无法获取参数以在C#中使用OdbcConnection

using System;
using System.Data.Odbc;

class Program
{
    static void Main()
    {
        string connectionString = "your_connection_string";
        string sql = "SELECT * FROM your_table WHERE column_name = ?";

        using (OdbcConnection connection = new OdbcConnection(connectionString))
        {
            connection.Open();

            using (OdbcCommand command = new OdbcCommand(sql, connection))
            {
                // 创建参数对象
                OdbcParameter parameter = new OdbcParameter();
                parameter.ParameterName = "@paramName";
                parameter.Value = "paramValue";

                // 将参数添加到命令对象中
                command.Parameters.Add(parameter);

                // 执行查询
                using (OdbcDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        // 处理查询结果
                    }
                }
            }
        }
    }
}