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.Threading;
namespace TcpClientTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
TcpClient tcp = null;
NetworkStream workStream = null;
private enum DataMode { Text, Hex }
private char[] HexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'a', 'b', 'c', 'd', 'e', 'f' };
private bool CharInArray(char aChar, char[] charArray)
{
return (Array.Exists<char>(charArray, delegate(char a) { return a == aChar; }));
}
///
/// 十六进制字符串转换字节数组
///
///
///
private byte[] HexStringToByteArray(string s)
{
// s = s.Replace(" ", "");
StringBuilder sb = new StringBuilder(s.Length);
foreach (char aChar in s)
{
if (CharInArray(aChar, HexDigits))
sb.Append(aChar);
}
s = sb.ToString();
int bufferlength;
if ((s.Length % 2) == 1)
bufferlength = s.Length / 2 + 1;
else bufferlength = s.Length / 2;
byte[] buffer = new byte[bufferlength];
for (int i = 0; i < bufferlength - 1; i++)
buffer[i] = (byte)Convert.ToByte(s.Substring(2 * i, 2), 16);
if (bufferlength > 0)
buffer[bufferlength - 1] = (byte)Convert.ToByte(s.Substring(2 * (bufferlength - 1), (s.Length % 2 == 1 ? 1 : 2)), 16);
return buffer;
}
///
/// 字节数组转换十六进制字符串
///
///
///
private string ByteArrayToHexString(byte[] data)
{
StringBuilder sb = new StringBuilder(data.Length * 3);
foreach (byte b in data)
sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
return sb.ToString().ToUpper();
}
///
/// 当前接收模式
///
private DataMode CurrentReceiveDataMode
{
get
{
return (chkHexReceive.Checked) ? DataMode.Hex : DataMode.Text;
}
set
{
chkHexReceive.Checked = (value == DataMode.Text);
}
}
///
/// 当前发送模式
///
private DataMode CurrentSendDataMode
{
get
{
return (chkHexSend.Checked) ? DataMode.Hex : DataMode.Text;
}
set
{
chkHexSend.Checked = (value == DataMode.Text);
}
}
///
/// 发送数据
///
private void SendData()
{
if (workStream != null)
{
byte[] data;
if (CurrentSendDataMode == DataMode.Text)
{
data = Encoding.ASCII.GetBytes(rtfSend.Text);
}
else
{
// 转换用户十六进制数据到字节数组
data = HexStringToByteArray(rtfSend.Text);
}
workStream.Write(data,0,data.Length);
}
}
delegate void SetTextCallback(string text);
delegate void SetControl();
delegate void GetData(byte[] data);
///
/// 异步接收数据
///
///
private void OnGetData(byte[] data)
{
string sdata;
if (CurrentReceiveDataMode == DataMode.Text)
{
sdata = new string(Encoding.UTF8.GetChars(data));
}
else
{
sdata = ByteArrayToHexString(data);
}
rtfReceive.Invoke(new EventHandler(delegate
{
rtfReceive.AppendText(sdata);
}));
}
///
/// 异步设置Log
///
///
private void SetText(string text)
{
if (rtfLog.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.Invoke(d, new object[] { text });
}
else
{
rtfLog.AppendText(text + Environment.NewLine);
}
}
public ManualResetEvent connectDone = new ManualResetEvent(false);
///
/// 异步连接的回调函数
///
///
private void ConnectCallback(IAsyncResult ar)
{
connectDone.Set();
TcpClient t = (TcpClient)ar.AsyncState;
try
{
if (t.Connected)
{
SetText("连接成功");
t.EndConnect(ar);
SetText("连接线程完成");
}
else
{
SetText("连接失败");
t.EndConnect(ar);
}
}
catch (SocketException se)
{
SetText("连接发生错误ConnCallBack.......:"+se.Message);
}
}
///
/// 异步连接
///
private void Connect()
{
if ((tcp == null) || (!tcp.Connected))
{
try
{
tcp = new TcpClient();
tcp.ReceiveTimeout = 10;
connectDone.Reset();
SetText("Establishing Connection to " + txtIP.Text);
tcp.BeginConnect(txtIP.Text, (int) numPort.Value,
new AsyncCallback(ConnectCallback), tcp);
connectDone.WaitOne();
if ((tcp != null) && (tcp.Connected))
{
workStream = tcp.GetStream();
SetText("Connection established");
asyncread(tcp);
}
}
catch (Exception se)
{
rtfLog.AppendText(se.Message+" Conn......."+Environment.NewLine);
}
}
}
///
/// 断开连接
///
private void DisConnect()
{
if ((tcp != null) && (tcp.Connected))
{
workStream.Close();
tcp.Close();
}
}
///
/// 设置控件状态
///
private void setBtnStatus()
{
if ((btnConnect.InvokeRequired) || (btnSend.InvokeRequired))
{
this.Invoke(new SetControl(setBtnStatus));
}
else
{
int con = ((tcp == null) || (!tcp.Connected)) ? 0 : 1;
string[] constr = { "连接", "断开" };
bool[] btnEnabled = { false, true };
btnConnect.Text = constr[con];
btnSend.Enabled = btnEnabled[con];
}
}
///
/// 连接按钮
///
///
///
private void btnConnect_Click(object sender, EventArgs e)
{
if ((tcp != null) && (tcp.Connected))
{
DisConnect();
}
else
{
Connect();
}
setBtnStatus();
}
///
/// 发送数据按钮
///
///
///
private void btnSend_Click(object sender, EventArgs e)
{
try
{
SendData();
}
catch (Exception se)
{
rtfLog.AppendText(se.Message+Environment.NewLine);
}
}
///
/// 异步读TCP数据
///
///
private void asyncread(TcpClient sock)
{
StateObject state = new StateObject();
state.client = sock;
NetworkStream stream = sock.GetStream();
if (stream.CanRead)
{
try
{
IAsyncResult ar = stream.BeginRead(state.buffer, 0, StateObject.BufferSize,
new AsyncCallback(TCPReadCallBack), state);
}
catch (Exception e)
{
SetText("Network IO problem " + e.ToString());
}
}
}
///
/// TCP读数据的回调函数
///
///
private void TCPReadCallBack(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
//主动断开时
if ((state.client == null) || (!state.client.Connected))
return;
int numberOfBytesRead;
NetworkStream mas = state.client.GetStream();
string type = null;
numberOfBytesRead = mas.EndRead(ar);
state.totalBytesRead += numberOfBytesRead;
SetText("Bytes read ------ "+ numberOfBytesRead.ToString());
if (numberOfBytesRead > 0)
{
byte[] dd = new byte[numberOfBytesRead];
Array.Copy(state.buffer,0,dd,0,numberOfBytesRead);
OnGetData(dd);
mas.BeginRead(state.buffer, 0, StateObject.BufferSize,
new AsyncCallback(TCPReadCallBack), state);
}
else
{
//被动断开时
mas.Close();
state.client.Close();
SetText("Bytes read ------ "+ numberOfBytesRead.ToString());
SetText("不读了");
mas = null;
state = null;
setBtnStatus();
}
}
}
internal class StateObject
{
public TcpClient client = null;
public int totalBytesRead = 0;
public const int BufferSize = 1024;
public string readType = null;
public byte[] buffer = new byte[BufferSize];
public StringBuilder messageBuffer = new StringBuilder();
}
}
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