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

Using the InformixDataAdapter

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

The following example selects the Id and Author columns of the Books table:

C#

string connectionString = "Server=10.0.1.2;Port=50000;User=admin;Password=admin;Database=test";

using (InformixConnection connection = new InformixConnection(connectionString)) {
  InformixDataAdapter dataAdapter = new InformixDataAdapter(
  "SELECT Id, Author FROM [informix].Books", connection);

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

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

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

VB.NET

Dim connectionString As String = "Server=10.0.1.2;Port=50000;User=admin;Password=admin;Database=test"

Using connection As New InformixConnection(connectionString)
  Dim dataAdapter As New InformixDataAdapter("SELECT Id, Author FROM [informix].Books", connection)

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

  Console.WriteLine("Contents of Books.")

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