agung Nim : 13150769 kelas : 13.6A.37
1. BILLING using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Diagnostics; namespace Billing_Application { public partial class Form1 : Form { private Stopwatch wkt = null ; public Form1() { InitializeComponent(); } private void button1_Click( object sender, EventArgs e) { if (textBox1.Text != "" ) { wkt = new Stopwatch (); if (button1.Text == "Log In" ) { label2.Visible = true ; wkt.Start(); button1.Text = "Stop" ; } else if (button1.Text == "Stop" ) { wkt.Stop(); if (wkt.Elapsed.TotalMinutes <= 30.00) { MessageBox .Show( "Jumlah tagihan anda sebesar Rp.1000" , "Total Tagihan" ); } else if (wkt.Elapsed.TotalHours <= 1.00) { MessageBox .Show( "Jumlah Tagihan anda sebesar Rp.2000" , "Total Tagihan" ); } wkt.Reset(); label2.Visible = false ; b...
