在Blazor Server应用程序中使用SignalR Core代替socket.io
Blazor Server应用程序可以使用SignalR Core来实现与服务器的实时通信,而无需使用第三方JavaScript库。以下是在Blazor Server应用程序中使用SignalR Core的示例代码:
1.在Startup.cs文件中,将SignalR服务配置为使用JSON作为默认协议。
public void ConfigureServices(IServiceCollection services)
{
//Configure SignalR
services.AddSignalR().AddJsonProtocol(options => {
options.PayloadSerializerOptions.PropertyNamingPolicy = null;
});
}
2.添加SignalR集线器类并实现所需的方法,例如:
public class ChatHub : Hub
{
public async Task SendMessage(string user, string message)
{
await Clients.All.SendAsync("ReceiveMessage", user, message);
}
}
3.将SignalR集线器路由到Blazor Server应用程序,例如:
app.UseEndpoints(endpoints =>
{
endpoints.MapHub("/chatHub");
endpoints.MapFallbackToFile("index.html");
});
4.在Blazor组件中,使用注入ISignalRHubContext服务来初始化SignalR连接,并向服务器发送和接收消息。
@page "/chat"
@using Microsoft.AspNetCore.SignalR.Client
@inject IJSRuntime jsRuntime
@inject NavigationManager navigationManager
@inject ISignalRHubContext hubContext
Blazor Chat
@foreach (var msg in messages)
{
- @msg
}
@code {
private string user;
private string message;
private List messages = new List();
private HubConnection hubConnection;
protected override async Task OnInitializedAsync()
{
hubConnection = hubContext.CreateConnection();
await hubConnection.StartAsync();
hubConnection.On("ReceiveMessage", (user, message) =>
{
messages.Add($"{user}: {message}");
StateHasChanged();
});
}
private async Task SendMessage()
{
await hubConnection.SendAsync("SendMessage", user, message);
message = "";
}
}
这种方法可以轻松地使用SignalR Core来替换socket.io