直接用Socket TCP开发网络游戏(一)
本教程学习自Siki学院
1，控制台应用程序 ，创建服务器端 代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
namespace TCP服务端
{
class Program
{
static void Main(string[] args)
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
Socket clientSocket= serverSocket.Accept();//接收一个客户端的连接
///向客户端发送消息
string msg = "Hello client ！你好。。";
byte[] data= System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
/// 接收一条消息
///
byte[] dataBuffer = new byte[1024];
///数据没有填充满，前多少个有数据 ,count 指接收到了多少数据
///
int count = clientSocket.Receive(dataBuffer);
string msgReceive = System.Text.Encoding.UTF8.GetString(dataBuffer,0, count);
Console.WriteLine(msgReceive);
Console.ReadKey();
clientSocket.Close();//关闭客户端的连接
serverSocket.Close();//关闭自身的连接
}
}
}
2，创建客户端代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace TCP客户端
{
class Program
{
static void Main(string[] args)
{
//创建客户端
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//与服务器建立连接0
clientSocket.Connect(new IPEndPoint(IPAddress.Parse("192.168.1.7"), 88));
byte[] data = new byte[1024]; //建立
int count = clientSocket.Receive(data); //接受count个字节
string msg = System.Text.Encoding.UTF8.GetString(data, 0, count); //接收到的信息
Console.WriteLine(msg);
string s = Console.ReadLine();
byte[] buf= Encoding.UTF8.GetBytes(s);
clientSocket.Send(buf);
Console.ReadKey();
clientSocket.Close();
}
}
}目前的功能：
先启动服务器，服务器会像客户端发送一条消息，然后客户端再像服务器发送一条输入的消息，
3,现在改进后 变成异步加载
，服务器端和客户端 先启动服务器端，再启动客户端 ，
服务器端代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
namespace TCP服务端
{
class Program
{
static void Main(string[] args)
{
StartServerAsync();
Console.ReadKey();
}
///
/// 直接加载
///
void StartServerSvnc()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
///向客户端发送消息
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
/// 接收一条消息
///
byte[] dataBuffer = new byte[1024];
///数据没有填充满，前多少个有数据 ,count 指接收到了多少数据
///
int count = clientSocket.Receive(dataBuffer);
string msgReceive = System.Text.Encoding.UTF8.GetString(dataBuffer, 0, count);
Console.WriteLine(msgReceive);
Console.ReadKey();
clientSocket.Close();//关闭客户端的连接
serverSocket.Close();//关闭自身的连接
}
///
/// 异步加载
///
static void StartServerAsync()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
///向客户端发送消息
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
////异步加载
clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
}
static byte[] dataBuffor = new byte[1024];
static void ReceiveCallBack(IAsyncResult ar)
{
Socket clientSocket = ar.AsyncState as Socket;
int count= clientSocket.EndReceive(ar); //v结束挂起的异步读取。接收到的字节数。
string msg= Encoding.UTF8.GetString(dataBuffor, 0, count);
Console.WriteLine("客户端接受到的数据为： "+ msg);
clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
}
}
}
客户端代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace TCP客户端
{
class Program
{
static void Main(string[] args)
{
//创建客户端
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//与服务器建立连接0
clientSocket.Connect(new IPEndPoint(IPAddress.Parse("192.168.1.7"), 88));
byte[] data = new byte[1024]; //建立
int count = clientSocket.Receive(data); //接受count个字节
string msg = System.Text.Encoding.UTF8.GetString(data, 0, count); //接收到的信息
Console.WriteLine(msg);
while (true)
{
string s = Console.ReadLine();
byte[] buf = Encoding.UTF8.GetBytes(s);
clientSocket.Send(buf);
}
Console.ReadKey();
clientSocket.Close();
}
}
}
4 现在要实现 多个客户端的连接，
所以在客户端的连接也用到异步的方式，连接一个客户端就进行一次异步。现在客户端代码不要动，服务器端代码实现如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
namespace TCP服务端
{
class Program
{
static void Main(string[] args)
{
StartServerAsync();
Console.ReadKey();
}
///
/// 直接加载
///
void StartServerSvnc()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
///向客户端发送消息
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
