C# Socket 客户端示例-优快云博客

本文介绍了一个使用 C# 编写的简单 Socket 客户端程序示例，该程序能够连接到指定的服务器地址及端口，并实现基本的数据发送与接收功能。此外，还展示了如何利用 P/Invoke 调用 Windows API 来控制控制台窗口的可见性。

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace Client
{
    class Program
    {
        [DllImport("user32.dll")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        [DllImport("user32.dll")]
        static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
        [STAThread()]
        static void Main(string[] args)
        {
            try
            {
                int port = 21;
                string host = "127.0.0.1";
                /**/
                ///创建终结点EndPoint
                IPAddress ip = IPAddress.Parse(host);
                //IPAddress ipp = new IPAddress("127.0.0.1");
                IPEndPoint ipe = new IPEndPoint(ip, port);//把ip和端口转化为IPEndpoint实例
                /**/
                ///创建socket并连接到服务器
                Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建Socket
                Console.WriteLine("Conneting…");
                c.Connect(ipe);//连接到服务器
                /**/
                ///向服务器发送信息
                string sendStr = "100";
                byte[] bs = Encoding.ASCII.GetBytes(sendStr);//把字符串编码为字节
                Console.WriteLine("Send Message");
                c.Send(bs, bs.Length, 0);//发送信息
                /**/
                ///接受从服务器返回的信息
                string recvStr = "";
                byte[] recvBytes = new byte[1024];
                int bytes;
                bytes = c.Receive(recvBytes, recvBytes.Length, 0);//从服务器端接受返回信息
                recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);
                Console.WriteLine("client get message:{0}", recvStr);//显示服务器返回信息
                /**/
                ///一定记着用完socket后要关闭
                c.Close();
                Console.Title = "MyConsoleApp";
                // hide the console window
                setConsoleWindowVisibility(false, Console.Title);
                // open your form
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new MainForm());
            }
            catch (ArgumentNullException e)
            {
                Console.WriteLine("argumentNullException: {0}", e);
            }
            catch (SocketException e)
            {
                Console.WriteLine("SocketException:{0}", e);
            }
            Console.WriteLine("Press Enter to Exit");
            // else don't do anything as the console window opens by default
        }
        public static void setConsoleWindowVisibility(bool visible, string title)
        {
            // below is Brandon's code
            //Sometimes System.Windows.Forms.Application.ExecutablePath works for the caption depending on the system you are running under.
            IntPtr hWnd = FindWindow(null, title);
            if (hWnd != IntPtr.Zero)
            {
                if (!visible)
                    //Hide the window
                    ShowWindow(hWnd, 0); // 0 = SW_HIDE
                else
                    //Show window again
                    ShowWindow(hWnd, 1); //1 = SW_SHOWNORMA
            }
        }
    }
}

转载于:https://www.cnblogs.com/ori8/archive/2009/05/22/1486928.html