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

Using the ExactOnlineDataAdapter

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 ExactOnlineDataAdapter is slower than the ExactOnlineDataReader because the Fill method needs to retrieve all data from the data source before returning.

The following example selects the Id and Name columns of the Accounts table:

C#

string connectionString = "InitiateOAuth=GETANDREFRESH;Region='United States';Division=5512;";

using (ExactOnlineConnection connection = new ExactOnlineConnection(connectionString)) {
  ExactOnlineDataAdapter dataAdapter = new ExactOnlineDataAdapter(
  "SELECT Id, Name FROM Accounts", connection);

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

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

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

VB.NET

Dim connectionString As String = "InitiateOAuth=GETANDREFRESH;Region='United States';Division=5512;"

Using connection As New ExactOnlineConnection(connectionString)
  Dim dataAdapter As New ExactOnlineDataAdapter("SELECT Id, Name FROM Accounts", connection)

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

  Console.WriteLine("Contents of Accounts.")

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