C# List使用Stream同时删除多个元素
时间: 2024-02-23 11:01:17 浏览: 27
在 C# 中,你可以使用 `Stream` 流来同时删除多个元素。以下是一个例子,演示如何使用 `Stream` 流来同时删除多个元素:
```csharp
List<int> numbers = new List<int>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
List<int> numbersToRemove = new List<int>() { 2, 4, 6, 8, 10 };
// 创建一个新的 List,其中包含所有要保留的元素
List<int> numbersToKeep = numbers.Where(x => !numbersToRemove.Contains(x)).ToList();
// 输出剩余元素
foreach (int number in numbersToKeep)
{
Console.WriteLine(number);
}
```
在这个例子中,我们使用 `Stream` 流来删除多个元素。我们创建了一个名为 `numbersToRemove` 的 `List` 对象,它包含要删除的元素。然后,我们使用 `Where` 方法创建一个新的 `List` 对象,其中包含所有不包含在 `numbersToRemove` 中的元素。最后,我们输出剩余的元素。
需要注意的是,这种方式并没有直接修改原始 `List` 对象,而是创建了一个新的 `List` 对象。如果你需要直接修改原始 `List` 对象,则可以使用 `RemoveAll` 方法,或者使用 `List` 类型的延迟删除。
相关问题
C#中 用socket实现多个个客户端的相互聊天功能
好的,下面是一个简单的 C# socket 多客户端聊天示例代码,其中使用了 TCP 协议。
服务端代码:
```csharp
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace SocketServer
{
class Program
{
static List<TcpClient> clientsList = new List<TcpClient>();
static void Main(string[] args)
{
IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, 1234);
TcpListener listener = new TcpListener(localEndPoint);
listener.Start();
Console.WriteLine("Server started, waiting for client to connect...");
while (true)
{
TcpClient client = listener.AcceptTcpClient();
Console.WriteLine("Client connected: " + client.Client.RemoteEndPoint.ToString());
clientsList.Add(client);
BroadcastMessage(client.Client.RemoteEndPoint.ToString() + " joined the chat");
NetworkStream stream = client.GetStream();
byte[] buffer = new byte[1024];
while (true)
{
int bytesRead = stream.Read(buffer, 0, buffer.Length);
string message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine("Received message: " + message);
if (message == "quit")
{
clientsList.Remove(client);
BroadcastMessage(client.Client.RemoteEndPoint.ToString() + " left the chat");
break;
}
BroadcastMessage(client.Client.RemoteEndPoint.ToString() + ": " + message);
}
stream.Close();
client.Close();
}
listener.Stop();
}
static void BroadcastMessage(string message)
{
byte[] buffer = Encoding.ASCII.GetBytes(message);
foreach (TcpClient client in clientsList)
{
NetworkStream stream = client.GetStream();
stream.Write(buffer, 0, buffer.Length);
}
}
}
}
```
客户端代码:
```csharp
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
namespace SocketClient
{
class Program
{
static void Main(string[] args)
{
IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 1234);
TcpClient client = new TcpClient();
client.Connect(remoteEndPoint);
Console.WriteLine("Connected to server: " + client.Client.RemoteEndPoint.ToString());
NetworkStream stream = client.GetStream();
byte[] buffer = new byte[1024];
Thread receiveThread = new Thread(new ThreadStart(() =>
{
while (true)
{
int bytesRead = stream.Read(buffer, 0, buffer.Length);
string message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine("Received message: " + message);
}
}));
receiveThread.Start();
while (true)
{
Console.Write("Enter your message: ");
string message = Console.ReadLine();
byte[] messageBuffer = Encoding.ASCII.GetBytes(message);
stream.Write(messageBuffer, 0, messageBuffer.Length);
if (message == "quit")
break;
}
stream.Close();
client.Close();
}
}
}
```
以上代码演示了一个简单的 TCP socket 多客户端聊天程序,服务端可以接受多个客户端连接,每个客户端之间可以相互发送消息,客户端程序可以通过控制台进行输入和输出。
c# socket服务器 封装类 多线程
以下是一个支持多线程的C# Socket服务器封装类的示例:
```csharp
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
public class SocketServer
{
private readonly List<Socket> _clients = new List<Socket>();
private readonly Socket _listener;
private readonly Thread _listenerThread;
public SocketServer(int port)
{
_listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_listener.Bind(new IPEndPoint(IPAddress.Any, port));
_listener.Listen(10);
_listenerThread = new Thread(ListenForClients);
_listenerThread.Start();
Console.WriteLine($"Server started on port {port}");
}
private void ListenForClients()
{
while (true)
{
var client = _listener.Accept();
_clients.Add(client);
Console.WriteLine($"Client connected: {client.RemoteEndPoint}");
var thread = new Thread(HandleClient);
thread.Start(client);
}
}
private void HandleClient(object clientObj)
{
var client = (Socket)clientObj;
var buffer = new byte[1024];
while (true)
{
try
{
var bytesRead = client.Receive(buffer);
if (bytesRead > 0)
{
var message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine($"Received message from {client.RemoteEndPoint}: {message}");
// Echo the message back to the client
var responseBuffer = Encoding.ASCII.GetBytes(message);
client.Send(responseBuffer);
}
else
{
Console.WriteLine($"Client disconnected: {client.RemoteEndPoint}");
_clients.Remove(client);
client.Close();
return;
}
}
catch (SocketException)
{
Console.WriteLine($"Client disconnected: {client.RemoteEndPoint}");
_clients.Remove(client);
client.Close();
return;
}
}
}
public void Close()
{
_listener.Close();
foreach (var client in _clients)
{
client.Shutdown(SocketShutdown.Both);
client.Close();
}
}
}
```
使用示例:
```csharp
var server = new SocketServer(1234);
Console.ReadLine();
server.Close();
```
这个封装类与之前的封装类非常相似,但它在接受客户端连接时创建了一个新的线程来处理每个客户端。这允许服务器同时处理多个客户端,而不必等待一个客户端的操作完成后才能处理另一个客户端。当客户端断开连接时,对应的线程也会退出。可以通过调用Close()方法来关闭服务器。