Debugging, Creating Executable Files, and Distributing a Windows Application

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Chapter 8

• Debugging, Creating Executable Files, and
  Distributing a Windows Application

2
Objectives

• Describe the difference between syntax, logic,
  and run-time errors
• Find syntax errors during design time
• Fund run-time errors and logic errors during run
  time
• Set breakpoints
• Execute one statement at a time by stepping

3
Objectives

• Set the next statement to execute
• Evaluate variables using DataTips
• Evaluate variables and expressions using the
  QuickWatch and Watch windows
• Change values of variables using debug tools
• Use the Autos, Locals, and Me windows to examine
  variables and objects

4
Objectives

• Use the Command window to execute commands
• Set the icon for an executable file
• Create an executable file
• Create a setup program to distribute a Windows
  application

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Starting Visual Basic .NET and Opening an
Existing Project

• Insert the Data Disk in drive A
• Start Visual Basic .NET. When the Start Page
  appears, click the Open Project button
• Double-click the Chapter8 folder on the Data Disk
• Double-click the Todays Sales Check folder. If
  necessary, click the Todays Sales Check solution
  file
• Click the Open button

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8
Visual Basic .NET Error Types

• Syntax Errors
• Code violates a rule of the Visual Basic .NET
  language
• Logic Errors
• Code executes, but program results are incorrect
• Run-time Errors
• Program halts during run-time due to an invalid
  statement or operation (divide by zero)

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Syntax Errors

• Occur when the code violates a rule of the Visual
  Basic .NET language
• Misspelled keywords
• Misspelled variable names
• Missing keywords
• Visual Basic .NET underlines syntax errors, and
  Intellisense displays a description of the error
  when the mouse hovers over

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Finding and Fixing Syntax Errors Using the Task
List Window

• Click View on the menu bar, select Other Windows,
  and click Task List
• Double-click the third task in the Task List
• Double-click the fourth task in the Task List
• Click line 169 and enter Dim sngTotalAdvertised
  As Single as the new line of code. After
  entering the code, click a different line to move
  the insertion point to another line of code
• Double-click the first task in the Task List
  window

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Finding and Fixing Syntax Errors Using the Task
List Window

• Right-click the word, Check in line 148 on the
  left side of the assignment statement
• Click the ListMembers command
• Double-click the property, Checked, in the
  Members list. Click another line in the code
  window
• Double-click the value, Fales, on line 148. Type
  False to correct the spelling mistake. Click
  another line in the code window

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Using Breakpoints with Stepping and DataTips

• Click the Start button on the Visual Basic .NET
  Standard toolbar
• Click the Close button in the Todays Sales Check
  window to close the window. Click the Todays
  Sales Form.vb tab in the main work area
• Scroll to the frmTodaysSalesCheck_Resize event
  procedure.
• Click the column at the left side of the code
  window, directly to the left of line 213

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Using Stepping and DataTips with Breakpoints

• With a breakpoint set at line 213, click the
  Start button on the Standard toolbar to enter run
  time. When the execution halts at line 213,
  click the Breakpoints tab
• Move the mouse pointer over the property,
  Me.Width, on line 213. Move your mouse pointer
  over intColumn0Width on line 213
• DataTip displays with the property or variable
  name, along with their current value
• Press the F8 key to step through the statements

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Disabling a Breakpoint and Correcting a Logic
Error

• Right-click anywhere in line 213. When the code
  window shortcut menu appears, click the Disable
  Breakpoint command
• Click the Stop Debugging button on the Debug
  toolbar. Use the code window scroll bar to
  scroll the code window to the right, until the
  end of line 213 displays. Click after the text,
  lstTodaysSales.Columns(2).Width. Enter -
  lstTodaysSales.Columns(3).Width and then press
  the SPACEBAR

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Breaking on a Run-Time Error and Using a
QuickWatch

• Click the Start button on the Standard toolbar to
  run the project
• Click the Enter Todays Sales button. Enter the
  test data in table 8-4 on page VB 8.26
• Click the OK button after entering the second
  item, without entering a description in the Item
  Description text box
• Click the Total Todays Sales button
• Click the Break button in the Microsoft
  Development Environment dialog box

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Breaking on a Run-Time Error and Using a
QuickWatch

• Right-click the variable, intIndex, in line 174,
  the last line executed before the line that
  causes the error, to check the value of the
  variable prior to the error. When the code
  window shortcut menu appears, click the
  QuickWatch command
• Click the Close button in the QuickWatch window.
  Repeat the previous process with the intListCount
  variable in line 174
• Click the Close button in the QuickWatch window

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Adding a Watch to the Watch Window

• With the application in break mode and paused on
  line 175, right-click the intIndex variable on
  line 174. When the code window shortcut menu
  appears, click the Add Watch command
• Repeat the process above with the
  lstTodaysSales.Items(intIndex).SubItems(1).Text
  property on line 175, and the intListCount
  variable on line 174.

