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Devart.Data.Oracle Namespace / OracleArray Class
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    OracleArray Class
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    Represents a client-side cached Oracle collection (VARRAY).
    Syntax
    Remarks

    The OracleArray class provides methods to access elements of the collection. Items values are accessible by Item indexed property.

    The array elements can be added to the collection dynamically by calling Add, Insert methods or removed by calling Remove or RemoveAt but the maximum number of the elements cannot exceed Capacity specified at Oracle declaration of the VARRAY.

    Indexes in this collection are zero-based.

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

    Example

    This example demonstrates how to retrieve OracleArray 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 
      VARYING ARRAY(10000) OF VARCHAR2(40);
    
    CREATE TABLE CompanyEmpObject (
      Code NUMBER PRIMARY KEY,
      Company VARCHAR2(40),
      Employees TEmployees        
    );
    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'));
    

    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()) {
        OracleArray oraArray = dataReader.GetOracleArray(index);
        if (!oraArray.IsNull) {
          string[] employees = new string[oraArray.Count];
          for (int i = 0; i < oraArray.Count; i++)
            employees[i] = (string)oraArray[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();
    }
    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 oraArray As OracleArray = dataReader.GetOracleArray(index)
        If Not oraArray.IsNull Then
          Dim employees(oraArray.Count) As String
          Dim I As Integer
          For I = 0 To oraArray.Count - 1
            employees(I) = oraArray(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
    Inheritance Hierarchy

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

    Requirements

    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

    See Also