Latihan Database Program Mahasiswa

Desain Form Mahasiswa

Kita buat dahulu databasenya

 

Di bawah ini adalah listing program form di atas

Imports MySql.Data.MySqlClient

Public Class Form1

    Public db As New MySql.Data.MySqlClient.MySqlConnection

    Public sql As String

    Public cmd As MySqlCommand

    Public rs As MySqlDataReader

    Sub opendb()

        sql = "server=localhost;uid=root;pwd;database=AKADEMIK"

        Try

            db.ConnectionString = sql

            db.Open()

        Catch ex As Exception

            MessageBox.Show(ex.Message)

        End Try

    End Sub

    Sub bersih()

        NPM.Text = ""

        NM.Text = ""

        JNJNG.Text = ""

        JRSN.Text = ""

        rubahtombol(True, False, False, False, True)

        NPM.Enabled = True

    End Sub

    Sub rubahtombol(ByRef btn1 As Boolean, ByVal btn2 As Boolean, ByVal btn3 As Boolean, ByVal btn4 As Boolean, ByVal btn5 As Boolean)

        BR.Enabled = btn1

        SMPN.Enabled = btn2

        HPS.Enabled = btn3

        BTL.Enabled = btn4

        KLR.Enabled = btn5

    End Sub

    Sub buattabel()

        LV.Columns.Add("NPM", 80, HorizontalAlignment.Center)

        LV.Columns.Add("NAMA", 180, HorizontalAlignment.Left)

        LV.Columns.Add("JENJANG", 80, HorizontalAlignment.Left)

        LV.Columns.Add("JURUSAN", 100, HorizontalAlignment.Left)

        LV.GridLines = True

        LV.FullRowSelect = True

        LV.View = View.Details

    End Sub

    Sub isitabel()

        LV.Items.Clear()

        sql = "select*from mahasiswa"

        cmd = New MySqlCommand(sql, db)

        rs = cmd.ExecuteReader

        Try

            While rs.Read

                Dim lst As New ListViewItem

                lst.Text = rs("NPM")

                lst.SubItems.Add(rs("NAMA"))

                lst.SubItems.Add(rs("JENJANG"))

                lst.SubItems.Add(rs("JURUSAN"))

                LV.Items.Add(lst)

            End While

        Catch ex As Exception

            MsgBox(ex.Message)

        End Try

        rs.Close()

    End Sub

    Sub prosesdb(ByVal log As Integer)

        Dim pesan As String = ""

        Select Case log

            Case 0

                sql = "insert into mahasiswa(NPM,NAMA,JENJANG,JURUSAN)" & _

                    "values('" & NPM.Text & _

                    "','" & NM.Text & _

                    "','" & JNJNG.Text & _

                    "','" & JRSN.Text & "')"

                pesan = "data telah tersimpan"

            Case 1

                sql = "update mahasiswa set nama='" & NM.Text & "', " & _

                    "jenjang='" & JNJNG.Text & "'," & _

                    "jurusan='" & JRSN.Text & "' " & _

                    "where npm='" & NPM.Text & "'"

                pesan = "data telah terupdate"

            Case 2

                sql = "delete from mahasiswa where npm='" & NPM.Text & "'"

                pesan = "data telah dihapus"

        End Select

        Try

            cmd = New MySqlCommand(sql, db)

            cmd.ExecuteNonQuery()

            MsgBox(pesan, MsgBoxStyle.Information + MsgBoxStyle.OkOnly, "konfirmasi")

            Call bersih()

            Call isitabel()

        Catch ex As Exception

            MessageBox.Show(ex.Message)

        End Try

    End Sub

    Sub showdb()

        rs.Read()

        NPM.Text = rs("npm")

        NM.Text = rs("nama")

        JNJNG.Text = rs("jenjang")

        JRSN.Text = rs("jurusan")

        rubahtombol(False, True, True, True, True)

        SMPN.Text = "Edit"

        NPM.Enabled = False

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Call opendb()

        Call bersih()

        Call buattabel()

        Call isitabel()

    End Sub

    Private Sub BR_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BR.Click

        Call bersih()

        NPM.Focus()

    End Sub

    Private Sub BTL_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BTL.Click

        Call bersih()

        NPM.Focus()

    End Sub

    Private Sub KLR_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KLR.Click

        End

    End Sub

    Private Sub HPS_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles HPS.Click

        Dim x As String

        x = MsgBox("anda yakin akan dihapus", MsgBoxStyle.Information + MsgBoxStyle.YesNo, "hapus")

        If x = vbYes Then

            Call prosesdb(2)

        End If

    End Sub

    Private Sub SMPN_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SMPN.Click

        If SMPN.Text = "Simpan" Then prosesdb(0) Else prosesdb(1)

    End Sub

    Private Sub NPM_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles NPM.KeyPress

        Dim tombol As Integer = Asc(e.KeyChar)

        If tombol = 13 Then

            Dim x As String

            If NPM.Text = "" Then

                MsgBox("isi NPM terlebih dahulu")

            Else

                sql = "select * from mahasiswa where NPM='" & NPM.Text & "'"

                cmd = New MySqlCommand(sql, db)

                rs = cmd.ExecuteReader

                Try

                    Call showdb()

                Catch ex As Exception

                    x = NPM.Text

                    bersih()

                    NPM.Text = x

                    rubahtombol(False, True, False, True, False)

                    SMPN.Text = "Simpan"

                End Try

                NM.Focus()

                rs.Close()

            End If

        End If

    End Sub

End Class

CARA PROSESNYA

Tombol SIMPAN

*Klik tombol BARU

 

*isi data seseuai yg di inginkan

*lalu klik tombol SIMPAN

 

Maka data akan tersimpan ke List view

 

TOMBOL HAPUS

*Isi kan NPM yang ada di dalam LIST VIEW

 

KEMUDIAN DI ENTER maka hasilnya

 

Lalu Klik data yang akan di hapus

 klik tombol HAPUS

Maka data yang ada di LIST VIEW akan terhapus

TOMBOL EDIT

*Isi kan NPM

 *Kemudian di ENTER

*Tekan TOMBOL EDIT

*Ganti data sesuai yang kita inginkan

 

 *Kemudian tekan TOMBOL EDIT

Maka data akan terganti 

TOMBOL BATAL

*Isi NPM

 

*Kemudian tekan ENTER

*Tekan TOMBOL BATAL

Maka prosesnya

TOMBOL  KELUAR

*Klik TOMBOLKELUAR

Sekian info dari saya. Selamat Mencobaaaa