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CHAPTER 15 OUR EMPIRE UNITED
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Figure 15-4. Our site so far Although I know that this is massively impressive and your mind can barely grasp the power you now possess, we still need to do more. For example, we have no navigation yet. Let s fix that.
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Exercise 15-3. Improving the Site: Step 2
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In this exercise, you will manipulate the built-in QuickLaunch menu and the top navigation bar. You will do this using .NET code because it gives you nice insights into how the navigation works. Plus, it is more flexible to do this through code. 1. In the FeatureActivated method of the TimesSetup.cs file, add the following code after any existing code: // Quicklaunch navigation SPNavigationNodeCollection quickLaunch = web.Navigation.QuickLaunch; for (int i = 0; i < quickLaunch.Count; i++) { quickLaunch[0].Delete(); } This code removes any existing QuickLaunch menu items.
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CHAPTER 15 OUR EMPIRE UNITED
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2. Continue by adding a root menu item as such: SPNavigationNode aboutUs = new SPNavigationNode("About us", "/"); quickLaunch.AddAsFirst(aboutUs); The SPNavigationNode constructor in this case takes two parameters. The first is the text to be linked, and the second is the URL to which the link will go. The constructor may also take a third parameter, a Boolean that is set to True to signify that the link is an absolute URL rather than a relative URL.
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Note If you use a relative URL like we are doing here, SharePoint will check whether the URL goes to an
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existing page and will throw an exception if the page does not exist.
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Next we simply add the SPNavigationNode to the QuickLaunch menu. But we want more, right Let s add some child elements. 3. Add the following code after the previous lines: SPNavigationNode contact = new SPNavigationNode("Contact form", "/"); aboutUs.Children.AddAsFirst(contact); SPNavigationNode map = new SPNavigationNode("Map", "/"); aboutUs.Children.Add(map, contact); Note the use of two different methods for adding the first and second nodes. In the Add method of SPNavigationNodeCollection, like the Children property is here, you need to specify both the node to add and the preceding node. Here we add the contact node first, but since it is the first node, we can use the AddAsFirst method. The same applies to the quicklaunch object we got in step 1. The first item is added with quicklaunch.AddAsFirst, and any subsequent items are added using the Add method. Go ahead and explore this if you like. For now you can build, deploy or upgrade, and then recycle IIS. Yes, you need to recycle IIS to avoid assembly caching. Then deactivate and reactivate the setup feature.
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Can t reactivate the feature Getting errors about already existing features I know, I know, we have already activated the feature that in turn activated all the other required features of our solution. Not just that, but if you deactivate the features, you still get an error since one of the features, TimesArticleCategoryList, will try to create a list that already exists. There is a simple fix. Just modify your feature activate code, and check to see whether the feature is already activated: if (web.Features[g] == null) web.Features.Add(g); Similarly, for site-scoped features, you can use this: if (web.Site.Features[g] == null) web.Site.Features.Add(g);
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CHAPTER 15 OUR EMPIRE UNITED
You may wonder why I did not tell you about this right away. Well, it is easier to remember a fix for a problem you experience than just an explanation that something will go wrong if you don t do something. Now you can try to reactivate your setup feature and see what happens. Back on your front page, you should now see something resembling Figure 15-5.
Figure 15-5. QuickLaunch in place We should move on. Let s see whether you can guess what s up next.
Exercise 15-4. Improving the Site: Step 3
Yeah, that s right campers; it is time to put the final piece of our puzzle in place, the top navigation bar. I can hear you all crying that we are almost finished and there is no more book left. Well, dry your eyes, matey; this ship is coming to port. 1. In the TimesSetup.cs file, in the same place as the previous two exercises, add the following code: SPNavigationNodeCollection topNavigationBar = web.Navigation.TopNavigationBar; for (int i = 0; i < topNavigationBar.Count; i++) { topNavigationBar[0].Delete(); } As for the QuickLaunch example, this simply makes sure we empty any existing items in the menu. 2. Continue with this code, which is again rather similar to the previous example: SPNavigationNode newsNode = new SPNavigationNode("News", "categories.aspx"); topNavigationBar.AddAsFirst(newsNode); Note that I have linked the News item to the categories.aspx page. I ll show you why in a moment. 3. You ll want more items. Add some! Such as: // Horizontal items SPNavigationNode localNews = new SPNavigationNode("Local news", "/"); newsNode.Children.AddAsFirst(localNews);
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