The CData ADO.NET Provider for MySQL implements two ADO.NET interfaces you can use to retrieve data from MySQL: MySQLDataAdapter and MySQLDataReader objects. Whereas MySQLDataAdapter objects retrieve a single result set of all the data that matches a query, MySQLDataReader objects fetch data in subset increments as needed.

Using the MySQLDataReader

The MySQLDataReader retrieves data faster than the MySQLDataAdapter because it can retrieve data in pages. As you read data from the MySQLDataReader, it periodically requests the next page of results from the data source, if required. This causes results to be returned at a faster rate. The following example selects all the columns from the `sakila`.Orders table:

C#

string connectionString = "User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;";

using (MySQLConnection connection = new MySQLConnection(connectionString)) {
  MySQLCommand cmd = new MySQLCommand("SELECT * FROM `sakila`.Orders", connection);
  
  MySQLDataReader rdr = cmd.ExecuteReader();

  while (rdr.Read()) {
    Console.WriteLine(String.Format("\t{0} --> \t\t{1}", rdr["ShipName"], rdr["ShipCity"]));
  }
}

VB.NET

Dim connectionString As String = "User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;"

Using connection As New MySQLConnection(connectionString)
  Dim cmd As New MySQLCommand("SELECT * FROM `sakila`.Orders", connection)

  Dim rdr As MySQLDataReader = cmd.ExecuteReader()

  While rdr.Read()
    Console.WriteLine([String].Format(vbTab & "{0} --> " & vbTab & vbTab & "{1}", rdr("ShipName"), rdr("ShipCity")))
  End While
End Using