/// 接收一条消息
///
byte[] dataBuffer = new byte[1024];
///数据没有填充满，前多少个有数据 ,count 指接收到了多少数据
///
int count = clientSocket.Receive(dataBuffer);
string msgReceive = System.Text.Encoding.UTF8.GetString(dataBuffer, 0, count);
Console.WriteLine(msgReceive);
Console.ReadKey();
clientSocket.Close();//关闭客户端的连接
serverSocket.Close();//关闭自身的连接
}
///
/// 异步加载
///
static void StartServerAsync()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
//Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
// ///向客户端发送消息
//要想多个客户端连接就要把 客户端的连接的接收也做成异步的
/* Socket clientSocket = */
serverSocket.BeginAccept(AsyncCallback, serverSocket);
}
////异步加载
static void AsyncCallback(IAsyncResult ar)
{
Socket serverSocket = ar.AsyncState as Socket; //把传进来的server进行转型，
Socket clientSocket = serverSocket.EndAccept(ar); //完成接收
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
serverSocket.BeginAccept(AsyncCallback, serverSocket); //再次调用 处理下一个客户端的连接
}
static byte[] dataBuffor = new byte[1024];
static void ReceiveCallBack(IAsyncResult ar)
{
Socket clientSocket = ar.AsyncState as Socket;
int count= clientSocket.EndReceive(ar); //v结束挂起的异步读取。接收到的字节数。
string msg= Encoding.UTF8.GetString(dataBuffor, 0, count);
Console.WriteLine("客户端接受到的数据为： "+ msg);
clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
}
}
}
5，在服务器处理客户端的连接正常关闭和非正常关闭，
现在所处的问题就是 如果多开启几个客户端 ，关闭客户端窗口后就会结束程序，出现异常 异常为非法关闭客户端 所以需要try cath捕获异常
出现异常后关闭改客户端。再 然后 在客户端输出‘c’ 为关闭客户端，这时候依然会出现问题 服务器端依然会接收到长度为0的字符串一直输出，这时候需要判断正常关闭客户端的操作 通过发送为0长度的字符串来判断。 服务器客户端的代码实现如下。
服务器：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
namespace TCP服务端
{
class Program
{
static void Main(string[] args)
{
StartServerAsync();
Console.ReadKey();
}
///
/// 直接加载
///
void StartServerSvnc()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
///向客户端发送消息
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
/// 接收一条消息
///
byte[] dataBuffer = new byte[1024];
///数据没有填充满，前多少个有数据 ,count 指接收到了多少数据
///
int count = clientSocket.Receive(dataBuffer);
string msgReceive = System.Text.Encoding.UTF8.GetString(dataBuffer, 0, count);
Console.WriteLine(msgReceive);
Console.ReadKey();
clientSocket.Close();//关闭客户端的连接
serverSocket.Close();//关闭自身的连接
}
///
/// 异步加载
///
static void StartServerAsync()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
//Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
// ///向客户端发送消息
//要想多个客户端连接就要把 客户端的连接的接收也做成异步的
/* Socket clientSocket = */
serverSocket.BeginAccept(AsyncCallback, serverSocket);
}
////异步加载
static void AsyncCallback(IAsyncResult ar)
{
//把传进来的server进行转型，
////如果不添加try catch 异常捕捉的话 如果强制关闭一个客户端的话，服务器程序就会终止
Socket serverSocket = ar.AsyncState as Socket;
Socket clientSocket = serverSocket.EndAccept(ar); //完成接收
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
serverSocket.BeginAccept(AsyncCallback, serverSocket); //再次调用 处理下一个客户端的连接
}
static byte[] dataBuffor = new byte[1024];
static void ReceiveCallBack(IAsyncResult ar)
{
Socket clientSocket = null;
try
{
clientSocket = ar.AsyncState as Socket;
int count = clientSocket.EndReceive(ar); //v结束挂起的异步读取。接收到的字节数。
if (count==0) //如果输入‘c’ 客户端正常关闭 服务器会一直接收到空数据， 通过判断接受到的长度 如果为0 是正常关闭 关闭客户端 return就好了
{
clientSocket.Close();return;
}
string msg = Encoding.UTF8.GetString(dataBuffor, 0, count);
Console.WriteLine("客户端接受到的数据为： " + msg);
clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
}
catch (Exception e)
{
Console.WriteLine(e);
if (clientSocket != null)
{
clientSocket.Close();
}
}
}
}
}
客户端：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace TCP客户端
{
class Program
{
static void Main(string[] args)
{
//创建客户端
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//与服务器建立连接0
clientSocket.Connect(new IPEndPoint(IPAddress.Parse("192.168.1.7"), 88));
