private void btnHitung_Click(object sender, EventArgs e)
{
// objek form entry data calculator
EntryCalculator entry = new EntryCalculator();
// mendaftarkan method event handler utk merespon event OnCreate (subscribe)
entry.OnCreate += Entry_OnCreate;
// tampilkan form entry calculator
entry.ShowDialog();
}
// method event handler untuk merespon event OnCreate,
// ketika di panggil dari form entry calculator
private void Entry_OnCreate(int index, double nilaiA, double nilaiB)
{
var calculator = new EntryCalculator();
switch (index)
{
case 0:
lsbHasil.Items.Add(string.Format("Hasil Penambahan {0} + {1} = {2}", nilaiA, nilaiB, calculator.Penambahan(nilaiA, nilaiB)));
break;
case 1:
lsbHasil.Items.Add(string.Format("Hasil Pengurangan {0} - {1} = {2}", nilaiA, nilaiB, calculator.Pengurangan(nilaiA, nilaiB)));
break;
case 2:
lsbHasil.Items.Add(string.Format("Hasil Perkalian {0} * {1} = {2}", nilaiA, nilaiB, calculator.Perkalian(nilaiA, nilaiB)));
break;
case 3:
lsbHasil.Items.Add(string.Format("Hasil Pembagian {0} / {1} = {2}", nilaiA, nilaiB, calculator.Pembagian(nilaiA, nilaiB)));
break;
}
}