library management system project code in visual basic

7/27/2019 library management system project code in visual basic

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Submitted To: Submitted By:


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IndexS No. Topics Page

1 Acknowledgment 3

2 Tools/ Platform/ Language used &

Hardware And Software

Requirements

4

3 Project coding 5

4 Forms 19

5 Reports

6 Bibliography 27


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Acknowledgement

We wish to take this opportunity to express our deepest

and immense thanks to all of the people who contributed to

this project and helped us at every step and provided us with

their valuable guidance.

We want to place to record our sincere gratitude to our

project guide Miss Parmjit Kaur, who has made us abstain

from being hackneyed by showing us a new way and whole

new dimensions in the analysis of our project Welcome to

Punjab Pivot of rich culture and heritage.

We are much obliged to our Centre head Smt.

Simran Bagga for liberally offering the facility to complete

our project. We would like to take this chance to express our

heartful gratitude to Mr. Hardeep Singhwhose initiative and

selfness helped in accomplishing this great task.


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Tools/ Platforms/ Languages used &

Hardware And Software Requirements

Platform:

Platform which is so popular now a days i.e. Microsoft

Windows, is used to develop this project.

Tools:

1. Visual Basic 6.0

2. Microsoft Access XP

3. Microsoft Access

Hardware Requirements:

1. Minimum 32 MB RAM (64 MB Recommended)

2. Minimum 20 KB Free Space on HDD

3.Minimum 450 MHz Processor

Software Requirement:

1. Windows Operating System 98/2000/XP

2. Visual Basic 6.0

3. Microsoft Access


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INTRODUCTION TO VISUAL BASIC


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Visual basic is very powerful and popular front-end-programming tool. Its latest versions

have excellent features for working with the interest. It is also almost completely

customizable through its new extensibility model. Accordingly, it has been include into

curriculum of the course module on Post Graduation Diploma in Computer Application.

The aim is to train the student or any working professional to write simple application

program to meet the requirements of his organization or business.

This course material deals with visual basic in a very systematic manner. As

we proceed further the various features involved in the programming of visual basic are

discussed in detail. It guide the retrieving properties and in using the various controls in

an efficient manner. Also new version (7.0) of visual basic is more compatible and

customized through its new extensibility model.

The most important part that leads to an approach for connecting Visual Basic to the

backend is data objects such as ADO, RDO and DAO. The active x data object to use this

technique of database connectivity. Using active x programming a student gets exposed to

one of the best approach to ward database programming.

Microsoft Visual Basic Environment is fully integrated and supports the fully

development life cycle. Visual Basic fully phase of the windows software Development life

cycle, i.e. design, development and deployment visual basic provides you with a complete

set of tools to simply rapid application development (RAD).

Visual Basic has evolved from the original BASIC language, which is very widely used

language. This is graphical user interface (GUI) based language, supports to windows

programming. Existing objects are dragged and dropped into places instead of writing

numerous lines of code.

Visual Basic is a number of Microsoft Visual Studio, which is fully integrated suit

of Visual tools that all have the same look and feel.

THE PROJECT EXPLORER WINDOW

The following section describes the different types of files and objects that you include in a

project:-


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Form Module

Form module (.frm file extension) can contain textual descriptions of the form and its

controls, including their properties settings. They can also contain form level declarations

of constants, variables, and external procedures; event procedures; and general procedures.

Class Module

Class Module(.cls file name extension) are similar to form modules, except that they

have no visible user interface. You can use class modules to create your own object,

including code for methods and properties.

Standard Modules

Standard modules (.bas file name extension) can contain public or modeled-level

declaration of types, constants, variables, external procedures, and public procedures.

Components

In addition to file modules, several other types of components can be added to the

project.

ActiveX controls

ActiveX controls (.ocr file name extension) are optional controls, which can be

added to the toolbox and used on the forms. When you install Visual Basic, the

control including with Visual Basic, the file included with Visual Basic are copied

to a common directory (windows\system subdirectory under window 95/98).

