csharp D B

Posted 2021-05-12

  using System.Data.OleDb;
  public static void ReadFromAccess()
  {
    int param1Index;
    string param1;
    OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=[filelocation]");
    OleDbCommand cmd = conn.CreateCommand();
    cmd.CommandText = "SELECT * FROM MachineList";
    conn.Open();
    OleDbDataReader dr = cmd.ExecuteReader();
    DataTable dt = new System.Data.DataTable();
    while (dr.Read())
    {
      param1Index=dr.GetOrdinal("[param1]");
      param1 = dr.GetString(param1Index);
    }
    conn.Close();
  }
  

String mysqlStr = "Database=automachine;Data Source=127.0.0.1;User Id=root;Password=Demo123;pooling=false;CharSet=utf8;port=3306";
MySqlConnection mysql = new MySqlConnection(mysqlStr);
mysql.Open();
String sqlUpdate = "UPDATE automachine.t_deviceinfo SET param1='1' WHERE param2= 'hello'";
MySqlCommand mySqlCommand = new MySqlCommand(sqlUpdate, mysql);
getUpdate(mySqlCommand);
mysql.Close();