Beginning ASP.NET 4.5 in CSharp and VB Opsylum

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272 x CHAPTER 7 NAVIGATION VB.NET item.Selected = True End If End If End If Select Case Page.Theme.ToLower() Case "darkgrey" Menu1.Visible = False TreeView1.Visible = True Case Else Menu1.Visible = True TreeView1.Visible = False End Select End Sub C# item.Selected = true; } } } switch (Page.Theme.ToLower()) { case "darkgrey": Menu1.Visible = false; TreeView1.Visible = true; break; default: Menu1.Visible = true; TreeView1.Visible = false; break; } } 6. Save all changes and open Default.aspx in the browser. Depending on your currently active theme, you should see either the Menu or the TreeView control. Select a different theme from the list and the page will reload, now showing the other control as the navigation system of the website (see Figure 7-10). COMMON MISTAKES If you get an error from the code in the BasePage class that checks the title, make sure you set a valid theme in the element in the Web.config file. If the theme seems to switch when you move from one page to another, make sure your pages inherit BasePage, which should be the case if you based the new pages on your custom template.
Using the Navigation Controls x 273 FIGURE 7-10 How It Works Just like the Menu control, the TreeView control can get its data from a SiteMapDataSource control, which in turn gets its information from the Web.sitemap file. By default, the TreeView shows plus and minus signs to indicate that items can be collapsed and expanded. For a site menu this may not make much sense, so by setting ShowExpandCollapse to False, you effectively hide the images. The TreeView enables you to set a number of style properties, including the NodeStyle, RootNodeStyle, and LevelStyles that influence the appearance of individual items in the tree. In this exercise, you used LevelStyles to apply a class called FirstLevelMenuItems that adds some room above each item at the top level, such as Home and Reviews. The code in the Code Behind of the master page looks at the current theme by investigating the Theme property of the Page. When DarkGrey is the current theme, the code hides the Menu and then displays the TreeView. In the Case Else / default block the reverse is true. This means that for the Monochrome theme and all future themes you may add, the TreeView is hidden and the Menu is used instead as the navigation system. The TreeView still suffers from the same problems as the Menu control in previous versions of ASP.NET in that it generates a lot of bloated HTML. Unfortunately, this control has no RenderingMode property, so if you’re using the TreeView you’re stuck with the table-based HTML.
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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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66 x CHAPTER 3 DESIGNING YOUR WEB P
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100 x CHAPTER 3 DESIGNING YOUR WEB
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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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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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392 x CHAPTER 11 JQUERY In addition
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394 x CHAPTER 11 JQUERY COMMON MIST
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396 x CHAPTER 11 JQUERY can apply v
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398 x CHAPTER 11 JQUERY The ID Sele
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400 x CHAPTER 11 JQUERY The first s
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412 x CHAPTER 11 JQUERY 8. Open the
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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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422 x CHAPTER 12 INTRODUCTION TO DA
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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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Introducing Query Syntax x 513 diff
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Introducing Query Syntax x 515 Orde
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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 Security x 605 Authoriz
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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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680 x CHAPTER 18 EXCEPTION HANDLING
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730 x CHAPTER 19 DEPLOYING YOUR WEB
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790 x APPENDIX A EXERCISE ANSWERS }
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BConfiguring SQL Server 2012 So far
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Configuring SQL Server 2012 x 795 C
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Configuring SQL Server 2012 x 797 Y
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allowAnonymous attribute - ASP.NET
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input controls - handling input co
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Profile.GetProfile - ReadAllText me
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SQL statement - styling installing,
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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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