服务器是干啥子用滴？监听客户端，响应客户端用滴！
虽然是世界上最简陋的服务器，但是也有几个注意点：
1.因为要一个死循环监听客户端响应，也就是说无法和用户进行交互了，所以防止前台假死就要为监听新起一个线程；
2.要把新起的线程td.IsBackground = true;设置为后台线程，这样的话线程才会随着应用程序的关闭而关闭，不然的话关了窗体，它还在运行；
3.跨线程问题，在新的线程里改变UI会报跨线程改变UI的错误，所以要用Invoke;
4.在监听的死循环中加入 Thread.Sleep(1);这样可以提高应用程序性能，不要担心当服务的线程正在Sleep的时候来了个请求服务器会收不到，其实是收得到的。
加入Thread.Sleep(1)的CPU如图：
不加Thread.Sleep(1)的CPU如图：
所以一定要加！
所以服务器端代码如下：
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9
10 using System.Threading;
11 using System.Net;
12 using System.Net.Sockets;
13
14
15 namespace Server
16 {
17 public partial class Form1 : Form
18 {
19 public Form1()
20 {
21 InitializeComponent();
22 }
23
24 private void button1_Click(object sender, EventArgs e)
25 {
26 Thread td = new Thread(Listen);
27 td.IsBackground = true;
28 td.Start();
29 this.button1.Enabled = false;
30 MessageBox.Show("服务器成功开启");
31
32 }
33 public delegate void ChangeRickBoxHandler(RichTextBox rtb,string str);
34 public void ChangeRichTextBox(RichTextBox rtb,string str)
35 {
36 rtb.AppendText(str);
37 }
38 private void Listen()
39 {
40 IPAddress ip = Dns.GetHostAddresses(Dns.GetHostName())[0];
41 int port = Int32.Parse(this.textBox1.Text.Trim());
42 TcpListener tl = new TcpListener(ip, port);
43 tl.Start();
44 while(true)
45 {
46 if (tl.Pending())
47 {
48 Socket newSocket = tl.AcceptSocket();
49 byte[] buff = new byte[9];
50 int length= newSocket.Receive(buff);
51 string command = Encoding.Default.GetString(buff);
52 if(command == "conServer")
53 {
54 Invoke(new ChangeRickBoxHandler(ChangeRichTextBox),this.richTextBox1,"有客户端连接了我");
55 }
56 }
57 Thread.Sleep(1);
58 }
59 }
60 }
61 }
62
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9
10 using System.Threading;
11 using System.Net;
12 using System.Net.Sockets;
13
14
15 namespace Server
16 {
17 public partial class Form1 : Form
18 {
19 public Form1()
20 {
21 InitializeComponent();
22 }
23
24 private void button1_Click(object sender, EventArgs e)
25 {
26 Thread td = new Thread(Listen);
27 td.IsBackground = true;
28 td.Start();
29 this.button1.Enabled = false;
30 MessageBox.Show("服务器成功开启");
31
32 }
33 public delegate void ChangeRickBoxHandler(RichTextBox rtb,string str);
34 public void ChangeRichTextBox(RichTextBox rtb,string str)
35 {
36 rtb.AppendText(str);
37 }
38 private void Listen()
39 {
40 IPAddress ip = Dns.GetHostAddresses(Dns.GetHostName())[0];
41 int port = Int32.Parse(this.textBox1.Text.Trim());
42 TcpListener tl = new TcpListener(ip, port);
43 tl.Start();
44 while(true)
45 {
46 if (tl.Pending())
47 {
48 Socket newSocket = tl.AcceptSocket();
49 byte[] buff = new byte[9];
50 int length= newSocket.Receive(buff);
51 string command = Encoding.Default.GetString(buff);
52 if(command == "conServer")
53 {
54 Invoke(new ChangeRickBoxHandler(ChangeRichTextBox),this.richTextBox1,"有客户端连接了我");
55 }
56 }
57 Thread.Sleep(1);
58 }
59 }
60 }
61 }
62
客户端代码：
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9
10 using System.Net;
11 using System.Net.Sockets;
12 using System.Threading;
13
14 namespace Client
15 {
16 public partial class Form1 : Form
17 {
18 public Form1()
19 {
20 InitializeComponent();
21 }
22
23 private void button1_Click(object sender, EventArgs e)
24 {
25 TcpClient tcpClient = new TcpClient();
26 tcpClient.Connect( Dns.GetHostAddresses(Dns.GetHostName())[0], Convert.ToInt32(this.textBox1.Text.Trim().ToString()));
27 NetworkStream nwStream = tcpClient.GetStream();
28 string cmd = "conServer" ;
29 Byte[] bytes = Encoding.Default.GetBytes(cmd.ToCharArray());
30 nwStream.Write(bytes, 0, bytes.Length);
31 }
32 }
33 }
34
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9
10 using System.Net;
11 using System.Net.Sockets;
12 using System.Threading;
13
14 namespace Client
15 {
16 public partial class Form1 : Form
17 {
18 public Form1()
19 {
20 InitializeComponent();
21 }
22
23 private void button1_Click(object sender, EventArgs e)
24 {
25 TcpClient tcpClient = new TcpClient();
26 tcpClient.Connect( Dns.GetHostAddresses(Dns.GetHostName())[0], Convert.ToInt32(this.textBox1.Text.Trim().ToString()));
27 NetworkStream nwStream = tcpClient.GetStream();
28 string cmd = "conServer" ;
29 Byte[] bytes = Encoding.Default.GetBytes(cmd.ToCharArray());
30 nwStream.Write(bytes, 0, bytes.Length);
31 }
32 }
33 }
34
源码下载===>/Files/zhanglei644213943/世界上最简陋的服务器.rar