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

Using the ZohoCreatorDataAdapter

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

The following example selects the ID and Leave_Type columns of the Leave_Types table:

C#

string connectionString = "InitiateOAuth=GETANDREFRESH;";

using (ZohoCreatorConnection connection = new ZohoCreatorConnection(connectionString)) {
  ZohoCreatorDataAdapter dataAdapter = new ZohoCreatorDataAdapter(
  "SELECT ID, Leave_Type FROM [CData].[Employee Management].Leave_Types", connection);

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

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

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

VB.NET

Dim connectionString As String = "InitiateOAuth=GETANDREFRESH;"

Using connection As New ZohoCreatorConnection(connectionString)
  Dim dataAdapter As New ZohoCreatorDataAdapter("SELECT ID, Leave_Type FROM [CData].[Employee Management].Leave_Types", connection)

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

  Console.WriteLine("Contents of Leave_Types.")

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