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 if if if
(comboBox1->SelectedIndex (comboBox1->SelectedIndex (comboBox1->SelectedIndex (comboBox1->SelectedIndex
== == == ==
0) 1) 2) 3)
c=a+b; c=a-b; c=a*b; c=a/b;
//untuk listBox if if if if
(listBox1->SelectedIndex (listBox1->SelectedIndex (listBox1->SelectedIndex (listBox1->SelectedIndex
//untuk radioButton if (radioButton1->Checked) if (radioButton2->Checked) if (radioButton3->Checked) if (radioButton4->Checked)
== == == ==
0) 1) 2) 3)
c=a+b; c=a-b; c=a*b; c=a/b;
c=a+b; c=a-b; c=a*b; 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^ float a,b,c; a=Convert::ToDouble(textBox1->Text);
sender, System::EventArgs^
e){
if (a>0)label4->Text = "Positif"; if (a<0)label4->Text = "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); } }
