C#使用UdpClient发送和接收UDP数据示例 16进制与字符串互转
2017-10-29 21:30
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C#使用UdpClient发送和接收UDP数据示例 16进制与字符串互转 - CSDN博客 http://blog.csdn.net/xuehuic/article/details/53812647
1.服务器
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using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Server(10086); //监听10086端口
}
/// <summary>
/// 服务器端
/// </summary>
/// <param name="port"></param>
static void Server(int port)
{
try
{
UdpClient udpclient = new UdpClient(port);
while (true)
{
IPEndPoint ipendpoint = null;
byte[] bytes = udpclient.Receive(ref ipendpoint); //停在这等待数据
string data = Encoding.Default.GetString(bytes, 0, bytes.Length);
Console.WriteLine("{0:HH:mm:ss}->接收数据(from {1}:{2}):{3}", DateTime.Now, ipendpoint.Address, ipendpoint.Port, data);
}
udpclient.Close();
}
catch (Exception ex)
{
Console.WriteLine("{0:HH:mm:ss}->{1}", DateTime.Now, ex.Message);
}
Console.ReadKey();
}
}
}
2.客户端
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using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Client("127.0.0.1", 10086, "play"); //发送数据
}
/// <summary>
/// 客户端
/// </summary>
/// <param name="ip"></param>
/// <param name="port"></param>
/// <param name="message"></param>
static void Client(string ip, int port, string message)
{
try
{
UdpClient udpclient = new UdpClient();
IPEndPoint ipendpoint = new IPEndPoint(IPAddress.Parse(ip), port);
byte[] data = Encoding.Default.GetBytes(message);
udpclient.Send(data, data.Length, ipendpoint);
udpclient.Close();
Console.WriteLine("{0:HH:mm:ss}->发送数据(to {1}):{2}", DateTime.Now, ip, message);
}
catch (Exception ex)
{
Console.WriteLine("{0:HH:mm:ss}->{1}", DateTime.Now, ex.Message);
}
Console.ReadKey();
}
}
}
3. 字符串转16进制,然后直接发送16进制。
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public static byte[] HexStringToByteArray(string s)
{
if (s.Length = 0)
throw new Exception("将16进制字符串转换成字节数组时出错,错误信息:被转换的字符串长度为0。");
s = s.Replace(" ", "");
byte[] buffer = new byte[s.Length / 2];
for (int i = 0; i < s.Length; i += 2)
buffer[i / 2] = Convert.ToByte(s.Substring(i, 2), 16);
return buffer;
}
4.16进制转字符串,接收端用于识别显示
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/// <summary>
/// 字节数组转换成十六进制字符串(不带空格)
/// </summary>
/// <param name="data">要转换的字节数组</param>
/// <returns>转换后的字符串</returns>
public static string ByteArrayToHexStringNoBlank(byte[] data)
{
StringBuilder sb = new StringBuilder(data.Length * 3);
foreach (byte b in data)
sb.Append(Convert.ToString(b, 16).PadLeft(2, '0'));
return sb.ToString().ToUpper();
}
1.服务器
[csharp] view
plain copy
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Server(10086); //监听10086端口
}
/// <summary>
/// 服务器端
/// </summary>
/// <param name="port"></param>
static void Server(int port)
{
try
{
UdpClient udpclient = new UdpClient(port);
while (true)
{
IPEndPoint ipendpoint = null;
byte[] bytes = udpclient.Receive(ref ipendpoint); //停在这等待数据
string data = Encoding.Default.GetString(bytes, 0, bytes.Length);
Console.WriteLine("{0:HH:mm:ss}->接收数据(from {1}:{2}):{3}", DateTime.Now, ipendpoint.Address, ipendpoint.Port, data);
}
udpclient.Close();
}
catch (Exception ex)
{
Console.WriteLine("{0:HH:mm:ss}->{1}", DateTime.Now, ex.Message);
}
Console.ReadKey();
}
}
}
2.客户端
[csharp] view
plain copy
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Client("127.0.0.1", 10086, "play"); //发送数据
}
/// <summary>
/// 客户端
/// </summary>
/// <param name="ip"></param>
/// <param name="port"></param>
/// <param name="message"></param>
static void Client(string ip, int port, string message)
{
try
{
UdpClient udpclient = new UdpClient();
IPEndPoint ipendpoint = new IPEndPoint(IPAddress.Parse(ip), port);
byte[] data = Encoding.Default.GetBytes(message);
udpclient.Send(data, data.Length, ipendpoint);
udpclient.Close();
Console.WriteLine("{0:HH:mm:ss}->发送数据(to {1}):{2}", DateTime.Now, ip, message);
}
catch (Exception ex)
{
Console.WriteLine("{0:HH:mm:ss}->{1}", DateTime.Now, ex.Message);
}
Console.ReadKey();
}
}
}
3. 字符串转16进制,然后直接发送16进制。
[csharp] view
plain copy
public static byte[] HexStringToByteArray(string s)
{
if (s.Length = 0)
throw new Exception("将16进制字符串转换成字节数组时出错,错误信息:被转换的字符串长度为0。");
s = s.Replace(" ", "");
byte[] buffer = new byte[s.Length / 2];
for (int i = 0; i < s.Length; i += 2)
buffer[i / 2] = Convert.ToByte(s.Substring(i, 2), 16);
return buffer;
}
4.16进制转字符串,接收端用于识别显示
[csharp] view
plain copy
/// <summary>
/// 字节数组转换成十六进制字符串(不带空格)
/// </summary>
/// <param name="data">要转换的字节数组</param>
/// <returns>转换后的字符串</returns>
public static string ByteArrayToHexStringNoBlank(byte[] data)
{
StringBuilder sb = new StringBuilder(data.Length * 3);
foreach (byte b in data)
sb.Append(Convert.ToString(b, 16).PadLeft(2, '0'));
return sb.ToString().ToUpper();
}
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