byte[] data = new byte[1024]; //建立
int count = clientSocket.Receive(data); //接受count个字节
string msg = System.Text.Encoding.UTF8.GetString(data, 0, count); //接收到的信息
Console.WriteLine(msg);
while (true)
{
string s = Console.ReadLine();
if (s=="c")
{
clientSocket.Close(); return;
}
byte[] buf = Encoding.UTF8.GetBytes(s);
clientSocket.Send(buf);
}
Console.ReadKey();
clientSocket.Close();
}
}
}
6，粘包和分包
粘包 如图所示 
分包问题， 把一个特别长的字符串分割成多条信息发送
7，粘包和分包的解决方案
8，在客户端发送数据时加上数据的长度，
现在我们要在客户端中做出一个类 ，这个类专门用来结合前面的个数和后面的内容，
代码实现如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace TCP客户端
{
class Message
{
public static byte[] GetBytes(string data)
{
byte[] dataBytes = Encoding.UTF8.GetBytes(data); //这个是要传递的数据的内容
int dataLength = dataBytes.Length;//这个是发送数据的长度
byte[] lengthBytes = BitConverter.GetBytes(dataLength); //前面的数据长度 的数组
byte[] newBytes = lengthBytes.Concat(dataBytes).ToArray(); //组成一个新的字节
return newBytes;
}
}
}
然后修改客户端的发送消息的情况；
代码实现如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace TCP客户端
{
class Program
{
static void Main(string[] args)
{
//创建客户端
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//与服务器建立连接0
clientSocket.Connect(new IPEndPoint(IPAddress.Parse("192.168.1.7"), 88));
byte[] data = new byte[1024]; //建立
int count = clientSocket.Receive(data); //接受count个字节
string msg = System.Text.Encoding.UTF8.GetString(data, 0, count); //接收到的信息
Console.WriteLine(msg);
//while (true)
//{
// string s = Console.ReadLine();
// if (s=="c")
// {
// clientSocket.Close(); return;
// }
// byte[] buf = Encoding.UTF8.GetBytes(s);
// clientSocket.Send(buf);
//}
for (int i = 0; i < 100; i++)
{
clientSocket.Send(Message.GetBytes(i.ToString()));
}
Console.ReadKey();
clientSocket.Close();
}
}
}
9，服务器端的接收和解析数据
修改服务器端代码 然后新建一个Message类进行解析数据
代码实现如下;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
namespace TCP服务端
{
class Program
{
static void Main(string[] args)
{
StartServerAsync();
Console.ReadKey();
}
static Message msg = new Message();
///
/// 直接加载
///
void StartServerSvnc()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
///向客户端发送消息
string msg = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msg); //转成字符串数组进行传递
clientSocket.Send(data);
/// 接收一条消息
///
byte[] dataBuffer = new byte[1024];
///数据没有填充满，前多少个有数据 ,count 指接收到了多少数据
///
int count = clientSocket.Receive(dataBuffer);
string msgReceive = System.Text.Encoding.UTF8.GetString(dataBuffer, 0, count);
Console.WriteLine(msgReceive);
Console.ReadKey();
clientSocket.Close();//关闭客户端的连接
serverSocket.Close();//关闭自身的连接
}
///
/// 异步加载
///
static void StartServerAsync()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
///申请id 127.0.0.1 本机
//IPAddress ip = new IPAddress(new byte[] { 192, 168, 1, 7 });
IPAddress ipAddress = IPAddress.Parse("192.168.1.7");
//申请端口号
IPEndPoint endPoint = new IPEndPoint(ipAddress, 88);
//绑定ip和端口号
serverSocket.Bind(endPoint);
serverSocket.Listen(0);//开始监听端口号（0 没有数量限制）
//Socket clientSocket = serverSocket.Accept();//接收一个客户端的连接
// ///向客户端发送消息
//要想多个客户端连接就要把 客户端的连接的接收也做成异步的
/* Socket clientSocket = */
serverSocket.BeginAccept(AsyncCallback, serverSocket);
}
////异步加载
static void AsyncCallback(IAsyncResult ar)
{
//把传进来的server进行转型，
////如果不添加try catch 异常捕捉的话 如果强制关闭一个客户端的话，服务器程序就会终止
Socket serverSocket = ar.AsyncState as Socket;
Socket clientSocket = serverSocket.EndAccept(ar); //完成接收
string msgStr = "Hello client ！你好。。";
byte[] data = System.Text.Encoding.UTF8.GetBytes(msgStr); //转成字符串数组进行传递
clientSocket.Send(data);
clientSocket.BeginReceive(msg.Data, msg.StartIndex, msg.RemaniSize , SocketFlags.None, ReceiveCallBack, clientSocket);
serverSocket.BeginAccept(AsyncCallback, serverSocket); //再次调用 处理下一个客户端的连接
}
