EBK STARTING OUT WITH VISUAL C#
5th Edition
ISBN: 9780135204818
Author: GADDIS
Publisher: VST
expand_more
expand_more
format_list_bulleted
Expert Solution & Answer
Chapter 4, Problem 10SA
Explanation of Solution
List boxes:
List box controls help to show the list of items which enables the user to choose an item from the list.
- • The user may choose one of the items from the list, causing the item to appear selected at runtime.
- • The selected items will be displayed on ListBox control.
Get the items from ListBox control:
The item which is selected by user from ListBox is stored into ListBox’s SelectedItem property.
Steps to determine the selected item in Listbox:
- • If anyone tries to get the value when ListBox’s SelectedItem is empty, then it will occur with an exception.
- ○ To prevent this type of exception with help of “SelectedIndex” property...
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Assume nameListBox is a ListBox control. Write code that reads the selected item from the ListBox. Be sure to prevent an exception from occurring in case no item has been selected.
Adding Students to a Club Create an application that displays a list of student names in a ListBox. Use a second empty ListBox to represent the members of a student club. Use a button labeled Addto copy member names from the general list to the club list. Use a button labeled Remove to remove a student from the club list. Keep a running count of the number of names in the club list. The application should perform the following error-checking:• Do not permit the same person’s name to be added twice.• Avoid throwing an exception if the user clicks the Add button before having selected a student name.• Avoid a runtime error if the user clicks the Remove selected member button, without having selected a member name
In "Starting out with visual basic 8th edition programming challenge 5"
State True/False: When a set initialized with a specific value more than once, an error message will be printed.
True
False
Chapter 4 Solutions
EBK STARTING OUT WITH VISUAL C#
Ch. 4.1 - What is a control structure?Ch. 4.1 - What is a decision structure?Ch. 4.1 - Prob. 4.3CPCh. 4.1 - Prob. 4.4CPCh. 4.1 - What types of relationships between numeric values...Ch. 4.1 - Write an if statement that determines whether the...Ch. 4.1 - Write an if statement that determines whether the...Ch. 4.2 - Prob. 4.8CPCh. 4.2 - In an if-else statement, under what circumstances...Ch. 4.2 - Write an if-else statement that works like this:...
Ch. 4.3 - Convert the following set of nested if-else...Ch. 4.4 - Prob. 4.12CPCh. 4.4 - Prob. 4.13CPCh. 4.4 - Assume the variables a = 2, b = 4, and c = 6....Ch. 4.4 - Explain how short-circuit evaluation works with...Ch. 4.4 - Write an if statement that displays the message...Ch. 4.4 - Write an if statement that displays the message...Ch. 4.5 - Prob. 4.18CPCh. 4.5 - Prob. 4.19CPCh. 4.6 - If the following code were part of a complete...Ch. 4.6 - If the following code were part of a complete...Ch. 4.7 - Prob. 4.22CPCh. 4.7 - If a TryParse method successfully converts the...Ch. 4.7 - Prob. 4.24CPCh. 4.7 - Prob. 4.25CPCh. 4.9 - Prob. 4.26CPCh. 4.9 - If several CheckBox controls have been created in...Ch. 4.9 - Prob. 4.28CPCh. 4.10 - Convert the following if-else-if code to a switch...Ch. 4.11 - Prob. 4.30CPCh. 4.11 - Prob. 4.31CPCh. 4.11 - Prob. 4.32CPCh. 4 - A __________ structure executes a set of...Ch. 4 - A __________ structure provides one alternative...Ch. 4 - A(n) __________ expression has a value of either...Ch. 4 - The symbols , , and == are all __________...Ch. 4 - A __________ structure tests a condition and then...Ch. 4 - You use a(n) __________ statement to write a...Ch. 4 - You use a(n) __________ statement to write a dual...Ch. 4 - A ____________ decision structure is written...Ch. 4 - , ||, and ! are __________ operators. a....Ch. 4 - A compound Boolean expression created with the...Ch. 4 - A compound Boolean expression created with the...Ch. 4 - The __________ operator takes a Boolean expression...Ch. 4 - A __________ is a Boolean variable that signals...Ch. 4 - Prob. 14MCCh. 4 - Prob. 15MCCh. 4 - Prob. 16MCCh. 4 - The __________ section of a switch statement is...Ch. 4 - A ListBoxs index numbering starts at __________....Ch. 4 - You can use the __________ property to determine...Ch. 4 - The __________ property holds the item that is...Ch. 4 - Prob. 1TFCh. 4 - A single-alternative decision structure tests a...Ch. 4 - The if-else statement is a dual-alternative...Ch. 4 - A decision structure can be nested inside another...Ch. 4 - A compound Boolean expression created with the ...Ch. 4 - Prob. 6TFCh. 4 - Multiple CheckBox controls in the same GroupBox...Ch. 