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<my:DataGrid x:Name="BookDataGrid" Height="200" Width="600" SelectionChanged="BookDataGrid_SelectionChanged" /> <my:DataGrid x:Name="BookDetailsDataGrid" Height="100" Width="600" /> And the highlighted updated LINQ query code in the btnGetData_Click method is shown here: //LINQ to Entity with Eager loading using Expand var q = (from c in context.Books.Expand("BookDetails") select c); The code for BookDataGrid _SelectionChanged method is as follows: private void BookDataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e) { //Getting reference to current selected book Book currentBook = BookDataGrid.SelectedItem as Book; //LINQ to get details for the selected book var q = from bd in context.Books where bd.ID == currentBook.ID select bd; var dsq = (DataServiceQuery<Book>)q; //Async execution of the query dsq.BeginExecute(result => { BookDetailsDataGrid.ItemsSource = dsq.EndExecute(result).FirstOrDefault(). BookDetail.ToList(); }, null); } As Silverlight follows asynchronous models for such operations, we need to cast LINQ query q to DataServiceQuery and start an asynchronous execution of the query using the BeginExecute/EndExecute method pair as shown in the previous code snippet. Finally we bind the result of the asynchronous query to BookDetailsDataGrid. At this point you can run the project, press the Get data button, and click any of the books in BookDataGrid, and the result will be similar to the one shown in Figure 6-28.

case GameState.SignIn: { if (Gamer.SignedInGamers.Count < 1) { Guide.ShowSignIn(1, false); log.Add("Opened User SignIn Interface"); } else { currentGameState = GameState.SearchSession; log.Add(Gamer.SignedInGamers[0].Gamertag + " logged in - proceed to SearchSession"); } } break; case GameState.SearchSession: { AvailableNetworkSessionCollection activeSessions = NetworkSession.Find(NetworkSessionType.SystemLink, 4, null); if (activeSessions.Count == 0) { currentGameState = GameState.CreateSession; log.Add("No active sessions found - proceed to CreateSession"); } else { AvailableNetworkSession networkToJoin = activeSessions[0]; networkSession = NetworkSession.Join(networkToJoin); string myString = "Joined session hosted by " + networkToJoin.HostGamertag; myString += " with " + networkToJoin.CurrentGamerCount.ToString() + " players"; myString += " and " + networkToJoin.OpenPublicGamerSlots.ToString() + " open player slots."; log.Add(myString); HookSessionEvents(); currentGameState = GameState.InSession; } } break; case GameState.CreateSession: { networkSession =

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While IsSelfValid indicates the validity of a specific object, the true validity of an object must also include the validity of any child objects. Even if an object itself is valid, if it contains invalid child objects, the object graph as a whole must be considered invalid. The IsValid property combines the IsSelfValid result with the IsValid results of any child objects contained by this object:

Supports increment and decrement Supports increment, decrement, and indexing (operator []) Used when you are not modifying the elements Traverses the container in the normal forward direction Traverses the container in the opposite direction as a forward iterator

J2EE connection pool), and you have sized your connection pool appropriately, using shared server will only be a performance inhibitor. You already sized your connection pool to cater for the number of concurrent connections that you will get at any point in time; you want each of those connections to be a direct dedicated server connection. Otherwise, you just have a connection pooling feature connecting to yet another connection pooling feature.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options ops$tkyte%ORA11GR2> select a.spid dedicated_server, 2 b.process clientpid 3 from v$process a, v$session b 4 where a.addr = b.paddr 5 and b.sid = (select sid from v$mystat where rownum=1) 6 / DEDICATED_SERVER CLIENTPID ------------------------ -----------------------19168 19167 ops$tkyte%ORA11GR2> ops$tkyte%ORA11GR2> !/bin/ps -fp 19168 UID PID PPID C STIME TTY tkyte 19167 19166 0 07:30 pts/2 ora11gr2 19168 19167 0 07:30 19167 STAT Ss+ Ss

Figure 32-22. Opening the smart tab menu Click the Dock in Parent Container link at the bottom of the menu. This will expand the control so that it fills the window. We also want to change the way that the columns are displayed so that they are resized to fill the display. Do this by changing the value of the AutoSizeColumnsMode to Fill in the Properties window. Don t worry that the display shows all of the columns packed in tightly. Our next step is to remove the columns we don t want. Click the smart tab arrow again, and select Edit Columns. This will open the Edit Columns dialog box. Use the Remove button to remove columns from the list, and use the up and down arrow buttons to change the order until you have the same columns in the same orders as in Figure 32-23.

overheads introduced by encryption if the PGA is not large enough to hold intermediate result sets.

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