3: Case Scenario Answers in .NET

Printer QR Code in .NET 3: Case Scenario Answers

You could divide the prompts by category and create a separate Web page for each category. This solution splits your code and data over several pages and can add to the overall complexity of the Web site. You could implement a solution using the MultiView control and create a separate View for each category. The MultiView and View do not have a user interface, so you have complete flexibility with regard to the graphical interface of the Web page.

You could implement the Wizard control and create a WizardStep control for each category. The Wizard contains the behavior for moving between steps and offers a more complete solution.

1. This solution can use the Calendar control in every situation where a date or dates are required to be entered by the user, and in every situation where a schedule is being displayed to a Web site user. The following list describes some of these situations where you can use the Calendar control:

Prompt for class start date. Prompt for class end date. Display of training provider s class schedule. Display of contractor s schedule.

2. Although you could use the Table control in these situations, you would need to write lots of code to get the functionality that the Calendar control provides natively, so the Calendar control is the best solution.

1. This solution is probably best suited to use the GridView for the customers and the orders because the ability to display this data as a list is a requirement. The GridView does not natively support the abiltiy to add new data records, but you can modify the GridView to provide this functionality. You can also supply a Button control that simply adds an empty data record and then places the record in edit mode. Another solution is to provide a DetailsView or FormView control in addition to the GridView controls for the customers and orders. The DetailsView and FormView provide the ability to add new rows, and you can edit all of the fields.

B. Incorrect: The DataColumn won t help with the navigation. C. Incorrect: The DataColumn won t help with the navigation. D. Correct: You can use the DataRelation to navigate from the child to the par ent or from the parent to the child. 2. Correct Answer: A A. Correct: Primary keys must exist or the changed data will be appended into the destination DataSet instead of being merged. B. Incorrect: The DataSet schemas do not need to match, and you can specify what to do about the differences. C. Incorrect: The destination DataSet does not need to be empty. D. Incorrect: The DataSet does not need to be merged back to the same DataSet that created it. 3. Correct Answer: C A. Incorrect: The DataTable object does not have a Sort method. B. Incorrect: The DataSet object does not have a Sort method. C. Correct: The DataView can be used for each sort. D. Incorrect: The DataTable object does not have a Sort method.

1. Correct Answers: B and D A. Incorrect: No such method. B. Correct: The Close method cleans up resources. C. Incorrect: Is not proactive and can orphan connections. D. Correct: The using block calls the Dispose method. 2. Correct Answer: A A. Correct: The InfoMessage event displays informational messages as well as the output of the SQL print statement. B. Incorrect: No such event. C. Incorrect: No such event. D. Incorrect: No such event.

3. Correct Answer: D A. Incorrect: No such key. B. Incorrect: No such key. C. Incorrect: No such key. D. Correct: You must set Asynchronous=true.

1. Correct Answer: B A. Incorrect: Cannot be used to create a new XML document. B. Correct: Use the XmlDocument class to create a new document from scratch. C. Incorrect: No such class. D. Incorrect: No such class. 2. Correct Answer: C A. Incorrect: No such type. B. Incorrect: No such type. C. Correct: Use the XmlConvert class. D. Incorrect: No such type.