Solution Manual for Microsoft® Visual Basic 2012 for Windows, Web, Office, and Database Applications

Solution Manual for Microsoft® Visual Basic 2012 for Windows, Web, Office, and Database Applications Comprehensive, 1st E Chapter 1-12 Answers to Knowledge Check Chapter 1 1. Computer hardware is the physical equipment associated with a computer such as the CPU, printer, and monitor. Computer software is a set of electronic instructions that directs the computer hardware to perform tasks.

2. a. accept input data b. process the data c. create output data, or information 3.

Matching a-2 b-4 c-7 d-3 e-6 f-1 g-5

4. An event means the user has initiated an action that causes the program to perform the type of processing called for by the user‟s action.

(Student can give any example of an event in an event driven program) Example 1: Enter an account number and click the Display Account Balance button to display the account balance.

Example 2: Click a Reset Window button to clear text boxes in the user interface.

5. Some examples of the differences between an input and output operation are: 1. User enters account number (input); program displays account balance (output).

2. User enters three test scores (input); program displays the average test score (output).

6. Addition: Add the cost of an item to the sales tax to compute the final cost Subtraction: Subtract a $1 coupon from the original cost of a meal Multiplication: Multiply the number of music downloads times the cost per download.

Division: Divide the sum of test scores by the number of tests to compute the average test score.

7. a. greater than b. equal to c. less than d. less than

e. equal to 8. The student can list any 3 databases that they could be found in: College Student Database Driver License Database Social Security Database 9. Syntax is a strict set of usage rules that a developer uses when coding a program.

The reason syntax is important is that even a single syntax error can cause a program to execute improperly.

10. A Toolbox in Visual Studio 2010 contains .NET components that you can use to develop the graphical user interface for the program. It saves you time since you can place buttons, picture boxes, labels, radio buttons, and other objects in the window.

11. The button properties could be the size of the button and the text that appears within the button.

12. Visual Basic, Visual C#, C++, F#, Javascript 13. The Windows store (online location maintained by Microsoft) 14. Visual Basic has a wide range of productivity features that enable developers to quickly generate high-quality software applications for Windows. VB is also English-like and one of the easier enterprise-level programming languages to learn.

15. a. .NET class library b. ADO.NET 4.5 c. ASP.NET 4.5 d. Common Language Runtime 16. A developer can write code one time and save it as a class. Then, all other programs can use the code when required. A class can be stored in a class library, which makes the class available to all developers.

17. The difference between a class and an object is that a class acts as a general template and an object is a specific item generated based on the class template.

Examples of a class are: Button class, ADO.NET class, and ASP.NET class.

Examples of an object are: button, textbox and picture box.

18. ADO.NET 4.5 provides the functionality for a program to perform the four primary tasks required when working with a database: get the data, examine the data, edit the data, and update the data.

19. The process of translating statements written by the developer is called program compilation. Program compilation for Visual Basic 2010 creates a set of electronic code expressed in an intermediate language called Microsoft Intermediate Language (MSIL).

20. Five types of applications are Windows, Windows Store, website, Office, and database.

SC Visual Basic 2012 Answers to Chapter 2 Student Assignments KNOWLEDGE CHECK 1. New Project button 2. Toolbox (displayed all the time since Pushpin is vertical) 3. Windows Form object 4. Form1.vb [Design] tabbed page 5. Properties window 6. Rapid Application Development 7. The purpose of the Auto-Hide button on the Toolbox title bar is to display or hide the Toolbox depending on whether the Pushpin icon on the button is vertical or horizontal. If the Pushpin on the Auto-Hide button is vertical, then the window has been pinned and will be displayed. If the Pushpin is horizontal, the Toolbox is in Auto Hide mode.

8. The red snap lines indicate that text within an object is aligned. The blue snap lines indicate when the sides of the objects are aligned.

9. frm 10. objects

11. To select four Button objects, select the first Button object and then hold down the CTRL key and click the other Button objects.

12. The purpose of a mock-up is to obtain client approval of the design. After the users and others approve the interface design, the developer can design the program elements required to implement the functionality of the program.

13. The first phase of the program development life cycle is to gather and analyze the program requirements. The second phase of the program development life cycle is to design the user interface.

14. lblVideo 15. btnSubmit 16. picTablet 17. (Name) property 18. Alphabetical 19. To save the interface mock-up that you have completed, you can click the Save All button on the Standard toolbar.

20. The Windows Form object is a window that you will use to build the program and is the window that will be displayed on your screen when you execute the program. The Label object displays a message on the user interface. The PictureBox object displays a picture. The Button object is used to cause an event to occur when the program is executing.

DEBUGGING EXERCISES 1.

