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Basic AdRotator
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The following steps take you through the process of creating a page with an AdRotator Web Server control:
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1 Open a new Web Site, and save it as BasicAdRotator 2 Once you have opened the Web Site, select New | File, and when the Templates
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window appears, click on the XML file icon In the Name window, type AdCampaignxml as shown in Figure 10-4
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3 Create a folder on your web site named ads Generate two different graphics ads, and
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save them as ad1jpg and ad2jpg Figures 10-8 and 10-9 (later in this chapter) show a couple of examples (Note: The message at the bottom of Figures 10-8 and 10-9 is generated by the AdRotator and a C# script, and should not be in the graphic image)
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4 When the XML window opens, enter the following code and save the file in the
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current web site s App_Data folder:
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<Advertisements> <Ad> <ImageUrl>ads/ad1jpg</ImageUrl>
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10:
Rich Data Controls
Figure 10-4 Adding XML file to web site
<NavigateUrl>http://wwwsandlightnet</NavigateUrl> <AlternateText>All backends in ASPNET 35!</AlternateText> <Impressions>2</Impressions> <Keyword>Interactive Development</Keyword> </Ad> <Ad> <ImageUrl>ads/ad2jpg</ImageUrl> <NavigateUrl>http://wwwsandlightnet</NavigateUrl> <AlternateText>Powered by Ajax!</AlternateText> <Impressions>2</Impressions> <Keyword>Information Design</Keyword> </Ad> </Advertisements>
5 Once your XML file is complete and stored in the App_Data folder, select the tab
containing the ASPX template, and set the view to Split mode
( continued )
ASPNET 35: A Beginner s Guide
6 Drag an AdRotator control from the Toolbox Standard menu, and then drag a Label
control and place it directly under the AdRotator (Use a <br /> tag to separate them vertically)
7 In the Design portion of the Split mode, select the AdRotator icon, and open the pop-up
menu and select <New data source > from the menu The Data Source Configuration Wizard opens as shown in Figure 10-5 Click on the XML File icon and specify the ID as AdCampaign Click OK when finished
8 As soon as you click OK, the Configure Data Source window opens as shown in
Figure 10-6 Either type in the path, or click the Browse button to locate it for you You do not need to fill in either the Transform File or XPath Expression window Just leave them both blank and click OK
Figure 10-5 Selecting data source type
10:
Rich Data Controls
Figure 10-6 Specifying path to data source file
9 Double-click the AdRotator icon to generate the onadcreated attribute in the
AdRotator tag and the C# event handler Change the name of the event handler to Sandlight_AdCreated in both the ASPNET and C# portions of the application While you re at it, remove the Page_Load function from the C# portion of the application The following listings provide the code for both the ASPNET and C# portions of the application:
ASPNET AdRotateaspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AdRotateaspxcs" Inherits="RollAd" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 10 Transitional//EN" "http://wwww3org/TR/xhtml1/DTD/xhtml1-transitionaldtd"> <html xmlns="http://wwww3org/1999/xhtml"> <head runat="server"> <title>ADRotator At Work</title> </head>
(continued )
ASPNET 35: A Beginner s Guide
<body> <form id="form1" runat="server"> <div> <asp:AdRotator runat="server" DataSourceID="AdCampaign" onadcreated="Sandlight_AdCreated" /> <asp:XmlDataSource ID="AdCampaign" runat="server" DataFile="~/AdCampaignxml" /> <br /> <asp:Label ID="Label1" runat="server" BackColor="Yellow" Font-Bold="True" Font-Names="Comic Sans MS" ForeColor="#036525" /> </div> </form> </body> </html>
In the C# portion of the code, note that AdCreatedEventArgs is the second parameter in the event handler The event instance, e, can be assigned ImageUrl and NavigateUrl from the XML file in addition to the AlternateText content
C# AdRotateaspxcs
using System; using SystemWebUIWebControls; public partial class RollAd : SystemWebUIPage { protected void Sandlight_AdCreated(object sender, AdCreatedEventArgs e) { Label1Text=eAlternateTextToString(); } }
Once you have finished your application, check the directory where you have placed your web site files and folders If you encounter any trouble, the cause may be due to misplacement of the files Figure 10-7 shows a directory with the files and folders correctly placed
10:
Rich Data Controls
XML file is placed in the App_Data folder
Figure 10-7 Files and folders for AdRotator application
Importantly, your data source, the XML file, goes into the App_Data file as indicated in Figure 10-7 You can add as many advertisement graphic files as you want in the ads folder When more ads are placed in the ads folder, you will need to update your XML file for them to be shown Alternatively, you can simply change the ad content by using the same graphic file names with new content, replacing the old ones in the ads folder In that way, all you need to do is to replace the old set of graphic files with a new set and not change a thing in anything in the XML, ASPNET, or C# files Figures 10-8 and 10-9 show the two sample ads The order of the appearance of the ads does not depend on their placement in the XML file The <impressions> tag sets up the relative frequency of the ad In this example, both impression values are set to 2, so they should randomly appear the same number of times Had one been set to 100 and the other to 185, the one set to 185 would appear 185 times for every one time the other did
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