private void ResetButton_Click(object sender, EventArgs e)
{
//this event handler resets the windows app when clicked
//and prompts the user before resetting
DialogResult userAnswer;
userAnswer = MessageBox.Show("Do you wish to Reset ?",
"Bill Estimator",
MessageBoxButtons.YesNo);
switch (userAnswer)
{
case DialogResult.Yes:
KwhTextBox1.Clear();
OffpeakKwhTextBox1.Clear();
CustomerTypecomboBox1.SelectedIndex = 0;
break;
case DialogResult.No:
//do nothing
break;
default:
KwhTextBox1.Clear();
CustomerTypecomboBox1.SelectedIndex = 0;
break;
}
eraseTextField();
}
//this method clears all input into the form
private void eraseTextField()
{
haveValidInput = true;
EstimatedBillLabel.Text = "Estimated Bill: ";
KwhLabel.Text = "How many Kwh?";
OffPeakKwhlabel.Visible = false;
OffpeakKwhTextBox1.Visible = false;
KwhTextBox1.Clear();
OffpeakKwhTextBox1.Clear();
accountNumberTextBox.Clear();
customerNameTextBox1.Clear();
}
//this event handler changes the form when the customer toggles between different customer types
//industrial users have peakhours and offpeak hours
//when an idustrial customer type is selected the forms toggles and dispays differently
private void CustomerTypecomboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
//when the user selects the Industrial customer type some labels and Text boxes become visible
switch (CustomerTypecomboBox1.Text)
{
case "Industrial":
KwhLabel.Text = "How many peak Kwh?";
OffPeakKwhlabel.Visible = true;
OffpeakKwhTextBox1.Visible = true;
break;
default:
KwhLabel.Text = "How many Kwh?";
OffPeakKwhlabel.Visible = false;
OffpeakKwhTextBox1.Visible = false;
break;
}
KwhTextBox1.Clear();
OffpeakKwhTextBox1.Clear();
}
private void PowerBillingSystem_Load(object sender, EventArgs e)
{
//open stream reader on "Customer txt" on load
string pathLocation = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
string filePath = Path.Combine(pathLocation, "Customer.txt");
//this block of code checks if the "Customer.txt" exist
//if the file does not exist a message box displays
//the program does'nt crash
if (File.Exists(filePath))
{
try
{
StreamReader output = new StreamReader(filePath);
while (!output.EndOfStream)
{
string lineFronline = output.ReadLine();
Customer c = new Customer(lineFronline);
customerListListBox.Items.Add(c.ToFormattedString());
//add customer names to this list
customerNames.Add(c.CustomerName);
//the following of code calculates the summary statistics
switch (c.CustomerType)
{
case "R":
totalResidentialCustomerCharge += c.ChargeAmount;
break;
case "C":
totalCommcercialCustomerCharge += c.ChargeAmount;
break;
case "I":
totalIndustrialCustomerCharge += c.ChargeAmount;
break;
default:
return;
}
calculateStatistics();
}
output.Close(); //after loading the file , close it
}catch (Exception excp)
{
MessageBox.Show($"File failed to load {excp.Message}");
return;
}
}
else
{
MessageBox.Show("Customer.txt does not exist in the bin/Debug folder");
return;
}
//on loading the form application residential customer type is set as default
//Focus is set to user input text box
CustomerTypecomboBox1.SelectedIndex = 0;
KwhTextBox1.Select();
}
