C# を使用して MySQL にストアド プロシージャを作成する方法

CREATE TABLE users (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(50) NOT NULL,
  age INT
);

using MySql.Data.MySqlClient;
using System;
using System.Data;

namespace MysqlStoredProcedure
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Server=localhost;Database=testdb;Uid=root;Pwd=123456;";
            
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // 创建存储过程
                string createProcedureSql = "CREATE PROCEDURE GetAllUsers() " +
                                            "BEGIN " +
                                            "    SELECT * FROM users; " +
                                            "END";
                MySqlCommand createProcedureCommand = new MySqlCommand(createProcedureSql, connection);
                createProcedureCommand.ExecuteNonQuery();

                // 调用存储过程
                string callProcedureSql = "CALL GetAllUsers()";
                MySqlCommand callProcedureCommand = new MySqlCommand(callProcedureSql, connection);

                using (MySqlDataReader reader = callProcedureCommand.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        Console.WriteLine("ID: {0}, Name: {1}, Age: {2}",
                            reader.GetInt32(0),
                            reader.GetString(1),
                            reader.GetInt32(2));
                    }
                }
            }
        }
    }
}