Step 1: Click the Place Order object, and then CTRL+click the Close Window and Information Button objects. Click FORMAT on the menu bar and point to Align.

Step 2: Click Bottoms on the Align submenu.

Step 3: While the Button objects are still selected, click FORMAT on the menu bar and then point to Horizontal Spacing.

Step 4: Click Make Equal.

Step 5: While the Buttons are still selected, click FORMAT on the menu bar and then point to Horizontal Spacing.

Step 6: Click Increase.

Step 7: While the Buttons are still selected, click FORMAT on the menu bar and then point to the Center in Form command.

Step 8: Click Horizontally on the Center in Form submenu.

2. Correct Order: 1. User taps or clicks the Coffee button or Frappuccino button.

2. Program displays a picture of the coffee order selected by the user and enables the Place Order button.

3. User taps or clicks the button not selected in Step 1.

4. Program displays a picture of the coffee order selected by the user.

5. User taps or clicks the Place Order button.

6. Program displays an order confirmation message and disables both order buttons. The Close button becomes active.

7. User terminates the program by tapping or clicking the Close button.

PROGRAM ANALYSIS 1.

Step 1: Select the Save the Penguins Label object. Scroll to the Font property in the Properties window. Click the Font property in the left column of the Label Properties window.

Step 2: Click the ellipsis button for the Font property.

Step 3: In the Font dialog box, scroll through the Font list and click Tahoma.

Click Bold in the Font style list. Click 18 in the Size list Step 4: Click the OK button.

2.

Step 1: Select the Save the Penguins Label object. Click FORMAT on the menu bar and then point to Center in Form on the FORMAT menu.

Step 2: Click Horizontally on the Center in Form submenu.

3.

Step 1: Select the penguins PictureBox object. Click FORMAT on the menu bar and then point to Center in Form on the FORMAT menu.

Step 2: Click Horizontally on the Center in Form submenu.

4.

Step 1: Select the Donate Now Button object. Scroll to the Font property in the Properties window. Click the Font property in the left column of the Button object Properties window.

Step 2: Click the ellipsis button for the Font property.

Step 3: In the Font dialog box, scroll through the Font list and click Tahoma.

Click 10 in the Size list.

Step 6: Click Horizontally on the Center in Form submenu.

5.

Step 1: Click the Donate Now Button object, and then CTRL+click the Close Window Button object. Click FORMAT on the menu bar and then point to Align on the FORMAT menu.

Step 2: Click Tops on the Align submenu.

6.

Step 1: Select the Donate Now Button object, and then CTRL+click the Close Window Button object. Click FORMAT on the menu bar and then point to Make Same Size on the FORMAT menu.

Step 2: Click Horizontally.

7.

In the real world, after the mock-up is designed, it is shown to the users and others for approval. When the users approve the interface design, the developer can design the program elements required to implement the functionality of the program. This will save the developer from redesigning the whole user interface if the developer does not obtain approval before coding begins.

Answers to Chapter 3 Student Assignments KNOWLEDGE CHECK 1. BackColor 2. ForeColor 3. Web palette 4. Normal 5. Resources folder 6. The action taken by Visual Studio 2010 is to open the Select Resource dialog box which displays the resources that have been imported for the program. You can click the Import button to place images in the Resources folder.

7. Image 8. StretchImage 9. Enabled property 10. Visible property 11. True and False 12. picHomeTown.Visible = False 13. btnDiet.Enabled = True 14. picHeadphones.Visible = True

15. ' This code displays the headphone image 16. green 17. Close( ) 18. A blue squiggly line in the code window designates the location of an error. Visual Studio highlights the error in blue so the developer, if desired, can type and replace the highlighted text with the correct code.

19. = (equal sign) 20. a. Intellisense helps you avoid making errors when entering a statement. b. Microsoft created IntelliSense in response to the needs of developers in a rapid application development environment so they can enter statements accurately and easily. Most developers use IntelliSense and its use is standard within the software industry.

DEBUGGING EXERCISES 1. btnDisplayCartoon.Enabled = False 2. btnExitProgram.Visible = True 3. lblDirections.Visible = False 4. ' The following line of code makes the college logo visible 5. Close( ) 6. picDeluxeRoom.Visible = False PROGRAM ANALYSIS 1. picHike.Visible = True 2. a. Enabled property b. False 3. StretchImage property 4. btnView.Enabled = True 5. BackColor property

6. Text property Answers to Knowledge Check Chapter 4 1. Decimal, double and single 2. a. Dim intPopulation as Integer b. Dim decHoursWorked As Decimal c. Dim shrAge As Short or Dim bytAge as Byte d. Const cstrMyFirstInitial as String = “C” e. Dim decMinWage As Decimal f. Dim strCity as String g. Dim blnAnswer As Boolean 3. a. valid b. invalid, no special characters c. valid d. invalid, no special characters e. valid f. invalid, no VB commands allowed g. invalid, no spaces allowed 4. Step 1: Click the TextBox object that you want to keep stationary.

