Modul Prokom2

Modul Praktik Pemrograman Komputer II

Pengolahan DATABASE Berbasis MYSQL Menggunakan Bahasa Pemrograman Microsoft Visual C++ 2010 Express

disusun oleh : TIM LABORATORIUM KOMPUTASI

PROGRAM DIPLOMA TEKNIK MESIN

SEKOLAH VOKASI UGM

2013

Menggunakan Bahasa Pemrograman Microsoft Visual C++ 2010 Express

1. Membuat Project Baru

Pilih New Project

2. Menggunakan Label,textBox,Button

private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) { float a,b,c; a=Convert::ToDouble(textBox1->Text); b=Convert::ToDouble(textBox2->Text); c=a+b; label5->Text = Convert::ToString(c); textBox3->Text = Convert::ToString(c); }

3. Menggunakan ComboBox,ListBox,GroupBox,RadioButton,CeckBox

//untuk comboBox

if (comboBox1->SelectedIndex == 0) c=a+b; if (comboBox1->SelectedIndex == 1) c=a-b; if (comboBox1->SelectedIndex == 2) c=a*b; if (comboBox1->SelectedIndex == 3) c=a/b;

//untuk listBox

if (listBox1->SelectedIndex == 0) c=a+b; if (listBox1->SelectedIndex == 1) c=a-b; if (listBox1->SelectedIndex == 2) c=a*b; if (listBox1->SelectedIndex == 3) c=a/b; //untuk radioButton if (radioButton1->Checked) c=a+b; if (radioButton2->Checked) c=a-b; if (radioButton3->Checked) c=a*b; if (radioButton4->Checked) c=a/b; //untuk checkBox

if (checkBox1->Checked) if (checkBox1->Checked) // untuk tombol Hapus

textBox1->Text=""; textBox2->Text=""; textBox3->Text=""; label5->Text="xxxxxxxxxx"; comboBox1->SelectedIndex=-1; listBox1->SelectedIndex=-1;

4. Menggunakan MassageBox

private: virtual System::Void button1_Click(System::Object^ sender, System::EventArgs^ e){ float a,b,c; a=Convert::ToDouble(textBox1->Text); if (a>0)label4->Text = "Positif"; if (aText = "Negatif"; if (a==0)MessageBox::Show("Input tdk boleh nol !!"); }

Membuat Database Menggunakan MySQL Server 5.5 dan MySQL Front

1. Membuka MySQL Server 5.5

2. Membuka MySQL Front

3. Membuat Database dan Tabel

Perintah-perintah yang digunakan :

1. Untuk Melihat Data (SELECT)

SELECT * FROM tbl_sparepart

SELECT (nama) FROM tbl_sparepart

SELECT (nama,stok) FROM tbl_sparepart

SELECT * FROM tbl_sparepart order by nama

SELECT * FROM tbl_sparepart order by stok

SELECT * FROM tbl_sparepart where nama like '%olie'

SELECT * FROM tbl_sparepart where id >= 5

SELECT COUNT(nama) FROM tbl_sparepart

SELECT MAX(stok) FROM tbl_sparepart

SELECT MIN(stok) FROM tbl_sparepart

SELECT AVG(stok) FROM tbl_sparepart

2. Untuk Meng-Update Data (UPDATE)

UPDATE tbl_sparepart set stok = 0 where id = ...

UPDATE tbl_sparepart set nama = 'xxx' where id = ...

3. Untuk Menambah Data (INSERT)

INSERT INTO tbl_sparepart(nama,stok) values('olie curah', 500)

4. Untuk Menghapus Data (DELETE)

DELETE FROM tbl_sparepart where id = 1

Pengolahan DATABASE

1. Step-step akses DB lewat VC++ 2010 a. Step koneksi

1. Tambahkan reference ke MySql.Data ke Project Anda

2. Tambahkan namespace MySql, yaitu : using namespace MySql::Data::MySqlClient;

3. Siap membuat program

a. string utk parameter DB

- nama_db

- alamat db

- port db

- username

- password

Contoh : String^ nama_object =L"database=

db_toko;datasource=localhost;port=3306;username=root;password=" ;

String^ xxx = L"database=db_toko;datasource=localhost;port=3306;username=root;password=" ;

b. Mendeklarasikan object MySqlConnection

Contoh : MySqlConnection^ nama_object = gcnew

MySqlConnection(nama_variabel_berisi_parameter_db);

MySqlConnection^ yyy= gcnew MySqlConnection(xxx);

c. Mendeklarasikan object MySqlCommand

Contoh : MySqlCommand^ nama_object = gcnew

MySqlCommand("perintah_sql_query",nama_object_MySqlConnection);

MySqlCommand^ nnn = gcnew MySqlCommand("select id from tbl_user",yyy);

d. Mendeklarasikan object MySqlDataReader

Contoh : MySqlDataReader^ nama_object;

MySqlDataReader^ myReader;

e. Open Koneksi

Contoh : konek->Open() ;

Perintah-perintah DB harus ditampung dalam Error Exception yaitu :

try

{

//perintah-perintah yg bisa dieksekusi

yyy->Open(); myReader=nnn->ExecuteReader(); MessageBox::Show("Koneksi Sukses");

} catch(Exception^ ex)

{

//error yg terjadi MessageBox::Show(ex->Message);

}

f. Eksekusi perintah

Contoh : myReader=cmd->ExecuteReader();

g. Menampung hasil eksekusi

while(myReader->Read())

{

//ambil data di kolom 1 (id) dalam int

textBox1->Text += (myReader->GetInt32(0).ToString()) ;

}

h. Close Koneksi

yyy->Close();

private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) { String^ xxx = L"database=db_toko;datasource=localhost;port=3306;username=root;password=" ; MySqlConnection^ yyy= gcnew MySqlConnection(xxx); MySqlCommand^ nnn = gcnew MySqlCommand("select * from tbl_user",yyy); MySqlDataReader^ myReader; try { yyy->Open();

myReader=nnn->ExecuteReader(); MessageBox::Show("Koneksi Sukses"); while(myReader->Read()) { textBox1->Text += (myReader->GetInt32(id).ToString()) ; comboBox1->Items->Add(myReader->GetString(0)); listBox1->Items->Add(myReader->GetInt32(0).ToString()) ; listBox2->Items->Add(myReader->GetString(nama)); listBox3->Items->Add(myReader->GetString(2)); } yyy->Close(); } catch(Exception^ ex) { MessageBox::Show(ex->Message); } }

2. Manage Database Lewat VC++ 2010

private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) { String^ xxx = L"database=db_toko;datasource=localhost;port=3306;username=root;password=" ; MySqlConnection^ yyy= gcnew MySqlConnection(xxx); MySqlCommand^ nnn = gcnew MySqlCommand("insert into tbl_sparepart(nama,STOK,harga) values('" + this->textBox1->Text + "','"+ this->textBox2->Text +"','"+ this->textBox3->Text +"') ; ",yyy); MySqlDataReader^ myReader; try {

yyy->Open(); myReader=nnn->ExecuteReader(); MessageBox::Show("Saved") ; while(myReader->Read()) {

} } catch(Exception^ ex) { MessageBox::Show(ex->Message); } } private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) { String^ xxx = L"database=db_toko;datasource=localhost;port=3306;username=root;password=" ; MySqlConnection^ yyy= gcnew MySqlConnection(xxx); MySqlCommand^ nnn = gcnew MySqlCommand("select * from tbl_sparepart where nama like '%" + textBox4->Text + "%';" ,yyy); MySqlDataReader^ myReader; try { yyy->Open(); myReader=nnn->ExecuteReader(); while(myReader->Read()) { comboBox1->Items->Add(myReader->GetString(1)); } } catch(Exception^ ex) { MessageBox::Show(ex->Message); } }