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

Using the GoogleCalendarDataReader

The GoogleCalendarDataReader retrieves data faster than the GoogleCalendarDataAdapter because it can retrieve data in pages. As you read data from the GoogleCalendarDataReader, 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 MyCalendar table:

C#

string connectionString = "InitiateOAuth=GETANDREFRESH;";

using (GoogleCalendarConnection connection = new GoogleCalendarConnection(connectionString)) {
  GoogleCalendarCommand cmd = new GoogleCalendarCommand("SELECT * FROM MyCalendar", connection);
  
  GoogleCalendarDataReader rdr = cmd.ExecuteReader();

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

VB.NET

Dim connectionString As String = "InitiateOAuth=GETANDREFRESH;"

Using connection As New GoogleCalendarConnection(connectionString)
  Dim cmd As New GoogleCalendarCommand("SELECT * FROM MyCalendar", connection)

  Dim rdr As GoogleCalendarDataReader = cmd.ExecuteReader()

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