4 - The test expression in a switch statement can be a...Ch. 4 - If an item is not selected in a ListBox, the...Ch. 4 - Prob. 10TFCh. 4 - What is meant by the term conditionally executed?Ch. 4 - You need to test a condition and then execute one...Ch. 4 - Briefly describe how the operator works.Ch. 4 - Briefly describe how the || operator works.Ch. 4 - Prob. 5SACh. 4 - What is a flag and how does it work?Ch. 4 - What are the two arguments that you pass to a...Ch. 4 - How do you determine in code whether a RadioButton...Ch. 4 - Prob. 9SACh. 4 - Prob. 10SACh. 4 - Write an if statement that assigns 20 to the...Ch. 4 - Write an if statement that assigns 0 to the...Ch. 4 - Write an if-else statement that assigns 0 to the...Ch. 4 - Write nested decision structures that perform the...Ch. 4 - Write an if-else statement that displays Speed is...Ch. 4 - Write an if-else statement that determines whether...Ch. 4 - Prob. 7AWCh. 4 - Rewrite the following if-else-if statement as a...Ch. 4 - Prob. 9AWCh. 4 - Roman Numeral Converter Create an application that...Ch. 4 - Mass and Weight Scientists measure an objects mass...Ch. 4 - Magic Dates The date June 10, 1960, is special...Ch. 4 - Color Mixer The colors red, blue, and yellow are...Ch. 4 - Prob. 5PPCh. 4 - Book Club Points Serendipity Booksellers has a...Ch. 4 - Software Sales A software company sells a package...Ch. 4 - Body Mass Index Program Enhancement In Programming...Ch. 4 - Change for a Dollar Game Create a change-counting...Ch. 4 - Fat Percentage Calculator One gram of fat has 9...Ch. 4 - Time Calculator Create an application that lets...Ch. 4 - Workshop Selector The following table shows a...
Knowledge Booster
Similar questions
- PYTHON: In this assignment, you will use all of the graphics commands you have learned to create an animated scene. Your program should have a clear theme and tell a story. You may pick any school-appropriate theme that you like. The program must include a minimum of: 5 circles 5 polygons 5 line commands 2 for loops 1 global variable You may wish to use the standard code for simplegui graphics below: import simplegui def draw_handler(canvas): frame = simplegui.create_frame('Testing', 600, 600) frame.set_canvas_background("Black") frame.set_draw_handler(draw_handler) frame.start()arrow_forwardwoulb you please help me work on this program C# visual Studio. Given the following: Listbox Name: lstDemo private void btnDisplay_Click(object sender, EventArgs e){ //Your code goes here }Using a for loop code the statements that will display the values below in the above listbox with each one on a new line. Use the btnDisplay_Click event to place you code in. The output should look like this in the listbox:510152025arrow_forwardPlease provide answer in C#: Slot Machine Simulation A slot machine is a gambling device into which the user inserts money and then pulls a lever (or presses a button). The slot machine then displays a set of random images. If two or more of the images match, the user wins an amount of money that the slot machine dispenses back to the user. Create an application that simulates a slot machine. Figure 8-23 (on page 539 of your book) shows an example of how the form should look. The application should let the user enter into a TextBox the amount of money he or she is inserting into the machine. When the user clicks the Spin button, the application should display three randomly selected symbols. (Slot machines traditionally display fruit symbols. You will find a set of fruit symbols attached to this dropbox for your use - from the Student Sample Programs provided by the book author.) If none of the randomly displayed images match, the program should inform the user that he or she has won…arrow_forward
- A(n) is a function or method that is called when a specific event occurs. 1. callback function2. auto function3. startup function4. exceptionarrow_forwardDriver’s License Exam The local driver’s license office has asked you to create an application that grades the written portion of the driver’s license exam. The exam has 20 multiple-choice questions. Here are the correct answers: 1. B 2. D 3. A 4. A 5. C 6. A 7. B 8. A 9. C 10. D 11. B 12. C 13. D 14. A 15. D 16. C 17. C 18. B 19. D 20. A Your program should store these correct answers in an array. The program should read the student’s answers for each of the 20 questions from a text file and store the answers in another array. (Create your own text file to test the application.) After the student’s answers have been read from the file, the program should display a message indicating whether the student passed or failed the exam. (A student must correctly answer 15 of the 20 questions to pass the exam.) It should then display the total number of correctly answered questions, the total number of incorrectly answered questions, and a list showing the question numbers of the incorrectly…arrow_forwardDistance File Modify the Distance Calculator program that you wrote for Programming Problem 1 so it writes its output to a file instead of displaying it in a ListBox control. Open the file in Notepad or Visual Studio to confirm the output.arrow_forward
