free barcode generator in asp net c# 6: Style Sheets, Master Pages, and Navigation in .NET

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6: Style Sheets, Master Pages, and Navigation
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First you will create the web site with the master page, minus the navigation controls, and all the content pages. Then you will add the site map and the navigation controls. Create a new web site called WebSiteNavigation. Delete Default.aspx by clicking on it in the Solution Explorer and pressing the Delete key. Confirm the deletion by clicking OK. Add a master page, exactly as you did previously in this chapter. Click on Website Add New Item . In the Add New Item dialog box, select Master Page. You can retain the default file name of MasterPage.master. Be sure to select the Place code in separate file checkbox (see Figure 6-6). When the master page opens in Source view, the only markup inside the <div> elements is the default ContentPlaceHolder control. Replace that with the highlighted code shown in Example 6-13. This is nearly identical to the CorpMasterPage.master from the example shown earlier in the chapter, except the ContentPlaceHolder control is placed inside an HTML table for layout control. Notice that the first cell in the only row in that table is empty at the moment. You will put the menu in that cell shortly.
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<%@ Master Language="VB" CodeFile="MasterPage.master.vb" Inherits="MasterPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <h1>AdventureWorks Corp.</h1> <br /> <hr /> <table width="100%"> <tr> <td> </td> <td> <asp:contentplaceholder id="cphCorpMaster" runat="server"> </asp:contentplaceholder> </td> </tr> </table> <br /> <hr /> <table> <tr> <td width="50%" align="left">Learning ASP.NET</td> <td width="50%" align="right">©Copyright 2007</td> </tr> </table> </div> </form> </body> </html>
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As you can see from the menu in Figure 6-18, there are six pages in this web site. Add all six of those pages to the web site now. In all cases, be sure to check the Select master page checkbox (see Figure 6-8), and to select MasterPage.master as the master page (the only choice). The names of the pages to create are: Home.aspx HR.aspx Production.aspx Sales.aspx Sales_Orders.aspx Sales_Stores.aspx
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6: Style Sheets, Master Pages, and Navigation
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To keep things simple, add only an <h1> heading to the Content area of each page identifying the name of the page. You are now ready to prepare the site map and add the navigation controls.
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Site Maps
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Site maps are used as a data source for navigation controls such TreeViews, Menus, and SiteMapPaths (which provide bread crumbs). Used in conjunction with master pages, these allow for easy and universal navigation without having to place navigation controls on every page of the web site. Add a site map to the current web site by clicking on Website Add New Item . When the Add New Item dialog appears, select Site Map and accept the default name, Web.sitemap, as shown in Figure 6-19.
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When you click Add, the file Web.sitemap is added to your web site, and the skeleton of a site map is provided for you, as shown in Example 6-14.
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< xml version="1.0" encoding="utf-8" > <siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" > <siteMapNode url="" title="" description=""> <siteMapNode url="" title="" description="" /> <siteMapNode url="" title="" description="" /> </siteMapNode> </siteMap>
The url attribute specifies the page this menu item will link to. The title attribute defines the text that is displayed as the link, and the description attribute is used in the tool tip.
Neither VWD nor VS2005 provide drag-and-drop support for creating your site map file. You can implement your own SiteMap provider to automate this process or get the site map from another source (such as a database) but this is a very advanced topic, beyond the scope of this book.
Replace the contents of Web.sitemap with the site map XML shown in Example 6-15.
< xml version="1.0" encoding="utf-8" > <siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" > <siteMapNode url="~/Home.aspx" title="Home" description="Home page"> <siteMapNode url="~/Sales.aspx" title="Sales" description="Sales" > <siteMapNode url="~/Sales_Orders.aspx" title="Orders" description="Orders" /> <siteMapNode url="~/Sales_Stores.aspx" title="Stores" description="Stores" /> </siteMapNode> <siteMapNode url="~/Production.aspx" title="Production" description="Production" /> <siteMapNode url="~/HR.aspx" title="Human Resources" description="HR" /> </siteMapNode> </siteMap>
The site map is an XML file, as indicated by the first line in the file. The entire hierarchy of the file is contained within a single <sitemap> element that defines the namespace:
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