how to generate barcode in c# web application Add the new view to the Views folder. Add a link to the top menu. Add functionality to the page. in VB.NET

Generating QR in VB.NET Add the new view to the Views folder. Add a link to the top menu. Add functionality to the page.

Add the new view to the Views folder. Add a link to the top menu. Add functionality to the page.
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The first step is as simple as dropping a new file into a folder. The second step involves some modification to MainPage.xaml; and the third step is what you d normally do in any application, so we ll skip it here.
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ADDING THE NEW VIEW
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Views are instances of the Silverlight Navigation Page class defined in the System. Windows.Controls.Navigation namespace. The Silverlight tools include a template for a blank page deriving from the navigation:Page class, a class which is essentially a UserControl that has been beefed up to support navigation. Right-click the Views folder, and select Add New Item. In the Add New Item dialog, select the Silverlight Page template, and name the file CustomerDetail.xaml. Figure 15.5 shows the Add New Item dialog with the correct selections.
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Figure 15.5 The Add New Item dialog with the Silverlight Page template selected. This is the template to be used for views in a Silverlight navigation application. I may have more templates than you; I ve installed some add-ins.
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The Navigation Application template
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After you ve added the new page, you need to provide a way for the end user to find it. In a regular desktop application, this may be a menu or toolbar. For this navigation application, you ll use a HyperlinkButton.
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ADDING THE LINK TO THE TOP MENU
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In this template, navigation to individual pages is accomplished by HyperlinkButton instances on MainPage.xaml. The pages themselves are loaded in the navigation: Frame element named ContentFrame. On MainPage.xaml is a Border named LinksBorder. This is the navigation menu that appears at upper right. The default XAML for this area is shown in listing 15.1.
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Listing 15.1 LinksBorder showing navigation menu
Result:
XAML:
<Border x:Name="LinksBorder" Style="{StaticResource LinksBorderStyle}"> <StackPanel x:Name="LinksStackPanel" Style="{StaticResource LinksStackPanelStyle}"> <HyperlinkButton x:Name="HomeLink" Style="{StaticResource LinkStyle}" NavigateUri="/Home" TargetName="ContentFrame" Content="home"/>
Page link
Your link goes here
<Rectangle Style="{StaticResource DividerStyle}"/> <HyperlinkButton x:Name="AboutLink" Style="{StaticResource LinkStyle}" NavigateUri="/About" TargetName="ContentFrame" Content="about"/> </StackPanel> </Border>
This Border contains the top menu navigation structure for the application. It s a simple StackPanel of elements: HyperlinkButton instances separated by vertical lines (narrow rectangles). Note that I removed the x:Name from the divider rectangle, because it s not needed. The names in the HyperlinkButton instances also aren t needed, but I gave them meaningful names to help with the discussion here, and in case you decide to do something with them in code. In your own project, you can remove the names if you d like. To add your own page to the navigation structure, you need to follow this pattern and add a divider rectangle (optional, but recommended) and a HyperlinkButton pointing to your page. Place this markup in the XAML in the spot indicated in the previous listing:
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Navigation and dialogs
<Rectangle Style="{StaticResource DividerStyle}" /> <HyperlinkButton x:Name="CustomerDetailLink" Style="{StaticResource LinkStyle}" NavigateUri="/CustomerDetail" TargetName="ContentFrame" Content="customer" />
When copying and pasting from the other links, I left the divider alone but changed a couple properties of the HyperlinkButton. The first is the x:Name property, which is optional because it s not used in any code, binding, or animation in the default template. The second is the Content. This is what will be displayed on the menu bar. You could easily use images rather than text if you d like. You re also free to change the LinkStyle resource to modify the appearance. The final property is the NavigateUri. That needed to be changed to point to the newly added page. You may have noticed that the URI for the page is set to /CustomerDetail, when the actual page is stored in /Views/CustomerDetail.xaml. This is handled by the URI mapper, which we ll cover later in this chapter. Although it isn t unique to the navigation API, one other nice feature of the navigation application is its ability to be easily styled or themed.
15.2.3 Changing the application theme
When the Silverlight team created the navigation template, they enlisted the help of an in-house designer to both ensure that the template could be themed and to create themes for use with it. Long after the release, the design team has continued to put out new themes, each more impressive than the last. You can get the set of templates that s current as of this writing by visiting http:// bit.ly/sltemplates and clicking the big download link at the top. Be sure to grab the VisualStudio2010 zip file, which contains the .vsix (Visual Studio Install Package) files for the themes. This will install a number of new project templates, one for each theme you install. Because you ve already started your project, you ll need to steal some theme files from another project. In another instance of Visual Studio, create a new Silverlight Navigation Application - Cosmopolitan Theme (or a different theme if you prefer) application. Save that. Then, find the folder where you stored that project, open it in Explorer, and drag all the contents except the SDKStyles.xaml and ToolkitStyles.xaml files from the Assets folder in the temp project into the Assets folder of your chapter project. Be sure to overwrite (or first rename) the old Styles.xaml file so you pick up the new one.
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