SignalR:无法访问默认的集线器方法 [英] SignalR : Cannot access default hub methods

问题描述

在我的Angular项目中，在我的项目中使用TypedHub接口(称为IDemoHubTypedClient)，如下所示:

In my Angular project use TypedHub interface (called IDemoHubTypedClient) in my project as shown below:

IDemoHubTypedClient:

IDemoHubTypedClient:

public interface IDemoHubTypedClient
{
    Task BroadcastData(object data);

    Task SendMessageToClient(string title, string name, string message);
}

但是，由于我继承自Hub<IDemoHubTypedClient>而不是Hub，所以无法访问默认的集线器方法(例如SendAsync())，如下所示，只能访问IDemoHubTypedClient中的方法，即BroadcastData()和.当我需要使用此结构来使用DI和TypedHub时，如何解决此问题?是否应该在IDemoHubTypedClient中添加所有集线器方法(SendAsync()等)?如您所知，这些方法只有在客户端使用的密封(我称BroadcastData()方法，而该方法实际上在客户端).有什么主意吗?

However, as I inherited from Hub<IDemoHubTypedClient> instead of Hub, I cannot access to the default hub methods i.e. SendAsync() as shown below and only access the methods in the IDemoHubTypedClient i.e. BroadcastData() and SendMessageToClient(). As I need to use this structure for using DI and TypedHub, how can I fix this problem? Should I add all the hub methods (SendAsync() etc.) in my IDemoHubTypedClient? As you know there is only seals of these methods as they are on client side (I call BroadcastData() method and this method is actually on client side). Any idea?

DemoHub:

DemoHub:

public class DemoHub : Hub<IDemoHubTypedClient>
{
    public async Task SendMessageToAll(string user, string message)
    {
        await Clients.All.SendAsync(user, message);
    }
}

推荐答案

我想，如果要使用强类型集线器，则必须在接口上定义所有客户端方法. AFAIK无法在强类型集线器和普通集线器之间混合匹配".如果您有这样的客户:

I think you must define all your client methods on the interface if you want to use strongly typed hub. AFAIK there is no way to "mix-and-match" between a strongly typed hub and a normal hub. If you have a client like this:

this.connection.on('receiveMessage', (message: string) => {
    // Do things
});

this.connection.on('receiveData', (data: MyData, message: string) => {
    // Do things
});

然后，如果要使用强类型集线器，则必须使用使用相同名称和签名(方法名不区分大小写)的方法定义强类型集线器接口:

Then if you want to use strongly typed hub, you must define your strongly typed hub interface with methods using the same names and signatures (method names are case-insensitive):

public interface IDemoClient
{
    Task ReceiveMessage(string message);
    Task ReceiveData(MyData data, string message);
}

优点是您可以编写await Clients.All.ReceiveMessage("Hello from server!")而不是await Clients.All.SendAsync("ReceiveMessage", "Hello from server!").整个要点是，您不必对客户端方法名称进行硬编码，并且可以对方法参数进行其他静态类型检查.

The advantage is that you can write await Clients.All.ReceiveMessage("Hello from server!") instead of await Clients.All.SendAsync("ReceiveMessage", "Hello from server!"). The whole point is that you don't have to hardcode the client method name and you get additional static type checking for the method parameters.

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