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Adding a Watch to the Watch Window

• Click the Stop Debugging button on the Debug
  toolbar
• Click to the left of line 175 to set a breakpoint
  at line 175

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Watching Variables and Using a Breakpoint in a
Loop

• Click the Start button on the Standard toolbar
• Click the Enter Todays Sales button. Enter the
  test data in table 8-4 on page VB 8.26 and click
  the OK button after entering the second item,
  without entering a description in the Item
  Description text box
• Click the Total Todays Sales button

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Watching Variables and Using a Breakpoint in a
Loop

• Press the F5 key to resume running the project
• Press the F5 key (again) to resume running the
  project
• Click the Stop Debugging button on the Debug
  toolbar

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Fixing a Run-Time Error in a ForNext Loop

• Click the end of line 174. Type 1 to fix the
  error
• Right-click line 175. When the code window
  shortcut menu displays, click the Disable
  Breakpoint command

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Using the Autos Window

• Click the Start button on the Standard toolbar
• Click the Enter Todays Sales button. Enter the
  test data in table 8-4 on page VB 8.26 and click
  the OK button after entering the second item,
  without entering a description in the Item
  Description text box
• Click the Total Todays Sales button to determine
  if the application displays the expected results
  in the Daily Sales Totals message box

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Using the Autos Window

• Click the breakpoint status check box in the
  Breakpoints window to enable the breakpoint on
  line 175
• Click the Todays Sales Check application button
  on the Windows taskbar. When the Todays Sales
  Check window displays, click the OK button in the
  Daily Sales Totals message box. Click the Total
  Todays Sales button. When VB .NET enters break
  mode, press the F8 key eight times
• Click the Autos tab at the bottom of the IDE

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Fixing a Logic Error

• Click the Stop Debugging button on the Debug
  toolbar
• Change the index of the SubItems item in line 185
  from the value, 2, to the value, 3
• Right-click anywhere in line 175 and then click
  Disable Breakpoint on the code window shortcut
  menu

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Using the Locals Window to Evaluate Variables

• Click the Start button on the Standard toolbar
• Click the Enter Todays Sales button. Enter the
  test data in table 8-4 on page VB 8.26 and click
  the OK button after entering the second item,
  without entering a description in the Item
  Description text box
• Click the Total Todays Sales button to determine
  if the application displays the expected results
  in the Daily Sales Totals message box

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Using the Locals Window to Evaluate Variables

• Click the breakpoint status check box in the
  Breakpoints window to enable the breakpoint on
  line 175
• Click the Todays Sales Check application button
  in the Windows taskbar. When the Todays Sales
  Check window appears, click the OK button in the
  Daily Sales Totals message box. Click the Total
  Todays Sales button, and click the Locals tab at
  the bottom of the IDE
• Scroll the variable list in the Locals window
  until the intListCount variable displays. Press
  F8 nine times

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Fixing an Assignment Logic Error

• Click the Stop Debugging button on the Debug
  toolbar
• Select the variable, sngTotalAdvertised, on the
  right side of the assignment statement in line
  186. Type sngItemSales to replace the variable,
  sngTotalAdvertised
• Right-click anywhere in line 175 and then click
  Disable Breakpoint on the code window shortcut
  menu
• Test and save the project, using the test data on
  page VB 8.26 in table 8-4

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Using the Command Window Entering Commands

• Right-click the filled red circle icon to the
  left of line 175 and then click Disable
  Breakpoint. Click the empty red circle icon to
  the left of line 213 to enable the breakpoint at
  line 213, and press F5 to enter run time
• Click the Debug menu and point to the Windows
  command. Click the Immediate command on the
  Windows submenu
• At the insertion point in the Command window,
  type ?intColumn0Width and then press the ENTER key

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Using the Command Window Entering Commands

• Press the F8 key to execute line 213. Type
  ?intColumn0Width in the Command window and then
  press the ENTER key
• Type gtcmd in the Command window and then press
  the ENTER key
• Enter Debug.sto in the Command window, as shown
  in figure 8-54 on page VB 8.53
• Click the Debug.StopDebugging command in the
  Intellisense list and then press the ENTER key

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Creating an Executable File

• Click the Todays Sales Check project in the
  Solution Explorer window. Click the Property
  Pages icon on the Properties toolbar in the
  Properties window. When the Todays Sales Check
  Property Pages appear, click the Build item in
  the Command Properties folder
• Click the Application icon ellipsis button.
  Select the CHECKMRK.ICO file located in the same
  folder as the project file, and click Open
• Click the Configuration Properties folder
• Click the OK button

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Creating an Executable File

• Click the Solution Configurations box arrow on
  the Standard toolbar. Select Release in the
  Solution Configurations list. Click Build on the
  menu bar
• Click the Build Solution command on the Build
  menu
• Open Windows Explorer and navigate to the folder,
  A\Chapter8\Todays Sales Check\Todays Sales
  Check\bin
• Click the Windows Explorer Close button. In the
  VB .NET IDE, click File on the menu bar and then
  click Close Solution

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Creating a Setup Project and Adding an Executable
File

• With the Todays Sales Check solution closed,
  click Project on the New submenu of the File
  menu. When the New Project dialog box appears,
  select Setup and Deployment Projects in the
  Project types box. Enter Todays Sales Check
  Setup in the Name text box and then click the
  Setup Project icon in the Templates box

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Creating a Setup Project and Adding an Executable
File

• Click the OK button. After VB .NET creates the
  new project, right-click the Application Folder
  folder in the File System window. When the
  shortcut menu appears, point to the Add command
• Click the File command on the Add submenu. When
  the Add Files dialog box appears, navigate to
  A\Chapter8\Todays Sales Check\Todays Sales
  Check\bin and select the executable file (with
  the checkmark icon)
• Click the Open button

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Creating a Startup Menu Shortcut

• Right-click the Users Programs Menu folder in
  the Folders window. Click the Add command on the
  Users Programs Menu shortcut menu
• Click the Folder command. When the new folder
  displays in the Folders window, type Todays Sales
  Check as the folder name and then press the ENTER
  key
• Right-click anywhere in the Files window

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Creating a Startup Menu Shortcut

• Click the Create New Shortcut command. When the
  Select Item in Project dialog box appears,
  double-click the Application Folder folder
• Click the OK button. In the Files window, type
  Todays Sales Check as the name for the shortcut
• Click the Icon property value in the Properties
  window. Click the Icon property box arrow and
  then click Browse in the Icon property values list

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Creating a Startup Menu Shortcut

• When the icon dialog box appears, click the
  Browse button. When the Select Item in Project
  dialog box appears, double-click the Application
  Folder folder
• Select Executable Files (.exe) in the Files of
  type list. Click the Todays Sales Check.exe file
  and then click the OK button
• Click the OK button in the Icon dialog box

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Setting Options and Building a Setup Program

• Click the Todays Sales Check Setup project in the
  Solution Explorer window. Then, click the
  Property Pages button in the Properties window
• When the Property Pages window appears, click the
  Bootstrapper box arrow
• Click None in the Bootstrapper list. Click the
  OK button

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Setting Options and Building a Setup Program

• When the Property Pages window closes, click the
  Build Solution command on the Build menu
• When the Output window indicates that the build
  is complete, close Visual Basic .NET

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Testing a Setup Program

• Open Windows Explorer and navigate to the folder,
  A\Chapter8\Todays Sales Check Setup\Todays Sales
  Check Setup\Debug
• Double-click the Todays Sales Check Setup Windows
  Installer Package icon
• Click the Next button in the three subsequent
  dialog boxes

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Testing a Setup Program

• When the Todays Sales Check Setup dialog box
  displays the Installation Complete message, click
  the Close button
• Click the Start button on the taskbar and then
  point to All Programs on the Start menu. When
  the All Programs submenu appears, point to the
  Todays Sales Check command

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Summary

• Describe the difference between syntax, logic,
  and run-time errors
• Find syntax errors during design time
• Fund run-time errors and logic errors during run
  time
• Set breakpoints
• Execute one statement at a time by stepping

48
Summary

• Set the next statement to execute
• Evaluate variables using DataTips
• Evaluate variables and expressions using the
  QuickWatch and Watch windows
• Change values of variables using debug tools
• Use the Autos, Locals, and Me windows to examine
  variables and objects

49
Summary

• Use the Command window to execute commands
• Set the icon for an executable file
• Create an executable file
• Create a setup program to distribute a Windows
  application

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Chapter 8 Complete