using System;

using System.Configuration;

using MySql.Data.MySqlClient;

/// <summary>

/// TestDatebase 的摘要说明

/// </summary>

public class TestDatebase

{

    public TestDatebase()

    {

        //

        // TODO: 在此处添加构造函数逻辑

        //

    }

    public static void Main(String[] args)

    {

        MySqlConnection mysql = getMySqlCon();

        //查询sql

        String sqlSearch = "select * from student";

        //插入sql

        String sqlInsert = "insert into student values (12,'张三',25,'大专')";

        //修改sql

        String sqlUpdate = "update student set name='李四' where id= 3";

        //删除sql

        String sqlDel = "delete from student where id = 12";

        //打印SQL语句

        Console.WriteLine(sqlDel);

        //四种语句对象

        //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);

        //记得关闭

        mysql.Close();

       String readLine = Console.ReadLine();

    }

    /// <summary>

    /// 建立mysql数据库链接

    /// </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>

    /// 建立执行命令语句对象

    /// </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>

    /// 查询并获得结果集并遍历

    /// </summary>

    /// <param name="mySqlCommand"></param>

    public static void getResultset(MySqlCommand mySqlCommand)

    {

        MySqlDataReader reader = mySqlCommand.ExecuteReader();

        try

        {

            while (reader.Read())

            {

                if (reader.HasRows)

                {

                    Console.WriteLine("编号:" + reader.GetInt32(0) + "|姓名:" + reader.GetString(1) + "|年龄:" + reader.GetInt32(2) + "|学历:" + reader.GetString(3));

                }

            }

        }

        catch (Exception)

        {

            Console.WriteLine("查询失败了！");

        }

        finally

        {

            reader.Close();

        }

    }

    /// <summary>

    /// 添加数据

    /// </summary>

    /// <param name="mySqlCommand"></param>

    public static void getInsert(MySqlCommand mySqlCommand)

    {

        try

        {

            mySqlCommand.ExecuteNonQuery();

        }

        catch (Exception ex)

        {

            String message = ex.Message;

            Console.WriteLine("插入数据失败了！" + message);

        }

    }

    /// <summary>

    /// 修改数据

    /// </summary>

    /// <param name="mySqlCommand"></param>

    public static void getUpdate(MySqlCommand mySqlCommand)

    {

        try

        {

            mySqlCommand.ExecuteNonQuery();

        }

        catch (Exception ex)

        {

            String message = ex.Message;

            Console.WriteLine("修改数据失败了！" + message);

        }

    }

    /// <summary>

    /// 删除数据

    /// </summary>

    /// <param name="mySqlCommand"></param>

    public static void getDel(MySqlCommand mySqlCommand)

    {

        try

        {

            mySqlCommand.ExecuteNonQuery();

        }

        catch (Exception ex)

        {

            String message = ex.Message;

            Console.WriteLine("删除数据失败了！" + message);

        }

    }

}