c，#include，#include，#include，#include，#include，#include，，int main() {， int server_fd, new_socket;， struct sockaddr_in address;， int opt = 1;， int addrlen = sizeof(address);， char buffer[1024] = {0};， const char *hello = "Hello from server";，， if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {， perror("socket failed");， exit(EXIT_FAILURE);， }，， if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {， perror("setsockopt");， exit(EXIT_FAILURE);， }，， address.sin_family = AF_INET;， address.sin_addr.s_addr = INADDR_ANY;， address.sin_port = htons(8080);，， if (bind(server_fd, (struct sockaddr *)&address, sizeof(address))< 0) {， perror("bind failed");， exit(EXIT_FAILURE);， }，， if (listen(server_fd, 3)< 0) {， perror("listen");， exit(EXIT_FAILURE);， }，， if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen))< 0) {， perror("accept");， exit(EXIT_FAILURE);， }，， read(new_socket, buffer, 1024);， printf("Message received: %s，", buffer);， send(new_socket, hello, strlen(hello), 0);， printf("Hello message sent，");，， close(new_socket);， close(server_fd);， return 0;，}，``www.example.com/page.aspx?id=123。csharp，using System;，using System.Web.UI;，using System.Data.SqlClient;，，public partial class Register : Page，{， protected void btnRegister_Click(object sender, EventArgs e)， {， string username = txtUsername.Text;， string password = txtPassword.Text;， string email = txtEmail.Text;，， if (IsValidInput(username, password, email))， {， string connectionString = "your_connection_string";， using (SqlConnection con = new SqlConnection(connectionString))， {， string query = "INSERT INTO Users (Username, Password, Email) VALUES (@Username, @Password, @Email)";， using (SqlCommand cmd = new SqlCommand(query, con))， {， cmd.Parameters.AddWithValue("@Username", username);， cmd.Parameters.AddWithValue("@Password", password);， cmd.Parameters.AddWithValue("@Email", email);，， con.Open();， cmd.ExecuteNonQuery();， lblMessage.Text = "Registration successful!";， }， }， }， else， {， lblMessage.Text = "Invalid input. Please try again.";， }， }，， private bool IsValidInput(string username, string password, string email)， {， // Add your validation logic here， return !string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(password) && !string.IsNullOrEmpty(email);， }，}，`，，请确保替换 "your_connection_string"` 为实际的数据库连接字符串，并根据需要调整表名和字段名。Powered By Z-BlogPHP 1.7.3
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