The form load event will laod the topping file if it exists. If not, it displays a message box. It would be nice to lett the user select a file if the default one doesn't exist.
private void Form1_Load(object sender, EventArgs e) { // Load the toppings from the file. String fileName = @"c:\mydata\pizzatoppings.txt"; // Include using System.IO; to use File.Exists. if (File.Exists(fileName)) getToppings(fileName); else MessageBox.Show(fileName + " Not Found", "No toppings available", MessageBoxButtons.OK); // To do: Let the user select a file. // Add the click event for every control on the form. foreach (Control ctrl in this.Controls) { ctrl.Click += new EventHandler(Control_Click); } // Show cost at start for default size. CalculateCost(); } private void Control_Click(object sender, EventArgs e) { // This event handles the click event for every control on the form. CalculateCost(); } private void CalculateCost() { // TO-DO later }
To do: If the topping file is missing, let the user select one.