Step 2: Hold the Control key and click the other TextBox objects that you want to left align with the first.

Step 3: Click the FORMAT menu, click Align and Lefts.

5.

Decimal

6. 1. Exponentiation (^) is performed first.

2. Multiplication (*) and division (/) are performed next.

3. Integer division (\) is next.

4. MOD then occurs.

5. Addition (1) and subtraction (2) are performed last.

6. Within these five steps, calculations are performed left to right.

7. a 17 b. 29 c. 28 d. 5 e. 5 f. 11 g. 12 8. The terms method and procedure are virtually synonymous.

9. A variable identifies a location in memory where a value can be stored and can be changed by statements within the program. A literal is not a variable. The value you include in an assignment statement will be a literal because it is literally the value that is required A literal is given a specific value as defined by the assignment statement.

10. a. Dim intAge as Integer b. Dim dblDiscountRate as Double c. Const cstrUniversity As String =“CVCC” d. Dim strLastName as String e. strLastName = “McNamara” f. decOverTimePayRate = decHourlyPay *1.5 11. txtLastNameFocus() 12. txtAge.Clear() 13. lblEligibilityAge.Text = “” 14. strWaistSize = Convert.ToInt32(intWaistSize) 15. decWage = Convert.ToDecimal(strHourlyPay) 16. Close() 17. Const decInsuranceDeductible As Decimal = 329.25D 18. AcceptButton property 19. A local variable can only be used within the region which it is defined. A global variable can be called and used in any of the procedures within the public class.

The scope of a global variable is such that it can be used in multiple regions of the program.

20. $12.64 Answers to Debugging Exercises for Chapter 4 1. Option Strict On Dim decDistance as Decimal decDistance = 17.5 2. Dim dblRegularPay As Double Dim dblOvertimePay As Double Dim dblTotalPay As Double

dblRegularPay = 783.87 dblOvertimePay = 105.92 dblTotalPay = dblRegularPay + dblOvertimePay lblTotalPay.Text = dblTotalPay.ToString(“C”) 3. You need a variable declared to hold the Integer variable for the number of inches representing someone‟s height. You must add a line after the present line 7 to convert the String variable to an Integer data type. Also change the format specifier to N. Dim intFeet As Integer Dim strInches As String Dim intInches As Integer strInches = txtHeight.Text intInches = Convert.ToInt32(strInches) intFeet = intInches / 12 lblFeet.Text = intFeet.ToString("N")

Answers to Program Analysis for Chapter 4 1. The label lblSlope Object will display the following: The Line Slope is 5.857 2. 2.56% 3. 3746.356 4. MaskedTextBox object 5. a. lblDvd.Text = decDvdCost.ToString(“C”) b. lblWithholdingTaxRate.Text = decWithholdingTaxRate.ToString(“P1”) c. lblOilRevenue.Text = decOilRevenue.ToString(“N2”) 6. Dim decWindSpeed as Decimal = 25.47D 7. a. 77 b. 8 c. 5 8. Dim dblPay as Double= 10.9R (or any value – must be assigned a value before the next statement) Me.lblPay.Text = dblPay.ToString(“C2”) 9. Dim strMilesRan As String Dim decCaloriesConsumed As Decimal Dim decMilesRan As Decimal Const cdecCaloriesBurnedPerHour = 700.0D

strMilesRan = txtMilesRan.Text decMilesRan = Convert.ToDecimal(strMilesRan) decCaloriesConsumed = decMilesRan * cdecCaloriesBurnedPerHour lblCaloriesBurned.Text = decCaloriesConsumed.ToString (“N0”) 10. 3 year(s) until you can drive.

Answers to Chapter 5 Student Assignments KNOWLEDGE CHECK 1. The first RadioButton object is deselected or unchecked.

2. =

Equal to

<>

Not equal to

>

Greater than

<

Less than

>=

Greater than or equal to

<=

Less than or equal to

3. if decMaleShoeSize >= 9.0 And decMaleShoeSize <= 12.0 Then lblResponse.Text = "Your size is in stock" End If

4. if strHighway = "I95" Then intSpeed = 65 Else intSpeed = 45 End If

5. The three most common logical operators are: Logical Operator Meaning And

All conditions tested in the If statement must be true

Or

One condition tested in the If statement must be true

Not

Negates a condition

6. If intHeight > 75 Then 7. An error would be produced by this statement because a RadioButton object cannot be assigned to the command Checked. The statement should be rewritten: if radDormStudent.Checked= True

8. An error would be produced by this statement because the logical operator And means that all condition tested in the If statement must be true. A value cannot be both less than 0 and greater than 100 at the same time. The statement should be rewritten: If intGrade < 0 Or intGrade > 100 Then

9. GroupBox object 10. If decMinWage > 7.25 and decMinWage <15.25 Then 11. The reason most developers indent the code within a decision structure is for ease of reading.

