}
}
我在我的中初始化它MainViewModel
构造函数:
public MainWindowViewModel()
{
HubService.Instance.Initialized();
}
问题开始于await hubConnection.Start();
。从这一行,我得到一个错误:
“状态代码:404,原因短语:'未找到',版本:1.1,内容:System.Net.Http.StreamContent,标头:X-SourceFiles:=?UTF-8?B?QzpcVXNlcnNcQWRtaW5cc291cmNlXHJlcG9zXFRhc2tNYW5hZ2VyXFRhc2tNYW5hZ2VyLXdlYmFwaV xOb3RpZmljYXRpb25zXHNpZ25hbHJcbmVnb3RpYXRl?= 日期:2019 年 5 月 28 日,星期二16:25:13 GMT 服务器:Kestrel X 供电者:ASP.NET 内容长度:0
我的问题是,我做错了什么以及如何连接到我的集线器WebApi
项目?
EDIT
集线器似乎可以工作。我在浏览器中输入:https://localhost:44365/notifications
我收到消息:
需要连接 ID
EDIT2
WPF
项目是.NET Framework 4.7.2
and WebApi
is Core 2.1
.