static byte[] dataBuffor = new byte[1024];
static void ReceiveCallBack(IAsyncResult ar)
{
Socket clientSocket = null;
try
{
clientSocket = ar.AsyncState as Socket;
int count = clientSocket.EndReceive(ar); //v结束挂起的异步读取。接收到的字节数。
///count是读取到的数据， 也就是StartIndex
if (count==0) //如果输入‘c’ 客户端正常关闭 服务器会一直接收到空数据， 通过判断接受到的长度 如果为0 是正常关闭 关闭客户端 return就好了
{
clientSocket.Close();return;
}
msg.AddCount(count);//更新了message的count
///在message那边解析接收到的数据；
msg.ReadMessage();
clientSocket.BeginReceive(msg.Data, msg.StartIndex, msg.RemaniSize, SocketFlags.None, ReceiveCallBack, clientSocket); //等待客户端的再次发送
///这种读取的方式不对， 我们就不用这种了！
//string msgs= Encoding.UTF8.GetString(dataBuffor, 0, count);
//Console.WriteLine("客户端接受到的数据为： " + msgs);
// clientSocket.BeginReceive(dataBuffor, 0, 1024, SocketFlags.None, ReceiveCallBack, clientSocket);
}
catch (Exception e)
{
Console.WriteLine(e);
if (clientSocket != null)
{
clientSocket.Close();
}
}
}
}
}
Message类：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace TCP服务端
{
class Message
{
private byte[] data = new byte[1024]; //这个数组用来存取我们读取到的数据，让消息的长度最少能存的下1024 ，如果说最大的消息数组存不下的话 就没办法完整的读取这条消息了
//如果消息不完整 我们不处理。我们会读取下一条
private int startIndex = 0;//标识位，表示现在数据存储在什么位置了 ，如果没数据 sartIndex从0开始，如果存了10个之后 这个startIndex就等于10；
//再来数据的话就从10开始存，同时也代表了存了多少个字节的数据。
///
/// 这个数组用来存取我们读取到的数据
///
public byte[] Data
{
get { return data; }
}
///
/// 代表存储了多少个字节的数据
///
public int StartIndex
{
get { return startIndex; }
}
///
/// 剩余的空间
///
public int RemaniSize
{
get { return data.Length - startIndex; }
}
///
/// 更新了多少数据
///
///
public void AddCount(int count)
{
startIndex += count;
}
///
/// 解析数据或者叫做读取数据
///
public void ReadMessage()
{
while (true)
{
if (startIndex <= 4) return;
int count = BitConverter.ToInt32(data, 0);//这个只占前四个字节 ，变成int 就是数据长度
if ((startIndex - 4) >= count) //(startIndex-4)是剩余数据的长度 ，大于count 就说明数据是完整的
{
string s = Encoding.UTF8.GetString(data, 4, count);
Console.WriteLine("解析出来一条数据 :" + s);
Array.Copy(data, count + 4, data, 0, startIndex - 4 - count);
startIndex -= (count + 4); //移动完了之后更新startIndex
}
else
{
break;
}
}
}
}
}
切记修改完成后要从新生成一下！！
10，C#连接mysql数据库 前面的博客中也有些到。
可以参考http://blog.csdn.net/qq_36848370/article/details/76558718
先引入 C盘下的 Program Files（86） 下的 MySQL下的 Connector.net 6.9 下的Assemblies 下的 v4.5 下的 MySql.Data.dll
代码实现如下 ：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;
namespace MySql数据库操作
{
class Program
{
static void Main(string[] args)
{
string connStr = "Database=test007;Data Source=127.0.0.1;port=3306;User Id=root;Password=root";
MySqlConnection conn = new MySqlConnection(connStr);
conn.Open();
#region 查询
#region 读取多条
//MySqlCommand cmd = new MySqlCommand("select * from user ", conn);
#endregion
#region 读取一条
// MySqlCommand cmd = new MySqlCommand("select * from user where id = 1", conn);
#endregion
//MySqlDataReader reader = cmd.ExecuteReader();
#region 读取一条
// if (reader.HasRows) //得到一个值指示是否MySqlDataReader包含一个或多个行。
// {
//reader.Read(); //表示读取一条消息，多次读取多次调用
//string username = reader.GetString("username");
//string passwore = reader.GetString("password");
//Console.WriteLine(username + " " + passwore);
// }
#endregion
#region 读取多条
//while (reader.Read())
//{
// string username = reader.GetString("username");
// string passwore = reader.GetString("password");
// Console.WriteLine(username + " " + passwore);
//}
#endregion
//reader.Close();
#endregion
#region 插入
string username = "zain"; string password = "zain"; ///用户组拼 有bug 用户可以恶意输入sql语句 下节课再解决
MySqlCommand cmd = new MySqlCommand("insert into user set username='" + username + "'" + ", password='" + password + "'", conn);
cmd.ExecuteNonQuery();//执行插入 并返回插入的行数
Console.WriteLine(cmd.ExecuteNonQuery());
#endregion
conn.Close();
Console.ReadKey();
}
}
}
请看（二）。