C sharp sample code

1. Page 1
Add to order button
private void addToOrderButton_Click(object sender, EventArgs e) {
// Add the current item price and quantity to the order.
if (noSizeRadioButton.Checked) {
MessageBox.Show("You must select a drink and size.",
"Missing required entry"); }
else {
try {
int quantityInteger = int.Parse(quantityTextBox.Text);
if (quantityInteger > 0) {
drinksInteger += quantityInteger;
totalOrderDecimal += drinkDecimal * quantityInteger;
clearForNextItem();
orderCompleteButton.Enabled = true; }
else {
MessageBox.Show("Please enter a quantity",
"Missing Required Entry"); } }
catch (FormatException) {
MessageBox.Show("Invalid Quantity", "Data Entry Error");
quantityTextBox.Focus();
quantityTextBox.SelectAll(); } } }
Order Complete
private void orderCompletebutton_Click(object sender, EventArgs e)
{
// Order is complete, add to summary and clear order.
// Check if the last item was added to the total.
if (itemPriceTextBox.Text != "")
{
DialogResult responseDialogResult;
string messageString = "Current item not recorded. Add to order?";
responseDialogResult = MessageBox.Show(messageString,
"Verify Last Drink Purchase", MessageBoxButtons.YesNo,
MessageBoxIcon.Question);
if (responseDialogResult == DialogResult.Yes)
{
addToOrderButton_Click(sender, e); } }
Page 2
// Display amount due.
string dueString = "Amount Due " + totalOrderDecimal.ToString("C");
MessageBox.Show(dueString, "Order Complete");
// Add to summary totals.
ordersInteger++;
totalSalesDecimal += totalOrderDecimal;
// Reset all for new order.
summaryButton.Enabled = true;
summaryToolStripMenuItem.Enabled = true;
orderCompleteButton.Enabled = false;
orderCompleteToolStripMenuItem.Enabled = false;
totalOrderDecimal = 0m;
}
Summary Button
private void summaryButton_Click(object sender, EventArgs e)
{
// Display the summary information in a message box.
string summaryString = "Drinks Sold: " + drinksInteger.ToString()
+ "nn" + "Number of Orders: " + ordersInteger.ToString()
+ "nn" + "Total Sales: " + totalSalesDecimal.ToString("C");
MessageBox.Show(summaryString, "Juice Bar Sales Summary",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
private void exitButton_Click(object sender, EventArgs e)
{
// End the application.
this.Close();
}
Twelve Ounce Radio Button
private void twelveOunceRadioButton_CheckedChanged(object sender, EventArgs e)
{
// Calculate and display the price for the selected item.
// Handles all check boxes and radio buttons.
// Cast the sender to a RadioButton type.
RadioButton selectedSizeRadioButton = (RadioButton)sender;
switch (selectedSizeRadioButton.Name)

2. Page 3
{
case "twelveOunceRadioButton":
itemSizeDecimal = 3m;
break;
case "sixteenOunceRadioButton":
itemSizeDecimal = 3.5m;
break;
case "twentyOunceRadioButton":
itemSizeDecimal = 4m;
break;
}
drinkDecimal = itemSizeDecimal + findExtrasPrice();
itemPriceTextBox.Text = drinkDecimal.ToString("C");
}
private void clearForNextItem()
{
// Clear radio buttons, check boxes, text boxes.
noSizeRadioButton.Checked = true;
fruitJuiceRadioButton.Checked = true;
vitaminPackCheckBox.Checked = false;
energyBoosterCheckBox.Checked = false;
ladiesCheckBox.Checked = false;
itemPriceTextBox.Clear();
quantityTextBox.Text = "1";
}
private decimal findExtrasPrice()
{
// Find price for additives.
decimal extrasDecimal = 0m;
if (vitaminPackCheckBox.Checked)
extrasDecimal += .5m;
if (energyBoosterCheckBox.Checked)
extrasDecimal += .5m;
if (ladiesCheckBox.Checked)
extrasDecimal += .5m;
return extrasDecimal;
}
private void vitaminPackCheckBox_CheckedChanged(object sender, EventArgs e)
Page 4
{
// Check price of additives and display current price.
// Handles all three check boxes.
drinkDecimal = itemSizeDecimal + findExtrasPrice();
itemPriceTextBox.Text = drinkDecimal.ToString("C");
}
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
// Display information in a message box.
string aboutString = "Programmed by A. ProgrammernVersion 1.1";
string captionString =
"About Look Sharp Fitness Center Juice Bar Orders";
MessageBox.Show(aboutString, captionString);
}
private void fontToolStripMenuItem_Click(object sender, EventArgs e)
{
// Change the label’s font.
// Initialize the dialog box.
fontDialog1.Font = titleLabel.Font;
// Display the dialog box.
fontDialog1.ShowDialog();
// Assign the new font.
titleLabel.Font = fontDialog1.Font;
}
private void colorToolStripMenuItem_Click(object sender, EventArgs e)
{
// Change the form’s ForeColor.
// Applies to all controls on the form that haven’t had their
// ForeColor explicitly modified.
// Initialize the dialog box.
colorDialog1.Color = this.ForeColor;
// Display the dialog box.
colorDialog1.ShowDialog();
// Assign the new color.
this.ForeColor = colorDialog1.Color;
}
}
}