12. MsgBox("Become a Geek Goddess", 64, "Code in Visual Basic") 13. The difference between a Panel object and a GroupBox object is that a GroupBox object has a caption, scroll bars, and displays a labeled border. You can use both a Panel object and a GroupBox object in a Windows application.

14. The difference between the Or logical operator and the Xor logical operator is that an Or logical operator is true when one condition that is tested is true. The Xor logical operator is true when one condition in the compound condition is true, but not both.

15. If intAge < 1 Or intAge > 120 Then MessageBox.Show("Age is Not Valid") End If

16. One 17. strCompound = strTerm1 & strTerm2 18. radSurfboard.Checked=False 19. Select Case intMonth Case 1, 3, 5, 7, 8, 10, 12 MessageBox.Show("31 Days") Case 2 MessageBox.Show("28 Days") Case 4, 6, 9, 11 MessageBox.Show("30 Days") End Select

20. Not DEBUGGING EXERCISES 1. The first statement first compares if strAirline is equal to Jet Green. If strAirline is not equal to Jet Green the statement does not compare the second portion of the statement because as soon as a condition is found to be false, no further conditions are tested and the compound condition is false. The second statement compares if strAirline is equal to Jet Green and if strHotel is equal to Homeland Suites. Both conditions are tested regardless if the first condition is found to be false. If both variables are equal to the value compared then the statement is true.

2. The error in the If…Else statement is caused when the variable intBonus is referenced outside of the block that it was declared within. The error would occur when intBonus is assigned to 0 in the Else portion of the statement. The variable intBonus would be out of scope. The intBonus variable can be referenced in any statements between the If keyword and the Else keyword. It cannot be referenced anywhere else in the program. It causes an error when it is referenced in the Else portion of the If statement. The code can be corrected by declaring intBonus before the If…Else block of code.

3. Errors: The command Is should appear in each Case Statement The Else Case should read Case Else The last line Select End should read End Select Select Case intNumberOfSeats Case Is > 5000 strVenueType = "Stadium" Case Is > 2000 strVenueType = "Amphitheater" Case Is > 1000 strVenueType = "Auditorium" Case Is > 200 strVenueType = "Theater" Case Is > 0 strVenueType = "Club" Case Else strVenueType = "Error" End Select

4. The single quotes within the program should all be double quotes.

Select Case charFlightCode Case "F", "A" lblFare.Text = "First Class" Case "B", "Q" lblFare.Text = "Business Class" Case "Y", "S", "M" lblFare.Text = "Full Fare Economy" Case "K", "C" lblFare.Text = "Preferred Economy" Case "U", "J", "P", "G" lblFare.Text = "Economy"

Case Else lblFare.Text = "Unknown" End Select

5. Missing the End If statement closing the second If statement and the closing End If statement for the first If statement on the last line.

If strShippingMethod = "Overnite" Then If strDeliveryTime = "Morning" Then decDeliveryCost = 29D Else decDeliveryCost = 24D End If Else If strShippingMethod = "Two Days" Then decDeliveryCost = 14D Else decDeliveryCost = 4D End If End If

PROGRAM ANALYSIS 1. If decDeveloperPay > decWebDesignerPay Then MsgBox(decDeveloperPay.ToString() & " is greater than " & decWebDesignerPay.ToString()) End If

2. If decTemp >= 30 And decTemp <= 35 Then MsgBox("Sleet is possible") End If

3. If chrGender = "M" Then lblCollegeExpectation.Text = "75% plan to graduate from college" ElseIf chrGender = "F" Then lblCollegeExpectation.Text = "85% plan to graduate from college" Else lblCollegeExpectation.Text = "Invalid Gender" End If

4. Select Case intAge Case Is >= 50 strGeneration = "Baby Boomers" Case 39 To 49 strGeneration = "Generation X" Case 18 To 38 strGeneration = "Generation Y" Case Is < 18 strGeneration = "Millenials" End Select

5. If chrDepartment = "B" Or chrDepartment = "b" Then strDept = "Baby / Infant Clothing"

ElseIf chrDepartment = "T" Or chrDepartment = "t" Then strDept = "Technology" End If

6. Select Case intGrade Case 9 To 12 lblSchool.Text = "High School" Case Is >= 7 lblSchool.Text = "Middle School" Case Is >= 1 lblSchool.Text = "Elementary School" Case Else lblSchool.Text = "Invalid Grade" End Select

7. A MessageBox object will display the text Expert Slope.

8. If 74 is entered, Tall is displayed in the lblFemaleHeight Label. If 81 is entered, Towering is displayed in the lblFemaleHeight Label. If 59 is entered, Petite is displayed in the lblFemaleHeight Label.

