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上一期为pc版，请特别注意。
/*
* 在此程序中用到的字符串传递的知识、64位整数传递的知识、系统文件夹的获取的技巧、启动一个线程并在线程中访问程序控件的知识等。
* 此程序在模拟器中调试的时候报错，但在真机中调试通过。
* 作者：2009.10.15 （费了九牛二虎之力呀！）
*/
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;
using System.IO;
using System.Net;
using SocketSample_2;
namespace SockectSample
{
public partial class Form1 : Form
{
//listen on custom tcp port
private const int port = 38080;
public Form1()
{
InitializeComponent();
System.Threading.Thread t = new System.Threading.Thread(new System.Threading.ThreadStart(ListenerThread));
t.IsBackground = true;
t.Name = "SocketListener";
t.Start();
}
private delegate void AppendToListBoxDelegate(string newItem);
private void AppendToListBox(string newItem)
{
listBox1.Items.Add(newItem);
}
//发送对象
private void button_SendObj_Click(object sender, EventArgs e)
{
//create prospect object
Prospect p = new Prospect();
p.Name = "qihuaifeng";
p.Company = "ahnu";
p.Number = "1";
TcpClient tc = new TcpClient();
tc.Connect(new IPEndPoint(IPAddress.Parse("127.0.0.1"), port));
NetworkStream ns = tc.GetStream();
StreamWriter sw = new StreamWriter(ns);
sw.AutoFlush = true;
StreamReader sr = new StreamReader(ns);
try
{
sw.WriteLine("PROSPECT");
sw.WriteLine(p.ToString());
sw.Flush();
string response = sr.ReadLine();
switch (response)
{
case "PROSPECT_OK":
this.Invoke(new AppendToListBoxDelegate(AppendToListBox), new object[] { "数据写入成功!" });
break;
case "PROSPECT_ERROR":
this.Invoke(new AppendToListBoxDelegate(AppendToListBox), new object[] { "数据写入失败!" });
break;
}
}
catch (SocketException se)
{
MessageBox.Show("Socket Exception trying to send: " + se.ToString());
}
finally
{
ns.Close();
}
}
//发送文件
private void button_SendFile_Click(object sender, EventArgs e)
{
//pick a file
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
//only perform if file was selected
TcpClient tc = new TcpClient();
tc.Connect(new IPEndPoint(IPAddress.Parse("127.0.0.1"), port));
NetworkStream ns = tc.GetStream();
try
{
//send a header to show it will be followed by a binary file
byte[] header = System.Text.Encoding.UTF8.GetBytes("FILE\r\n");
ns.Write(header, 0, header.Length);
//send the filename
string filename = Path.GetFileName(openFileDialog1.FileName);
header = System.Text.Encoding.UTF8.GetBytes(filename + "\r\n");
ns.Write(header, 0, header.Length);
//send the file length (int64 - 8 bytes)
FileInfo fi = new FileInfo(openFileDialog1.FileName);
byte[] buffer = BitConverter.GetBytes(fi.Length);
ns.Write(buffer, 0, buffer.Length);
//特别注意，此处buffer的长度肯定是8 （以下输出样例来自MSDN）
/*
This example of the BitConverter.GetBytes( int )
method generates the following output.
