Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
JenisBuku.Items.Add("Novel")
JenisBuku.Items.Add("Motivasi")
JenisBuku.Items.Add("Sejarah")
JenisBuku.Items.Add("Tokoh")
Harga.ReadOnly = True
Discount.ReadOnly = True
TotalHarga.ReadOnly = True
TotalBayar.ReadOnly = True
End Sub
Private Sub JenisBuku_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles JenisBuku.SelectedIndexChanged
Select Case JenisBuku.Text
Case "Novel"
Harga.Text = 135000
Case "Motivasi"
Harga.Text = 105000
Case "Sejarah"
Harga.Text = 140000
Case Else
Harga.Text = 133000
End Select
End Sub
Private Sub Jumlah_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Jumlah.KeyPress
Dim x, y As Integer
If Asc(e.KeyChar) = 13 Then
If Jumlah.Text = "" Or Harga.Text = "" Then
JenisBuku.Focus()
Else
TotalHarga.Text = Val(Jumlah.Text) * Val(Harga.Text)
End If
If JenisBuku.Text = "Novel" Then
x = 0.2 * TotalHarga.Text
ElseIf JenisBuku.Text = "Motivasi" Then
x = 0.05 * TotalHarga.Text
ElseIf JenisBuku.Text = "Sejarag" Then
x = 0.5 * TotalHarga.Text
Else
x = 0.15 * TotalHarga.Text
End If
If TotalHarga.Text >= 2000000 Then
y = 0.1 * TotalHarga.Text
Else
y = 0
End If
Discount.Text = Val(x) + Val(y)
TotalBayar.Text = Val(TotalHarga.Text) - Val(Discount.Text)
End If
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
JenisBuku.Text = ""
Harga.Text = ""
Jumlah.Text = ""
TotalHarga.Text = ""
Discount.Text = ""
TotalBayar.Text = ""
JenisBuku.Focus()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
End Class
