Beginning ASP.NET 4.5 in CSharp and VB Opsylum

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672 x CHAPTER 17 PERSONALIZING WEBSITES The code then continues to copy over the existing, anonymous profile properties from the old to the new profile. In this example, only one property—called AnonymousProperty—is copied. However, you can modify the code to copy more properties. Note that there is no point in copying over properties that are not accessible by anonymous users. Those types of properties cannot have been set previously, so there’s nothing to copy. The final three lines of code then delete the old profile, clear the anonymous user ID from the cookie and, finally, delete the old, anonymous user account from the database. When this code has finished, the old profile is migrated successfully to the new profile, and all the old profile stuff has been successfully deleted from the database and the user’s cookies. The ProfileManager class—which lives in the System.Web.Profile namespace that you need to import for the previous example to work—provides you with more useful methods to work with Profile. For example, you can use DeleteInactiveProfiles to delete profiles for users who have been inactive for a certain amount of time. For detailed information about the ProfileManager class, look at this MSDN web page: http://tinyurl.com/ManageProfile4-5. Looking at Other Users’ Profiles The examples you have seen so far use Profile to access data for the current user. However, what if you need to display data for a different user? For example, what if you wanted to display a user’s biography below a Gig Pics album? You won’t be able to use the Profile property of the Page class in this case directly because it provides information about the current user, not about the user who created the photo album. To solve this problem, the ProfileCommon class, the base class of the underlying type of the Profile property of the Page class, comes with a GetProfile method. The GetProfile method retrieves an existing profile from the database if the name passed to it exists, or it creates a brand new profile if it doesn’t exist yet. For example, to get the profile of a user with a username of Carmen, you can use this code: VB.NET Dim theProfile As ProfileCommon = Profile.GetProfile("Carmen") C# ProfileCommon theProfile = Profile.GetProfile("Carmen"); With the Profile instance created, you can access its properties as you are used to. The following code assigns the Bio property of Carmen’s profile to the Text property of a Label control: VB.NET BioLabel.Text = theProfile.Bio C# BioLabel.Text = theProfile.Bio; Being able to read someone else’s profile is extremely useful. You can use it to show some of the properties of the profile to other users, as you see in the final exercise of this chapter. However, you can also use similar code to update other users’ profiles. For example, you could create a page in the
Other Ways of Dealing with Profile x 673 Management section that enables you to manage the profiles of the users that registered at your site. When you do modify other users’ profiles, be sure to call the Save method when you’re done. As you learned earlier, changes to the profile are normally persisted in the database automatically. However, this applies only to the profile of the current user. To change and persist the previously retrieved profile, you can use this code: VB.NET theProfile.Bio = "New Bio for the Carmen account here" theProfile.Save() C# theProfile.Bio = "New Bio for the Carmen account here"; theProfile.Save(); In the following exercise, you put some of this into practice when you show the name of the user who created a specific photo album, together with the biography of the user. TRY IT OUT Working with Other Users’ Profiles The Default.aspx page in the PhotoAlbums folder displays the pictures in a specific photo album. You can’t see which user created the photo album, so that would be a nice new feature. And to further improve the page, you can also display the user’s biography. In this Try It Out, you see how to implement both features. 1. From the PhotoAlbums folder, open the Default.aspx page in Markup View. Scroll down and locate the two breaks and the HyperLink to edit the album you added earlier. Just before the breaks and the HyperLink control, drag a PlaceHolder control from the Toolbox and set its ID to PhotoAlbumDetails. Inside this PlaceHolder, drag two Label controls and then modify the code manually so it ends up like this: Photo Album Details Created by: About this user: 2. Switch to the Code Behind of the page (press F7) and locate the DataBound event handler for the ListView control. Right after the nested if statement that hides the HyperLink control when the user doesn’t have the necessary permissions, add these lines of code that retrieve the profile for the user who created the photo album and then update the relevant labels: VB.NET EditLink.Visible = False End If If Not String.IsNullOrEmpty(photoAlbumOwner) Then
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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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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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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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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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10 ASP.NET AJAX WHAT YOU WILL LEARN
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Using ASP.NET AJAX in Your Projects
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14 LINQ and the ADO.NET Entity Fram
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Mapping Your Data Model to an Objec
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Summary x 551 model. Combined with
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Formatting Your Controls Using Styl
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Handling Events x 563 background-im
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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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BConfiguring SQL Server 2012 So far
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allowAnonymous attribute - ASP.NET
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text strings - types validation con
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web services - Where clause flow of
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