c#代码片段

获取当前目录
            var a = AppDomain.CurrentDomain.BaseDirectory;

            var c = Directory.GetCurrentDirectory();
            Directory.SetCurrentDirectory("c:/");
            var d = Directory.GetCurrentDirectory();

.net mvc ajaxhelper
刷整页的问题，要引入jquery.unobtrusive-ajax.min.js

socket

Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
client.BeginConnect(ipAddress, port, new AsyncCallback(ConnectCallback), so);


private static void ConnectCallback(IAsyncResult ar)
        {

                Socket client = (Socket)ar.AsyncState;

                byte[] fileBuffer = so.fileBuffer;

                // Complete the connection.
                so.workSocket.EndConnect(ar);


                // Signal that the connection has been made.
                connectDone.Set();

                so.workSocket.BeginSend(fileBuffer, 0, fileBuffer.Length, SocketFlags.None, new AsyncCallback(SendCallback), so);

        }

private static void SendCallback(IAsyncResult ar)
        {
            SmsDao sd = new SmsDao();
            StateObject so = (StateObject)ar.AsyncState;
            try
            {
                // Retrieve the socket from the state object.

                // Complete sending the data to the remote device.
                int bytesSent = so.workSocket.EndSend(ar);
                Console.WriteLine("Sent {0} bytes to server.", bytesSent);

                // Signal that all bytes have been sent.
                sendDone.Set();
                if (so.fileBuffer.Length == bytesSent)
                {
                    sd.updatePushStatus(so.orderID, "1", DateTime.Now.ToString("HHmmss.fff"));
                }
                else
                {
                    sd.updatePushStatus(so.orderID, "-1", "发送长度错误" + DateTime.Now.ToString("HHmmss.fff"));
                }

                so.workSocket.Shutdown(SocketShutdown.Both);
                so.workSocket.Close();
                //Receive(client);
            }
        }