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REF CURSOR Parameters in an OracleDataReader

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This Visual Basic example executes a PL/SQL stored procedure that returns a REF CURSOR parameter and reads the value as an OracleDataReader.

Private Sub Button1_Click(ByVal sender As Object, _
  ByVal e As System.EventArgs) Handles Button1.Click

  Dim connString As New String("...")
  Using conn As New OracleConnection(connString)
    Dim cmd As New OracleCommand()
    Dim rdr As OracleDataReader

    conn.Open()
    cmd.Connection = conn
    cmd.CommandText = "CURSPKG.OPEN_ONE_CURSOR"
    cmd.CommandType = CommandType.StoredProcedure
    cmd.Parameters.Add(New OracleParameter(
      "N_EMPNO", OracleType.Number)).Value = 7369
    cmd.Parameters.Add(New OracleParameter(
      "IO_CURSOR", OracleType.Cursor)).Direction = ParameterDirection.Output

    rdr = cmd.ExecuteReader()
    While (rdr.Read())
        REM do something with the values
    End While

    rdr.Close()
  End Using
End Sub

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