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If you need to specify paths where you will allow inline code to run, you need to modify the Tip
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web.config file and set the PageParserPaths element inside the SafeMode element of the SharePoint element in web.config. MSDN has an article describing this issue at http://www. understandingsharepoint.com/url/10035.
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When you deployed your updated categories.aspx page in the previous exercise, you did not need to reactivate the feature. The reason for this is that you are updating the source of the module created in the first exercise. SharePoint maintains the link to the source file in a module as long as we do not customize the page further using tools such as SharePoint Designer. As such, any edits made to the source file will immediately affect any page that has been provisioned from that source file. Here comes a cool thing about WSPBuilder: in your Solution Explorer, you copy a file directly to [12] using a context menu shortcut. Developing this is extremely handy because you do not need to rebuild the WSP file, deploy, wait for solution retraction, and deploy for every minor change you do to your page. All you do is right-click the file, hit Copy to 12 hive, and refresh the page. Figure 14-3 shows where this option is located.
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Figure 14-3. Copy to 12 hive option in WSPBuilder
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CHAPTER 14 PAGES AND PAGES OF FUN!
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OK, it is time to fix that horrible iteration code from the previous exercise.
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Exercise 14-3. Improving the Site Page Code
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In this exercise, you will improve the code from the previous exercise and utilize an SPQuery object to optimize the page. 1. Replace the code you added in step 5 of Exercise 14-2 with the following code: foreach (SPListItem categoryItem in categoryList.Items) { Panel p = new Panel(); p.CssClass = "empirenews-categorylist"; Label lb = new Label(); lb.CssClass = "empirenews-heading"; lb.Text = categoryItem.Title; p.Controls.Add(lb); SPQuery query = new SPQuery(); query.Query = @"<Where><Eq> <FieldRef Name=""ArticleCategory"" LookupId=""True"" /> <Value Type=""Lookup"">" + categoryItem.ID + "</Value></Eq></Where>"; foreach (SPListItem articleItem in web.Lists["News"].GetItems(query)) { LinkButton linkbutton = new LinkButton(); linkbutton.CssClass = "empirenews-articleitem"; linkbutton.Text = articleItem.Title; p.Controls.Add(linkbutton); } cp.Controls.Add(p); } The major changes here are that we now use an SPQuery object and design a CAML query to return only the relevant items from the news list. Since we get only the relevant items from the query, we have also simplified the foreach loop that iterates the news list.
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Note Look at the FieldRef element of our query, and note that we add the LookupId="True" attribute.
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This ensures that we query the Id part of the lookup value. If you do not care about the possibility of duplicate names in a lookup list, you can skip the LookupId attribute and just put the SPListItem.Title property in the Value element.
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That should be it. Running your code should yield exactly the same result as shown in Figure 14-2.
CHAPTER 14 PAGES AND PAGES OF FUN!
By using the SPQuery object, we get a lot more control over what is displayed. For example, you might want to add RowLimit to your SPQuery object to just get the first five items within each category: query.RowLimit = 5; Or, knowing that the default sort is by ID, you might want to sort the items in a different order. You could sort the news by the modified date to bring the latest news first by adding a few elements to the query: <OrderBy> <FieldRef Ascending="False" Name="Modified" /> </OrderBy> Look, this exercise is about creating pages, so I don t want to get too deep into the list querying stuff. In any case, doing this using a custom view is likely to be much more efficient and will also add the benefit of being able to modify the view using the web interface rather than updating compiled code. As such, let s move on.
Adding a Global Page and a Code-Behind
Sometimes you want to improve or expand the management experience, and this is a situation where placing files in the [12]\TEMPLATE\LAYOUTS folder would be a wise choice. As mentioned before, files placed in this folder are available to all sites in all site collections. For this example, I have chosen to do a simple content type hierarchy page. For the sake of brevity, the example will be extremely simple and just add the content types to a TreeView control. I will leave any expansion beyond that, such as adding fancy icons for sealed or readonly content types or linking to other custom or out-of-the-box management pages, for your exploration. For this exercise I want you to create a new solution. This solution will be globally available and not dependant on the EmpireTimes solution.
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