无法执行命令

Question

我为我的不和谐机器人编写了一个简单的模块。机器人：_client = new DiscordSocketClient();_commandService = new CommandService();_serviceProvider = new ServiceCollection()     .AddSingleton(_client)     .AddSingleton(_commandService)     .BuildServiceProvider();模块：public class MyModule: ModuleBase<ICommandContext>{    private readonly MyService _service;    public MyModule(MyService service)    {        _service = service;    }    [Command("DoStuff", RunMode = RunMode.Async)]    public async Task DoStuffCmd()    {        await _service.DoStuff(Context.Guild, (Context.User as IVoiceState).VoiceChannel);    }}模块添加如下：await _commandService.AddModulesAsync(Assembly.GetEntryAssembly());添加模块显式将导致该模块已经添加的异常，所以我假设它有效。我像这样处理命令。// Create a number to track where the prefix ends and the command beginsint argPos = 0;// Determine if the message is a command, based on if it starts with '!' or a mention prefixif (!(message.HasCharPrefix('!', ref argPos) || message.HasMentionPrefix(_client.CurrentUser, ref argPos))) return;// Create a Command Contextvar context = new CommandContext(_client, message);// Execute the command. (result does not indicate a return value, // rather an object stating if the command executed successfully)var result = await _commandService.ExecuteAsync(context, argPos, _serviceProvider);该result变量总是返回Success，但DoStuffCmd在方法MyModule不会被调用。我在这里缺少什么？

Answer 1

你似乎没有注入MyService到你的ServiceCollection。

如果不注入服务，则永远无法创建模块，因为您将其定义为依赖项

private readonly MyService _service;

public MyModule(MyService service)

{

    _service = service;

}

要解决此问题，您可以将您MyService的添加到ServiceCollection.

为此，最好创建一个IMyService（接口）并将其添加到您的注射中

_serviceProvider = new ServiceCollection()

 .AddSingleton(_client)

 .AddSingleton(_commandService)

 .AddSingleton<IMyService, MyService>()

 .BuildServiceProvider();