使用OpenPop.dll errors c#读取gmail

Question

我正在尝试使用c#中的gmail使用OpenPop.dll读取电子邮件正文。我已经尝试过gmail，但是我无法让它工作，所以我尝试了这个。不管怎样，这是我的代码和错误。

            using (Pop3Client client = new Pop3Client())
            {
                client.Connect("pop.gmail.com", 995, true);
                client.Authenticate("signalxxxxxx@gmail.com", "xxxxxxxx", AuthenticationMethod.UsernameAndPassword);
                int messageCount = client.GetMessageCount();
                List<OpenPop.Mime.Message> allMessages = new List<OpenPop.Mime.Message>(messageCount);
                for (int d = messageCount; d > 0; d--)
                {
                    allMessages.Add(client.GetMessage(i));
                }

allMessages.Add部件上的错误。(运行时)

An unhandled exception of type 'OpenPop.Pop3.Exceptions.InvalidUseException' occurred in OpenPop.dll

Additional information: The messageNumber argument cannot have a value of zero or less. Valid messageNumber is in the range [1, messageCount]

Answer 1

您可能是在另一个for循环中使用这段代码，并且错误地选择了索引变量。GetMessage方法中的参数应该是d，而不是i。它应该是这样的：

using (Pop3Client client = new Pop3Client())
{
     client.Connect("pop.gmail.com", 995, true);
     client.Authenticate("signalxxxxxx@gmail.com", "xxxxxxxx", AuthenticationMethod.UsernameAndPassword);
     int messageCount = client.GetMessageCount();
     List<OpenPop.Mime.Message> allMessages = new List<OpenPop.Mime.Message>(messageCount);
     for (int d = messageCount; d > 0; d--)
     {
          allMessages.Add(client.GetMessage(d));
     }
}