using System;
using System.Data.sqlite;

namespace sqliteSamples
{
    class Program
    {
        //数据库连接
        sqliteConnection m_dbConnection;

        static void Main(string[] args)
        {
            Program p = new Program();
        }

        public Program()
        {
            createNewDatabase();
            connectToDatabase();
            createTable();
            fillTable();
            printHighscores();
        }

        //创建一个空的数据库
        void createNewDatabase()
        {
            sqliteConnection.CreateFile("MyDatabase");

     //默认生成的数据库文件和System.Data.sqlite.dll在同一路径下

        }

        //创建一个连接到指定数据库
        void connectToDatabase()
        {
            m_dbConnection = new sqliteConnection("Data Source=MyDatabase;Version=3;");
            m_dbConnection.Open();
        }

        //在指定数据库中创建一个table
        void createTable()
        {
            string sql = "create table highscores (name varchar(20),score int)";
            sqliteCommand command = new sqliteCommand(sql,m_dbConnection);
            command.ExecuteNonQuery();
        }

        //插入一些数据
        void fillTable()
        {
            string sql = "insert into highscores (name,score) values ('Me',3000)";
            sqliteCommand command = new sqliteCommand(sql,m_dbConnection);
            command.ExecuteNonQuery();

            sql = "insert into highscores (name,score) values ('Myself',6000)";
            command = new sqliteCommand(sql,score) values ('And I',9001)";
            command = new sqliteCommand(sql,m_dbConnection);
            command.ExecuteNonQuery();
        }

        //使用SQL查询语句，并显示结果
        void printHighscores()
        {
            string sql = "select * from highscores order by score desc";
            sqliteCommand command = new sqliteCommand(sql,m_dbConnection);
            sqliteDataReader reader = command.ExecuteReader();
            while (reader.Read())
                Console.WriteLine("Name: " + reader["name"] + "\tscore: " + reader["score"]);
            Console.ReadLine();
        }
    }
}