c# create 2d barcode Note The string MasterPageFile="~masterurl/default.master" is not a URL. The in Font

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Note The string MasterPageFile="~masterurl/default.master" is not a URL. The
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~masterurl/default.master part is a token that SharePoint translates to the current master page
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URL of our site. If we change the master page for the site, all pages will get the new master page. Very convenient. You can read more about master page tokens on MSDN at http://www.understandingsharepoint. com/url/10033.
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6. Add a random control to the asp:Content control. If you are in a particularly noncreative mood this day, here is a suggestion: <asp:Label Text="Custom content" runat="server" /> The control doesn t really matter at this point; we just want to set up the framework. 7. Build, deploy, and then activate your new feature on the site you use for the Empire Times example. Go to the page siteurl/categories.aspx. For my example, that would be http://lab-s02:10000/ categories.aspx. Check out Figure 14-1 for how this looks on my server.
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Figure 14-1. Custom site page That s it. It s nothing too fancy for the moment. We will return to the more elaborate examples in a moment.
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The custom page you just created can serve as a template for creating other site pages. From this point on, we will add page-specific content, so I thought it would be wise to just pause here for a moment so you can admire your creation. Note that most of the content in our page is still housed in the default master page. To maintain a consistent user experience, this makes sense. I am not saying you should keep the standard SharePoint master page; after all, we are here to learn how to customize the user
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CHAPTER 14 PAGES AND PAGES OF FUN!
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experience, not re-create the existing experience. However, if you stick to using the ~masterurl/ default.master token, then updating the user experience for all pages is a lot easier. Also note that we are inheriting the Microsoft.SharePoint.WebPartPages.WebPartPage class. In a later exercise, we will create our own class to serve as the code-behind class, but for now we will make do with the basic functionality that WebPartPage provides. I think we should move on and start adding some interesting stuff to our page.
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Exercise 14-2. Adding Some Content to the Page, Take 1
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In this exercise, you will add content directly to the asp:content control. You will manipulate the page using inline code to archive an article listing grouped by categories. 1. (Optional) Start from the page you created in Exercise 14-1, and add the following line to the top of the categories.aspx page: <%@ Register TagPrefix="SharePoint" Namespace="Microsoft.SharePoint" Assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> Adding those lines makes code writing a lot easier because you do not have to prefix all your SPXXXX objects with Microsoft.SharePoint. 2. Add a script tag below the ASP:Content control you added earlier: <asp:Content ID="Content1" runat="server" ContentPlaceHolderID="PlaceHolderMain"> </asp:Content> <script runat="server"> </script> 3. Inside the script tag, override the OnLoad method, and remove the base.OnLoad method call: <script runat="server"> protected override void OnLoad(EventArgs e) { } </script>
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Note The rest of our code will happen inside the OnLoad method, so I will refrain from mentioning that
fact every time.
4. Add some objects, and get some proper web and list references to the OnLoad method: EnsureChildControls(); SPWeb web = SPContext.Current.Site.RootWeb; SPList categoryList = web.Lists["Categories"];
CHAPTER 14 PAGES AND PAGES OF FUN!
ContentPlaceHolder cp = (ContentPlaceHolder)Master.FindControl("PlaceHolderMain"); cp.Controls.Clear(); Table table = new Table(); // Whoops, better not, or we'll have the entire // HTML TABLES ARE BAD crowd on our tails. Yeah, we ll stay away from the table-based layout, just to please the CSS geeks out there. Skip the last three lines if you like. Next we want to iterate over the category items and place the correct items in a list beneath the category name. 5. Add the following code after the object initialization in step 4: 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); foreach (SPListItem articleItem in web.Lists["News"].Items) { SPFieldLookupValue articleCategory = new SPFieldLookupValue(articleItem["ArticleCategory"].ToString()); if (articleCategory.LookupValue == categoryItem.Title.ToString()) { LinkButton linkbutton = new LinkButton(); linkbutton.CssClass = "empirenews-articleitem"; linkbutton.Text = articleItem.Title; p.Controls.Add(linkbutton); } } cp.Controls.Add(p); } As stated, this code iterates the category items, adds a nice <div> tag for each category, and then iterates all the items in the news list to check whether the item belongs to the category.
Note If your current thought at this point includes the acronym WTF, you are not alone. Iterating every
single item in the news list for every single category is a highly unoptimized way of generating a list. We will improve this later.
CHAPTER 14 PAGES AND PAGES OF FUN!
6. (Optional) Since we added the .CssClass property to our controls, we might as well add the CSS code to our page. Add the following code outside the script tag and existing asp:Content controls: <asp:Content runat="server" ContentPlaceHolderID="PlaceHolderAdditionalPageHead"> <style type="text/css"> .empirenews-heading { font-size: medium; font-weight: bold; display: block; } .empirenews-articleitem { display: block; } </style> </asp:Content> Yeah, I know, that is CSS. There won t be much more, I promise. This is just done to pretty things up a bit. 7. Build and then deploy or update. You changes should be immediate; there s no need to reactivate the feature. Your result should resemble Figure 14-2.
Figure 14-2. Custom site page deployed It s cool but not very efficient. We should work to improve our example a bit.
CHAPTER 14 PAGES AND PAGES OF FUN!
Note We are adding inline code to our site page, which must present a security problem. After all, if you can just upload an .aspx page and have code run inside, anyone could upload code to a page library and run the page. The answer to this mystery is that we are not running our page from a library at all. If you try the same trick with a page stored in a library or even if you customize the page we have created here using SharePoint Designer, you get an error message stating that you are not allowed to run inline code in this page.
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