using MySql.Data.MySqlClient;//添加引用同时添加命令空间
class MyDb_mysql { MySqlConnection mycon = null;//mysql连接对象 public MyDb_mysql() { } public MyDb_mysql(string host,string user,string pwd,string database) { string constr = string.Format("server={0};User Id={1};password={2};database={3};charset=utf8;",host,user,pwd,database);//charset=utf8;解决中文乱码问题 mycon = new MySqlConnection(constr); mycon.Open(); } /// <summary> /// 查询数据 /// </summary> /// <param name="sql"></param> /// <returns></returns> public DataTable Select(string sql) { try { MySqlCommand mycmd = new MySqlCommand(sql, mycon); MySqlDataAdapter da = new MySqlDataAdapter(mycmd); DataTable dt = new DataTable(); da.Fill(dt); return dt; } catch (Exception) { return null; } } /// <summary> /// 更新数据 /// </summary> /// <param name="sql"></param> /// <returns></returns> public int IDP(string sql) { try { MySqlCommand mycmd = new MySqlCommand(sql, mycon); return mycmd.ExecuteNonQuery(); } catch(Exception) { return 0; } } /// <summary> /// 关闭连接 /// </summary> public void Colse() { if (mycon != null) { mycon.Close(); } } }