PENAGIHAN LISTRIK MENGGUNAKAN VB

Public Class Form1
    Sub buattabel()
        lv.Columns.Add("Kode Rekening", 90, HorizontalAlignment.Center)
        lv.Columns.Add("Nomor Rumah", 90, HorizontalAlignment.Center)
        lv.Columns.Add("Wilayah", 90, HorizontalAlignment.Center)
        lv.Columns.Add("Alamat", 90, HorizontalAlignment.Center)
        lv.Columns.Add("Pemakaian Listrik", 98, HorizontalAlignment.Center)
        lv.Columns.Add("Tagihan", 100, HorizontalAlignment.Center)
        lv.Columns.Add("Pajak", 80, HorizontalAlignment.Center)
        lv.Columns.Add("Total Tagihan", 85, HorizontalAlignment.Center)
        lv.View = View.Details
        lv.GridLines = True
        lv.FullRowSelect = True
    End Sub
    Sub isitabel()
        Dim lst As New ListViewItem
        lst.Text = kode.Text
        lst.SubItems.Add(nomor.Text)
        lst.SubItems.Add(wilayah.Text)
        lst.SubItems.Add(alamat.Text)
        lst.SubItems.Add(listrik.Text)
        lst.SubItems.Add(tagihan.Text)
        lst.SubItems.Add(pajak.Text)
        lst.SubItems.Add(total.Text)
        lv.Items.Add(lst)
    End Sub

    Private Sub kode_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles kode.SelectedIndexChanged
        Select Case kode.Text
            Case "123"
                nomor.Text = "6 B"
                alamat.Text = "Jln.sisimangaraja"
                wilayah.Text = "Medan maimun"
                listrik.Text = "400 watt"
                tagihan.Text = "50000"
            Case "456"
                nomor.Text = "7 A"
                alamat.Text = "Jln.A.H.nasution"
                wilayah.Text = "Medan johor"
                listrik.Text = "550 Watt"
                tagihan.Text = "100000"
            Case "789"
                nomor.Text = "9 A"
                alamat.Text = "Jln.tritura"
                wilayah.Text = "Medan johor"
                listrik.Text = "600 Watt"
                tagihan.Text = "160000"
        End Select
        pajak.Text = 0.1 * tagihan.Text
    End Sub

    Private Sub btnproses_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnproses.Click
        total.Text = Val(tagihan.Text) + Val(listrik.Text) + Val(pajak.Text)
    End Sub

    Private Sub Btnkeluar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnkeluar.Click
        End
    End Sub

    Private Sub Btnsimpan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnsimpan.Click
        buattabel()
        isitabel()
        kode.Text = ""
        nomor.Text = ""
        wilayah.Text = ""
        alamat.Text = ""
        listrik.Text = ""
        tagihan.Text = ""
        pajak.Text = ""
        total.Text = ""
    End Sub

    Private Sub Btnhapus1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnhapus1.Click
        lv.Items.Remove(lv.SelectedItems(0))
    End Sub

    Private Sub Btnhapus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnhapus.Click
        lv.Items.Clear()
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        kode.Items.Add("123")
        kode.Items.Add("456")
        kode.Items.Add("789")

    End Sub