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

Using the GmailDataAdapter

Use the adapter's Fill method to retrieve data from the data source. An empty DataTable instance is passed as an argument to the Fill method. When the method returns, the DataTable instance is populated with the queried data. Note that the GmailDataAdapter is slower than the GmailDataReader because the Fill method needs to retrieve all data from the data source before returning.

The following example selects the Id and MessageBody columns of the Inbox table:

C#

string connectionString = "user=myuseraccount;password=mypassword;";

using (GmailConnection connection = new GmailConnection(connectionString)) {
  GmailDataAdapter dataAdapter = new GmailDataAdapter(
  "SELECT Id, MessageBody FROM Inbox", connection);

  DataTable table = new DataTable();
  dataAdapter.Fill(table);

  Console.WriteLine("Contents of Inbox.");

  foreach (DataRow row in table.Rows) {
    Console.WriteLine("{0}: {1}", row["Id"], row["MessageBody"]);
  }
}

VB.NET

Dim connectionString As String = "user=myuseraccount;password=mypassword;"

Using connection As New GmailConnection(connectionString)
  Dim dataAdapter As New GmailDataAdapter("SELECT Id, MessageBody FROM Inbox", connection)

  Dim table As New DataTable()
  dataAdapter.Fill(table)

  Console.WriteLine("Contents of Inbox.")

  For Each row As DataRow In table.Rows
    Console.WriteLine("{0}: {1}", row("Id"), row("MessageBody"))
  Next
End Using