SuperHack/SuperHack CD.bin/CODING/VBASIC/PHONE.ZIP/PHONE.TXT

Text File | 1996-07-18 | 4.2 KB | 271 lines

The phone book example was wrote in vb4 16bit

This code sets up a data file (redrum.dat) and shows how to create , remove
search ,etc..... for your records

      dIsClaImEr--- I am not resposible for anything blahblahblah


'create a module and name it
'The Module
Option Explicit

Type info

name As String * 20
number As String * 10

End Type







'THE form

Option Explicit

'declares the main variables

Dim A As info
Dim filenum As Integer
Dim recordlen As Long
Dim currentrecord As Long
Dim lastrecord As Long



Public Sub SaveCurrentRecord()
'fills a with the current info
 A.name = txtname
 A.number = txtnumber

'saves to the currentrecord

 Put #filenum, currentrecord, A



End Sub

Public Sub ShowCurrentrecord()

  Get #filenum, currentrecord, A

'display the data

  txtname = Trim(A.name)
  txtnumber = Trim(A.number)

End Sub



Private Sub cmdDel_Click()
'delete the record /.... i copy the redrum.dat except for the current record then delete the txt and restore causing a deleted record

Dim dirresult
Dim tmpfilenum
Dim tmpA As info
Dim recnum As Long
Dim tmprecnum As Long
'
'confirm the deletion
If MsgBox("Delete this name/number?", 4) <> 6 Then
 txtname.SetFocus
 Exit Sub
End If

If Dir("redrum.tmp") = "redrum.tmp" Then
 Kill "redrum.tmp"
End If
'
'
 tmpfilenum = FreeFile
 Open "redrum.tmp" For Random As tmpfilenum Len = recordlen
 recnum = 1
 tmprecnum = 1

Do While recnum < lastrecord + 1
 If recnum <> currentrecord Then

Get #filenum, recnum, tmpA
Put #tmpfilenum, tmprecnum, tmpA
tmprecnum = tmprecnum + 1
 End If

recnum = recnum + 1
Loop

'delete the original file
Close filenum
Kill "redrum.dat"

Close tmpfilenum
'rename the new file
Name "redrum.tmp" As "redrum.dat"
'reopen it
filenum = FreeFile
Open "redrum.dat" For Random As filenum Len = recordlen

lastrecord = lastrecord - 1

If lastrecord = 0 Then
 lastrecord = 1


 If currentrecord > lastrecord Then
 currentrecord = lastrecord
 End If
End If

ShowCurrentrecord

txtname.SetFocus


End Sub


Private Sub cmdExit_Click()
End

End Sub


Private Sub cmdNew_Click()
'saves the current info
 SaveCurrentRecord
'add a blank record
 lastrecord = lastrecord + 1
 A.name = ""
 A.number = ""

Put #filenum, lastrecord, A

currentrecord = lastrecord

ShowCurrentrecord

txtname.SetFocus





End Sub

Private Sub cmdNext_Click()

If currentrecord = lastrecord Then
 MsgBox "This is the last record in your list"
Else
 SaveCurrentRecord
 currentrecord = currentrecord + 1
 ShowCurrentrecord
End If

End Sub


Private Sub cmdPrev_Click()

If currentrecord = 1 Then
 MsgBox "This is the first record in your list"
Else
SaveCurrentRecord
currentrecord = currentrecord - 1
ShowCurrentrecord
End If

End Sub


Private Sub cmdSearch_Click()

Dim nametosearch As String
Dim found As Integer
Dim recnum As Long
Dim tmpA As info

'input box for the name to search for

nametosearch = InputBox("Name to search for?", "sEarcH eNgInE")

'if the user enters null exit sub'

If nametosearch = "" Then
 txtname.SetFocus
 Exit Sub
End If

'use th UCASE function to convert the letters to UPPERCASE
nametosearch = UCase(nametosearch)
'found flag = false

  found = False

'search for the name
For recnum = 1 To lastrecord
 Get #filenum, recnum, tmpA
    If nametosearch = UCase(Trim(tmpA.name)) Then
    found = True
    Exit For

  End If
Next

'display the name u searced for

If found = True Then
 SaveCurrentRecord
 currentrecord = recnum
 ShowCurrentrecord
Else
 MsgBox "" + nametosearch + "Not found"
End If

txtname.SetFocus



End Sub

Private Sub Form_Load()

'calculate the L.O.F
recordlen = Len(A)
'get the next file number
filenum = FreeFile
'open the file
Open "redrum.dat" For Random As filenum Len = recordlen
'updaate the record
currentrecord = 1
'find the last record
lastrecord = FileLen("redrum.dat") / recordlen

If lastrecord = 0 Then
lastrecord = 1
End If

'execute the ShowCurrentrecord procedure

ShowCurrentrecord



End Sub


Private Sub Form_Unload(Cancel As Integer)
Close filenum

End Sub