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C# Tutorial MSM_Murach chapter-11-slides

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C# Tutorial MSM_Murach chapter-11-slides

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C# Tutorial MSM_Murach chapter-11-slides

  1. 1. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 1 Chapter 11 How to debug an application
  2. 2. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 2 Objectives Applied 1. Use the debugging techniques presented in this chapter to debug any unhandled exceptions or logical errors in the applications that you develop. Knowledge 1. Describe the differences between the three Step commands that you can use to control the execution of an application. 2. Describe the primary differences between the Autos window, the Locals window, and the Watch window. 3. Describe the use of the Immediate window. 4. Describe the call stack that’s displayed in the Call Stack window. 5. Explain how you can use the Console class to display information in the Output window.
  3. 3. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 3 The Options dialog box
  4. 4. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 4 The Exceptions dialog box
  5. 5. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 5 The Future Value application in break mode
  6. 6. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 6 Four ways to enter break mode • Force an unhandled exception to be thrown. • Set a breakpoint and run the application. • Choose the DebugStep Into command or press F11 to begin debugging at the first line of the application. • Choose the DebugBreak All command or press Ctrl+Alt+Break while the application is executing.
  7. 7. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 7 The Future Value application with a data tip displayed
  8. 8. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 8 The Future Value application with a breakpoint
  9. 9. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 9 How to set and clear breakpoints • To set a breakpoint, click in the margin indicator bar to the left of a statement. Or, press the F9 key to set a breakpoint at the insertion point. • You can set a breakpoint before you run an application or while the application is in break mode. • To remove a breakpoint, use either technique for setting a breakpoint. To remove all breakpoints at once, use the DebugDelete All Breakpoints command. • To disable or enable all breakpoints at once, use the DebugDisable All Breakpoints or DebugEnable All Breakpoints command. Express Edition difference • The Breakpoints window is not available from Visual C# 2010 Express Edition.
  10. 10. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 10 Commands in the Debug menu and toolbar Command Toolbar Keyboard Start/Continue F5 Break All Ctrl+Alt+Break Stop Debugging Shift+F5 Restart Ctrl+Shift+F5 Show Next Statement Step Into F11 Step Over F10 Step Out Shift+F11
  11. 11. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 11 Commands in the Code Editor’s shortcut menu Command Description Run to Cursor Execute the application until it reaches the statement that contains the insertion point. Set Next Statement Set the statement that contains the insertion point as the next statement to be executed.
  12. 12. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 12 The Locals window
  13. 13. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 13 How to use the Locals window • The Locals window displays information about the variables within the current scope. • To display the Locals window, use the DebugWindowsLocals command. • If you are debugging a form and you click on the plus sign to the left of the this keyword, the properties and variables of the form are displayed. • To change the value of a property or variable, double-click on the value in the Value column, then type a new value and press the Enter key.
  14. 14. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 14 How to use the Autos window • The Autos window works like the Locals window, but it only displays information about variables used by the current statement and the previous statement. • To display the Autos window, you can use the DebugWindowsAutos command. Express Edition difference • The Autos window isn’t available from the Visual C# 2010 Express Edition.
  15. 15. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 15 A Watch window* *The Express Edition offers just one Watch window named Watch.
  16. 16. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 16 The Immediate window
  17. 17. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 17 The Call Stack window
  18. 18. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 18 The Call Hierarchy window with two methods displayed
  19. 19. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 19 An Output window that shows debug information
  20. 20. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 20 An Output window that shows build information
  21. 21. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 21 An Output window with debugging information
  22. 22. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 22 Methods of the Console class that write data to the Output window Method Description Write(string) Displays the value of the specified string. WriteLine(string) Displays the value of the specified string, followed by a line break. 3 statements that write data to the Output window Console.WriteLine("Entering CalculateFutureValue method..."); Console.WriteLine("month: " + (i+1)); Console.WriteLine("futureValue: " + futureValue); Code that uses an if statement to control when data is written if ((i+1)%12 == 0) // every 12 months Console.WriteLine("futureValue: " + futureValue);
  23. 23. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 23 The Visualizer drop-down menu in the Locals window
  24. 24. Murach’s C# 2010, C11 © 2010, Mike Murach & Associates, Inc. Slide 24 The Text Visualizer dialog box

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