public bool CheckUser(string server, string user, string pwd)
{
MyDelegate myDelegate = new MyDelegate(CheckUser);
MailInfo checkEmailInfo = new MailInfo();
checkEmailInfo.server = server;
checkEmailInfo.user = user;
checkEmailInfo.pwd = pwd;
IAsyncResult result = myDelegate.BeginInvoke(checkEmailInfo, null, null);
Thread.Sleep(1000);//主线程1秒后检查异步线程是否运行完毕
if (result.IsCompleted)
{
return(myDelegate.EndInvoke(result));
} //如果错误的邮箱和密码，函数将会运行很慢
else
{
return(false);
}
}
private bool CheckUser(object checkEmailInfo)
{
MailInfo checkInfo = (MailInfo)checkEmailInfo;
TcpClient sender = new TcpClient(checkInfo.server, 110);//pop协议使用TCP的110端口
Byte[] outbytes;
NetworkStream ns;
StreamReader sr;
string input;
string readuser = string.Empty;
string readpwd = string.Empty;
try
{
ns = sender.GetStream();
sr = new StreamReader(ns);
sr.ReadLine();
//检查用户名和密码
input = "user " + checkInfo.user + "\r\n";
outbytes = Encoding.ASCII.GetBytes(input.ToCharArray());
ns.Write(outbytes, 0, outbytes.Length);
readuser = sr.ReadLine();
input = "pass " + checkInfo.pwd + "\r\n";
outbytes = Encoding.ASCII.GetBytes(input.ToCharArray());
ns.Write(outbytes, 0, outbytes.Length);
readpwd = sr.ReadLine();
if (readuser.Substring(0, 3) == "+OK" && readpwd.Substring(0, 3) == "+OK")
{
return(true);
}
else
{
return(false);
}
}
catch
{
return(false);
}
}