Visual C# Examples:
Georgetown Cleaning Services

1. Start a new Windows Application named GCS1
2. Set the form's icon to Drive:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Graphics\icons\Misc\BULLSEYE.ICO
3. Design the form as follows:
    

   Control Name Text Additional Properties GroupBox   Order Setup   Label   Customer Name:   TextBox txtCustName     Label   Order Date:   MaskedEdBox txtOrderDate   Format: dddd dd mmmm yyyy Mask: ##-##-## Label   Order Time:   MaskedEdBox txtOrderTime   Format: hh:mm AM/PM Mask: ##:## GroupBox   Order Processing   Label   Item Type   Label   Qty   Label   Unit Price   Label   Sub Total   Label   Shirts   TextBox txtQtyShirts 0 TextAlign: Right TextBox txtPriceShirts 0.95 TextAlign: Right TextBox txtTotalShirts 0.00 TextAlign: Right ReadOnly: True Label   Pants   TextBox txtQtyPants 0 TextAlign: Right TextBox txtPricePants 2.95 TextAlign: Right TextBox txtTotalPants 0.00 TextAlign: Right ReadOnly: True Label   Dresses   TextBox txtQtyDresses 0 TextAlign: Right TextBox txtPriceDresses 2.95 TextAlign: Right TextBox txtTotaldresses 4.55 TextAlign: Right ReadOnly: True Button btnCalculate Calculate   GroupBox   Order Summary   Label   Total Order   TextBox txtTotalOrder 0.00 TextAlign: Right ReadOnly: True Label   TaxRate   TextBox txtTaxRate 5.75 TextAlign: Right Label   %   Label   Tax Amount   TextBox txtTaxAmount 0.00 TextAlign: Right ReadOnly: True Label   Net Price   TextBox txtNetPrice 0.00 TextAlign: Right ReadOnly: True Button btnClose Close

4. Save All
5. On the main menu, click File -> New -> File...
6. In the New File dialog box, double-click Icon File
7. Right-click a white area in the drawing section, position the mouse on Current Icon Image Types, and click 16x16, 16 Colors
8. Save it as Calculate in the main folder of the current project
9. Change its design as follows:
    
   
10. Right-click a white area in the drawing section, position the mouse on Current Icon Image Types, and click 32x32, 16 Colors
11. Right-click a white area in the drawing section and click Delete Image Type
12. Save the icon
13. On the main menu, click Project -> Add New Item...
14. In the Add New Item dialog box, click Icon File
15. Change the name to SubTotal and click Open
16. Right-click a white area in the drawing section, position the mouse on Current Icon Image Types, and click 16x16, 16 Colors
17. Change its design as follows:
     
    
18. Right-click a white area in the drawing section, position the mouse on Current Icon Image Types, and click 32x32, 16 Colors
19. Right-click a white area in the drawing section and click Delete Image Type
20. Save the icon
21. Add three buttons inside the lower-left group box and delete the content of their Text property
22. Complete the design of the form as follows:
     

    Button Name Image ImageAlign TextAlign btnShirts SubTotal     btnPants SubTotal     btnDresses SubTotal     btnCalculate Calculate TopCenter BottomCenter

23. On the main menu, click View Tab Order and click the controls in the following order (observe the sequence in the Order Processing group box)
     
    
24. Save all
25. Double-click the button for the shirts and implement its Click event as follows:
     

    private void btnShirts_Click(object sender, System.EventArgs e) { int quantity = 1; double unitPrice = 0.00, subTotal; // Retrieve the number of this item // Just in case the user types an invalid value, we are using a try...catch try { quantity = int.Parse(this->txtQtyShirts->Text); } catch(FormatException) { MessageBox::Show("The value you entered for the number of shirts is not valid" + "\nPlease try again"); } // Retrieve the unit price of this item // Just in case the user types an invalid value, we are using a try...catch try { unitPrice = double.Parse(this->txtPriceShirts->Text); } catch(FormatException) { MessageBox::Show("The value you entered for the price of shirts is not valid" + "\nPlease try again"); } // Calculate the sub-total for this item subTotal = quantity * unitPrice; // Display the sub-total in the corresponding text box this->txtTotalShirts->Text = subTotal.ToString("F"); }

26. Double-click the button for the pants and implement its Click event as follows:
     

    private void btnPants_Click(object sender, System.EventArgs e) { int quantity = 1; double unitPrice = 0.00, subTotal; try { quantity = int.Parse(this->txtQtyPants->Text); } catch(FormatException) { MessageBox::Show("The value you entered for the number of pants is not valid" + "\nPlease try again"); } try { unitPrice = double.Parse(this->txtPricePants->Text); } catch(FormatException) { MessageBox::Show("The value you entered for the price of pants is not valid" + "\nPlease try again"); } subTotal = quantity * unitPrice; this->txtTotalPants->Text = subTotal.ToString("F"); }

27. Double-click the button for the dresses and implement its Click event as follows:
     

    private void btnDresses_Click(object sender, System.EventArgs e) { int quantity = 1; double unitPrice = 0.00, subTotal; try { quantity = int.Parse(this->txtQtyDresses->Text); } catch(FormatException) { MessageBox::Show("The value you entered for the number of dresses is not valid" + "\nPlease try again"); } try { unitPrice = double.Parse(this->txtPriceDresses->Text); } catch(FormatException) { MessageBox::Show("The value you entered for the price of dresses is not valid" + "\nPlease try again"); } subTotal = quantity * unitPrice; this->txtTotalDresses->Text = subTotal.ToString("F"); }

28. Double-click the Calculate button and implement its Click event as follows:
     

    private void btnCalculate_Click(object sender, System.EventArgs e) { double priceShirts, pricePants, priceDresses, totalOrder; double taxRate = 0.00, taxAmount; double netPrice; // Retrieve the value of the sub-total for each category of items priceShirts = double.Parse(this->txtTotalShirts->Text); pricePants = double.Parse(this->txtTotalPants->Text); priceDresses = double.Parse(this->txtTotalDresses->Text); // Calculate the total totalOrder = priceShirts + pricePants + priceDresses; // Retrieve the value of the tax rate try { taxRate = double.Parse(this->txtTaxRate->Text); } catch(FormatException) { MessageBox::Show("The tax rate you entered is invalid" + "\nPlease try again"); } // Calculate the amount owed for the taxes taxAmount = totalOrder * taxRate / 100; // Add the tax amount to the total order netPrice = totalOrder + taxAmount; // Display the values of the order summary this->txtTotalOrder->Text = totalOrder.ToString("C"); this->txtTaxAmount->Text = taxAmount.ToString("C"); this->txtNetPrice->Text = netPrice.ToString("C"); }

29. Double-click the Close button and implement its Click event as follows:
     

    private void btnClose_Click(object sender, System.EventArgs e) { Close(); }

30. Execute the application to test the form. In the Order Date text box, type 081103 and in the Order Time, type 0728 then complete the rest of the order
     
    
31. Close the form and return to your programming environment