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);
    }
  }
}