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The Visual Studio .NET and VB .NET Integrated Development Environment (IDE)

The Visual Studio .NET and VB .NET Integrated Development Environment (IDE). Lesson A. A Tour of the Integrated Development Environment. Objectives. Identify the three principal categories of Visual Basic .NET applications: Windows Forms applications Web Forms applications

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The Visual Studio .NET and VB .NET Integrated Development Environment (IDE)

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  1. The Visual Studio .NET and VB .NET Integrated Development Environment (IDE)

  2. Lesson A A Tour of the Integrated Development Environment

  3. Objectives • Identify the three principal categories of Visual Basic .NET applications: • Windows Forms applications • Web Forms applications • Console applications • Navigate through the Visual Studio .NET Integrated Development Environment’s (IDE) Main menu and toolbars • Understand the purpose of other major components of the IDE: • Code window, Class view • Task List, Output window • Server Explorer, and Help screens • Identify some of the key differences between Visual Basic .NET and earlier versions of Visual Basic

  4. A Tour of the Integrated Development Environment • Understanding Application Categories • The FGDT will develop three types of applications: • Windows Forms applications • Web Forms applications • Console applications • Understanding Visual Basic .NET Windows Forms Applications • User interface • Contained within traditional windows and the application executes entirely on the local machine • Any application running in a stand-alone environment is a good candidate for development as a Windows Forms application

  5. Start Page, New Project Dialog Box, with Windows Application Selected

  6. Understanding Visual Basic .NET Web Forms Applications • Visual Basic .NET Web Forms application • Uses the techniques and protocols of the World Wide Web • Interface is designed as an HTML or XML document • End user’s Web browser renders the HTML/XML/ASP document on the local machine • Application executes mostly on a server • Data access occurs over a network through an XML Web service • Technology can also be applied to applications on a stand-alone machine

  7. New Project Dialog Box Showing the ASP .NET Web Application Selected

  8. Understanding Visual Basic .NET Console Applications • Visual Basic .NET Console application • Text-only application • Compiled into an executable • Run from a command prompt • Console applications • Support system utility functions • More useful to systems programmer than applications programmer

  9. New Project Dialog Box with Console Application Selected Under Templates

  10. Understanding the Main Menu • Main menu • Provides access to all the items you need in the IDE • Using the File Menu • New • Opens a new project, file, or blank solution • Open • Opens an existing project or file • Close • Closes the file currently displayed in the main window • Add New Item • Opens the Add New Item dialog box

  11. Add New Item Dialog Box Showing All Local Project Items

  12. Using the File Menu (Continued) • Add Existing Item • Adds an existing file to the current project • Add Project • Adds another project to the current solution • Open Solution • Opens a new solution • Close Solution • Closes the current solution

  13. Using the File Menu (Continued) • Save, Save As, Save All • Saves currently selected component • Saves currently selected component under different name or in different location • Saves all components • Source Control • Not installed in Visual Studio .NET Professional Edition • Allows organization to control multiple versions of software • Page Setup and Print • Selects settings for printing source code • Recent Files and Projects • Shortcut for opening the most recently opened files and projects • Exit • Exits Visual Studio .NET

  14. Using the Edit Menu • Insert File As Text • Useful if you have saved a block of code as a text file • Advanced • Used for formatting code blocks • Bookmarks • Where you place your reminders and locators • Outlining • Enables you to create an outline for code • IntelliSense • Provides automatic statement completion and immediate assistance while coding

  15. Using the View Menu • Web Browser | Show Browser • Displays the most recent HTML page • Other Windows | Object Browser • Displays the objects in the active project or the available objects in Visual Studio .NET • Other Windows | Output • Displays output (error) messages from the most recent compilation • Tab Order • Toggle for displaying the TabIndex property of every control on the currently displayed form • Show Tasks • Navigates among the tasks in the project Task List • Toolbars • Displays a submenu with 24 toolbars

  16. Viewing the Tab Order of the Village Housing Application

  17. Using the View Menu (Continued) • Full Screen • Enables you to toggle the main window between full screen and Normal view • Navigate Backward or Navigate Forward • Changes main window display to previous display or returns to current display • Property Pages • Opens the Property Pages dialog box • Application icon property • Designates an icon to represent the project while it is running • Option Explicit • Requires that all variables be explicitly declared • Option Strict • Requires that all narrowing conversions be explicitly declared and that late bindings not be allowed • Option Compare • Allows settings of Binary (the default) or Text

  18. Property Pages - Common Properties -Build

  19. Understanding the Main Menu (Continued) • Exploring the Project Menu • Under the Project menu, Add New Item and Add Existing Item duplicate selections available in the File menu • Exclude From Project removes currently selected component from current project • Understanding the Build Menu • Menu is useful when you need to compile a solution without executing it

  20. Understanding the Debug Menu • Breakpoint • A place in your code where program execution is suspended (not terminated) • Debug selections • Windows | Breakpoints • Windows | Autos • Windows | Immediate • Start • Continue • Stop Debugging • Step Into • QuickWatch • Clear All Breakpoints • Disable All Breakpoints

  21. Exploring the Help Menu • Dynamic Help • Displays a short list of topics related to whatever you are currently doing in the IDE • Contents • Opens the table of contents for the Visual Basic .NET Help collection • Index • Opens a search frame that enables you to enter a keyword and look for that keyword throughout the Help Collection Index • Search • Opens a search frame that enables the user to enter a word and find it anywhere in the Help collection

  22. Understanding Other IDE Components • Understanding the Main Window • Tabs at the top of the screen space identify open windows • Initial choices include the Start Page, the Code window, the Designer window, and the current Help screen • Understanding Toolbars • Toolbars provide a one-click shortcut to menu selections • Standard toolbar always visible • Understanding the Class View • Class view enables you to examine all the symbols used in your application, or available to your application

  23. Understanding Other IDE Components (Continued) • Understanding the Properties window • Read-only properties are disabled • Expansion button appears to the left of group-level properties • Complex properties can be set by clicking an ellipsis • When you can select from a list of property setting choices, the Settings box is a combo box with a down arrow that lists the choices • Property window has its own toolbar • Understanding the Output window • Output window displays messages to you from the IDE

  24. Understanding Other IDE Components (Continued) • Understanding the Toolbox • Toolbox is subdivided by tabs, and the particular tabs available depend on the contents of the main window • Data tab • Components tab • Windows Forms tab • Understanding Server Explorer • Server Explorer opens and manages data connections to both internal and external databases and related services

  25. Lesson B A First Windows Forms Application

  26. Objectives • Make practical use of the View menu and the Debug menu • Create controls on a Windows form using the Toolbox • Develop and implement a splash screen, both as a Windows Forms application and as a Web Forms application

  27. Experimenting with the Debug Menu • To experience the Debug menu within the Visual Studio IDE: • Open the VisualTour project (if necessary). In Solution Explorer, click frmTour.vb, and click the View Code button to open the Code window • At the end of the Private Sub btnClickMe_MouseEnter event procedure, click anywhere on the last line (End Sub), and press F9 • Click Debug on the Main menu, and note the menu items available at design time. Click Windows on the Debug menu, and note the menu items available • In Form Designer, click Timer1 in the tray underneath the form. Then click the Enabled property in the Properties window, and set it to False • Select Start from the Debug menu, or click the Start button to initiate execution of the Visual Tour application • Again, select Debug on the Main menu, and note the many different menu items available at runtime. Click Windows on the Debug menu, and note the menu items available • From the Windows taskbar, click the Visual Tour running application. Move the cursor over the Touch Here button

  28. Completed frmTour at Design Time

  29. Completed frmWelcome

  30. Lesson C A First Console Application

  31. Objectives • Build a Visual Basic .NET Console application • Use the Visual Basic .NET random number generator

  32. Building Random Numbers: a Console Application • Console application • A way of experimenting with snippets of code, without having to design an entire GUI • Output can be sent to the console object or to the Debug object • Write ( ) function writes to the specified device, but leaves the print cursor positioned immediately after the last character written • WriteLine ( ) function writes to the specified device, and then writes a carriage return/linefeed sequence

  33. Building Random Numbers: a Console Application (Continued) • Rnd( ) • A pseudorandom number generator • Produces a random real number n such that 0 <= n < 1 • Works by performing a calculation on the previous number that it produced • Random seed • Used with the first Rnd( ) function call • By default the seed is the same whenever a program begins execution • Randomize( ) • Seeds the random number generator based on the setting of the system clock

  34. Building Random Numbers: a Console Application (Continued) • Formula for converting the Rnd( ) return value to an integer within a specified range • Int(Rnd() * (UpperBound – LowerBound + 1) + LowerBound) • Valuable feature in certain applications • Generating the same sequence of random numbers each time a program runs, as Rnd( ) does

  35. Code to Produce 100 Random Index Values

  36. Console Results - 100 randomly Selected Index Values

  37. Other Notes Concerning Console Applications • Console applications • Often compiled and subsequently executed from the command prompt • Output sent to the Console object appears in the command window • Output sent to the Debug object is ignored and does not raise an exception • If keyboard input is required • ReadLine( ) function is employed

  38. Code to Read and Display Variables

  39. Summary • Visual Basic .NET Windows Forms application • Application involving a traditional Windows-style user interface • Implemented entirely on a local computer • Visual Basic .NET Web Forms application • Application involving a Web-style interface • Visual Basic .NET Console application • Local, text-only application that runs from a command prompt • Visual Basic .NET Integrated Development Environment • Includes multiple views and windows • Provides extensive debugging facilities • Provides an extensive Help system

  40. Summary (Continued) • Conventional prefixes • frm: Windows form • web: Web form • btn: Button • lbl: Label • Windows form properties • Name, BackColor, BackgroundImage, ControlBox • FormBorderStyle, Icon, Size, StartPosition, and Text • In the Code Editor • Class Name combo box identifies the objects in the form • Method Name combo box lists the events and methods available to the currently selected object • Web form properties • Background, bgcolor, and pagelayout

  41. Summary (Continued) • Console applications • Most useful for experimenting with program code • Rnd ( ) and Randomize ( ) functions • Provide the capability to generate and manage random numbers • Output from Console application • Normally sent to the Console object or to the Debug object • Input in a Console application • Obtained from the Console.ReadLine ( ) function

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