Modul Praktik Pemrograman Komputer II Pengolahan DATABASE Berbasis MYSQL Menggunakan Bahasa Pemrograman Microsoft Visual C Express

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Ridwan Setiawan
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1 Modul Praktik Pemrograman Komputer II Pengolahan DATABASE Berbasis MYSQL Menggunakan Bahasa Pemrograman Microsoft Visual C Express disusun oleh : TIM LABORATORIUM KOMPUTASI PROGRAM DIPLOMA TEKNIK MESIN SEKOLAH VOKASI UGM 2013

2 Menggunakan Bahasa Pemrograman Microsoft Visual C 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);

3 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

4 //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

5 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 (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

6 2. Membuka MySQL Front 3. Membuat Database dan Tabel

7 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)

8 UPDATE tbl_sparepart set stok = 0 where id =... UPDATE tbl_sparepart set nama = 'xxx' where id = 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.

9 1. Step-step akses DB lewat VC 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^

10 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.

11 //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();

12 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 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())

13 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);

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