We will read the toppings file into lists. Declare the following variable lists in the location shown:
public partial class Form1 : Form { List<String> toppings = new List<String> { }; List<Double> costs = new List<Double> { }; List<CheckBox> chkToppings = new List<CheckBox> { }; public Form1() ...
Write the code to read the topping file
private void getToppings(String filename) { // Read one line at a time Example: sausage,2.00 String line; // Parts will have "sausage", "2.00" after spliting line. String[] parts; // "2.00" must be converted to double 2.00 Double cost,total=0.0; // Starting position for first checkbox is beneath cost int y = lblCost.Location.Y + lblCost.Width + 10; System.IO.StreamReader file =new System.IO.StreamReader(filename); // Read the file line by line. while ((line = file.ReadLine()) != null) { // split the line on the comma: "sausage,2.00" becomes parts[0]="sausage"; parts[1]="2.00"; parts = line.Split(','); // Add name to toppings. toppings.Add(parts[0]); // Get cost and add to list costs Double.TryParse(parts[1], out cost); costs.Add(cost); // Create a new check box and add it to the form and list CheckBox chk = new CheckBox(); // Add the new check box to the list: chkToppings.Add(chk); // Set the text of the check box. Example: Sausage $2.00 chk.Text =parts[0] + " "+cost.ToString("$0.00"); // Add the new chkbox to the controls on the form: this.Controls.Add(chk); // Position each checkbox so that it is under the previous one: chk.Location = new System.Drawing.Point(20, y); // Add the event for each check box so that when it is clicked the Control_click event is executed. chk.Click += new EventHandler(Control_Click); // Increment y so that the next check box is under this one. y += 30; } } private void Control_Click(object sender, EventArgs e) { // Click Event for all of the controls CalculateCost(); } private void CalculateCost() { // TO-DO later }
