jawaban No.2

kasus

http://mesran.wordpress.com/2012/01/26/soal-quiz-online-hari-kamis/comment-page-5/#comments

listing program

Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        BuatTabel()
        kode.Items.Add("TS001")
        kode.Items.Add("TS002")
        kode.Items.Add("VG001")
        kode.Items.Add("VG002")
    End Sub
    Sub barang()
        Dim x As String
        x = Microsoft.VisualBasic.Left(kode.Text, 2)
        If x = "TS" Then
            merk.Text = "Toshiba"
        ElseIf x = "VG" Then
            merk.Text = "V-Gen"
        End If
        x = Microsoft.VisualBasic.Mid(kode.Text, 3, 3)
        If x = "001" Then
            brg.Text = "Flasdisk 4GB"
        ElseIf x = "002" Then
            brg.Text = "Flasdisk 2GB"
        End If
        If kode.Text = "TS001" Then
            hrg.Text = 105000
        ElseIf kode.Text = "TS002" Then
            hrg.Text = 75000
        End If
        If kode.Text = "VG001" Then
            hrg.Text = 90000
        ElseIf kode.Text = "VG002" Then
            hrg.Text = 60000
        End If
    End Sub
    Sub BuatTabel()
        With LV
            .Columns.Add("No Pembelian", 80, HorizontalAlignment.Center)
            .Columns.Add("Kode Barang", 120, HorizontalAlignment.Left)
            .Columns.Add("Nama Barang", 100, HorizontalAlignment.Left)
            .Columns.Add("Merk", 100, HorizontalAlignment.Left)
            .Columns.Add("Harga", 100, HorizontalAlignment.Left)
            .Columns.Add("Jumlah Beli", 80, HorizontalAlignment.Left)
            .Columns.Add("Total Harga", 80, HorizontalAlignment.Left)
            .GridLines = True
            .FullRowSelect = True
            .View = View.Details
        End With
    End Sub
    Sub IsiTabel()
        Dim Lst As New ListViewItem
        With Lst
            .Text = pmblian.Text()
            .SubItems.Add(kode.Text)
            .SubItems.Add(brg.Text)
            .SubItems.Add(merk.Text)
            .SubItems.Add(hrg.Text)
            .SubItems.Add(jumlah.Text)
            .SubItems.Add(total.Text)
            LV.Items.Add(Lst)
        End With
    End Sub

    Private Sub kodbrg_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles kode.SelectedIndexChanged

        Call barang()
    End Sub

    Private Sub btnsimpan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsimpan.Click
        IsiTabel()
    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 btndata_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btndata.Click
        LV.Items.Remove(LV.SelectedItems(0))
    End Sub

    Private Sub btnbersih_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnbersih.Click
        pmblian.Text = ""
        kode.Text = ""
        brg.Text = ""
        merk.Text = ""
        hrg.Text = ""
        jumlah.Text = ""
        total.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 jlhbeli_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles jumlah.TextChanged
        total.Text = Val(jumlah.Text) * Val(hrg.Text)
    End Sub
End Class

hasil program