An OracleType class serves to retrieve metadata. Use OracleType object for getting description information about the type. You can get name of the type, attributes collection and description of the element of the collection by ItemObjectType property.

An OracleType does not have constructor and can be created only by calling static GetObjectType function.

This example demonstrates how to retrieve OracleType object from server and display its elements. To create required type and table and fill it with data you can use the following script:

CREATE TYPE TAddress AS OBJECT (
  Country VARCHAR2(30),
  City VARCHAR2(30),
  Street VARCHAR2(30),
  Apartment NUMBER
);

CREATE TABLE EmpObject (
  Code NUMBER PRIMARY KEY,
  Person VARCHAR2(40),
  Address TAddress,
  Job VARCHAR2(9)
);

INSERT INTO EmpObject
  (Code, Person, Address, Job)
VALUES
  (1, 'SMITH', TAddress('UK', 'London', 'Street', 12), 'CLERK');
INSERT INTO EmpObject
  (Code, Person, Address, Job)
VALUES
  (2, 'JONES', TAddress('USA', 'New York', 'Street', 418), 'MANAGER');
INSERT INTO EmpObject
  (Code, Person, Address, Job)
VALUES
  (3, 'SCOTT', TAddress('CANADA', 'Ottawa', 'Street', 26),'PRESIDENT');
INSERT INTO EmpObject
  (Code, Person, Address, Job)
VALUES
  (4, 'MARTIN', TAddress('FRANCE', 'Paris', 'Street', 162), 'ANALYST');

OracleConnection connection = new OracleConnection("User Id=scott;Password=tiger;Data Source=ora");
OracleCommand command = new OracleCommand("SELECT * FROM EmpObject", connection);
connection.Open();
OracleDataReader dataReader = command.ExecuteReader();
try{
  int index = dataReader.GetOrdinal("Address");
  while (dataReader.Read()) {
    OracleObject oraObj = dataReader.GetOracleObject(index);
    OracleType oraType = dataReader.GetObjectType(index);
    if (!oraObj.IsNull & oraType != null) {
      Console.WriteLine(dataReader.GetString(1) +" - " + dataReader.GetString(3));
      Console.WriteLine("Adress:");
      for (int i = 0; i < oraType.Attributes.Count; i++)
        Console.WriteLine( "\t" + oraObj[oraType.Attributes[i]]);
    }
  }
}
catch (Devart.Data.Oracle.OracleException ex) {
  Console.WriteLine(ex.Message);
}
finally{
  dataReader.Close();
  connection.Close();
}

Dim connection As New OracleConnection("User Id=scott;Password=tiger;Data Source=ora")
Dim command As New OracleCommand("SELECT * FROM EmpObject", connection)
connection.Open()
Dim dataReader As OracleDataReader = command.ExecuteReader()
Try
  Dim index As Integer = dataReader.GetOrdinal("Address")
  While dataReader.Read()
    Dim oraObj As OracleObject = dataReader.GetOracleObject(index)
    Dim oraType As OracleType = dataReader.GetObjectType(index)
    If Not oraObj.IsNull And Not oraType Is Nothing Then
      Console.WriteLine(dataReader.GetString(1) & " - " & dataReader.GetString(3))
      Console.WriteLine("Adress:")
      Dim I As Integer
      For I = 0 To oraType.Attributes.Count - 1
        Console.WriteLine(Chr(9) & oraObj(oraType.Attributes(I)))
      Next I
    End If
  End While
Catch ex As Devart.Data.Oracle.OracleException
  Console.WriteLine(ex.Message)
Finally
  dataReader.Close()
  connection.Close()
End Try

System.Object
   System.MarshalByRefObject
      Devart.Data.Oracle.OracleType

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

OracleType Members
Devart.Data.Oracle Namespace