9. a. False b. False c. False d. True e. False f. False g. True h. True i. False j. False Answers to Student Assignments Chapter 6 KNOWLEDGE CHECK 19. strMovieCount = InputBox(“Number of Instant Queue Movies”, “Hulu Plus”, “12”) 20. a. intTouchdown += 6 b. dblSquare ^= 2 c. strFast &= “Comet” 21. a. For a = 1 To 100 intSum += a Next b. For a = 10 To 50 Step 2 intSum += a Next c. For a = 20 To 60 Step 10 intSum += a

Next 22. a. Remove quotes b. Need a negative step value c. Need a positive step value d. Do not use a String data type variable (strCount) 23. An ampersand in a MenuStrip object creates a hot key.

24. lstBaseballPlayers.Items.Clear() 25. lstFavoriteTeam.Items.Add(“Favorite Band Goes Here”) 26. intAmount += 7 27. intCounter -= 4.5 28. intQuantity +=10 29. Do Until intValue > 19 Loop 30. Do While strContinue = “Yes” 31. Do While intDenominator <> 0 Loop 32. Top-controlled 33. intForeverStuck = 1 Do Until intForeverStuck > 2 „ Error - Infinite Loop Loop 34. For…Next loop 35. Zero 36. Do Until intAge >=1 And intAge <=115 Loop

37. Nested loop 38. File, Edit, Tools, and Help DEBUGGING EXERCISES 1. The For loop needs a -1 decrement. (Step -1) 2. There is no output. Change the code to: Do While intRate <=20 3. 40 4. 2 8 4 64 6 216 8 512 5. Dim intStart As Integer = 8 Do While intStart < 24 intStart += 4 Loop 6. 38 36 34 32 30 28 26 7. Line 9 should be decCost += 0.5 8. The code needs a counter – intOddNumber += 2 after line 69 PROGRAM ANALYSIS 1. -15 -10 -5 0 5 10 15 20 25 2. 9 12 15 18 21 3. Do Until intQuantity >= 30 intQuantity += 5 Loop

4. Dim intIncrease as Integer For intIncrease = 10 To 38 Step 2 lstDisplay.Items.Add(intIncrease) Loop 5. 15 6. 4 7. For intLoopValue = intStartValue To intEndValue Step 2 intSum += intLoopValue Next Answers to Chapter 7 Student Assignments KNOWLEDGE CHECK 1. BackgroundImage 2. Threading.Thread.Sleep(6000) 3. When passing by value, the value of a variable is copied over into the Sub procedure.

Therefore, the copied value may change inside that procedure, but the original variable‟s value will not change. When passing by reference, though, the original variable‟s value can be changed because you are referring to the variable itself, not just the value.

4. zero 5. Sub procedure 6. Function procedure 7. The original variable will remain unchanged and the variable‟s value within the procedure will be lost.

8. Sub procedure and Function procedure 9. one 10. Return intSpeed 11. Private Sub SeatAvailability(ByRef intSeats As Integer) End Sub 12. argument

13. by value 14. true 15. false 16. false 17. FormatException 18. FormatException 19. OverflowException 20. a. Does a value need to be returned? b. Do you know the data types of the arguments you will be referencing or passing? c. Do you have a receiving variable, and do you know its data type?

DEBUGGING EXERCISES 1. the cost and count variables must be passed by reference: Private Sub btnItemNumber_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnItemNumber.Click Dim decCost As Decimal Dim intCount As Decimal decCost = Convert.ToDecimal(txtCost.Text) Inventory(decCost, intCount) End Sub Private Sub Inventory(ByRef cost, ByRef count) count +=3 cost *=1.3 End Sub 2. Missing Return Type and Return statement Private Sub btnBaseball_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnBaseball.Click Dim decHits As Decimal = 190 Dim decTimesAtBat As Decimal = 428 Dim decBattingAverage As Decimal decBattingAverage = BattingAverage(decHits, decTimesAtBat) lblHits.Text = "The batting average is " & decBattingAverage.ToString()

End Sub Private Function BattingAverage(ByVal decHitsCount As Decimal, ByVal decNumberAtBat As Decimal) Dim decAverageAtBat As Decimal decAverageAtBat = decHitsCount / decNumberAtBat Return decAverageAtBat End Function 3. The Sub must be changed to Function PROGRAM ANALYSIS 1.

