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Note As you ve already seen, you can construct the data source for a Web control in four ways. You can write code that populates a DataSet or returns a DataReader that you pass to the DataSource property of the Web control, or you can use a SqlDataSource (in either DataReader or the default DataSet mode) and set the DataSourceID property of the Web control. With ASP.NET 2.0, Microsoft has tied the SqlDataSource and GridView quite closely together, and by far the best option is to use them in conjunction. Therefore, all the examples here will use a SqlDataSource as the data source to the GridView.

And if you begin to type in an option to the subcommand and press Tab again, Bash will try to complete the option, like this: $ svn praise -<TAB>

A popular feature on current mobile devices is GPS capability, so the device can tell you where you are at any point in time. While the most common uses of GPS services are for mapping and getting directions, there are other things you can do if you know your location. For example, you might set up a dynamic chat application based on physical location, so you re chatting with those people who are nearest to you. Or you could automatically geo-tag posts to Twitter or similar services. GPS is not the only way a mobile device can identify your location. Alternatives include the following: The European equivalent to GPS, called Galileo, which is still under development at the time of this writing Cell tower triangulation, where your position is determined based on signal strength to nearby cell towers Proximity to public Wi-Fi hotspots that have known geographic locations Android devices may have one or more of these services available to them. You, as a developer, can ask the device for your location, plus details on which providers are available. There are even ways for you to simulate your location in the emulator, for use in testing your location-enabled applications.

In this example, you ll build a page that displays the list of Players and let the GridView take care of creating all the columns. This is the same page as you ve seen in s 3 and 4. In the following examples, you ll build on this page to see how you can modify the GridView to create much more useful pages. 1. In Visual Web Developer, add a new Web Form called GridView_Players.aspx. Make sure that the Place Code in Separate File check box is unchecked. 2. In the Source view, find the <title> tag within the HTML at the bottom of the page and change the page title to Players in a GridView. 3. Switch to the Design view and add a SqlDataSource to the page. Select Configure Data Source from the Tasks menu. 4. Select SqlConnectionString as the connection string to use on the first step of the wizard. Click the Next button. 5. Select the Player table. In the Columns list, select all five columns individually. Click the Next button. 6. If you want to test that the query returns the correct results, you can do so. When you re happy that the results are correct, click the Finish button. 7. Switch to the Source view. Within the body of the page, between the <form> and </form> tags, add a GridView to the page:

--config-dir --help --incremental $ svn praise -

<asp:GridView ID="GridView1" runat="server" DataSourceID="SqlDataSource1"> </asp:GridView> 8. Save the page, and then view it in a browser. When the page loads, you ll see that the list of Players is presented in a tabular format, as shown in Figure 7-9.

Android devices can have access to several different means of determining your location. Some will have better accuracy than others. Some may be free, while others may have a cost associated with them. Some may be able to tell you more than just your current position, such as your elevation over sea level or your current speed.