How do you read the currently chosen item from a ListBox without throwing an exception if no item is selected?
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A: The answer is given in the below step
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Q: How do you add items to a ListBox control using the Properties window?
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How do you read the currently chosen item from a ListBox without throwing an exception if no item is selected?
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- How can you read the selected item from a ListBox while preventing an exception from occurring if no item is selected?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"
- Reminder: This is a bare code without any class or function/method heading around the code. Just the nested loopIs this statement true or false? You may store items in a ListBox by adding them to the Text property of the control.True or False: Adding more control variables will always increase the R 2 value. True False
- VBA - EXCEL Engine – optional – this indicates the solving method that needs to be used to get to a solution. 1 for the Simplex LP method, 2 for the GRG Nonlinear method, or 3 for the Evolutionary method. This corresponds to the Select a Solving Method dropdown list in the Solver Parameters dialog box EngineDesc – optional -this is an alternate way of selecting the solving method – here you would type the strings “Simplex LP”, “GRG Nonlinear” or “Evolutionary”. This also corresponds to the Select a Solving Method dropdown list in the Solver Parameters dialog box What happens when the code demonstrates: Engine:=1, EngineDesc:="GRG Nonlinear" ?Please no written by hand solution A magazine contains fifteen pages. You open to a random page. The page number is six or ten.Driver’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…
- Lab Goal : This lab was designed to teach you how to use a while loop. Lab Description (JAVA PROGRAMMING): Remove all occurrences of the removal string from the original string. Each time you take out the removal string you must also remove the letter that preceded the removal string. After you remove a string and its leading character, you must check to see if any more occurrences of the removal string exist. Sample Data : xR-MxR-MHelloxR-M R-M sxsssxssxsxssexssxsesss xs fuxqwexqwertyxqwexqwe Sample Output : xR-MxR-MHelloxR-M - String to remove R-M Hello sxsssxssxsxssexssxsesss - String to remove xs sesss fuxqwexqwertyxqwexqwertyrtyxqwertyrtyn - String to remove qwerty fun dogdogcatddodogdogdoggog - String to remove dog catgog algorithm help use indexOf to look for more removals while you have more removals { take out the current removal using substring use indexOf to look for more removals } I need help with assignment: "String Cleaner" StringRemover.js: //(c) A+…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()Theater Ticket System: A small ten-seat theater has contracted you to build software which will reserve tickets. The theater has two rows of five seats each. Each row is referred to by number (1 or 2) and each seat in the row is referred to by letter (A, B, C, D, and E). When started, the program should ask the user for the row they prefer (row selection). If that row has no empty seats then the program should ask the user if they prefer the other row, if no then display a message stating the next show is tomorrow. Upon selecting a row, the program should present the user with a choice of available seats in the row. The user can then either choose a seat and print the ticket (in this case a simple message will suffice) or return to row selection. If a ticket is printed the program should return to row selection. The program terminates when all seats are reserved. Please enter a row: 1 Available seats: A B C D E Which seat, enter Q for none?: B You have booked seat: 1B…