Discord bot C# 不是 executing/reading 命令

Question

using Discord.Commands;
using Discord;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Remoting.Contexts;
using System.ServiceModel.Channels;

namespace Leaf
{
    class Leaf
    {
        [Command("!!Gpurge")]
        [RequireBotPermission(Discord.GuildPermission.ManageMessages)]
        [RequireUserPermission(Discord.GuildPermission.ManageMessages)]
        [Alias("Clear", "delete")]
        public async Task Purge(IUserMessage msg, int num = 100)
        {
        var purgeMessage = await msg.Channel.SendMessageAsync("!!Gpurge");
            var lastMessageID = purgeMessage.Id;
        if (num <= 100)
        {
            var messageToDelete = await msg.Channel.GetMessagesAsync(lastMessageID, Direction.Before, 15).OfType<IUserMessage>().ToList();
            await purgeMessage.DeleteAsync();
        }
    }

**我改为使用 !!G 作为前缀，清除是删除 1-100 范围内的许多消息的命令，但遗憾的是，它在不和谐的应用程序中既不读取也不响应

Answer 1

对于 Discord.NET，通过前缀检查消息是否为命令应该已经由异步处理程序处理。

如果您遵循 documentation/source-code 的示例，则可以在文件中的某处搜索 HandleCommandAsync 函数。

基本上从文档的示例来看，它看起来像这样：

private async Task HandleCommandAsync(SocketMessage arg)
    {
        // Bail out if it's a System Message.
        var msg = arg as SocketUserMessage;
        if (msg == null) return;

        // Create a number to track where the prefix ends and the command begins
        int pos = 0;
        // Replace the '!' with whatever character
        // you want to prefix your commands with.
        // Uncomment the second half if you also want
        // commands to be invoked by mentioning the bot instead.
        if (msg.HasCharPrefix('!', ref pos) /* || msg.HasMentionPrefix(_client.CurrentUser, ref pos) */)
        {
            // Create a Command Context.
            var context = new SocketCommandContext(_client, msg);

            // Execute the command. (result does not indicate a return value, 
            // rather an object stating if the command executed succesfully).
            var result = await _commands.ExecuteAsync(context, pos, _services);

            // Uncomment the following lines if you want the bot
            // to send a message if it failed (not advised for most situations).
            //if (!result.IsSuccess && result.Error != CommandError.UnknownCommand)
            //    await msg.Channel.SendMessageAsync(result.ErrorReason);
        }
    }

注意到 msg.HasCharPrefix('!', ref pos) 部分了吗？
基本上它会在尝试执行命令之前检查消息是否包含您想要的前缀。如果没有，则什么都不做。
（请注意 msg.HasStringPrefix() 也存在！）

Discord bot C# 不是 executing/reading 命令

Discord bot C# not executing/reading commands

c#

discord