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As mentioned before, location devices are sensors; therefore, it all starts with a sensor device in our case, a GPS sensor A GPS sensor is a physical hardware device that is connected to the computer, as shown by number 1 in Figure 10-1 To properly work with the Windows 7 Sensor and Location Platform, any sensor device (physical or logical) requires a Windows 7 Sensor and Location driver We explained the role of the User Mode Driver and Sensor Class Extensions in the previous chapter In the previous chapter, we also mentioned that sensors can be logical (virtual) sensors, and that is the case with most other location sensors that are not GPS based IP Resolver, Wi-Fi, and broadband triangulation are all logical location sensors that are connected to the computer, as shown by number 2.

Both of these code samples contain SQL injection vulnerabilities. However, the second code sample is easier to fix, because code that is accessing the database is located in a separate method. Ideally, database access methods are centralized in a single class in your application. To make your code easier to maintain and fix, never open a database connection directly from methods that perform non-database functions.

In this exercise, you will create the hosting application that will run using WAS. The hosting application will consist of a virtual directory that also supports the net.tcp protocol. 1. Navigate to the <InstallHome>/ 3/Lesson 1/Exercise 2/<language>/Before directory and copy the bin folder and all the contents to a new folder named TaskManagerHost on your local hard drive. For example, you can copy the files to a new sub folder within your \Inetpub\wwwroot folder. The bin folder should now be a subfolder beneath the TaskManagerHost folder. The bin subfolder contains a compiled version of the TaskManager service introduced in the lab exercises for 1. 2. Right-click within the TaskManagerHost folder, click New, and then click Text Document. Name the text file Service.svc and make sure the file extension is not still .txt. Click OK when warned about changing the file name extension. 3. Open the Service.svc file with any text editor and type the following code; then save and close the file:

Maintaining Disks with Disk Defragmenter, Check Disk, and Disk Cleanup 10-63

Clicking Stop Mirroring in the GUI is equivalent to issuing the ALTER DATABASE AdventureWorks SET PARTNER OFF Transact-SQL command from either the principal or the mirror database.

After a sensor (physical or logical) is installed and integrated, this sensor becomes discoverable to an application via the Sensor API, shown as number 3 Any application can directly access sensors using the Sensor API, as depicted by number 7 and as explained in the previous chapter The Sensor and Location Platform, through the Location API, exposes three sets of programming models to retrieve location information A C++ COM-based API that exposes a set of interfaces and objects that you can work with to get location data reports and notification about changes in the location, as shown as number 4 There is an equivalent managed code API for NET developers, shown as number 5, which we describe later in the book in the Application Using NET section Any application can access the Location API, shown as number 8.

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Note that, as with the Sensor API, the Location API supports concurrent access, thereby enabling multiple applications to retrieve location information using the Location API at the same time The third programming model that exposes location information is the scripting model; it does this by using the Location IDispatch Interface, shown as number 6 This is an ActiveX object that enables scripting languages, such as Java Script, access to the location information These objects provide similar functionality as the C++ API, and they enable you to create Windows gadgets and Web pages that are location aware For example, Figure 10-2 shows two gadgets: on the left, a location-aware weather gadget that ships with Windows 7; on the right, a locations gadget that displays different types of venues within a certain radius from the user s current location like coffee shops, restaurant, movie theaters, or in our example, public parks..

To prevent CSS attacks, rigorously validate any user input that will be displayed to other users. In particular, be wary of HTML and client-side scripts contained in < > brackets. If you do not plan to allow users to create HTML, you can use the following code to sanitize input:

TotalCostParameter.ParameterName = "@TotalCost"

Enabled UAC detects application installation packages that require an elevation of priv-