Question

所以我的命令出了问题。它似乎没有显示任何问题，但当我去使用命令时，我从我的机器人那里得到了这个。

“错误：输入文本的参数太少。”

我不知道我是否应该使用IUserMessage或SocketMessage，我已经尝试过两者并且通常会得到同样的错误。

我不知道哪里出错了？我试图解决这个问题已经有一段时间了，我试图解决这个问题。任何帮助，将不胜感激。

    [Command("purge")]
    [Summary("deletes set amount of text")]
    [RequireUserPermission(GuildPermission.Administrator)]
    [RequireBotPermission(GuildPermission.Administrator)]
    public async Task PurgeChat(IUserMessage msg, int amount)
    {
        int messagesDeleted = 0;
        var purgeMessage = await msg.Channel.SendMessageAsync("_purging in progress, give me a minute.._");
        var lastMessageID = purgeMessage.Id;


        try
        {
            var stop = false;
            while (amount > messagesDeleted)
            {
                var messages = await msg.Channel.GetMessagesAsync(lastMessageID, Direction.Before, 15).OfType<IUserMessage>().ToList();
                foreach (IUserMessage message in messages)
                {
                    await message.DeleteAsync();
                    messagesToDelete++;
                    if (messagesDeleted >= amount || messages.Count == 0)
                    {
                        stop = true;
                        break;
                    }
                    lastMessageID = messages.Last().Id;
                }
                if (stop || messages.Count == 0)
                {
                    break;
                }
            }
        }
        catch (Exception ex)
        {
            if (ex.Message != "The server responded with error 404 (NotFound): \"Unknown Message\"")
            {
                await Context.Channel.SendMessageAsync("Something fucked up while trying to delete messages, you are going to have to manually Delete them for now. or try again");
            }
        }
        finally
        {
            await purgeMessage.ModifyAsync(x => x.Content = "_Purge Completed, this message will self destruct in 5 seconds_");
            await Task.Factory.StartNew(async () =>
             {
                 await Task.Delay(5000);
                 await purgeMessage.DeleteAsync();
             });
        }
    }

Answer 1

[Command("purge", RunMode = RunMode.Async)]
[Summary("Deletes the specified amount of messages.")]
[RequireUserPermission(GuildPermission.Administrator)]
[RequireBotPermission(ChannelPermission.ManageMessages)]
public async Task PurgeChat(uint amount)
{
    var messages = await this.Context.Channel.GetMessagesAsync((int)amount + 1).Flatten();

    await this.Context.Channel.DeleteMessagesAsync(messages);
    const int delay = 5000;
    var m = await this.ReplyAsync($"Purge completed. _This message will be deleted in {delay / 1000} seconds._");
    await Task.Delay(delay);
    await m.DeleteAsync();
}

Answer 2

以下是未来读者受益的3个要点：

1）在循环中单独删除许多消息将导致非常不愉快的速率限制异常。

var messages = await msg.Channel.GetMessagesAsync();
foreach (IUserMessage message in messages)
{
     await message.DeleteAsync(); //rate limit exception if too many messages!!!
}

2） BULK删除：您希望使用BBell在其答案中提供的DeleteMessagesAsync（）方法来删除 BULK 消息。然而它最近搬进了ITextChannel。以下是如何使用它的示例：

var messages = await msg.Channel.GetMessagesAsync(100).FlattenAsync(); //defualt is 100
await (Context.Channel as SocketTextChannel).DeleteMessagesAsync(messages);

这是另一个在没有强制转换的情况下访问ITextChannel的示例。请注意区别？：

Context.Guild.GetTextChannel(id);  //yes, because it implements ITextChannel!
Context.Guild.GetChannel(id);   //no, cant delete messages.

这让我骗了一段时间。

3）Discord不允许您使用DeleteMessagesAsync（）删除超过2周的邮件。您必须使用message.DeleteAsync（）手动执行每个操作。

我真诚地希望它有所帮助！

Answer 3

我的代码，用于在不阻止线程的情况下删除最大消息。

好吧，您只需要获取一组消息并开始删除每个IMessage元素的消息即可。

[Command("clean")]
    public async Task Clean(int max)
    {

        var messages = Context.Channel.GetMessagesAsync(max).Flatten();
        foreach (var h in  await messages.ToArrayAsync())
        {
            await this.Context.Channel.DeleteMessageAsync(h);
        }
    }

Answer 4

我看到了问题。您接受了一个名为 msg 的IUserMessage作为参数，而不是稍后再声明它。这要求命令有一个额外的输入，对于清除命令来说真的没有意义。这就是我所拥有的：

    [Command("purge")]
    [Name("purge <amount>")]
    [Summary("Deletes a specified amount of messages")]
    [RequireBotPermission(GuildPermission.ManageMessages)]
    [RequireUserPermission(GuildPermission.ManageMessages)]
    public async Task DelMesAsync(int delnum)
    {
        var items = await Context.Channel.GetMessagesAsync(delnum + 1).Flatten();
        await Context.Channel.DeleteMessagesAsync(items);
    }

我取出了所有的消息部分，但这应该可以解决您的参数问题。

Discord.net 1.0 - 如何删除邮件？

4 个答案: