如何使用TLSharp从电报通道获取通道消息？

Question

如何使用TLSharp从电报通道获取通道消息？

以下链接并没有帮助我：

• How can I get messages from a Telegram channel with the Telegram API

• How to obtain all messages from my channel in telegram?

Answer 1

要获得渠道的消息，你只需要为接收频道更新。

截至TL-模式-52，你可以要求：

channels.getDialogs#a9d3d249 offset:int limit:int = messages.Dialogs; 

但是这已经在TL-模式-53被丢弃。

我猜你可以试试其他channel.*功能之一，

我还没有TL-架构53

什么版本的TL-架构是使用TLSharp还没试过？

你可以简单地实现相关功能，如果他们还没有在你的TLSharp版本中实现

Answer 2

您可以使用此代码

 public async Task GatherChannelHistory(string channelName, int offset = 0, int maxId = -1, int limit = 50) 
    { 
     _resultMessages.Clear(); 
     await _client.ConnectAsync(); 

     var dialogs = (TLDialogs)await _client.GetUserDialogsAsync(); 
     var chat = dialogs.chats.lists 
      .OfType<TLChannel>() 
      .FirstOrDefault(c => c.title == channelName); 

     if (chat.access_hash != null) 
     { 
      var tlAbsMessages = 
       await _client.GetHistoryAsync(
        new TLInputPeerChannel {channel_id = chat.id, access_hash = chat.access_hash.Value}, offset, 
        maxId, limit); 

      var tlChannelMessages = (TLChannelMessages) tlAbsMessages; 

      for (var index = 0; index < tlChannelMessages.messages.lists.Count-1; index++) 
      { 
       var tlAbsMessage = tlChannelMessages.messages.lists[index]; 
       var message = (TLMessage) tlAbsMessage; 
       if (message.media == null) 
       { 
        _resultMessages.Add(new ChannelMessage() 
        { 
         Id = message.id, 
         ChannelId = chat.id, 
         Content = message.message, 
         Type = EnChannelMessage.Message, 
         Views = message.views, 
        }); 
       } 
       else 
       { 

        switch (message.media.GetType().ToString()) 
        { 
         case "TeleSharp.TL.TLMessageMediaPhoto": 
          var tLMessageMediaPhoto = (TLMessageMediaPhoto)message.media; 

          _resultMessages.Add(new ChannelMessage() 
          { 
           Id = message.id, 
           ChannelId = chat.id, 
           Content = tLMessageMediaPhoto.caption, 
           Type = EnChannelMessage.MediaPhoto, 
           Views = message.views ?? 0, 
          }); 
          break; 
         case "TeleSharp.TL.TLMessageMediaDocument": 
          var tLMessageMediaDocument = (TLMessageMediaDocument)message.media; 

          _resultMessages.Add(new ChannelMessage() 
          { 
           Id = message.id, 
           ChannelId = chat.id, 
           Content = tLMessageMediaDocument.caption, 
           Type = EnChannelMessage.MediaDocument, 
           Views = message.views ?? 0, 
          }); 
          break; 
         case "TeleSharp.TL.TLMessageMediaWebPage": 
          var tLMessageMediaWebPage = (TLMessageMediaWebPage)message.media; 
          string url = string.Empty; 
          if (tLMessageMediaWebPage.webpage.GetType().ToString() != "TeleSharp.TL.TLWebPageEmpty") 
          { 
           var webPage = (TLWebPage) tLMessageMediaWebPage.webpage; 
           url = webPage.url; 
          } 

          _resultMessages.Add(new ChannelMessage 
          { 
           Id = message.id, 
           ChannelId = chat.id, 
           Content = message.message + @" : " + url, 
           Type = EnChannelMessage.WebPage, 
           Views = message.views ?? 0, 
          }); 
          break; 
        } 
       } 
      } 
     } 
    }