1 8 27 64 125 216 343

2. Why should you carry a watch when crossing a desert?

Because it has a spring in it 3. The lblFirst Label object displays “The first name has 15 letters.”

The lblSecond Label object displays “The second name has 13 letters.”

The lblEnd Label object displays “My favorite was Dino” 4. The average man says 2000 words a day The average woman says 7000 words a day The couple would say 9000 words a day The average length of a coat hanger when straightened is 44 inches.

5. intCubed = Double(intValue) 6. intSolution = RandomFunction(intBase) „ This would be in a different procedure Private Function RandomFunction(ByRef intPopulation As Integer) Try intPopulation = Convert.ToInt32(txtCityPopulation.Text) Catch Exception As OverflowException MsgBox("Your entry is invalid- too large or small”) Catch Exception As FormatException MsgBox("Your entry is invalid. Enter a numeric value”) Catch Exception As SystemException

MsgBox("There was an error with your entry.")

End Try Return intPopulation End Function 7. Private Sub FindHeight(ByVal intFeet, ByVal intInches) Dim intTotalInches As Integer intTotalInches = (intFeet * 12) + intInches MsgBox(“You are “ & intTotalInches & “ inches tall.”)

End Sub Answers to Chapter 8 Student Assignments KNOWLEDGE CHECK 1. Dim intLuckyWinners() As Integer = {6,9,18, 31 26, 17} 2. intAddressCount = strAddressBook.Count 3. 74 4. Dim intEvenNumbers() As Integer = {2, 4, 6, 8, 10} 5. a. strCityNames(0) = “Detroit” b. strCityNames(3) = “Miami” c. seven d. seven e. IndexOutOfRangeException 6. yes 7. Dim strFlintstones() As String = {“Fred”, “Wilma”, “Pebbles”} 8. Wilma 9. zero 10. intSpan = intMovieTimes.Length 11. Dim intPinNumbers( , ) As Integer = {{1659, 2916, 9876, 3928}, {1117, 9665, 5397, 4488}, {1211, 0767, 2956, 2041}} 12. 35 13. decRoomSize(4, 6) = 12.3

14. strCartoon(0) = objReader.ReadLine() 15. Dim objReader As IO.StreamReader objReader = IO.File.OpenText("E:\accesscodes.txt")

16. Array.Sort(strStreetNames) 17. A negative value in the Binary Search method means that no match was found in the array.

18. The default value in an integer data type is zero.

19. Hide( ) 20. Public Shared _intFinalExam As Integer DEBUGGING EXERCISES 1. Dim intJellyBeans() As Integer = {23, 77, 89, 124, 25} ReDim Preserve intJellyBeans(10) 2. Dim strHighwayNumbers () As String = {“95”, “81”, “605”, “5”} 3. Dim strFriends() As String = {“Brea”, “Eric”, “Daniel”, “Ryan”, “Brittany”} 4. objReader = IO.File.OpenText(“E:\testresults.txt”) 5. For Each intPulseRate in intHeartRate .lstPulse.Items.Add(intPulseRate) Next 6. IndexOutOfRangeException 7. „ To read each record of a file and load it into the array strFordModel Do While objReader.Peek <> -1 strFordModel(intCount) = objReader.ReadLine() intCount += 1 Loop 8. Dim intEvenNumbers(4,8) As Integer PROGRAM ANALYSIS 1. Superman 2. intJellyBeans (0) = 0, intJellyBeans (1) = 0, intJellyBeans (2) = 24,

intJellyBeans (3) = 0, intJellyBeans (4) = 0, intJellyBeans(5) = 0, intJellyBeans(6) = 0 3. intJellyBeans(0) = 23, intJellyBeans(1) = 77, intJellyBeans(2) = 24, intJellyBeans(3) = 59, intJellyBeans(4) = 25, intJellyBeans(5) = 0, intJellyBeans(6) = 0 4. The Insurance Rate is 612 5. 7 29 27

6. For Each strPlay In strSongNames lstDisplay.Items.Add(strPlay) Next 7. Dim strStocksOwned() As String = {“Microsoft”, “Cisco”, “Coca-Cola”, “Disney”, _ “Exxon”, “Merck”} Dim objWriter As New IO.StreamWriter(“E:\stockportfolio.txt”) Dim intCount As Integer Array.Sort(strStocksOwned) For intCount = 0 To (strStocksOwned.Length – 1) If IO.File.Exists(“E:\stockportfolio.txt”) Then objWriter.WriteLine(strStocksOwned(intCount)) Else MsgBox(“The file is not available – Please try again later”, , “Error”) Close() End If Next objWriter.Close()

