Beginning ASP.NET 4.5 in CSharp and VB Opsylum

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780 x APPENDIX A EXERCISE ANSWERS Exercise 2 Solution The slideUp method hides elements by slowly decreasing their height. slideDown shows hidden elements instead by doing the reverse: slowly increasing the height of an element until it’s fully visible. Both methods accept, among other arguments, a speed parameter that either accepts a fixed value (slow, normal, or fast) or a number specifying the speed of the animation in milliseconds. Exercise 3 Solution jQuery’s document ready function fires when the page is finished loading in the browser, only during the initial request. The pageLoad method fires both when the page first loads and after an asynchronous postback, for example, when using an UpdatePanel. This difference enables you to choose the desired behavior. Need to fire some code on initial load and after a postback? Choose pageLoad. Otherwise, choose jQuery’s document ready function. Exercise 4 Solution You use the special _references.js file in the Scripts folder to enable IntelliSense. VS will read this file and parse all JavaScript files that you added with this syntax: /// This way, you get IntelliSense in files where it would otherwise not be supported (such as user controls) or for JavaScript files that you’re not directly linking to in your website. CHAPTER 12 Exercise 1 Solution The DELETE statement fails because there is a relationship between the Id of the Genre table and the GenreId of the Review table. As long as this relationship is in effect, you cannot delete genres that still have reviews attached to them. To be able to delete the requested genre, you need to delete the associated reviews first, or assign them to a different genre using an UPDATE statement. Exercise 4 shows you how you can accomplish this. Exercise 2 Solution The relationship between the Genre and Review tables is a one-way relationship. The relationship enforces that the GenreId assigned to a review must exist as an Id in the Genre table. At the same time, it blocks you from deleting genres that have reviews attached to them. However, the relationship doesn’t stop you from deleting rows from the Review table. Exercise 3 Solution To delete reviews with an Id of 100 or less, you need the following SQL statement: DELETE FROM Review WHERE Id
Chapter 13 x 781 Exercise 4 Solution Before you can delete the genre, you need to reassign the existing reviews to a new genre first. You can do this with the following UPDATE statement: UPDATE Review SET GenreId = 11 WHERE GenreId = 4 This assigns the GenreId of 11 to all reviews that previously had their GenreId set to 4. This in turn means that the genre with an Id of 4 no longer has any reviews attached to it, so you can now remove it with the following SQL statement: DELETE FROM Genre WHERE Id = 4 Exercise 5 Solution To update the name you need to execute an UPDATE statement. To limit the number of affected rows to just the Rock genre, you need to use a WHERE clause. You can use the WHERE clause to filter the rows based on the genre’s Id or on its Name. The following SQL statements are functionally equivalent: UPDATE Genre SET Name = 'Punk Rock' WHERE Id = 7 UPDATE Genre SET Name = 'Punk Rock' WHERE Name = 'Rock' This code assumes that the current Rock genre has an Id of 7. CHAPTER 13 Exercise 1 Solution The best control for this scenario is the GridView control. It’s easy to set up and has built-in support for paging, updating, and deleting of data. Together with a DetailsView control you can offer your users all four CRUD operations. To connect to your database you need to use a SqlDataSource control. Chapter 14 provides you with alternatives for both the GridView and the SqlDataSource. Exercise 2 Solution For a simple, unordered list, you’re probably best off using a Repeater control hooked up to a SqlDataSource control. The biggest benefit of the Repeater control is that it emits no HTML code of its own, enabling you to control the final markup. A downside of the control is that it doesn’t support editing or deletion of data, which isn’t a problem if all you need to do is present the data in a list. Chapter 14 shows you how to use the Repeater control. Exercise 3 Solution A BoundField is directly tied to a column in your data source and offers only limited ways to customize its appearance. The TemplateField, on the other hand, gives you full control over the way the field is rendered. As such, it’s an ideal field for more complex scenarios—for example, when you want to add validation controls to the page, or if you want to let the user work with a different control, like a DropDownList instead of the default TextBox.
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BEGINNING ASP.NET 4.5 FOREWORD . .
