Imports System.IO
Imports System.Collections
Imports System.Windows.Forms
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Runtime.Serialization
Public Class MainClass
Public Shared Sub Main()
Const NUMBER_OF_RECORDS As Integer = 100
' record for writing to disk
Dim blankRecord As Employee = New Employee("f","l")
Dim fileOutput As FileStream
Dim binaryOutput As BinaryWriter
Dim fileName As String = "test.dat"
Dim i As Integer
Try
fileOutput = New FileStream(fileName,FileMode.Create, FileAccess.Write)
fileOutput.SetLength(Employee.SIZE * NUMBER_OF_RECORDS)
binaryOutput = New BinaryWriter(fileOutput)
For i = 0 To NUMBER_OF_RECORDS - 1
fileOutput.Position = i * Employee.SIZE
binaryOutput.Write(blankRecord.firstName)
binaryOutput.Write(blankRecord.lastName)
Next
Console.WriteLine("File Created")
Catch fileException As IOException
Console.WriteLine("Cannot write to file")
End Try
' close FileStream
If (fileOutput Is Nothing) <> False Then
fileOutput.Close()
End If
' close BinaryWriter
If (binaryOutput Is Nothing) <> False Then
binaryOutput.Close()
End If
End Sub
End Class
Public Class Employee
Public firstName, lastName As String
Shared Public SIZE As Integer = 200
Public Sub New(ByVal first As String, ByVal last As String)
firstName = first
lastName = last
End Sub
Public Overrides Function ToString() As String
Return firstName & " " & lastName
End Function
End Class