6
我想了解一些关于套接字编程，我偶然发现TcpListener和TcpClient使用，因为我读它们对初学者来说稍微容易一些。 我想要完成的基本任务是制作一个小型表单，可以在我的笔记本电脑和另一台笔记本电脑上运行，并且可以进行通信，即发送一串文本给对方。一旦我有这个，我会希望进一步发展:)设置一个TCP/IP客户端和服务器通过网络进行通信
到目前为止，我创建了一个客户端和服务器程序使用msdn和各种指南在互联网上找到。当我在一台笔记本电脑上运行时，我可以让他们进行通信，但当我将客户端移动到另一台笔记本电脑时，我无处可去。我认为我的主要问题是我不太了解客户端如何找到服务器IP，因为我认为我可以对其进行硬编码，但是当我再次回来时，我确信IP会发生变化。有没有办法让这两者以更具活力的方式进行连接，以涵盖不断变化的IP？ 我的客户代码：
public void msg(string mesg)
{
lstProgress.Items.Add(">> " + mesg);
}
private void btnConnect_Click(object sender, EventArgs e)
{
string message = "Test";
try
{
// Create a TcpClient.
// Note, for this client to work you need to have a TcpServer
// connected to the same address as specified by the server, port
// combination.
Int32 port = 1333;
TcpClient client = new TcpClient(<not sure>, port); //Unsure of IP to use.
// Translate the passed message into ASCII and store it as a Byte array.
Byte[] data = System.Text.Encoding.ASCII.GetBytes(message);
// Get a client stream for reading and writing.
// Stream stream = client.GetStream();
NetworkStream stream = client.GetStream();
// Send the message to the connected TcpServer.
stream.Write(data, 0, data.Length);
lstProgress.Items.Add(String.Format("Sent: {0}", message));
// Receive the TcpServer.response.
// Buffer to store the response bytes.
data = new Byte[256];
// String to store the response ASCII representation.
String responseData = String.Empty;
// Read the first batch of the TcpServer response bytes.
Int32 bytes = stream.Read(data, 0, data.Length);
responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);
lstProgress.Items.Add(String.Format("Received: {0}", responseData));
// Close everything.
stream.Close();
client.Close();
}
catch (ArgumentNullException an)
{
lstProgress.Items.Add(String.Format("ArgumentNullException: {0}", an));
}
catch (SocketException se)
{
lstProgress.Items.Add(String.Format("SocketException: {0}", se));
}
}
我当前的服务器代码：
private void Prog_Load(object sender, EventArgs e)
{
bw.WorkerSupportsCancellation = true;
bw.WorkerReportsProgress = true;
bw.DoWork += new DoWorkEventHandler(bw_DoWork);
bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
if (bw.IsBusy != true)
{
bw.RunWorkerAsync();
}
}
private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
lstProgress.Items.Add(e.UserState);
}
private void bw_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
if ((worker.CancellationPending == true))
{
e.Cancel = true;
}
else
{
try
{
// Set the TcpListener on port 1333.
Int32 port = 1333;
//IPAddress localAddr = IPAddress.Parse("127.0.0.1");
TcpListener server = new TcpListener(IPAddress.Any, port);
// Start listening for client requests.
server.Start();
// Buffer for reading data
Byte[] bytes = new Byte[256];
String data = null;
// Enter the listening loop.
while (true)
{
bw.ReportProgress(0, "Waiting for a connection... ");
// Perform a blocking call to accept requests.
// You could also user server.AcceptSocket() here.
TcpClient client = server.AcceptTcpClient();
bw.ReportProgress(0, "Connected!");
data = null;
// Get a stream object for reading and writing
NetworkStream stream = client.GetStream();
int i;
// Loop to receive all the data sent by the client.
while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
{
// Translate data bytes to a ASCII string.
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
bw.ReportProgress(0, String.Format("Received: {0}", data));
// Process the data sent by the client.
data = String.Format("I Have Received Your Message: {0}", data);
byte[] mssg = System.Text.Encoding.ASCII.GetBytes(data);
// Send back a response.
stream.Write(mssg, 0, mssg.Length);
bw.ReportProgress(0, String.Format("Sent: {0}", data));
}
// Shutdown and end connection
client.Close();
}
}
catch (SocketException se)
{
bw.ReportProgress(0, String.Format("SocketException: {0}", se));
}
}
}
正如你可能会说我是全新的，以本所以如果要实现这个我比一个更好的办法乐于学习！ 感谢提前:)任何帮助
我的解决方案由于以下问题的答案：
private String IPAddressCheck()
{
var IPAddr = Dns.GetHostEntry("HostName");
IPAddress ipString = null;
foreach (var IP in IPAddr.AddressList)
{
if(IPAddress.TryParse(IP.ToString(), out ipString) && IP.AddressFamily == AddressFamily.InterNetwork)
{
break;
}
}
return ipString.ToString();
}
private void btnConnect_Click(object sender, EventArgs e)
{
string message = "Test";
try
{
Int32 port = 1337;
string IPAddr = IPAddressCheck();
TcpClient client = new TcpClient(IPAddr, port);
我不知道这是否是最巧妙的解决方案，但它运作良好，所以，谢谢你的答案:)
如果你正在寻找一个通用的代码审查，我会建议发布到[CodeReview.SE]（http://codereview.stackexchange.com/）。如果您正在寻找特定问题的答案（“是否有任何方式让二者以更动态的方式连接以涵盖不断变化的IP？”），那么您应该将代码缩小到您所在的区域有问题。 – Bobson 2013-02-12 17:51:49
道歉Bobson我将在未来保持我的代码片段更短，更相关！感谢您的建议:) – 2013-02-13 09:29:42