int byte array
--- ----------
0 00-00-00-00
15 0F-00-00-00
-15 F1-FF-FF-FF
1048576 00-00-10-00
-1048576 00-00-F0-FF
1000000000 00-CA-9A-3B
-1000000000 00-36-65-C4
-2147483648 00-00-00-80
2147483647 FF-FF-FF-7F
*/
//send the file contents
FileStream fs = new FileStream(openFileDialog1.FileName, FileMode.Open);
buffer = new byte[fs.Length];
fs.Read(buffer, 0, (int)fs.Length);
ns.Write(buffer, 0, buffer.Length);
fs.Close();
}
catch (SocketException se)
{
MessageBox.Show(se.NativeErrorCode.ToString() + ": " + se.ToString());
}
finally
{
ns.Close();
tc.Close();
}
MessageBox.Show("文件发送完毕!");
}
}
private void ListenerThread()
{
TcpListener listener = new TcpListener(new IPEndPoint(IPAddress.Any, port));
listener.Start();
try
{
while (true)
{
this.Invoke(new AppendToListBoxDelegate(AppendToListBox), new object[] { "等待客户端连接... ..." });
TcpClient incomingClient = listener.AcceptTcpClient();
//get address of remove device
IPAddress senderAddress = ((IPEndPoint)incomingClient.Client.RemoteEndPoint).Address;
//get a stream to read from the socket
NetworkStream ns = incomingClient.GetStream();
try
{
StreamReader sr = new StreamReader(ns, System.Text.UTF8Encoding.UTF8);
StreamWriter sw = new StreamWriter(ns, System.Text.UTF8Encoding.UTF8);
sw.AutoFlush = true;
string operation = sr.ReadLine();
if (operation == "exit")
{
Application.Exit();
break;
}
if (operation == "PROSPECT")
{
string rawProspect = sr.ReadLine();
string[] fields = rawProspect.Split(',');
if (fields.Length == 3)
{
sw.WriteLine("PROSPECT_OK");
}
else
{
sw.WriteLine("PROSPECT_ERROR");
}
Prospect receivedProspect = new Prospect();
receivedProspect.Name = fields[0];
receivedProspect.Company = fields[1];
receivedProspect.Number = fields[2];
this.Invoke(new AppendToListBoxDelegate(AppendToListBox), new object[] {"接收到_PROSPECT:" + senderAddress.ToString() + " " + receivedProspect.ToString()});
}
if (operation == "FILE")
{
string filename = sr.ReadLine();
byte[] len = new byte[8];
ns.Read(len, 0, 8);
Int64 fileSize = BitConverter.ToInt64(len, 0);
FileStream fs = new FileStream(Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.Personal), filename), FileMode.CreateNew);
byte[] buffer = new byte[4096];
/* 第一种方案，考虑文件大小
int bytesread = ns.Read(buffer, 0, buffer.Length);
int totalbytesread = bytesread;
try
{
do
{
fs.Write(buffer, 0, bytesread);
bytesread = ns.Read(buffer, 0, buffer.Length);
totalbytesread += bytesread;
} while (totalbytesread < fileSize);
fs.Close();
this.Invoke(new AppendToListBoxDelegate(AppendToListBox), new object[] { senderAddress.ToString() + " " + filename });
}
catch
{
MessageBox.Show("在接收文件过程中发生错误!");
}
*/
//第二种方案，不考虑文件大小
try
{
int bytesRead = 0;
do
{
bytesRead = ns.Read(buffer, 0, 4096);
fs.Write(buffer, 0, bytesRead);
} while (bytesRead > 0);
fs.Close();
}
catch
{
MessageBox.Show("在接收文件过程中发生错误!");
}
//结论，以上两种方案都可以。次程序在模拟上报错，在真机上测试通过
}
}
catch (System.Net.Sockets.SocketException e)
{
ns.Close();
this.Invoke(new AppendToListBoxDelegate(AppendToListBox), new object[] { e.ErrorCode.ToString() + e.Message + " ERROR" });
}
}//end while
}
catch(System.Net.Sockets.SocketException e)
{
MessageBox.Show(e.Message+e.ErrorCode.ToString()+"失败!" );
}
finally
{
//stop the listener
listener.Stop();
}
}//end ListenerThread
private void menuItem1_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void button_exit_Click(object sender, EventArgs e)
{
TcpClient tc = new TcpClient();
tc.Connect(new IPEndPoint(IPAddress.Parse("127.0.0.1"), port));
NetworkStream ns = tc.GetStream();
StreamWriter sw = new StreamWriter(ns);
sw.AutoFlush = true;
try
{
sw.WriteLine("exit");
}
catch (SocketException se)
{
MessageBox.Show("Socket Exception trying to send: " + se.ToString());
}
finally
{
ns.Close();
}
}
}
}