Code I

<MM:DataSet
 id="DataSet1"
 runat="Server"
 IsStoredProcedure="false"
 ConnectionString=
 '<%# System.Configuration.
 ConfigurationSettings.
 AppSettings
 ["Fake_ConnectionString"] %>'
 DatabaseType=
 '<%# System.Configuration.
 ConfigurationSettings.
 AppSettings
 ["MM_CONNECTION_
 DATABASETYPE_Northwind"] %>'
 CommandText='<%# "SELECT *
 FROM dbo.Categories" %>'
 Debug="true"
>
</MM:DataSet>

Code II

public string FieldValue( 
  string FieldName,
  System.Web.UI.Control Container 
)

public string FieldValueAtIndex( 
  int Index, 
  string FieldName,
  System.Web.UI.Control Container 
)