Discord.NET用户玩同一个游戏

Question

我正在尝试创建一个命令，返回当前正在玩指定游戏的公会成员数。

示例（！是我的前缀） :.打英雄联盟。

如果有5名成员在玩英雄联盟，请输出：

v.Game.toString()

我设置了以下内容，从调试我能够接收[Command("playing")] public async Task playingGame(params string[] s) { string gameName = ""; int count = 0; for (int i = 0; i < s.Length; i++) { gameName += s[i] + " "; } await Context.Channel.SendMessageAsync("Looking for: " + gameName); var u = Context.Guild.Users; foreach (var v in u) { await Context.Channel.SendMessageAsync("v = " + v.ToString()); try { await Context.Channel.SendMessageAsync(v.Game.ToString()); if (v.Game.ToString().ToLower().Equals(gameName.ToLower())) { count++; await Context.Channel.SendMessageAsync("Found match, count = " + count); } } catch (Exception x) { await Context.Channel.SendMessageAsync("Exception throw caught"); } } if (count > 1) { await Context.Channel.SendMessageAsync("There are " + count + " users currently playing " + gameName + "."); } else if (count == 1) { await Context.Channel.SendMessageAsync("There is " + count + " user currently playing " + gameName + "."); } else if (count == 0) { await Context.Channel.SendMessageAsync("No one is currently playing " + gameName + "."); } } 返回正确的字符串但由于某种原因if语句不会触发。它还会捕获一个异常，当成员不玩游戏时会抛出异常（我认为它是空的？），是否有解决方法？为什么这不计算有多少成员正在玩某种游戏？

System.ArgumentException: Argument cannot be blank
Parameter name: Content
at Discord.Preconditions.NotNullOrEmpty(String obj, String name, String msg)
at Discord.API.DiscordRestApiClient.<CreateMessageAsync>d__77.MoveNext()
--- End of stack trace from previous location where exception was thrown ---

这是一个例外：

  public TestDatabase (Context context) {
    super(context,DATABASE_NAME, null, DATABASE_VERSION);
}

 @Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL(<YOUR QUERIES TO EXECUTE WHEN APPLICATION IS FIRST INSTALLED>);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL(<YOUR QUERY WHEN DB VERSION CHANGES>);

}

if if语句应该触发的图片（因隐私原因而被阻止的用户名）：

Answer 1

游戏参数无需params string[] s。只需使用Remainder属性。

我还简化了这段代码很多：

    [Command("playing")]
    public async Task GetUsersPlaying([Remainder]string game)
    {
        await Context.Message.DeleteAsync();

        var users = Context.Guild.Users.Where(x => x.Game.ToString() == game).Distinct().Select(x => x.Username);
        var count = users.Count();

        var SeparatedList = string.Join(", ", users);

        string message;
        if (count > 1)
            message = $"There are {count} users playing {game}. [{SeparatedList}]";
        else if (count == 1)
           message = $"There is {count} user playing {game}. [{SeparatedList}]";
        else
            message = $"There is no one playing {game}.";

        await  Context.Channel.SendMessageAsync(message);
    }