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

Using the SuadeoDataReader

The SuadeoDataReader retrieves data faster than the SuadeoDataAdapter because it can retrieve data in pages. As you read data from the SuadeoDataReader, 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 Customers table:

C#

string connectionString = "User=myusername;Password=mypassword;AuthenticationName=Production;";

using (SuadeoConnection connection = new SuadeoConnection(connectionString)) {
  SuadeoCommand cmd = new SuadeoCommand("SELECT * FROM Customers", connection);
  
  SuadeoDataReader rdr = cmd.ExecuteReader();

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

VB.NET

Dim connectionString As String = "User=myusername;Password=mypassword;AuthenticationName=Production;"

Using connection As New SuadeoConnection(connectionString)
  Dim cmd As New SuadeoCommand("SELECT * FROM Customers", connection)

  Dim rdr As SuadeoDataReader = cmd.ExecuteReader()

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