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BEGINNING ASP.NET 4.5 IN C# AND VB
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—To Niek
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CREDITS Acquisitions Editor Mary Ja
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CONTENTS FOREWORD INTRODUCTION xxxi
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CONTENTS Working with Files in Your
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CONTENTS Not All Controls Rely on V
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CONTENTS Skins 245 Creating a Skin
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CONTENTS Providing Feedback to User
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CONTENTS Single Item Controls 455 P
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CONTENTS Authentication: How Can Yo
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CONTENTS Introducing Bundling and M
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INTRODUCTION TO BUILD EFFECTIVE AND
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INTRODUCTION ‰ Chapter 4, “Work
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INTRODUCTION HOW THIS BOOK IS STRUC
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INTRODUCTION ‰ Code shown for the
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INTRODUCTION FIGURE I-2 The Site fo
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BEGINNING ASP.NET 4.5
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2 x CHAPTER 1 GETTING STARTED WITH
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34 x CHAPTER 2 BUILDING AN ASP.NET
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4Working with ASP.NET Server Contro
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Introduction to Server Controls x 1
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Introduction to Server Controls x 1
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A Closer Look at ASP.NET Server Con
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A Closer Look at ASP.NET Server Con
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Types of Controls x 117 FIGURE 4-4
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Types of Controls x 119 The Smart T
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Types of Controls x 121 } DropDownL
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Types of Controls x 123 Container C
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Types of Controls x 125 Note that t
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Types of Controls x 127 FIGURE 4-12
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Types of Controls x 129 FinishButto
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Types of Controls x 131 FileUpload
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Types of Controls x 133 Validation
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The ASP.NET State Engine x 135 serv
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The ASP.NET State Engine x 137 FIGU
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The ASP.NET State Engine x 139 4. A
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Practical Tips on Working with Cont
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Summary x 143 ⊲ WHAT YOU LEARNED
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146 x CHAPTER 5 PROGRAMMING YOUR AS
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6Creating Consistent Looking Websit
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Consistent Page Layout with Master
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Using a Centralized Base Page x 219
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Themes x 229 With this exported tem
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Themes x 231 Replace Theme with Sty
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Themes x 233 type="text/css" rel=
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Themes x 235 ASP.NET themes are not
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Themes x 237 FIGURE 6-19 How It Wor
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Themes x 239 VB.NET Dim myCookie As
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Themes x 241 FIGURE 6-21 Within the
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Themes x 243 C# preferredTheme.Valu
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Skins x 245 a cookie called Preferr
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Skins x 247 3. In the Extension box
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Practical Tips on Creating Consiste
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Summary x 251 The imaginary CSS cla
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7Navigation WHAT YOU WILL LEARN IN
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Different Ways to Move Around Your
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Using the Navigation Controls x 257
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Programmatic Redirection x 277 Redi
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Programmatic Redirection x 279 How
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Practical Tips on Navigation x 281
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286 x CHAPTER 8 USER CONTROLS advan
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10 ASP.NET AJAX WHAT YOU WILL LEARN
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Using ASP.NET AJAX in Your Projects
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Using Web Services and Page Methods
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Practical Ajax Tips x 381 How It Wo
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386 x CHAPTER 11 JQUERY Fortunately
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388 x CHAPTER 11 JQUERY FIGURE 11-1
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390 x CHAPTER 11 JQUERY This lists
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414 x CHAPTER 11 JQUERY As you saw
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416 x CHAPTER 11 JQUERY 7. Save you
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418 x CHAPTER 11 JQUERY look at jQu
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420 x CHAPTER 11 JQUERY ⊲ WHAT YO
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14 LINQ and the ADO.NET Entity Fram
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Introducing LINQ x 499 surprise tha
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Mapping Your Data Model to an Objec
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Introducing Query Syntax x 507 and
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Introducing Query Syntax x 509 Wher
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Introducing Query Syntax x 511 Firs
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Using Server Controls with LINQ Que
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Summary x 551 model. Combined with
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15 Working with Data — Advanced T
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Formatting Your Controls Using Styl
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Handling Events x 563 background-im
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Handling Events x 565 4. Make sure
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Handling Events x 567 The PreRender
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Handling Events x 569 Button1_Click
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Handling Events x 571 Select Case e
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Handling Events x 573 The RowDataBo
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Handling Events x 575 These classes
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Handling Events x 577 8. Save all y
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Hand-Coding Data Access Code x 579
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Caching x 589 In all the database e
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Caching x 591 Output Caching With o
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Caching x 593 Programmatic Caching
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Caching x 595 ‰ SummaryLabel ‰
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Caching x 597 } font-style: italic;
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Caching x 599 expiration date, whic
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Summary x 601 EXERCISES 1. Imagine
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16 Security in Your ASP.NET 4.5 Web
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Introducing the Login Controls x 60
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The Role Manager x 627 such as the
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The Role Manager x 629 1 . From wit
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The Role Manager x 631 FIGURE 16-19
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The Role Manager x 633 2. Save and
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The Role Manager x 635 Management s
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The Role Manager x 637 Alternativel
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The Role Manager x 639 } } case Lis
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Summary x 641 SUMMARY You can imple
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17 Personalizing Websites WHAT YOU
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Understanding Profile x 645 In the
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Understanding Profile x 647 You can
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Understanding Profile x 649 5. To t
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Understanding Profile x 651 To defi
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Understanding Profile x 653 press t
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Understanding Profile x 655 10. Dou
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Understanding Profile x 657 1. In M
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Understanding Profile x 659 e As Ev
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Understanding Profile x 661 That’
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Understanding Profile x 663 By clic
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Understanding Profile x 665 sent to
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Understanding Profile x 667 5. From
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Understanding Profile x 669 10. Ent
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Other Ways of Dealing with Profile
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Other Ways of Dealing with Profile
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Summary x 675 How It Works Much of
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text strings - types validation con
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validation controls- ViewState coll
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web services - Where clause flow of
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