- Name SearchIn the Chap07 folder of the Student Sample Programs, you will find the followingfiles:• GirlNames.txt—This file contains a list of the 200 most popular names given to girls born in the United States from 2000 through 2009.• BoyNames.txt—This file contains a list of the 200 most popular names given to boys born in the United States from 2000 through 2009.Create an application that reads the contents of the two files into two separatearrays or Lists. The user should be able to enter a boy’s name, a girl’s name, orboth, and the application should display messages indicating whether the nameswere among the most populararrow_forwardIn C++ please, using basic programming one coding The main menu should show the available options: Show the roster: Displays all the player names and jersey numbers in a numbered list. Ex: 1. Susan Martinez (33), 2. Jake Smith (21), etc. Add a player: Prompts the user to type the player's full name and jersey number. Then adds the player to the roster. Remove a player: Displays the roster and prompts the user to enter the number of the player to remove. Then removes the player from the roster. Quit: Quits the program. The program should display the main menu after the user shows the roster, adds a player, or removes a player. The program only terminates when the user chooses the quit option. Data validation should be used where appropriate. Ex: The user should not be able to choose an option that doesn't exist or delete a player that doesn't exist. The roster should be kept in alphabetic order by the players' full names. Ex: If Alice Chang (9) is added to a roster with Jake Smith and…arrow_forwardPendant Publishing edits multi-volume manuscripts for many authors. For each volume, they want a label that contains the author’s name, the title of the work, and a volume number in the form Volume 9 of 9. For example, a set of three volumes requires three labels: Volume 1 of 3, Volume 2 of 3, and Volume 3 of 3. Design an application that reads records that contain an author’s name, the title of the work, and the number of volumes. The application must read the records until eof is encountered and produce enough labels for each work. The flowchart must include a call symbol, at the beginning, to redirect the input to the external data file. create a solution algorithm using pseudocode create a flowchart using RAPTORarrow_forward
- Pendant Publishing edits multi-volume manuscripts for many authors. For each volume, they want a label that contains the author’s name, the title of the work, and a volume number in the form Volume 9 of 9. For example, a set of three volumes requires three labels: Volume 1 of 3, Volume 2 of 3, and Volume 3 of 3. Design an application that reads records that contain an author’s name, the title of the work, and the number of volumes. The application must read the records until eof is encountered and produce enough labels for each work. Design a flowchart and psuedocode Pendant Publishing.arrow_forwardQ6: What is the main purpose of endl and \n ? Q7: List and comments on the special escape codes.arrow_forwardc++ The Seri Kuala Lumpur School auditorium contains 20 rows (numbered 1 through 20) with 30 seats each (numbered 1 through 30). Write an application that allows a user to continuously enter a row and seat request until a sentinel value is entered. If the row or seat number is out of range, issue an error message. Otherwise, determine whether the seat has already been reserved. If so, display an error message. If not, then charge the user $7.50 for a ticket and display a running total of the user’s purchase. When the user enters a sentinel, display the number of seats taken and the number of seats available in the auditorium.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
Programming with Microsoft Visual Basic 2017Computer ScienceISBN:9781337102124Author:Diane ZakPublisher:Cengage Learning
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781305480537Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
Programming with Microsoft Visual Basic 2017
Computer Science
ISBN:9781337102124
Author:Diane Zak
Publisher:Cengage Learning
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781305480537
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT