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Microsoft Visual Studio 2010: A Beginner s Guide
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Figure 2-5 The Options window
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Figure 2-6 C# code editor options
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2: Learning Just Enough C# or VBNET: Basic Syntax
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The Options window in Figure 2-6 is opened to Text Editor, C#, Formatting New Lines As you can see, there are very detailed settings for even how the editor automatically formats new lines and where braces appear If the code doesn t format the way you want it to, visit this page to set the options to what you please
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Saving Time with Snippets
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Snippets are important to learn because they will save you time A snippet is a set of keystrokes that form a template for a piece of code The code for a snippet is typically something that is common in normal programming You ll see many common statements and blocks of code in this chapter, many of which have associated snippets This section shows you the mechanics of using snippets, and you ll see more examples throughout the rest of this chapter To use a snippet, begin typing the snippet prefix until the snippet acronym appears in the Intellisense completion list, press the TAB key twice, and fill in the snippet form while tabbing through each field Press ENTER when you re done Since you ve already learned about namespaces, I ll show you the namespace snippet To start, open any code file and click to start typing in a part of the file outside of all code blocks, such as directly below any using statements but above any existing namespace statements Type the letter n and watch the completion list go straight to the namespace element Type an a and you ll see the namespace alone in the completion list, as shown in Figure 2-7
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The CTRL-ALT-SPACE keystroke in Figure 2-7 switches between the Intellisense modes Consume First and Standard mode In Standard mode, which shows CTRL-ALT-SPACE, typing characters automatically selects keywords However, there are situations where you are trying to type a word that doesn t exist yet and Intellisense is too aggressive by adding the selected completion list item, instead of what you typed In those cases, you can press the CTRL-ALT-SPACE keys to go to Consume First mode and what you ve typed will be selected You can still use the DOWN ARROW key on your keyboard in Consume First mode to select the highlighted term in the completion list
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Figure 2-7 Using snippets
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Microsoft Visual Studio 2010: A Beginner s Guide
Figure 2-8 Filling in the Snippet template
You can identify snippets in the completion list by the torn paper icon At this point, you can press the TAB key to complete the namespace keyword Then press TAB again to produce a template where you can fill out the highlighted fields Figure 2-8 shows the results of creating a namespace snippet by typing n and pressing TAB, TAB As shown in Figure 2-8, you would type in the Namespace name in the highlighted form field to replace MyNamespace, which is placeholder text For templates with more fields, you would press the TAB key to move between fields In the case of the namespace shown in Figure 2-8, there is only one field in the template to complete VB offers a couple of ways to add snippets: by typing prefixes or via a pick list To see how VB snippets work, place your carat inside of the Module1 module, underneath End Main (not inside of the Main block) Type Su and press TAB, and notice that VS creates a Sub (method) along with a template containing a field for filling out the Sub snippet Another way to add VB snippets is to type a and press TAB You ll receive a pick list, as shown in Figure 2-9 You can navigate this pick list to find the snippet you need, as classified in one of the folders VB ships with many more built-in snippets than for C# Now that you know how to use snippets, let s move on to the different types of statements you can have in C# and VB and how snippets work with those statements
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