8. For intCount = 0 To (decMaySales.Length –1) decTotal += decMaySales Next decAverageSale = decTotal / decMaySales.Length lblAverage.Text = decAverageSale.ToString(“C”) 9. 0 1 2 1 2 3 2 3 4 3 4 5 10. Dim strDay As String = {“Sunday”, “Monday”, “Tuesday”, “Wednesday”, _ “Thursday”, “Friday”, “Saturday”} Dim intDay As Integer intDay = Convert.ToInt32(txtDayOfWeek) lblFullDay.Text = strDay(intDay)

11. For intCount = 0 to 8 intSeniorSum += intSeniorGrades(6, intCount) Next 12. frmInitial

Answers to Knowledge Check Chapter 9 39. Web server 40. The student should list five web sites that display a web form. All responses will be unique. An example of a response: a. Catalyst Communications Contact Us page; purpose – to enter contact information and comments, then send to them via web form; http://www.catcomtec.com/component/option,com_contact/Itemid,3/ b. Orbitz.com; purpose – one purpose is to find airfare prices by selecting dates of travel and destination (and where you would like to leave from); www.orbitz.com c. Macy‟s; purpose – to allow users to become part of the mailing list; www.macys.com. d. BB&T online banking pages; purpose – allow the logged in user to control their banking accounts (bill pay, transfer of money from account to account) – which includes their log in page; https://online.bbandt.com/online/servlet/efs/loginbbt1.html?WT.svl=1 e. Anthem‟s Online Pharmacy; purpose – enter shipping and billing information for faster and cheaper prescriptions; https://www.anthemprescription.com/member/Init.do

41. .aspx 42. Web browser 43. Web server 44. dynamic 45. (ID) 46. txtArrivalDate.Text = cldSelectDate.SelectedDate.ToShortDateString() 47. If ddlSize.SelectedItem.Text = “L” Then lblSizeDisplay.Text = “You have selected size: Large” End If

48. The major difference between a CheckBox object and a RadioButton object is that the user can select more than one option for CheckBox objects but only one selection/option for a RadioButton object.

49. ControlToValidate 50. CompareValidator 51. RangeValidator 52. RequiredFieldValidator 53. strResponse = strResponse.ToLower() 54. intSizeOfCompanyName = strCompany.Length 55. lblDisplayBirthday.Text = cldBirthdate.SelectedDate.ToShortDateString() 56. The actual image is referenced from a Web site and not a local image on the user‟s computer and is loaded from that Web site using a URL for the image when the Web page is loaded in the browser.

57. Type of Validation: RequiredFieldValidator a. Change the (ID) property to a valid name. b. Change the ControlToValidate property to the field being validated. c. Change the ErrorMessage property to the actual text to be displayed when an error occurs such as Login entry Left Blank. d. ForeColor property of the error message was changed to red.

58. Site.master Answers to Debugging Exercises for Chapter 9 1. intVideoTitle = strVideoTitle.Length 2. If chkSpeedingTickets.Checked Then decTicketCost += 120 End If 3. Live long and prosper 4. Count=19 5. Home Address: 3506 Wards Rd

Lynchburg, VA 24502 Answers to Program Analysis for Chapter 9 1. a. ControlToValidate = txtDeductibleRange b. MinimumValue = 12.50 c. MaximumValue = 500.00 d. Type = Currency e. ErrorMessage = Please enter an acceptable deductible between 12.50 and 500 2. lblStringLength.Text = strSentence.Length 3. If chkOutsideWash.Checked Then strService += “Outside Wash” & “<br>” End If If chkVacuum.Checked Then strService += “Vacuum” & “<br>” End If If chkDetailing.Checked Then strService += “Detailing” & “<br>” End If If chkWax.Checked Then strService += “Wax” & “<br>” End If lblService.Text = strService Answers to Chapter 10 Student Assignments KNOWLEDGE CHECK 1. false 2. ActiveX Data Objects 3. Structured Query Language 4. primary key 5. Access, SQL, and Oracle 6. A DataSet object is temporary cache storage for data retrieved from a data source. The DataSet object is a major component of the ADO.NET 4.5 architecture.

7. record 8. TextBox, ComboBox, Label, LinkLabel, and ListBox objects

9. BindingNavigator 10. The Save button on the navigational toolbar must be pressed to save the record to the database.

11. 11 12. AutoNumber, State Name, State Capital, Population 13. strCapitalCity= Convert.ToString(datCost.Rows(3)("State Capital")) 14. Data Source, Display Member, Value Member 15. Rows procedure 16. Dispose 17. Dim strOrder as String = “SELECT * FROM Coffee” 18. * 19. The wildcard symbol means all fields within the table are available.

