//Below event of clicking Add Customer button adds customer in the list, calculates total bill amt of customer by their type, count total # of customer and calculate total bill of all customers in list
private void btnAddCustomer_Click(object sender, EventArgs e)
{
Customer c = null;
if (Validator.IsProvided(txtCustName, "Customer Name") && Validator.IsProvided(txtCustName, "Account Number") && Validator.IsNonNegativeInt(txtAccountNo, "Account Number") && Validator.IsUnique(txtAccountNo, "Account#", lstCustomers))
{
if (rdResidential.Checked)
{
c = new Residential(txtCustName.Text, Convert.ToInt32(txtAccountNo.Text), 'R'); //creating Residential customer object
c.CustomerCharge = c.calculateBill(int.Parse(txtKwh.Text)); //Calculatinga a bill amt of Residential customer
res += c.CustomerCharge; //Adding new bill charge of residential customer to the existing bill amount of Residential customers
txtResidentialType.Text = res.ToString("c");
}
if (rdCommercial.Checked)
{
c = new Commercial(txtCustName.Text, Convert.ToInt32(txtAccountNo.Text), 'C'); // creating Commercial customer object
c.CustomerCharge = c.calculateBill(int.Parse(txtKwh.Text)); //Calculatinga a bill amt of Commercial customer
com += c.CustomerCharge; //Adding new bill charge of Commercial customer to the existing bill amount of Commercial customers
txtCommercialType.Text = com.ToString("c");
}
if (rdIndustrial.Checked)
{
c = new Industrial(txtCustName.Text, Convert.ToInt32(txtAccountNo.Text), 'I'); // creating Industrial customer object
c.CustomerCharge = c.calculateBill(int.Parse(txtOnPeak.Text), (int.Parse(txtOffPeak.Text))); //Calculating a bill amt of Industrial customer
ind += c.CustomerCharge; //Adding new bill charge of industrial customer to the existing bill amount of industrial customers
txtIndutrialType.Text = ind.ToString("c");
}
customerList.Add(c);
DisplayCustomers();
}
}
public void CommercialBill() //Testing if usage is >1000 kwh for commercial customer
{
//arrange
int initial = 2000;
double expectedbill = 105;
double actualBill;
Commercial c; //ref of commercial class
//act
c = new Commercial("Birju", 123, 'C');
actualBill = c.calculateBill(initial, 0); //calling the method to calculate bill for commercial customer to test actual bill against expected bill
//assert
Assert.AreEqual(actualBill, expectedbill);
}
private void btnCalculate_Click(object sender, EventArgs e)
{
//Residential Customer energy bill Calculation when residental customer radio button is selected
if (rdResidential.Checked == true)
{
if (Validator.IsProvided(txtKwh, "Energy Usage") && Validator.IsNonNegativeInt(txtKwh, "Energy usage") && Validator.IsNonNegativeDbl(txtKwh, "usage"))
{
Customer c = new Residential(null, 0, '0'); //passing null and 0 in the constructors as we don't want to save the object in the list yet
int input = Convert.ToInt32(txtKwh.Text); //converting user input into integer
double restotalBill = c.calculateBill(input); //calling the function which calculates residential bill
txtChargeAmt.Text = restotalBill.ToString("c"); //displaying result with $ currancy
}
}
//Commercial customer energy bill calculation when commercial customer radio button is selected
if (rdCommercial.Checked == true)
{
if (Validator.IsProvided(txtKwh, "Energy Usage") && Validator.IsNonNegativeInt(txtKwh, "Energy usage") && Validator.IsNonNegativeDbl(txtKwh, "usage"))
{
Customer c = new Commercial(null, 0, '0'); //passing null and 0 in the constructors as we don't want to save the object in the list yet
int input = Convert.ToInt32(txtKwh.Text); //converting user input into integer
double comtotalBill = c.calculateBill(input); //calling the function which calculates commercial bill
txtChargeAmt.Text = comtotalBill.ToString("c"); //displaying result with $ currancy
}
}
//Industrial customer energy bill calculation when indutrial customer radio button is selected
if (rdIndustrial.Checked == true)
{
if (Validator.IsProvided(txtOnPeak, "Energy Usage") && Validator.IsNonNegativeInt(txtOnPeak, "Energy usage") && Validator.IsNonNegativeDbl(txtOnPeak, "Energy usage") &&
Validator.IsProvided(txtOffPeak, "Energy Usage") && Validator.IsNonNegativeInt(txtOffPeak, "Energy usage") && Validator.IsNonNegativeDbl(txtOffPeak, "Energy usage"))
{
Customer c = new Industrial(null, 0, '0'); //passing null and 0 in the constructors as we don't want to save the object in the list yet
int onpeak = Convert.ToInt32(txtOnPeak.Text); //converting user input into integer
int offpeak = Convert.ToInt32(txtOffPeak.Text); //converting user input into integer
double indTotalBill = c.calculateBill(onpeak, offpeak); //calling the function which calculates industrial bill
txtChargeAmt.Text = indTotalBill.ToString("c"); //displaying result with $ currancy
}
}
}