c#怎么连接云服务器数据库

using System;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        // 数据库连接字符串
        string connectionString = "Server=tcp:your_server_address,1433;Initial Catalog=your_database_name;User ID=your_username;Password=your_password;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;";

        // 创建连接
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            try
            {
                // 打开连接
                connection.Open();
                Console.WriteLine("连接成功！");

                // 执行查询
                string query = "SELECT * FROM your_table_name";
                using (SqlCommand command = new SqlCommand(query, connection))
                {
                    using (SqlDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            Console.WriteLine(reader["column_name"].ToString());
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("连接失败: " + ex.Message);
            }
        }
    }
}