我尝试使用System.Net.Socket在c＃中创建一个带有客户端 - 服务器图的简单计算器。一切正常，但在服务器端，当我尝试转换从客户端接收的值时，它总是将值转换为十进制，而不是整数，但我尝试了很多次，仍然没有解决。
例如，当客户输入a = 5和b = 5的值时，在服务器端，它转到53和53.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace Server_Fix
{
class Program
{
private static int SendVarData(Socket s, byte[] data)
{
int total = 0;
int size = data.Length;
int dataleft = size;
int sent;
byte[] datasize = new byte[4];
datasize = BitConverter.GetBytes(size);
sent = s.Send(datasize);
while (total < size)
{
sent = s.Send(data, total, dataleft, SocketFlags.None);
total += sent;
dataleft -= sent;
}
return total;
}
private static byte[] ReceiveVarData(Socket s)
{
int total = 0;
int recv;
byte[] datasize = new byte[4];
recv = s.Receive(datasize, 0, 4, 0);
int size = BitConverter.ToInt32(datasize,0);
int dataleft = size;
byte[] data = new byte[size];
while (total < size)
{
recv = s.Receive(data, total, dataleft, 0);
if (recv == 0)
{
data = Encoding.ASCII.GetBytes("exit ");
break;
}
total += recv;
dataleft -= recv;
}
return data;
}
public static void Main()
{
byte[] data = new byte[1024];
byte[] data1 = new byte[1024];
byte[] data2 = new byte[1024];
byte[] data3 = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);
Socket newsock = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
newsock.Bind(ipep);
newsock.Listen(10);
Console.WriteLine("Waiting for a client...");
Socket client = newsock.Accept();
IPEndPoint newclient = (IPEndPoint)client.RemoteEndPoint;
Console.WriteLine("Connected with {0} at port {1}",
newclient.Address, newclient.Port);
string welcome = "CALCULATOR CLIENT-SERVER DIAGRAM!";
data = Encoding.ASCII.GetBytes(welcome);
int sent = SendVarData(client, data);
string phepToan;
int result=0;
int a = 0, b = 0;
while(true)
{
sent = SendVarData(client, Encoding.ASCII.GetBytes("Nhap vao so a: "));
data1 = ReceiveVarData(client);
//Console.WriteLine("Client: " + Encoding.ASCII.GetString(data));
sent = SendVarData(client, Encoding.ASCII.GetBytes("Nhap vao so b: "));
data2 = ReceiveVarData(client);
//b = Convert.ToInt32(data2);
sent = SendVarData(client, Encoding.ASCII.GetBytes("Cho biet phep tinh can dung la | + | - | * | / |: "));
data3 = ReceiveVarData(client);
phepToan = Encoding.ASCII.GetString(data3);
//a = Convert.ToString(Encoding.ASCII.GetString(data1));
if (phepToan=="+")
{
foreach (byte byteValue in data1)
{
a = Convert.ToChar(byteValue); //It's always turn to Decimal values
}
foreach (byte byteValue in data2)
{
b = Convert.ToChar(byteValue); //It's always turn to Decimal values
}
result = a + b;
sent = SendVarData(client, Encoding.ASCII.GetBytes("Ket qua phep tinh: "+Convert.ToString(result)));
}
if (phepToan == "-")
{
}
if (phepToan == "*")
{
}
if (phepToan == "/")
{
}
}
Console.WriteLine("Disconnected from {0}", newclient.Address);
client.Close();
newsock.Close();
Console.ReadLine();
}
}
}
=============================================== ================= 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 Client_Fix
{
class Program
{
private static int SendVarData(Socket s, byte[] data)
{
int total = 0;
int size = data.Length;
int dataleft = size;
int sent;
byte[] datasize = new byte[4];
datasize = BitConverter.GetBytes(size);
sent = s.Send(datasize);
while (total < size)
{
sent = s.Send(data, total, dataleft, SocketFlags.None);
total += sent;
dataleft -= sent;
}
return total;
}
private static byte[] ReceiveVarData(Socket s)
{
int total = 0;
int recv;
byte[] datasize = new byte[4];
recv = s.Receive(datasize, 0, 4, 0);
int size = BitConverter.ToInt32(datasize,0);
int dataleft = size;
byte[] data = new byte[size];
while (total < size)
{
recv = s.Receive(data, total, dataleft, 0);
if (recv == 0)
{
data = Encoding.ASCII.GetBytes("exit ");
break;
}
total += recv;
dataleft -= recv;
}
return data;
}
public static void Main()
{
byte[] data = new byte[1024];
int sent;
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
try
{
server.Connect(ipep);
}
catch (SocketException e)
{
Console.WriteLine("Unable to connect to server.");
Console.WriteLine(e.ToString());
return;
}
string input;
data = ReceiveVarData(server);
string stringData = Encoding.ASCII.GetString(data);
Console.WriteLine(stringData);
while (true)
{
data = ReceiveVarData(server);
Console.Write("Server: " + Encoding.ASCII.GetString(data));
Console.WriteLine("You: " + input);
sent = SendVarData(server, Encoding.ASCII.GetBytes(input));
data = ReceiveVarData(server);
Console.Write("Server: " + Encoding.ASCII.GetString(data));
input = Console.ReadLine();
//Console.SetCursorPosition(0, Console.CursorTop - 1);
Console.WriteLine("You: " + input);
sent = SendVarData(server, Encoding.ASCII.GetBytes(input));
data = ReceiveVarData(server);
Console.Write("Server: " + Encoding.ASCII.GetString(data));
input = Console.ReadLine();
//Console.SetCursorPosition(0, Console.CursorTop - 1);
Console.WriteLine("You: " + input);
sent = SendVarData(server, Encoding.ASCII.GetBytes(input));
data = ReceiveVarData(server);
Console.WriteLine("Server: " + Encoding.ASCII.GetString(data));
}
Console.WriteLine("Disconnecting from server...");
server.Shutdown(SocketShutdown.Both);
server.Close();
Console.ReadLine();
}
}
}
答案 0 :(得分：0)
我们假设byteValue是53，这是角色的代码点＆＃39; 5＆＃39;。
然后
Convert.ToChar(byteValue)
将给出53.那很好，C＃中的字符有一个数值，这是它们在字符表中的序数。
解决问题的一种方法是：
var a = int.Parse(ASCIIEncoding.ASCII.GetString(new byte[] { bytevalue }));
或者，再次有一些推测，更有可能：
var a = int.Parse(ASCIIEncoding.ASCII.GetString(data1));
这里，字符数字＆＃39; 5＆＃39;的数字表示。当它通过电线（如53）时，将在ASCII表中查找，给出＆＃34; 5＆＃34;，然后解析为所需的整数。
但它并没有解决整个代码的根本问题，这需要更加全面地规划如何以可靠的方式编码，传输和随后解码信息比特。