Additional activeX controls are available from a wide variety of sources. You can

also create your controls using the professional or enterprises edition of Visual

Basic.

STRUCTURE OF A VB PROJECT

The project file is simply a list of all the objects associated with the project, as well as

information on the environment options you set. This information is updated every time

you save the project. All of the files and objects can be shared by other project as well.


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When you have completed all the files for a project, you can convert the project into an

executable file (.exe): From the file menu, choose the

Make project.exe command. Each time you save a project, visual basic updates the project

file (.vbp). A project file contains the same list of files that appears in the project explorer.

Window, you can open an existing project file by double-clicking its icon, by choosing the

open project command from the menu, or by dragging the file and dropping it on the

explorer window. Project consists of

One project file that keeps track of all the components (.vbp)

One file for each form (.frm)

Optionally, one file for each class module (.cls).

Optionally, one file for each standard module (.bas)

Optionally, one or more files containing ActiveX controls (.ocx)

As you create, add, or remove editable files from a project, Visual Basic reflects your

changes in the project explorer window, which contains a current list of the files in the

project.

Project CodingMDI Form


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Private Declare Function InitCommonControls Lib "comctl32.dll" () As Long

Private Sub MDIForm_Load()

Me.Show

Set CN = New ADODB.Connection

CN.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path &

"\MasterFile.mdb;Persist Security Info=False;"

If CN.State adStateOpen Then MsgBox "Could not establish a connection

with the database" & vbNewLine & "The database should exist in

ApplicationPath\MasterFile.mdb", vbExclamation, "Database not found!": Unload

Me

frmReturn.FineAmnt = CCur(GetSetting(App.Title, "Settings", "Fine Amount",

"2"))frmReturn.MaxDays = CInt(GetSetting(App.Title, "Settings", "Max Days",

"14"))

End Sub

Private Sub MDIForm_Unload(Cancel As Integer)

Dim Form As Form

For Each Form In Forms

Unload Form

Set Form = Nothing

Next Form

Set CN = Nothing

End Sub

Private Sub MDIForm_Initialize()


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InitCommonControls

End Sub

'---------------------------------------------------------------------

'======================= Menu Coding

==========================

'== Provides connectivity to other parts of the program to the user ==

'---------------------------------------------------------------------

Private Sub mnuAbout_Click()

frmAbout.Show vbModal

End Sub

Private Sub mnuArrangeIcons_Click()

frmMain.Arrange vbArrangeIcons

End Sub

Private Sub mnuBookRec_Click()

With frmBooks

.Show

.SetFocus

End With

End Sub


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Private Sub mnuBookRep_Click()

Dim RS As New ADODB.RecordSet

RS.Open "SELECT * FROM tblBooks Order by [Book ID]", CN, adOpenStatic,

adLockReadOnly

Set drBookList.DataSource = RS

drBookList.Show

Set RS = Nothing

End Sub

Private Sub mnuCascade_Click()

frmMain.Arrange vbCascade

End Sub

Private Sub mnuIssue_Click()

frmIssue.Show vbModal

End Sub

Private Sub mnuMembers_Click()

With frmMembers

.Show

.SetFocus

End With


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End Sub

Private Sub mnuReport_Click()


RS.Open "SELECT * FROM tblMembers Order by [Student ID]", CN,

adOpenStatic, adLockReadOnly

Set drMembers.DataSource = RS

drMembers.Show

Set RS = Nothing

End Sub

Private Sub mnuReturn_Click()

frmReturn.Show vbModal

End Sub

Private Sub mnuSettings_Click()

frmSettings.Show vbModal

End Sub

Private Sub mnuTileHorizontal_Click()

frmMain.Arrange vbTileHorizontal


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End Sub

Private Sub mnuTileVertical_Click()

frmMain.Arrange vbTileVertical

End Sub

Private Sub mnuExit_Click()

Unload Me

End Sub

Private Sub mnuUnreturnedBooks_Click()


RS.Open "SELECT tblTrans.[Book ID], tblTrans.[Student ID], tblBooks.Title,

[First Name] & ' ' & [Middle Initial] & ' ' & [Last Name] AS Borrower, tblTrans.

[Date Borrowed] FROM tblMembers INNER JOIN (tblBooks INNER JOIN

tblTrans ON tblBooks.[Book ID] = tblTrans.[Book ID]) ON tblMembers.[Student

ID] = tblTrans.[Student ID] Where (((tblTrans.Returned) = False)) ORDER BY

tblTrans.[Book ID];", CN, adOpenStatic, adLockReadOnly

Set drTransUn.DataSource = RS

drTransUn.Show

Set RS = Nothing

End Sub


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Private Sub Toolbar1_ButtonClick(ByVal Button As MSComctlLib.Button)

Select Case Button.Index

Case 1: mnuIssue_Click

Case 2: mnuReturn_Click

Case 4: mnuBookRec_Click

Case 5: mnuMembers_Click

Case 6: PopupMenu mnuReports, , Toolbar1.Buttons(6).Left, Toolbar1.Top +

Toolbar1.Height

Case 8: mnuSettings_Click

Case 9: mnuAbout_ClickEnd Select

End Sub

Add Student Form

Option Explicit

Private RS As ADODB.RecordSet

Private Sub cmdOperations_Click(Index As Integer)

'Shows the Search/Sort/Filter form by creating a new instance and destroying it once done

Dim obj As Form

If Index = 0 Then Set obj = frmSearch

If Index = 1 Then Set obj = frmFilter

If Index = 2 Then Set obj = frmSort

With obj

Set .SourceRs = RS


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.Show vbModal

End With

Set obj = Nothing

End Sub

Private Sub cmdReport_Click(Index As Integer)

'Creates dynamic reports

If Index = 0 Then cmdRefresh_Click


drMembers.Show

End Sub

Private Sub cmdRetrive_Click()

'Retrives a picture to be shown in the Photo box with the use of Photo Access User Control

Dim tmpRS As New ADODB.RecordSet

With tmpRS

.Open "SELECT [Picture] FROM tblMembers WHERE [Student ID]='" &

txtDisp(0).Text & "'", CN, adOpenForwardOnly, adLockOptimistic

If Len(RS!Picture) > 0 Then

picBox.LoadPhoto RS!Picture

Else

Set picBox.Picture = LoadPicture()

End If

.Close

End With

Set tmpRS = Nothing

End Sub


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Private Sub Form_Load()

'Loads a form and initializes all variables

On Error GoTo hell

Set RS = New ADODB.RecordSet

RS.CursorLocation = adUseClient

RS.Open "SELECT * FROM tblMembers", CN, adOpenDynamic, adLockOptimistic

Set DataGrid1.DataSource = RS

DisplayRecords

With frmMain.ImgList32

cmdReport(0).Picture = .ListImages(6).Picture


End With

Exit Sub

hell:

Handler Err

Resume Next

End Sub

Private Sub Form_Resize()

'Resizes a form according to the screen size, resolution or form resize

On Error Resume Next

SSTab1.Height = Me.Height - 2500

SSTab1.Width = Me.Width - 400

Line1.X1 = SSTab1.Left

Line1.X2 = SSTab1.Left + SSTab1.Width

Line1.Y1 = SSTab1.Top + SSTab1.Height + 400

Line1.Y2 = Line1.Y1


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DataGrid1.Width = SSTab1.Width - 280

DataGrid1.Height = SSTab1.Height - 580

Frame1.Height = DataGrid1.Height - 100

Frame1.Width = DataGrid1.Width - 200

lnBorder(0).X1 = Frame1.Left

lnBorder(0).X2 = Frame1.Width - Frame1.Left - 180

lnBorder(0).Y1 = txtDisp(3).Height + txtDisp(3).Top + 180

lnBorder(0).Y2 = lnBorder(0).Y1

lnBorder(2).X1 = lnBorder(1).X1

lnBorder(2).X2 = lnBorder(1).X2

lnBorder(2).Y1 = txtDisp(6).Height + txtDisp(6).Top + 180lnBorder(2).Y2 = lnBorder(2).Y1

LineMove Line2, Line1

LineMove lnBorder(1), lnBorder(0)

LineMove lnBorder(3), lnBorder(2)

picBox.Left = txtDisp(0).Left + txtDisp(0).Width + 200

picBox.Top = txtDisp(0).Top

picBox.Height = Frame1.Height - cmdRetrive.Height - Frame1.Top

picBox.Width = Frame1.Width - picBox.Left - picBox.Width + txtDisp(0).Width

cmdRetrive.Left = picBox.Left + picBox.Width - cmdRetrive.Width

pic.Top = Line1.Y1 + 200

Label9.Top = pic.Top

Label11.Top = Label9.Top + Label9.Height

Label19.Left = picBox.Left

Label19.Top = picBox.Top - Label19.Height

Image1.Top = pic.Top


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fraNavigation.Top = pic.Top

fraNavigation.Left = Line1.X2 - fraNavigation.Width

End Sub

Private Sub Form_Unload(Cancel As Integer)

'Destroys variables to free memory

Set RS = Nothing

Set frmMembers = Nothing

End Sub

Private Sub DataGrid1_KeyUp(KeyCode As Integer, Shift As Integer)

If KeyCode = 38 Or KeyCode = 40 Then DisplayRecords

End Sub

Private Sub DataGrid1_RowColChange(LastRow As Variant, ByVal LastCol As Integer)

DisplayRecords

End Sub

Private Sub DisplayRecords()

'-Display the current and total number of record

Dim i As Integer



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With RS

If .RecordCount < 1 Then

txtcount.Text = 0

Else

txtcount.Text = .AbsolutePosition

End If

lblmax.Caption = .RecordCount

For i = 0 To 6

txtDisp(i).Text = .Fields(i)

Next i

End With

End Sub

Private Sub cmdDelete_Click()

'Deletes a record

On Error GoTo hell

With RS

'-Check if there is no record

If .RecordCount < 1 Then MsgBox "No record to delete.", vbExclamation: Exit Sub

'-Confirm deletion of record

Dim ans As Integer, pos As Integer

ans = MsgBox("Are you sure you want to delete the selected record?", vbCritical +

vbYesNo, "Confirm Record Deletion")

Screen.MousePointer = vbHourglass

If ans = vbYes Then

'-Delete the record

pos = .AbsolutePosition

CN.BeginTrans


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.Delete

.Requery

CN.CommitTrans

If pos > .RecordCount Then

If Not .EOF Or .BOF Then .MoveFirst

Else

.AbsolutePosition = pos

End If

MsgBox "Record has been successfully deleted.", vbInformation, "Confirm"

End If

Screen.MousePointer = vbDefault

End With

Exit Sub

hell:

Handler Err

CN.RollbackTrans

End Sub

Private Sub cmdNavigate_Click(Index As Integer)

'

Navigate Index, RS

DisplayRecords

End Sub

Private Sub cmdRefresh_Click()

With RS

.Filter = adFilterNone


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.Requery

End With

End Sub

Private Sub cmdClose_Click()

Unload Me

End Sub

Private Sub cmdAMod_Click(Index As Integer)


With frmMembersAE

.AddState = Index

.OldID = RS.Fields(0)

If Index = 0 Then

.txtCode.Text = RS(0)

.txtFirst.Text = RS(1)

.txtM.Text = RS(2)

.txtLast.Text = RS(3)

.cmbClass.Text = RS(4)

.cmbSection = RS(5)

.txtRoll = RS(6)

End If

.Show vbModal

End With

cmdRefresh_Click

DisplayRecords


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End Sub

Add Book Form

Option Explicit

Private RS As ADODB.RecordSet


'Create recordset and refresh. Link Report icons to ImageList

On Error GoTo hell

Set RS = New ADODB.RecordSetRS.CursorLocation = adUseClient

RS.Open "SELECT * FROM tblBooks", CN, adOpenDynamic,

adLockOptimistic

Set DataGrid1.DataSource = RS

DisplayRecords

With frmMain.ImgList32



End With

Exit Sub

hell:

Handler Err

Resume Next

End Sub


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Private Sub Form_Resize()

'Resize form to different screen sizes and resolution, also when form is resized


SSTab1.Height = Me.Height - 2500

SSTab1.Width = Me.Width - 400

Line2.X1 = SSTab1.Left

Line2.X2 = SSTab1.Left + SSTab1.Width

Line2.Y1 = SSTab1.Top + SSTab1.Height + 400

Line2.Y2 = Line2.Y1Line2.ZOrder vbBringToFront

DataGrid1.Width = SSTab1.Width - 280

DataGrid1.Height = SSTab1.Height - 580

Frame1.Height = DataGrid1.Height - 100

Frame1.Width = DataGrid1.Width - 200

Line3.X1 = Frame1.Left

Line3.X2 = Frame1.Width - Frame1.Left - 180

Line3.Y1 = txtDisp(6).Height + txtDisp(6).Top + 1000

Line3.Y2 = Line3.Y1



pic.Top = Line1.Y1 + 200

Label9.Top = pic.Top

Label11.Top = Label9.Top + Label9.Height


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Image1.Top = pic.Top

fraNavigation.Top = pic.Top

fraNavigation.Left = Line1.X2 - fraNavigation.Width

End Sub

Private Sub Form_Unload(Cancel As Integer)

'Destroy recordset and form to free memory

Set RS = Nothing

Set frmBooks = Nothing

End Sub

Private Sub cmdOperations_Click(Index As Integer)

'Create new instances of Search/Sort/Filter forms and display them. Destroy when

done with

Dim obj As Form

If Index = 0 Then Set obj = frmSearch

If Index = 1 Then Set obj = frmFilter

If Index = 2 Then Set obj = frmSort

With obj

Set .SourceRs = RS

.Show vbModal

End With


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Set obj = Nothing

End Sub

Private Sub cmdReport_Click(Index As Integer)

'Create dynamic reports

If Index = 0 Then cmdRefresh_Click


drBookList.Show

End Sub

Private Sub DataGrid1_KeyUp(KeyCode As Integer, Shift As Integer)

'Allow keyboard navigation to display recordnumber

If KeyCode = 38 Or KeyCode = 40 Then DisplayRecords

End Sub

Private Sub DataGrid1_RowColChange(LastRow As Variant, ByVal LastCol As

Integer)

'Allow mouse navigation to display recordnumber

DisplayRecords

End Sub


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Private Sub DisplayRecords()

'Display the current and total number of record

Dim i As Integer


With RS

If .RecordCount < 1 Then

txtcount.Text = 0

Elsetxtcount.Text = .AbsolutePosition

End If

lblmax.Caption = .RecordCount

For i = 0 To 6

txtDisp(i).Text = .Fields(i)

Next iEnd With

txtDisp(5).Text = FormatCurrency$(txtDisp(5).Text)

End Sub

Private Sub cmdDelete_Click()

'Deletes a record, undeletable if a book is borrowed.

Dim ans As Integer, pos As Integer


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On Error GoTo hell

With RS

'Check if there is no record

If .RecordCount < 1 Then MsgBox "No record to delete.", vbExclamation: Exit

Sub

'Check whether book is borrowed

If .Fields("Borrowed") = True Then MsgBox "You cannot delete this book

record because it is borrowed by someone" & vbNewLine & "The book must be

returned to the library before its record can be deleted.", vbInformation, "Book

Borrowed"

'Confirm deletion of record

ans = MsgBox("Are you sure you want to delete the selected record?",vbCritical + vbYesNo, "Confirm Record Deletion")

Screen.MousePointer = vbHourglass

If ans = vbYes Then

'Delete the record

pos = .AbsolutePosition

CN.BeginTrans

.Delete

.Requery

CN.CommitTrans

If pos > .RecordCount Then

If Not .EOF Or .BOF Then .MoveFirst

Else

.AbsolutePosition = pos

End If

MsgBox "Record has been successfully deleted.", vbInformation, "Confirm"

End If

Screen.MousePointer = vbDefault

End With


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Exit Sub

hell:


Handler Err

CN.RollbackTrans

End Sub

Private Sub cmdNavigate_Click(Index As Integer)

'Navigate a recordset through command buttons

Navigate Index, RS

DisplayRecords

End Sub

Private Sub cmdRefresh_Click()

'Refresh the recordset

With RS

.Filter = adFilterNone

.Requery

End With

DisplayRecords

End Sub


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Private Sub cmdClose_Click()

'Close the form

Unload Me

End Sub

Private Sub cmdAMod_Click(Index As Integer)

'Open the add/edit form. Display current record values in form if modifying.


With frmBooksAE

.AddState = Index

.OldID = RS.Fields(0)

If Index = 0 Then

.msdID.Text = RS.Fields(0)

.txtTitle.Text = RS.Fields(1)

.txtAuthor.Text = RS.Fields(2)

.txtPublisher.Text = RS.Fields(3)

.cmbCategory.Text = RS.Fields(4)

.txtPrice.Text = RS.Fields(5)

.msdISBN.Text = RS.Fields(6)

End If

.Show vbModal

End With

cmdRefresh_Click

DisplayRecords


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End Sub

ISSUE BOOK Form

Option Explicit

Private Sub cmdBook_Click()

With frmSelectDg

.CommandText = "Select * From tblBooks where Borrowed=False"

.DataGrid1.Caption = "Members Table"

.Show vbModal

If .OKPressed Then

Text5.Text = .rRS1

Text2.Text = .rRS2

End If

End With

End Sub

Private Sub cmdCancel_Click()

Unload Me

End Sub

Private Sub cmdCode_Click()


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Dim A As String, b As String, c As String

With frmSelectDg

.CommandText = "Select * From tblMembers"


.Show vbModal

If .OKPressed Then

Text4.Text = .rRS1

A = .rRS2

b = .rRS3

c = .rRS4

Text1.Text = A & " " & b & " " & cEnd If

End With

End Sub

Private Sub cmdIssue_Click()

'Record that the book was taken in two places. In tblTrans, and in

'tblBooks which will set the Borrowed Boolean to True.

Dim RS As ADODB.RecordSet

If Text4.Text = "" Then Text4.SetFocus: Exit Sub


On Error GoTo hell

CN.BeginTrans


With RS


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.Open "Select * from tblTrans", CN, adOpenDynamic, adLockOptimistic

.AddNew

.Fields(0) = Text5.Text

.Fields(1) = Text4.Text

.Fields(2) = Date

.Update

.Close

.Open "Select [Borrowed] from tblBooks where [Book ID]='" & Text5.Text &

"'", CN, adOpenDynamic, adLockOptimistic

.MoveFirst

.Fields(0) = True

.Update

.Close

Set RS = Nothing

End With

CN.CommitTrans

If MsgBox("The book " & Text5.Text & " has been issued to " & Text4.Text &

vbNewLine & "Do you want to create a new issue instance?", vbInformation +vbYesNo) = vbYes Then

cmdReset_Click

Else

Unload Me

End If

Exit Sub

hell:

Handler Err

CN.RollbackTrans


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End Sub

Private Sub cmdReset_Click()

Text1.Text = ""

Text2.Text = ""

Text5.Text = ""

Text4.Text = ""

Text3.Text = FormatDateTime$(Date, vbLongDate)

Text6.Text = FormatDateTime$(Date + frmReturn.MaxDays, vbLongDate)

End Sub


cmdReset_Click

With frmMain

cmdCode.Picture = .ImgList16.ListImages(1).PictureMe.Icon = .ImgList32.ListImages(7).Picture

End With

cmdBook.Picture = cmdCode.Picture

Image1.Picture = Me.Icon

End Sub

Private Sub Text4_Keypress(Keyascii As Integer)

cmdCode_Click


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End Sub

Private Sub Text5_KeyPress(Keyascii As Integer)

cmdBook_Click

End Sub

RETURN BOOK Form

Option Explicit

Public MaxDays As Integer

Public FineAmnt As Currency

Private Sub cmdCancel_Click()

Unload Me

End Sub

Private Sub cmdReset_Click()

lblLate.Caption = "Select a book first"

lblFines.Caption = "Select a book first"

lblDate.Caption = "Select a book first"

txtFines.Text = ""

txtFines.Locked = True

Text1.Text = ""

Text4.Text = ""


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Text2.Text = FormatDateTime$(Date, vbLongDate)

End Sub

Private Sub cmdReturn_Click()

Dim RS As ADODB.RecordSet

If Text4.Text = "" Then Text4.SetFocus

On Error GoTo hell

Set RS = New ADODB.RecordSetWith RS

CN.BeginTrans 'Begin a new transaction

.Open "Select [Borrowed] from tblBooks where [Book ID]='" & Text4.Text & "'",

CN, adOpenDynamic, adLockOptimistic

.MoveFirst

.Fields(0) = False

.Update

.Close

.Open "Select [Fines],[Returned] From tblTrans where [Book ID]='" & Text4.Text &

"'" & "And [Returned] = False", CN, adOpenDynamic, adLockOptimistic

.MoveFirst

.Fields("Fines") = CCur(txtFines.Text)

.Fields("Returned") = True

.Update

.Close

CN.CommitTrans 'If no error was raised then record info

End With

Set RS = Nothing


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'Show MsgBox if another book needs returning

If MsgBox("The book " & Text4.Text & " has been returned from " & Text1.Text &

vbNewLine & vbNewLine & "Do you want to create a new return book instance?",

vbInformation + vbYesNo) = vbYes Then

cmdReset_Click

Else

Unload Me

End If

Exit Sub

hell:Handler Err

On Error Resume Next 'If an error was raised then rollback

CN.RollbackTrans 'any transaction so GIGO does not take place

'in the future.

End Sub

Private Sub cmdCode_Click()

Dim RS As ADODB.RecordSet, i As Integer

'The first part of this event procedure will open the frmSelectDg form

'and expect an input from the user. This will ease the selection part

'from the users point-of-view and validation part from the devolopers

'point-of-view.


With frmSelectDg


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'First show the box

.CommandText = "SELECT tblTrans.[Book ID], tblTrans.[Student ID],

tblBooks.Title, [First Name] & ' ' & [Middle Initial] & ' ' & [Last Name] AS Borrower,

tblTrans.[Date Borrowed] FROM tblMembers INNER JOIN (tblBooks INNER JOIN

tblTrans ON tblBooks.[Book ID] = tblTrans.[Book ID]) ON tblMembers.[Student ID] =

tblTrans.[Student ID] Where (((tblTrans.Returned) = False)) ORDER BY tblTrans.[Book

ID];"


.Show vbModal

'Now display the data

If .OKPressed Then

Text4.Text = .rRS1Text1.Text = .rRS2

txtFines.Locked = False

Else

'If the user did not enter anything then skip the second

'part of the procedure to skip errors that may arise because

'there will be no data (in text4 and text1) and as such

'null errors or record not found errors.

Exit Sub

End If

End With

'The second part will calculate the number of days a book was taken out

'of the library and print it in the txtFines text box.


RS.Open "Select * from tblTrans Where [Book ID] ='" & Text4.Text & "'", CN,

adOpenDynamic, adLockOptimistic

lblDate.Caption = CDate(RS(2)) 'Just for validation


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'Store the difference of the current date and the date returned

'in a variable. It the variable is negative it means that the

'book returned is within the time limit and Fines=i*FineAmnt

'must be 0. So transform i into 0

i = Date - CDate(lblDate.Caption)

If i < 0 Then i = 0

If MaxDays < i Then lblLate.Caption = i - MaxDays Else lblLate.Caption = "0"

'Print fines due in a label and a text box

lblFines.Caption = CStr(FormatCurrency$(FineAmnt * lblLate))

'Also, use an editable text box so the correct amount a member

'is payed is recorded. Sometimes the member may pay money not'exactly as required (payable $15 from $15.25 total fines)

txtFines.Text = lblFines.Caption

Set RS = Nothing

'So, practically all the librarian did was just select a book id through

'a GUI friendly interface and everything will be done by the system

End Sub

Private Sub Command4_Click()

On Error GoTo hell

Shell "calc.exe", vbNormalFocus

Exit Sub

hell:

MsgBox "The operating system cannot find the system calculator." & vbNewLine &

"Please check whether it is properly installed or not", vbCritical, "File not found"


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End Sub


Me.Icon = frmMain.ImgList32.ListImages(8).Picture

Image1.Picture = Me.Icon

cmdReset_Click

cmdCode.Picture = frmMain.ImgList16.ListImages(1).Picture

End Sub

Private Sub Text4_Keypress(Keyascii As Integer)

cmdCode_Click

End Sub

Search FormOption Explicit

Public SourceRs As ADODB.RecordSet

Private AlreadyFilled As Boolean

Private AlreadySearched As Boolean

Private CurrPos As Long

Private oldpos As Long

Private Sub Combo1_KeyPress(Keyascii As Integer)

Keyascii = 0


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End Sub


On Error GoTo Err


If Combo1.Text = "" Then Combo1.SetFocus: Exit Sub

With SourceRs

If AlreadySearched = False Then

oldpos = .AbsolutePosition

.MoveFirst

.Find "[" & Combo1.Text & "] like *" & Text1.Text & "*"CurrPos = .AbsolutePosition

If .EOF Then

MsgBox "Could not find '" & Text1.Text & "' in '" & Combo1.Text & "'.",

vbExclamation

.AbsolutePosition = oldpos

Else

AlreadySearched = True

Command1.Caption = "Search Next"

End If

Else

oldpos = .AbsolutePosition

.MoveNext

.Find "[" & Combo1.Text & "] like *" & Text1.Text & "*"

CurrPos = .AbsolutePosition

If .EOF Then MsgBox "Search completed.", vbInformation: AlreadySearched =

False: .AbsolutePosition = oldpos

End If

End With


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Exit Sub

Err:

If Err.Number = -2147217881 Then Search_Number: Resume Next

If Err.Number = 3265 Then MsgBox "Please select a valid section from the list",

vbExclamation: HighLight Text1: Exit Sub

Handler Err

End Sub

Private Sub Search_Number()

'For Number data type

On Error GoTo Err

SourceRs.Find "[" & Combo1.Text & "] like " & Text1.Text & ""

Exit Sub

Err:

Search_DateTime

End Sub

Private Sub Search_DateTime()

'For Date/Time data type

On Error GoTo Err

SourceRs.Find "[" & Combo1.Text & "] like #" & Text1.Text & "#"

Exit Sub


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Err:

MsgBox "Please enter an appropriate value that correspand" & vbCrLf & "where to find

it (ex.Search for 10/23/1985 and Look in Date).", vbExclamation

End Sub


Unload Me

End Sub


FillCombo Combo1, SourceRs, False

Me.Icon = Image1.Picture

Combo1.ListIndex = 0

End Sub

Private Sub Text1_Change()

AlreadySearched = False

End Sub


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Forms

(MDI) Form


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Add Member Form


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Add Book Form


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BOOK ISSUE FORM


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BOOKS RETURN FORM


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REPORTS

LIST OF BOOKS REPORT


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LIST OF MEMBERS REPORT


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LIST OF BOOKS UN RETURNED


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Bibliography

1. Evangels Petrotsos

Mastering Visual Basic 6,

BPB Publications

2. Content Development Group

Visual Basic 6.0 Programming

Tata McGraw Hill

3. Siler Spotls

Special Edition Using Visual Basic 6

Prentice-Hall India

4. Visual Basic Programming Bible

Wiley Sons India Ltd.

5. Complete reference to MS-ACCESS

Tata McGraw Hill

6. Silberschatz , Karth & Sudarshann

Database System Concepts

Tata McGraw Hill

7. Elmasri, Navathe

Fundamentals of Database System

Low Price Edition.

library management system project code in visual basic

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