套接字编程 - 连接尝试失败异常
本文关键字:失败 异常 连接 编程 套接字 | 更新日期: 2023-09-27 18:35:23
我是套接字编程的新手,正在创建一个聊天应用程序。与其他应用程序一样,每当我在聊天窗口中按回车键时,它应该将聊天发送给特定用户。每当我选择一个用户发送聊天时,我都会为所有用户维护一个数据库以及他们的 IPAddresses.So 它应该发送到相应的 IPAddress.As 现在正在尝试将聊天发送到我自己的机器(所以我硬编码了我的机器的 IPAddress)。但是当我尝试将我的代码发送到我的 IPAddress 时,我遇到了异常。任何人都可以帮助我吗?
我的套接字编程代码是这样的
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
using System.Net.Sockets;
namespace Ping
{
class SocketProgramming
{
//Socket m_socWorker;
public AsyncCallback pfnWorkerCallBack;
public Socket m_socListener;
public Socket m_socWorker;
public void sendChat(IPAddress toMessengerIP)
{
try
{
//create a new client socket ...
m_socWorker = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
String szIPSelected = toMessengerIP.ToString();
String szPort = "7777";
int alPort = System.Convert.ToInt16(szPort, 10);
System.Net.IPAddress remoteIPAddress = System.Net.IPAddress.Parse(szIPSelected);
System.Net.IPEndPoint remoteEndPoint = new System.Net.IPEndPoint(remoteIPAddress, alPort);
// receive();
m_socWorker.Connect(remoteEndPoint);
//Send data
Object objData =(object)"hi dhivi";
byte[] byData = System.Text.Encoding.ASCII.GetBytes(objData.ToString());
m_socWorker.Send(byData);
}
catch (System.Net.Sockets.SocketException se)
{
//MessageBox.Show(se.Message);
Console.Out.Write(se.Message);
}
}
public void receive()
{
try
{
//create the listening socket...
m_socListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ipLocal = new IPEndPoint(IPAddress.Any, 7777);
//bind to local IP Address...
m_socListener.Bind(ipLocal);
//start listening...
m_socListener.Listen(4);
// create the call back for any client connections...
m_socListener.BeginAccept(new AsyncCallback(OnClientConnect), null);
//cmdListen.Enabled = false;
}
catch (SocketException se)
{
Console.Out.Write(se.Message);
}
}
public void OnClientConnect(IAsyncResult asyn)
{
try
{
m_socWorker = m_socListener.EndAccept(asyn);
WaitForData(m_socWorker);
}
catch (ObjectDisposedException)
{
System.Diagnostics.Debugger.Log(0, "1", "'n OnClientConnection: Socket has been closed'n");
}
catch (SocketException se)
{
Console.Out.Write(se.Message);
}
}
public class CSocketPacket
{
public System.Net.Sockets.Socket thisSocket;
public byte[] dataBuffer = new byte[1];
}
public void WaitForData(System.Net.Sockets.Socket soc)
{
try
{
//if (pfnWorkerCallBack == null)
//{
// pfnWorkerCallBack = new AsyncCallback(OnDataReceived);
//}
CSocketPacket theSocPkt = new CSocketPacket();
theSocPkt.thisSocket = soc;
// now start to listen for any data...
soc.BeginReceive(theSocPkt.dataBuffer, 0, theSocPkt.dataBuffer.Length, SocketFlags.None, pfnWorkerCallBack, theSocPkt);
}
catch (SocketException se)
{
Console.Out.Write(se.Message);
}
}
}
}
每当用户单击输入按钮时,它都应该调用 sendChat() 方法。
private void txt_Userinput_KeyDown_1(Object sender, KeyEventArgs e) {
Window parentWindow = Window.GetWindow(this);
TabItem tb = (TabItem)this.Parent;
string user = tb.Header.ToString();
if (e.Key == Key.Return)
{
richtxtbox_chatwindow.AppendText(Environment.NewLine + user + " : " + txt_Userinput.Text);
DBCoding dbObject = new DBCoding();
SocketProgramming socketObj = new SocketProgramming();
socketObj.sendChat(IPAddress.Parse("192.168.15.41"));
}
else { return; }
}
获取用户的 IP 地址
public IPAddress getIP()
{
String direction = "";
WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
using (WebResponse response = request.GetResponse())
using (StreamReader stream = new StreamReader(response.GetResponseStream()))
{
direction = stream.ReadToEnd();
}
//Search for the ip in the html
int first = direction.IndexOf("Address: ") + 9;
int last = direction.LastIndexOf("</body>");
direction = direction.Substring(first, last - first);
IPAddress ip = IPAddress.Parse(direction);
return ip;
}
你似乎从来没有调用过你的receive
方法。如果您的应用程序从未开始侦听,则没有人能够连接。如果您已经尝试过,并且遇到异常,请发布该内容,我们将从那里开始。