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//TcpServer的辅助类
using System;
using System.IO;
using System.Text;
namespace TcpServer
{
/// <summary>
/// 控制台应用程序的帮助类PictureHelper
/// </summary>
public static class PictureHelper
{
//LIST请求:在字节数组中返回文件列表
public static byte[] GetFileListBytes()
{
string[] files = PictureHelper.GetFileList(); //调用GetFileList函数获取文件列表
StringBuilder responseMessage = new StringBuilder();
foreach (string s in files)
{
responseMessage.Append(s);
responseMessage.Append(":");
}
byte[] responseBuffer = Encoding.ASCII.GetBytes(responseMessage.ToString());
return responseBuffer;
}
// 以字符形式返回所有文件的列表, 供GetFileListBytes调用
private static string[] GetFileList()
{
string[] files = Directory.GetFiles(Properties.Settings.Default.PictureDirectory);
for (int i = 0; i < files.Length; i++)
{
files[i] = Path.GetFileName(files[i]);
}
return files;
}
//返回图片文件的字节数组
public static byte[] GetPictureBytes(string filename)
{
FileInfo fileInfo = new FileInfo(filename);
byte[] buffer = new byte[fileInfo.Length];
using (FileStream stream = fileInfo.OpenRead())
{
stream.Read(buffer, 0, buffer.Length);
}
return buffer;
}
}
}
//服务器端
#region Using directives
using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
#endregion
namespace TcpServer
{
class Program
{
static void Main(string[] args)
{
//创建TcpListener对象, 并指定端口号
System.Net.Sockets.TcpListener listener = new System.Net.Sockets.TcpListener(IPAddress.Any, 8888);
listener.Start(); //启动监听
while (true)
{
const int bufferSize = 256;
TcpClient client = listener.AcceptTcpClient(); //等待客户机与它连接
NetworkStream clientStream = client.GetStream(); //返回一个NetworkStream对象
byte[] buffer = new byte[bufferSize];
int readBytes = 0;
readBytes = clientStream.Read(buffer, 0, bufferSize); //将网络流中的数据读入到字节数组
string request = Encoding.ASCII.GetString(buffer).Substring(0, readBytes); //将字节级数转换为字符串
//根据请求字符串, 把一个图片文件列表或图片字节返回给客户机
if (request.StartsWith("LIST"))
{
byte[] responseBuffer = PictureHelper.GetFileListBytes(); //得到文件列表的字节数组形式
clientStream.Write(responseBuffer, 0, responseBuffer.Length); //写入网络流, 发回客户机
}
else if (request.StartsWith("FILE"))
{
string[] requestMessage = request.Split(':');
string filename = requestMessage[1]; //requestMessage[0]="FILE" requestMessage[1]=文件名
//读出指定的图像文件的数据
byte[] data = File.ReadAllBytes(Path.Combine(Properties.Settings.Default.PictureDirectory, filename));
clientStream.Write(data, 0, data.Length); //写入网络流, 发回客户机
}
else
{
// 未知的请求
}
clientStream.Close(); //关闭连接
}
}
}
}
#region Using directives
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Text;
#endregion
namespace WinTcpClient
{
partial class PictureClientForm : Form
{
public PictureClientForm()
{
InitializeComponent();
}
//获取文件列表
private void OnListPictures(object sender, EventArgs e)
{
const int bufferSize = 256;
TcpClient client = new TcpClient(); //创建TcipClient对象
IPHostEntry host = Dns.GetHostEntry("192.168.1.109"); //指定服务器地址
client.Connect(host.AddressList[0], 8888); //连接主机
//使用NetworkStream可以把数据发送给服务器,NetworkStream可以使用TcpClient对象的GetStream()方法访问.
//要写入的数据可以使用NetworkStream方法发送给服务器
NetworkStream clientStream = client.GetStream();
string request = "LIST"; //发送LIST请求
byte[] requestBuffer = Encoding.ASCII.GetBytes(request);
clientStream.Write(requestBuffer, 0, requestBuffer.Length);
byte[] responseBuffer = new byte[bufferSize];
MemoryStream memStream = new MemoryStream();
int bytesRead = 0;
do
{
//从服务器返回的数据用clientStream对象的Read()方法读取,由于不能肯定有多少
//数据从服务器上返回,所以使用循环读取数据. 所读取的数据追加到MemoryStream
//中, 该对象可以自动调整大小
bytesRead = clientStream.Read(responseBuffer, 0, bufferSize);
memStream.Write(responseBuffer, 0, bytesRead);
}
while (bytesRead > 0);
clientStream.Close();
client.Close(); //关闭连接
byte[] buffer = memStream.GetBuffer(); //得到字节数组
string response = Encoding.ASCII.GetString(buffer); //转换为字符
string[] fileNames = response.Split(':');
this.listFiles.DataSource = fileNames; //显示文件列表
}
//获得图片
private void OnDownladPicture(object sender, EventArgs e)
{
const int bufferSize = 256;
TcpClient client = new TcpClient(); //创建TcipClient对象
IPHostEntry host = Dns.GetHostEntry("192.168.1.109"); //指定服务器地址
client.Connect(host.AddressList[0], 8888); //连接主机
NetworkStream clientStream = client.GetStream();
string request = "FILE:" + this.listFiles.SelectedItem.ToString(); //设置请求文件
byte[] requestBuffer = Encoding.ASCII.GetBytes(request); //发送FILE请求
clientStream.Write(requestBuffer, 0, requestBuffer.Length);
byte[] responseBuffer = new byte[bufferSize];
MemoryStream memStream = new MemoryStream();
int bytesRead = 0;
do
{
bytesRead = clientStream.Read(responseBuffer, 0, bufferSize);
memStream.Write(responseBuffer, 0, bytesRead); //读出数据
}
while (bytesRead > 0);
clientStream.Close();
client.Close(); //关闭连接
Image picture = Image.FromStream(memStream); //得到图像并显示
this.pictureBox.Image = picture;
}
}
}