微软休息尝试创建答复时发生ValidationException

如果您正在使用 活动CreateMessageActivity() 然后,您需要指定用户帐户(ToId,ToName)、bot帐户(FromId,FromName)和会话(conversationid,channelId)的详细信息。

例如:

var userAccount = new ChannelAccount(toId,toName);
var botAccount = new ChannelAccount(fromId, fromName);
var connector = new ConnectorClient(new Uri(serviceUrl));

IMessageActivity message = Activity.CreateMessageActivity();
if (!string.IsNullOrEmpty(conversationId) && !string.IsNullOrEmpty(channelId))
{
    message.ChannelId = channelId;
}
else
{
    conversationId = (await connector.Conversations.CreateDirectConversationAsync( botAccount, userAccount)).Id;
}
message.From = botAccount;
message.Recipient = userAccount;
message.Conversation = new ConversationAccount(id: conversationId);
message.Text = "The text you want to send";
//You can add your attachment here
message.Locale = "en-Us";
await connector.Conversations.SendToConversationAsync((Activity)message);

查看您的代码,您似乎可以访问 上下文 因为您正在使用上下文发布消息。PostAsync,因此更简单的方法是使用上下文发送消息,因为上下文已经包含用户、机器人和对话的详细信息。

您可以通过使用上下文来实现这一点。MakeMessage()

例如:

IMessageActivity reply = context.MakeMessage();

var images = doc.DocumentNode.SelectNodes("//img[@src]").ToList();
var src = images[10].GetAttributeValue("src", null);
Attachment att = new Attachment();
att.ContentType = "image/png";
att.ContentUrl = src;

reply.Attachments.Add(att);
await context.PostAsync(reply);
context.Wait(MessageReceived);