20. odaCollection.Fill(datCoins)

DEBUGGING EXERCISES 1. For intRecordCount = 0 To datInventory.Rows.Count - 1 ' Processing statements Next 2. intNumberOfRows = datCityName.Rows.Count

3. strNumberOfRows = Convert.ToString(datCityName.Rows(5)(“City”)) PROGRAM ANALYSIS 1. Dim strConnect As String = "Provider=Microsoft.ACE.OLEDB.12.0 ;" & "Data Source=E:\usedcarparts.accdb" 2. 6 3. Orioles

4. San Diego, CA 5. 4

Chapter 11 Knowledge Check 1. The text box is empty.

2. MaskFull property 3. TabIndex property 4. Presentation tier: user interface, forms; Business tier: Logic, calculations; Persistence tier: Data storage (files and databases).

5. Presentation with business; business with presentation; business with persistence; persistence with business.

6. 1) Right-click the project name in the Solution Explorer; 2) Click Class on the Add submenu; 3) Name the class and then click the Add button in the Add New Item dialog box.

7. Dim objEmployee As Employee objEmployee = New Employee 8. When a class is instantiated into an object using the New keyword.

9. Instantiate: objVehicle = New Vehicle(txtColor, txtModel, txtEngine) Vehicle Class: Sub New(strColor As String, strModel As String, strEngine As String) 10. decDiscount = objDiscountItem.ComputeDiscount()

11. a) The program is easier to read, understand, and maintain; b) A class can be used in multiple programs; c) The processing and data is separated from unrelated data and processing. This is called encapsulation; d) Variables are hidden, yielding fewer errors.

12. attributes; procedures 13. A subclass can use attributes and procedures from a base class as if those attributes and procedures were defined in the subclass.

14. The Inherits entry.

15. MyBase statement.

16. It is a procedure in a base class that can be overridden by a procedure in a subclass with the same name. It allows a procedure in a subclass with the same name as a procedure in a base class to perform different processing than the base class procedure.

17. Yes. It is resolved through inheritance.

18. A text file where the values in fields are separated by commas.

19. It tells the procedure to write the next record in the file following the last record in the file.

20. The Write procedure writes a field and does not create a new line, or record, in the file. The WriteLine procedure writes a field and begins a new line, or record, in the text file.

Debugging Exercises

1. If a single error occurs, such as the last name not being entered or being nonalphabetic, a message box will be displayed. When the user clicks the OK button in the message box, the user can enter the last name. If two or three errors occur, then a message box appears for each error and the user is not given the opportunity to make a correction before the next textbox is checked. This is the wrong behavior. To repair the code, the ElseIf statements should be used, as shown in Figure 11-7 on page 670.

2. 4

Sub New(ByVal strLastName As String, ByVal _ strNumberOfDependents As String)

3. 5

objStoreName as New StoreName

4. 22 me.lblStoreAddress = objStoreName.GetAddress()

Program Analysis 1. A text file with the following record format: Student ID, Student Name, Major, Student Costs Example record: 555-00-0011, Jenny Hartleson,Chemistry,10500.00 If a device is not available in drive e:, a message box stating "No device available – program aborted" is displayed and the application is exited.

2. Output: A message box containing "Customer function" 3. Output: A message box containing: "Internet customer function" 4. Output: A message box containing: "Overrode the customer overridable function" 5. Output: A message box containing: "Overridable customer function"

Answers to Chapter 12 Student Assignments KNOWLEDGE CHECK 1. Unlike traditional desktop Windows applications, a Windows Store app has a single, chromeless window that fills the entire screen by default with menus or a minimize/maximize button.

2. tiles 3. .appx 4. While traditional inputs such as keyboard and mouse are still supported, other input methods such as touch and finger gestures are primary interaction with the user interface 5. 10 6. Visual Basic and C# with XAML, C++ with XAML or DirectX, and JavaScript with HTML/CSS 7. Extensible Application Markup Language

8. XAML is responsible for the design and Visual Basic is responsible for the events.

9. Touch or click at the top center portion of the screen and drag the app toward the bottom of the screen. When you let go, the app closes.

10. MainPage.xaml 11. It contains your keyfile related to your Developer‟s license.

12. The Basic Page template can adapt to different layouts and adds helper classes that increase functionality.

13. Package.appxmanifest file 14. property marker 15. simulator and remote machine 16. Performance Analysis tool 17. $49 and $99 18. 70% 19. a.Collect the full-price of the app before download b. Free trial or limited versions of the app – paid full version available c. Sell content and, other apps, or new app functionality (such as unlocking the next level of a game) from within the app d. Create an income stream from in-app advertisements

20. 5 DEBUGGING EXERCISES 1. SplashScreen.png, Logo.png, SmallLogo.png, and StoreLogo.png 2. SplashScreen.png: 620 x 300 px, Logo.png: 150 x 150 px, SmallLogo.png: 30 x 30 px, StoreLogo.png: 50 x 50 px