Mega Code Archive
RandomAccess file for storing the custom objects
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Imports System.IO
public class Test
public Shared Sub Main
Dim emp As New Employee
Dim file_num As Integer = FreeFile()
FileOpen(file_num, "MYFILE.DAT", OpenMode.Random, _
OpenAccess.ReadWrite, OpenShare.Shared, _
Len(emp))
FilePut(file_num, New Employee(1, "A", "A"))
FilePut(file_num, New Employee(2, "B", "B"))
FilePut(file_num, New Employee(3, "C", "C"))
Dim obj As ValueType = DirectCast(emp, ValueType)
For Each i As Integer In New Integer() {3, 1, 2}
FileGet(file_num, obj, i)
emp = DirectCast(obj, Employee)
Console.WriteLine(emp.ToString())
Next i
FileClose(file_num)
End Sub
End class
Public Structure Employee
Public ID As Integer
<VBFixedString(15)> Public FirstName As String
<VBFixedString(15)> Public LastName As String
Public Sub New(ByVal new_id As Integer, ByVal first_name As String, _
ByVal last_name As String)
ID = new_id
FirstName = first_name
LastName = last_name
End Sub
Public Overrides Function ToString() As String
Return ID & ": " & FirstName & " " & LastName
End Function
End Structure
3: C C
1: A A
2: B B
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