Csharp 为什么SignalR在每个Blazor服务器应用程序启动时最多启动8个服务器

当我启动Blazor服务器应用程序时，我可以在SignalR服务中看到8台服务器已连接.我不明白为什么. 我的目标是MyRazorPage能够在不创建太多(不必要的？！)服务器的情况下发送和接收(从它自己或某个Azure函数)SignalR消息.

下面是我的代码，下面是我正在使用的DI服务注册:

100

MyRazorPage.razor个

@inject IHubConnectionFactory HubConnectionFactory // see HubConnectionFactory.cs below

MyRazorPage.razor.cs个

public sealed partial class MyRazorPage
{
    private HubConnection _hubConnection;
    
    public async ValueTask DisposeAsync()
    {
        if (_hubConnection is not null)
        {
            _hubConnection.Remove("MyMethodName");
            await _hubConnection.DisposeAsync();
        }
    }
    
    private async Task HandleHubMessageReceived(ResultDto result)
    {
        // handle received result
    }
    
    private Task SendMessage()
    {
        // ... 
        await _hubConnection.SendAsync("MethodName", new ResultDto(Guid.Parse(CustomerId), ResultEnum.Success));        
    }
    
    protected override async Task OnInitializedAsync()
    {  
        _hubConnection = HubConnectionFactory.CreateHubConnection();
        await _hubConnection.StartAsync(CancellationToken);
        _hubConnection.On<ResultDto>("MyMethodName", HandleHubMessageReceived);
    }   
}

100

Package references个

<PackageReference Include="Microsoft.Azure.SignalR" Version="1.24.0" />
<PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="8.0.1" />

appsettings.json个

"Azure": {
   "SignalR": {
     "Enabled": "true",
     "ConnectionString": "Endpoint=URL;AccessKey=KEY;Version=1.0;"
   },
 "SIGNALR_REFRESH_BILLING_PAGE_URI": "https://localhost:44362/MyHub",

Startup.cs个

public void ConfigureServices(IServiceCollection services)
{
    services.AddSignalR();
    services.AddSignalRHubConnection(config =>{
               config.ConnectionString = Configuration["SIGNALR_REFRESH_BILLING_PAGE_URI"] ?? 
               string.Empty;
               });
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseRequestLocalization(app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>().Value);

    if (!env.IsProduction())
    {
        app.UseDeveloperExceptionPage();
        app.UseMigrationsEndPoint();
    }
    else
    {
        app.UseExceptionHandler("/Error");
        // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
        app.UseHsts();
    }
    
    app.UseHttpsRedirection();
    app.UseStaticFiles();

    app.UseRouting();

    app.UseAuthentication();
    app.UseAuthorization();
    
    app.UseCookiePolicy();
    
    app.UseEndpoints(endpoints =>
                     {
                         endpoints.MapControllers();
                         endpoints.MapBlazorHub();
                         endpoints.MapRazorPages();
                         endpoints.MapFallbackToPage("/_Host");
                         endpoints.MapHub<MyHub>($"/{MyHub.HubName}");
                     });
}

HubConnectionFactory.cs个

public class HubConnectionFactory : IHubConnectionFactory
{
    private readonly SignalREndpointConfiguration _configuration;
    
    public HubConnectionFactory(IOptions<SignalREndpointConfiguration> configuration) => _configuration = configuration.Value;
    
    public HubConnection CreateHubConnection()
    {
        return new HubConnectionBuilder()
               .WithUrl(_configuration.ConnectionString)
               .Build();
    }  
}

MyHub.cs个

public class MyHub : Hub
{
    public const string HubName = "MyHub";

    public async Task SendMessage(ResultDto dto)
    {
        await Clients.All.SendAsync("MyMethodName", dto);
    }
}

我还try 了以下几种方法，但都没有成功: