Membuat Aplikasi Penjualan Buku Sederhana

Teknik Informatika Universitas Serambi Mekkah

Modul Dasar Pemrograman III (VB.Net) Hal. 1

Membuat Aplikasi Penjualan Buku Sederhana

Langkah-langkah dalam membuat aplikasi adalah sebagai berikut :

1. Buat project baru dengan nama Aplikasi Penjualan lalu simpan pada Local Disc di PC atau Laptop

Anda.

2. Buatlah database dengan nama JualBuku.accdb lalu simpan kedalam folder Aplikasi Penjualan >

bin > debug kemudian rancanglah struktur tabel seperti berikut ini :

Nama Tabel : Jenis

Field Type Size Keterangan

KodeJenis Text 2 Primary Key (PK)

Jenis Text 50

Nama Tabel : Buku


KodeBuku Text 3 Primary Key (PK)

KodeJenis Text 2 Foreign Key (FK)

Judul Text 100

Pengarang Text 50

Penerbit Text 50

Jumlah Number

Harga Number

Deskripsi Text 200

Nama Tabel : Transaksi


NoFaktur Text 11 Primary Key (PK)

TglFaktur Date/Time

Pukul Date/Time

NamaPembeli Text 50

NoTelp Text 12

Total Number

Dibayar Number

Kembali Number

Item Number

Nama Tabel : DetailTransaksi


NoFaktur Text 11

KodeBuku Text 3

Judul Text 150

Jumlah Number

HargaJual Number

SubTotal Number



Entity Relationship Diagram (ERD) Aplikasi Penjualan Buku Komputer

Gambar 1. Rancangan ERD

Rancanglah Form Menu, Form Jenis Buku, dan Form Data Buku, Form Transaksi Penjualan Buku

seperti gambar berikut :

Gambar 2. Menu Aplikasi Penjualan Buku Komputer

Tulislah koding menunya sebagai berikut : Public Class Form1

Private Sub DataJenisBukuToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles DataJenisBukuToolStripMenuItem.Click

Form2.Show()

End Sub

MenuStrip1

StatusStrip1

GroupBox1

Button

1



Private Sub DataBukuToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles DataBukuToolStripMenuItem.Click

Form3.Show()

End Sub

Private Sub KeluarToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles KeluarToolStripMenuItem.Click

If MessageBox.Show("Yakin akan menutup aplikasi ini..?", "", MessageBoxButtons.YesNo)

= Windows.Forms.DialogResult.Yes Then

End

End If

End Sub

End Class

Gambar 3. Rancangan Form Data Jenis Buku

TextBox3

TextBox1

TextBox2

Button1

TextBox2

Button2

Button3

Button4

DataGridView1



Gambar 4. Rancangan Form Data Buku

Gambar 5. Rancangan Form Transaksi Penjualan Buku

DataGridView1

TextBox2

TextBox3

TextBox4

TextBox5

TextBox8

TextBox5

TextBox7

TextBox9

Button5

Button4

Button3

Button2

Button1

ComboBox1

TextBox6

TextBox1

TextBox1

TextBox2

TextBox3

TextBox4

TextBox5

Button1

Button2

Button3

TextBox6

Button3

Label10

TextBox7

TextBox8

TextBox9

DataGridView1

Button4



Tambahkan sebuah module kemudian tulislah koding dibawah ini : Imports System.Data.OleDb

Module Module1

Public Conn As OleDbConnection

Public da As OleDbDataAdapter

Public ds As DataSet

Public cmd As OleDbCommand

Public rd As OleDbDataReader

Public Str As String

Public Sub Koneksi()

Str = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & Application.StartupPath &

"\JualBuku.accdb"

Conn = New OleDbConnection(Str)

If Conn.State = ConnectionState.Closed Then

Conn.Open()

End If

End Sub

End Module

Hasil Form2 (Jenis Buku) setelah dijalankan

Gambar 6. Hasil Form2 (Jenis Buku)

Kodingnya sebagai berikut : Imports System.Data.OleDb

Public Class Form2

Sub Kosong()

TextBox1.Clear()

TextBox2.Clear()

TextBox1.Focus()

End Sub

Sub Isi()

TextBox2.Clear()

TextBox2.Focus()

End Sub



Sub TampilJenis()

da = New OleDbDataAdapter("Select * From Jenis", Conn)

ds = New DataSet

ds.Clear()

da.Fill(ds, "Jenis")

DataGridView1.DataSource = ds.Tables("Jenis")

DataGridView1.Refresh()

End Sub

Sub AturGrid()

DataGridView1.Columns(0).Width = 60


DataGridView1.Columns(0).HeaderText = "KODE JENIS"

DataGridView1.Columns(1).HeaderText = "NAMA JENIS"

End Sub

Private Sub Form2_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles

Me.Load

Call Koneksi()

Call TampilJenis()

Call Kosong()

Call AturGrid()

End Sub

Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As

System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress

TextBox2.MaxLength = 50

If e.KeyChar = Chr(13) Then

TextBox2.Text = UCase(TextBox2.Text)

End If

End Sub

Private Sub DataGridView1_CellContentClick(ByVal sender As Object, ByVal e As

System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick

Dim i As Integer

i = Me.DataGridView1.CurrentRow.Index

With DataGridView1.Rows.Item(i)

Me.TextBox1.Text = .Cells(0).Value


End With

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles Button1.Click

If TextBox1.Text = "" Or TextBox2.Text = "" Then

MsgBox("Data belum lengkap..!")

TextBox1.Focus()

Exit Sub

Else

cmd = New OleDbCommand("Select * From Jenis where KodeJenis='" & TextBox1.Text &

"'", Conn)

rd = cmd.ExecuteReader

rd.Read()

If Not rd.HasRows Then

Dim Simpan As String = "insert into Jenis(KodeJenis,Jenis)values " & _

"('" & TextBox1.Text & "','" & TextBox2.Text & "')"

cmd = New OleDbCommand(Simpan, Conn)

cmd.ExecuteNonQuery()

MsgBox("Simpan data sukses...!", MsgBoxStyle.Information, "Perhatian")

End If

Call TampilJenis()

Call Kosong()

TextBox1.Focus()

End If

End Sub





If TextBox1.Text = "" Then

MsgBox("Kode Jenis belum diisi")

TextBox1.Focus()

Exit Sub

Else

Dim Ubah As String = "Update Jenis set " & _

"Jenis='" & TextBox2.Text & "' " & _

"where KodeJenis='" & TextBox1.Text & "'"

cmd = New OleDbCommand(Ubah, Conn)


MsgBox("Ubah data sukses..!", MsgBoxStyle.Information, "Perhatian")

Call TampilJenis()

Call Kosong()

TextBox1.Focus()

End If

End Sub




MsgBox("Kode Buku belum diisi")

TextBox1.Focus()

Exit Sub

Else

If MessageBox.Show("Yakin akan menghapus Data Jenis " & TextBox1.Text & " ?", "",

MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.Yes Then

cmd = New OleDbCommand("Delete * From Jenis where KodeJenis='" & TextBox1.Text

& "'", Conn)


Call Kosong()

Call TampilJenis()

Else

Call Kosong()

End If

End If

End Sub



Call Kosong()

End Sub





cmd = New OleDbCommand("Select * From Jenis where KodeJenis='" & TextBox1.Text &

"'", Conn)


rd.Read()

If rd.HasRows = True Then

TextBox2.Text = rd.Item(1)

TextBox2.Focus()

Else

Call Isi()

TextBox2.Focus()

End If

End If

End Sub

Private Sub TextBox3_TextChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles TextBox3.TextChanged

cmd = New OleDbCommand("Select * From Jenis where KodeJenis like '%" & TextBox3.Text &

"%'", Conn)


rd.Read()

If rd.HasRows Then

da = New OleDbDataAdapter("Select * From Jenis where KodeJenis like '%" &

TextBox3.Text & "%'", Conn)

ds = New DataSet

da.Fill(ds, "Dapat")

DataGridView1.DataSource = ds.Tables("Dapat")



DataGridView1.ReadOnly = True

Else

MsgBox("Data tidak ditemukan")

End If

End Sub

End Class

Hasil Form3 (Data Buku) setelah dijalankan

Gambar 7. Hasil Form3 (Data Buku)


Public Class Form3

Sub Kosong()

TextBox1.Clear()

ComboBox1.Text = ""

TextBox2.Clear()

TextBox3.Clear()

TextBox4.Clear()

TextBox5.Clear()

TextBox6.Clear()

TextBox7.Clear()

TextBox8.Clear()

TextBox1.Focus()

End Sub

Sub Isi()

ComboBox1.Text = ""

TextBox2.Clear()

TextBox3.Clear()

TextBox4.Clear()

TextBox5.Clear()

TextBox6.Clear()

TextBox7.Clear()

ComboBox1.Focus()

End Sub



Sub TampilBuku()

da = New OleDbDataAdapter("Select * From Buku", Conn)

ds = New DataSet

ds.Clear()

da.Fill(ds, "Buku")

DataGridView1.DataSource = ds.Tables("Buku")

DataGridView1.Refresh()

End Sub

Sub TampilJenis()

cmd = New OleDbCommand("Select KodeJenis From Jenis", Conn)


Do While rd.Read

ComboBox1.Items.Add(rd.Item(0))

Loop

End Sub

Sub AturGrid()









DataGridView1.Columns(0).HeaderText = "KODE BARANG"

DataGridView1.Columns(1).HeaderText = "KODE JENIS"

DataGridView1.Columns(2).HeaderText = "JUDUL"

DataGridView1.Columns(3).HeaderText = "PENGARANG"

DataGridView1.Columns(4).HeaderText = "PENERBIT"

DataGridView1.Columns(5).HeaderText = "JUMLAH"

DataGridView1.Columns(6).HeaderText = "HARGA"

DataGridView1.Columns(7).HeaderText = "DESKRIPSI"

End Sub


Me.Load

Call Koneksi()

Call TampilJenis()

Call TampilBuku()

Call Kosong()

Call AturGrid()

End Sub





cmd = New OleDbCommand("Select * From Buku where KodeBuku='" & TextBox1.Text &

"'", Conn)


rd.Read()


ComboBox1.Text = rd.Item(1)







TextBox2.Focus()

Else

Call Isi()

ComboBox1.Focus()

End If

End If

End Sub








TextBox3.Focus()

End If

End Sub





TextBox4.Focus()

End If

End Sub

Private Sub ComboBox1_KeyPress(ByVal sender As Object, ByVal e As

System.Windows.Forms.KeyPressEventArgs) Handles ComboBox1.KeyPress

If e.KeyChar = Chr(13) Then TextBox2.Focus()

End Sub

Private Sub DataGridView1_CellContentClick(ByVal sender As Object, ByVal e As

System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick

Dim i As Integer

i = Me.DataGridView1.CurrentRow.Index

With DataGridView1.Rows.Item(i)


Me.ComboBox1.Text = .Cells(1).Value







End With

End Sub



If TextBox1.Text = "" Or ComboBox1.Text = "" Or TextBox2.Text = "" Or TextBox3.Text =

"" Or TextBox4.Text = "" Or TextBox5.Text = "" Or TextBox6.Text = "" Then

MsgBox("Data belum lengkap..!")

TextBox1.Focus()

Exit Sub

Else

cmd = New OleDbCommand("Select * From Buku where KodeBuku='" & TextBox1.Text &

"'", Conn)


rd.Read()


Dim Simpan As String = "insert into

Buku(KodeBuku,KodeJenis,Judul,Pengarang,Penerbit,JumlahBuku,Harga,Deskripsi)values " & _

"('" & TextBox1.Text & "','" & ComboBox1.Text & "','" & TextBox2.Text & "','"

& TextBox3.Text & "','" & TextBox4.Text & "','" & TextBox5.Text & "','" & TextBox6.Text &

"','" & TextBox7.Text & "')"

cmd = New OleDbCommand(Simpan, Conn)


MsgBox("Simpan data sukses...!", MsgBoxStyle.Information, "Perhatian")

End If

Call TampilBuku()

Call Kosong()

TextBox1.Focus()

End If

End Sub



Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

Button2.Click



TextBox1.Focus()

Exit Sub

Else

Dim Ubah As String = "Update Buku set " & _

"KodeJenis='" & ComboBox1.Text & "'," & _

"Judul='" & TextBox2.Text & "'," & _

"Pengarang='" & TextBox3.Text & "'," & _

"Penerbit='" & TextBox4.Text & "'," & _

"JumlahBuku='" & TextBox5.Text & "'," & _

"Harga='" & TextBox6.Text & "'," & _

"Deskripsi='" & TextBox7.Text & "' " & _

"where KodeBuku='" & TextBox1.Text & "'"

cmd = New OleDbCommand(Ubah, Conn)


MsgBox("Ubah data sukses..!", MsgBoxStyle.Information, "Perhatian")

Call TampilBuku()

Call Kosong()

TextBox1.Focus()

End If

End Sub





TextBox1.Focus()

Exit Sub

Else

If MessageBox.Show("Yakin akan menghapus Data Buku " & TextBox1.Text & " ?", "",

MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.Yes Then

cmd = New OleDbCommand("Delete * From Buku where KodeBuku='" & TextBox1.Text &

"'", Conn)


Call Kosong()

Call TampilBuku()

Else

Call Kosong()

End If

End If

End Sub



Call Kosong()

End Sub

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles ComboBox1.SelectedIndexChanged

cmd = New OleDbCommand("Select * From Jenis where KodeJenis='" & ComboBox1.Text & "'",

Conn)


rd.Read()



Else

MsgBox("Kode jenis ini tidak terdaftar")

End If

End Sub





TextBox5.Focus()

End If

End Sub





If e.KeyChar = Chr(13) Then TextBox6.Focus()

End Sub





TextBox7.Focus()

End If

End Sub



Me.Close()

End Sub

Private Sub TextBox9_TextChanged(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles TextBox9.TextChanged

cmd = New OleDbCommand("Select * From Buku where Judul like '%" & TextBox9.Text &

"%'", Conn)


rd.Read()

If rd.HasRows Then

da = New OleDbDataAdapter("Select * From Buku where Judul like '%" & TextBox9.Text

& "%'", Conn)

ds = New DataSet

da.Fill(ds, "Dapat")

DataGridView1.DataSource = ds.Tables("Dapat")

DataGridView1.ReadOnly = True

Else

MsgBox("Data tidak ditemukan")

End If

End Sub






Button1.Focus()

End If

End Sub

End Class



Hasil Form4 (Transaksi Penjualan Buku Komputer) setelah dijalankan

Gambar 8. Hasil Form4 (Transaksi Penjualan)


Public Class Form4

Sub Kosong()

TextBox4.Clear()

TextBox5.Clear()

TextBox6.Clear()

TextBox7.Clear()

TextBox8.Clear()

TextBox4.Focus()

End Sub

Sub TidakAktif()

TextBox1.Enabled = False



End Sub

Sub KolomBaru()

DataGridView1.Columns.Add("Kode", "KODE BUKU")

DataGridView1.Columns.Add("Nama", "NAMA BUKU")

DataGridView1.Columns.Add("Harga", "HARGA")

DataGridView1.Columns.Add("Jumlah", "QTY")

DataGridView1.Columns.Add("Total", "SUB TOTAL")

Call LebarKolom()

End Sub

Sub LebarKolom()






End Sub



Private Sub Otomatis()

cmd = New OleDbCommand("Select * from Transaksi where NoFaktur in (select

max(NoFaktur) from Transaksi) order by NoFaktur desc", Conn)

Dim urutan As String

Dim hitung As Long


rd.Read()


urutan = "TR" + Format(Now, "yyMMdd") + "001"

Else

If Microsoft.VisualBasic.Mid(rd.GetString(0), 3, 6) Format(Now, "yyMMdd") Then

urutan = "TR" + Format(Now, "yyMMdd") + "001"

Else

hitung = Microsoft.VisualBasic.Right(rd.GetString(0), 2) + 1

urutan = "TR" + Format(Now, "yyMMdd") + Microsoft.VisualBasic.Right("000" &

hitung, 3)

End If

End If

TextBox1.Text = urutan

End Sub

Sub TampilBuku()

cmd = New OleDbCommand("Select KodeBuku From Buku", Conn)


End Sub

Private Sub Form4_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles

Me.Activated

Call Otomatis()

TextBox2.Text = Today

TextBox3.Text = TimeOfDay

End Sub


Me.Load

Call Koneksi()

Call KolomBaru()

Call Kosong()

Call TidakAktif()

Call TampilBuku()

End Sub

Sub TotalItem()

Dim HitungItem As Integer = 0

For I As Integer = 0 To DataGridView1.Rows.Count - 1

HitungItem = HitungItem + Val(DataGridView1.Rows(I).Cells(3).Value)

TextBox9.Text = HitungItem

Next

End Sub

Sub TotalHarga()

Dim HitungHarga As Integer = 0

For I As Integer = 0 To DataGridView1.Rows.Count - 1

HitungHarga = HitungHarga + Val(DataGridView1.Rows(I).Cells(4).Value)

TextBox6.Text = HitungHarga

Label10.Text = HitungHarga

Next

End Sub

Sub HapusBaris()

On Error Resume Next

Dim Baris As Integer = DataGridView1.CurrentCell.RowIndex

DataGridView1.Rows(baris).Cells(0).Value = ""

Chr(30)

End Sub

Private Sub DataGridView1_KeyDown(ByVal sender As Object, ByVal e As

System.Windows.Forms.KeyEventArgs)

If e.KeyCode = Keys.Up Then

DataGridView1.CurrentCell = DataGridView1.Rows(0).Cells(3)

End If

End Sub



Private Sub DataGridView1_KeyPress(ByVal sender As Object, ByVal e As

System.Windows.Forms.KeyPressEventArgs)

On Error Resume Next


DataGridView1.Rows.RemoveAt(DataGridView1.CurrentCell.RowIndex)

Call TotalItem()

Call TotalHarga()

TextBox7.Clear()

TextBox8.Text = ""

End If

End Sub




If Val(TextBox7.Text) < Val(TextBox6.Text) Then

MsgBox("Pembayaran kurang")

TextBox8.Text = ""

TextBox7.Focus()

Exit Sub

ElseIf Val(TextBox7.Text) = Val(TextBox6.Text) Then

TextBox8.Text = 0

Button2.Focus()

Else

TextBox8.Text = Val(TextBox7.Text) - Val(TextBox6.Text)

Button2.Focus()

End If

End If

If Not ((e.KeyChar >= "0" And e.KeyChar 57) And Asc(ex.KeyChar) 8) Then

ex.Handled = True

End If

End If

End Sub



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

Button1.Click

If TextBox1.Text = "" Or TextBox2.Text = "" Or TextBox3.Text = "" Or TextBox4.Text =

"" Or TextBox5.Text = "" Or TextBox6.Text = "" Or TextBox7.Text = "" Or TextBox8.Text = ""

Then

MsgBox("Data belum lengkap, tidak ada transaksi atau pembayaran masih kosong")

Exit Sub

End If

'Simpan ke tabel Transaksi

Dim SimpanTransaksi As String = "Insert into

Transaksi(NoFaktur,TglFaktur,Pukul,NamaPembeli,NoTelp,Total,Dibayar,Kembali,Item) values " & _

"('" & TextBox1.Text & "','" & TextBox2.Text & "','" & TextBox3.Text & "','" &

TextBox4.Text & "','" & TextBox5.Text & "','" & TextBox6.Text & "','" & TextBox7.Text & "','"

& TextBox8.Text & "','" & TextBox9.Text & "')"

cmd = New OleDbCommand(SimpanTransaksi, Conn)


For baris As Integer = 0 To DataGridView1.Rows.Count - 2

'Simpan ke tabel DetailTransaksi

Dim SimpanDetailTransaksi As String = "Insert into DetailTransaksi

(NoFaktur,KodeBuku,Judul,HargaJual,Jumlah,SubTotal) values " & _

"('" & TextBox1.Text & "','" & DataGridView1.Rows(baris).Cells(0).Value & "','" &

DataGridView1.Rows(baris).Cells(1).Value & "','" & DataGridView1.Rows(baris).Cells(2).Value &

"','" & DataGridView1.Rows(baris).Cells(3).Value & "','" &

DataGridView1.Rows(baris).Cells(4).Value & "')"

cmd = New OleDbCommand(SimpanDetailTransaksi, Conn)


'Kurangi stok Buku

cmd = New OleDbCommand("select * from Buku where KodeBuku='" &

DataGridView1.Rows(baris).Cells(0).Value & "'", Conn)


rd.Read()

If rd.HasRows Then

Dim KurangiStok As String = "update Buku set JumlahBuku= '" & rd.Item(5) -

DataGridView1.Rows(baris).Cells(3).Value & "' where KodeBuku='" &

DataGridView1.Rows(baris).Cells(0).Value & "'"

cmd = New OleDbCommand(KurangiStok, Conn)


End If

Next baris

DataGridView1.Columns.Clear()

Call KolomBaru()

Call Otomatis()

Call Kosong()

End Sub

Sub kena(ByVal myGrid As DataGrid)

myGrid.CurrentCell = New DataGridCell(1, 1)

End Sub



Private Sub DataGridView1_CellEndEdit1(ByVal sender As Object, ByVal e As

System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellEndEdit

If e.ColumnIndex = 0 Then


DataGridView1.Rows(e.RowIndex).Cells(0).Value & "'", Conn)


rd.Read()

If rd.HasRows Then

DataGridView1.Rows(e.RowIndex).Cells(1).Value = rd.Item(2)

DataGridView1.Rows(e.RowIndex).Cells(2).Value = rd.Item(6)

DataGridView1.Rows(e.RowIndex).Cells(3).Value = 1

DataGridView1.Rows(e.RowIndex).Cells(4).Value =

DataGridView1.Rows(e.RowIndex).Cells(2).Value * DataGridView1.Rows(e.RowIndex).Cells(3).Value

Call TotalItem()

Call TotalHarga()

Else

MsgBox("Kode buku tidak terdaftar")

End If

End If

If e.ColumnIndex = 3 Then


DataGridView1.Rows(e.RowIndex).Cells(0).Value & "'", Conn)


rd.Read()

If rd.HasRows Then

If DataGridView1.Rows(e.RowIndex).Cells(3).Value > rd.Item(5) Then

MsgBox("Stok Buku hanya ada " & rd.Item(5) & "")

DataGridView1.Rows(e.RowIndex).Cells(3).Value = 1



Call TotalItem()

Call TotalHarga()

Else



Call TotalItem()

Call TotalHarga()

End If

End If

DataGridView1.CurrentCell = DataGridView1.Rows(0).Cells(0)

End If

End Sub





TextBox5.Focus()

End If

End Sub





DataGridView1.Focus()

End If

End Sub



Form3.ShowDialog()

End Sub

End Class

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Membuat Aplikasi Penjualan Buku Sederhana

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