using System;
using System.Configuration;
using MySql.Data.MySqlClient;
/// <summary>
/// TestDatebase 的摘要說明
/// </summary>
public class TestDatebase
{
    public TestDatebase()
    {
        //
        // TODO: 在此處添加構造函數邏輯
        //
    }
    public static void Main(String[] args)
    {
        MySqlConnection mysql = getMySqlCon();
        //查詢sql
        String sqlSearch = "select * from student";
        //插入sql
        String sqlInsert = "insert into student values (12,'張三',25,'大專')";
        //修改sql
        String sqlUpdate = "update student set name='李四' where id= 3";
        //刪除sql
        String sqlDel = "delete from student where id = 12";
        //打印SQL語句
        Console.WriteLine(sqlDel);
        //四種語句對象
        //MySqlCommand mySqlCommand = getSqlCommand(sqlSearch, mysql);
        //MySqlCommand mySqlCommand = getSqlCommand(sqlInsert, mysql);
        //MySqlCommand mySqlCommand = getSqlCommand(sqlUpdate, mysql);
        MySqlCommand mySqlCommand = getSqlCommand(sqlDel, mysql);
        mysql.Open();
        //getResultset(mySqlCommand);
        //getInsert(mySqlCommand);
        //getUpdate(mySqlCommand);
        getDel(mySqlCommand);
        //記得關閉
        mysql.Close();
       String readLine = Console.ReadLine();
    }
    /// <summary>
    /// 建立mysql數據庫鏈接
    /// </summary>
    /// <returns></returns>
    public static MySqlConnection getMySqlCon()
    {
        String mysqlStr = "Database=test;Data Source=127.0.0.1;User Id=root;Password=root;pooling=false;CharSet=utf8;port=3306";
        // String mySqlCon = ConfigurationManager.ConnectionStrings["MySqlCon"].ConnectionString;
        MySqlConnection mysql = new MySqlConnection(mysqlStr);
        return mysql;
    }
    /// <summary>
    /// 建立執行命令語句對象
    /// </summary>
    /// <param name="sql"></param>
    /// <param name="mysql"></param>
    /// <returns></returns>
    public static MySqlCommand getSqlCommand(String sql,MySqlConnection mysql)
    {
        MySqlCommand mySqlCommand = new MySqlCommand(sql, mysql);
        //  MySqlCommand mySqlCommand = new MySqlCommand(sql);
        // mySqlCommand.Connection = mysql;
        return mySqlCommand;
    }
    /// <summary>
    /// 查詢并獲得結果集并遍歷
    /// </summary>
    /// <param name="mySqlCommand"></param>
    public static void getResultset(MySqlCommand mySqlCommand)
    {
        MySqlDataReader reader = mySqlCommand.ExecuteReader();
        try
        {
            while (reader.Read())
            {
                if (reader.HasRows)
                {
                    Console.WriteLine("編號:" + reader.GetInt32(0) + "|姓名:" + reader.GetString(1) + "|年齡:" + reader.GetInt32(2) + "|學歷:" + reader.GetString(3));
                }
            }
        }
        catch (Exception)
        {

            Console.WriteLine("查詢失敗了！");
        }
        finally
        {
            reader.Close();
        }
    }
    /// <summary>
    /// 添加數據
    /// </summary>
    /// <param name="mySqlCommand"></param>
    public static void getInsert(MySqlCommand mySqlCommand)
    {
        try
        {
            mySqlCommand.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            String message = ex.Message;
            Console.WriteLine("插入數據失敗了！" + message);
        }

    }
    /// <summary>
    /// 修改數據
    /// </summary>
    /// <param name="mySqlCommand"></param>
    public static void getUpdate(MySqlCommand mySqlCommand)
    {
        try
        {
            mySqlCommand.ExecuteNonQuery();
        }
        catch (Exception ex)
        {

            String message = ex.Message;
            Console.WriteLine("修改數據失敗了！" + message);
        }
    }
    /// <summary>
    /// 刪除數據
    /// </summary>
    /// <param name="mySqlCommand"></param>
    public static void getDel(MySqlCommand mySqlCommand)
    {
        try
        {
            mySqlCommand.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            String message = ex.Message;
            Console.WriteLine("刪除數據失敗了！" + message);
        }
    }
}