EBK STARTING OUT WITH VISUAL C#
4th Edition
ISBN: 9780134400433
Author: GADDIS
Publisher: PEARSON
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Chapter 4, Problem 5PP
Program Plan Intro
Distance converter
Program plan:
Design the form:
- • Place a one text boxes control on the form, and change its name and properties to get the distance from the user.
- • Place a three label boxes control on the form, and change its name and properties.
- • Place a two group boxes control on the form, and change its name and properties.
- • Place a two list boxes control on the form, and change its name and properties to list of items.
- • Place a command button on the form, and change its name and properties to convert distance and then display it.
- • Place a command button on the form, and change its name and properties to end the application.
In code window, write the code:
Program.cs:
- • Include the required libraries.
- • Define the namespace “DistanceConverter”.
- ○ Define a class “Program”.
- ■ Define a constructor for the class.
- ■ Define required functions to run “Form1”.
- ○ Define a class “Program”.
Form1.cs:
- • Include the required libraries.
- • Define namespace “DistanceConverter”.
- ○ Define a class “Form1”.
- ○ In btnConvert() method,
- ■ Declare the required variables.
- ■ Check whether selected index for From list and To list is not equal to “-1”. If yes, display the result.
- ■ Otherwise, check whether From list is equal to “Yards” and To list is equal to “Feet”. If yes, calculate the distance in feet and display the result.
- ■ Otherwise, check whether From list is equal to “Feet” and To list is equal to “Yards”. If yes, calculate the distance in yards and display the result.
- ■ Otherwise, check whether From list is equal to “Yards” and To list is equal to “Inches”. If yes, calculate the distance in inches and display the result.
- ■ Otherwise, check whether From list is equal to “Inches” and To list is equal to “Yards”. If yes, calculate the distance in yards and display the result.
- ■ Otherwise, check whether From list is equal to “Feet” and To list is equal to “Inches”. If yes, calculate the distance in inches and display the result.
- ■ Otherwise, check whether From list is equal to “Inches” and To list is equal to “Feet”. If yes, calculate the distance in feet and display the result.
- ○ In btnClose() method,
- ■ Close the application.
Form Design:
View the Form Design in IDE.
Set the Form Control properties in Properties window as follows:
| Object | Property | Setting |
| Form1 | Text | Distance Converter |
| label1 | Text | Enter a distance to convert: |
| label2 | Text | Converted Distance: |
| lblResult | Text | (Empty) |
| textBox1 | Text | (Empty) |
| groupBox1 | Text | From |
| groupBox1 | Text | To |
| From | Items | |
| (Collection) | Inches | |
| Feet | ||
| Yards | ||
| To | Items | |
| (Collection) | Inches | |
| Feet | ||
| Yards | ||
| btnConvert | Text | Convert |
| btnExit | Text | Exit |
- • Add three label box controls to the form from Toolbox.
- • Add one text box to the form from Toolbox.
- • Add two group boxes to the form from Toolbox.
- • Add two list boxes to the form from Toolbox.
- • Add two command boxes to the form from Toolbox.
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