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

Using the xBaseDataAdapter

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

The following example selects the ShipName and ShipCity columns of the Orders table:

C#

string connectionString = "Data Source=C:\\MyData;";

using (xBaseConnection connection = new xBaseConnection(connectionString)) {
  xBaseDataAdapter dataAdapter = new xBaseDataAdapter(
  "SELECT ShipName, ShipCity FROM Orders", connection);

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

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

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

VB.NET

Dim connectionString As String = "Data Source=C:\\MyData;"

Using connection As New xBaseConnection(connectionString)
  Dim dataAdapter As New xBaseDataAdapter("SELECT ShipName, ShipCity FROM Orders", connection)

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

  Console.WriteLine("Contents of Orders.")

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