OracleTable Class

Represents a client-side cached Oracle Nested table type.

For a list of all members of this type, see OracleTable members.

Inheritance Hierarchy

System.Object
Devart.Data.Oracle.OracleArray
Devart.Data.Oracle.OracleTable

Syntax

[Visual Basic]
Public Class OracleTable 
   Inherits OracleArray
   Implements ICustomOracleArray, IOracleArray, IOracleObjectBase, ICollection, IEnumerable, IList, IListSource, INullable, ICloneable

[C#]
public class OracleTable : OracleArray, ICustomOracleArray, IOracleArray, IOracleObjectBase, ICollection, IEnumerable, IList, IListSource, INullable, ICloneable

Remarks

The behavior of the OracleTable is similar to OracleArray class. The main difference is that OracleTable can contain unlimited number of the elements.

Note that OracleTable can be used in data binding with DataGrid as it implements IListSource interface.

This class is not available in OracleConnection.Direct mode.

Example

This example demonstrates how to retrieve OracleTable 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 OR REPLACE TYPE TEmployees AS 
  TABLE OF VARCHAR2(40);

CREATE TABLE CompanyEmpObject (
  Code NUMBER PRIMARY KEY,
  Company VARCHAR2(40),
  Employees TEmployees	
)NESTED TABLE Employees STORE AS N_TAB;

INSERT INTO CompanyEmpObject
  (Code, Company, Employees)
VALUES
  (1, 'Microsoft', TEmployees('PROGRAMMER', 'MANAGER', 'ELECTRICIAN', 'CLEANUP MEN'));
INSERT INTO CompanyEmpObject
  (Code, Company, Employees)
VALUES
  (2, 'Borland', TEmployees('PROGRAMMER', 'ELECTRICIAN', 'COURIER'));
INSERT INTO CompanyEmpObject
  (Code, Company, Employees)
VALUES
  (3, 'MC Donalds', TEmployees('SHOP ASSISTANT', 'CLERK',  'CLEANUP MEN'));
INSERT INTO CompanyEmpObject
  (Code, Company, Employees)
VALUES
  (4, 'Ford', TEmployees('MECHANICIAN', 'MANAGER'));

[C#]

OracleConnection connection = new OracleConnection("User Id=scott;Password=tiger;Data Source=ora"); 
OracleCommand command = new OracleCommand("SELECT * FROM CompanyEmpObject", connection); 
connection.Open(); 
OracleDataReader dataReader = command.ExecuteReader(); 
try{ 
  int index = dataReader.GetOrdinal("Employees"); 
  while (dataReader.Read()) { 
    OracleTable oraTable = dataReader.GetOracleTable(index); 
    if (!oraTable.IsNull) { 
      string[] employees = new string[oraTable.Count]; 
      for (int i = 0; i < oraTable.Count; i++) 
        employees[i] = (string)oraTable[i]; 
 
      Console.WriteLine("Company: " + dataReader.GetString(1)); 
      foreach (string str in employees) 
        Console.WriteLine("\t" + str); 
    } 
    else{ 
      Console.WriteLine("Company: " + dataReader.GetString(1)); 
      Console.WriteLine("No vacancies"); 
    } 
  } 
} 
catch (Devart.Data.Oracle.OracleException ex) { 
  Console.WriteLine(ex.Message); 
} 
finally{ 
  dataReader.Close(); 
  connection.Close(); 
} 
Console.ReadLine();

[Visual Basic]

Dim connection As New OracleConnection("User Id=scott;Password=tiger;Data Source=ora")
 Dim command As New OracleCommand("SELECT * FROM CompanyEmpObject", connection)
 connection.Open()
 Dim dataReader As OracleDataReader = command.ExecuteReader()
 Try
   Dim index As Integer = dataReader.GetOrdinal("Employees")
   While dataReader.Read()
     Dim oraTable As OracleTable = dataReader.GetOracleTable(index)
     If Not oraTable.IsNull Then
       Dim employees(oraTable.Count) As String
       Dim I As Integer
       For I = 0 To oraTable.Count - 1
         employees(I) = oraTable(I)
       Next I
       Console.WriteLine("Company: " & dataReader.GetString(1))
       For Each str As String In employees
         Console.WriteLine(Chr(9) & str)
       Next
     Else
       Console.WriteLine("Company: " & dataReader.GetString(1))
       Console.WriteLine("No vacancies")
     End If
   End While
 Catch ex As Devart.Data.Oracle.OracleException
   Console.WriteLine(ex.Message)
 Finally
   dataReader.Close()
   connection.Close()
 End Try

See Also

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