UTS Lab. SMBD Normalisasi Database

1 NF
Faktur(No Faktur, Kode Supplier, Nama Supplier, Kode Barang, Nama Barang, Quantitas, Harga, Jumlah,).

2 NF
TableSupplier(Kode Supplier, Nama Supplier)
TableBarang(Kode Barang, Nama barang, harga)
TableFaktur(No Faktur, Kode Supplier, Kode barang, Quantitas)

SOURCE CODE Web Form Asp.net

Imports System.Data
Imports System.Data.OleDb

Public Class TransaksiBarang
    Inherits System.Web.UI.Page

    Public constring As String = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString
    Public oConn As New OleDbConnection(constring)
    Public oTbl As New DataTable
    Public xReader As OleDbDataReader

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub

    Protected Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Dim sql As String = "INSERT INTO TableBarang VALUES ('" & KodeBarang.Text & "','" & NamaBarang.Text & "','" & Harga.Text & "')"
        Dim oCmd As New OleDbCommand
        oConn.Open()
        oCmd.Connection = oConn
        oCmd.CommandText = sql
        oCmd.ExecuteNonQuery()
    End Sub

    Protected Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click

        Dim sql As String = " UPDATE TableBarang set Nama_Barang  ='" & NamaBarang.Text & "', Harga = '" & Harga.Text & "' where Kode_Barang = '" & KodeBarang.Text & "'"

        Dim oCmd As New OleDbCommand
        oConn.Close()
        oConn.Open()
        oCmd.Connection = oConn
        oCmd.CommandText = sql

        oCmd.ExecuteNonQuery()

    End Sub

    Protected Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
        Dim hapus = MsgBox("Konfirmasi", MsgBoxStyle.YesNo, "Hapus")

        If hapus = vbYes Then
            oConn.Close()
            oConn.Open()
            Dim delet As String = "DELETE FROM TableBarang where Kode_Barang ='" + KodeBarang.Text + "'"
            Dim oCmd As New OleDbCommand
            oConn.Close()
            oConn.Open()
            oCmd.Connection = oConn
            oCmd.CommandText = delet
            oCmd.ExecuteNonQuery()
            MsgBox("Sudah terhapus", vbArchive)

            KodeBarang.Text = ""
            NamaBarang.Text = ""
            Harga.Text = ""


        End If
    End Sub

    Protected Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click

        oConn.Close()
        oConn.Open()
        Dim Cmd As New OleDbCommand("SELECT * FROM TableBarang where Kode_Barang ='" + KodeBarang.Text + "'", oConn)
        xReader = Cmd.ExecuteReader
        If xReader.HasRows Then
            xReader.Read()
            KodeBarang.Text = xReader("Kode_Barang")
            NamaBarang.Text = xReader("Nama_Barang")
            Harga.Text = xReader("Harga")


        Else
            MsgBox("Kode Barang Tidak Ada")
            KodeBarang.Text = ""
            NamaBarang.Text = ""
            Harga.Text = ""
            Exit Sub
        End If
        xReader.Close()
    End Sub
End Class