c# print barcode In the next section, you ll see how to find sessions asynchronously. in Font

Create DataMatrix in Font In the next section, you ll see how to find sessions asynchronously.

In the next section, you ll see how to find sessions asynchronously.
Data Matrix ECC200 Creator In None
Using Barcode generator for Font Control to generate, create ECC200 image in Font applications.
www.OnBarcode.com
Print Barcode In None
Using Barcode maker for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Finding and Joining a Session Asynchronously
Code 3 Of 9 Printer In None
Using Barcode creation for Font Control to generate, create Code 3/9 image in Font applications.
www.OnBarcode.com
Print PDF-417 2d Barcode In None
Using Barcode generator for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Coding for asynchronous session searching is an approach commonly used in games because you usually don t want to freeze the game and the player options when searching for available sessions. The basic idea for session finding and joining is the same as you saw in the previous section. However, here you ll use the BeginFind and EndFind NetworkSession methods, which respectively start a session search, indicating the function to be called when the searching is ended, and get the results from the search. The next code sample, to be included in your NetworkHelper class, defines a new variable used to store and track the status of the asynchronous operation, and a method that will call BeginFind to start the session searching:
UCC-128 Maker In None
Using Barcode maker for Font Control to generate, create GTIN - 128 image in Font applications.
www.OnBarcode.com
Printing QR In None
Using Barcode maker for Font Control to generate, create QR Code JIS X 0510 image in Font applications.
www.OnBarcode.com
IAsyncResult AsyncSessionFind = null; public void AsyncFindSession() { message = "Asynchronous search started!"; if (AsyncSessionFind == null) { AsyncSessionFind = NetworkSession.BeginFind( NetworkSessionType.SystemLink, maximumLocalPlayers, null, new AsyncCallback(session_SessionFound), null); } } BeginFind receives the same parameters from the Find method discussed in the previous section (session type, maximum number of players, and custom session properties), plus the address of the callback function (which is called when the search results are ready). BeginFind also receives an object used to store the state of the asynchronous operation (let s not bother about this last one right now; it s fine just to pass a null value). In the previous code sample, you passed session_SessionFound as the callback function for BeginFind. The next code excerpt presents the code for the callback function that, as you ll see, is very similar to your previously coded FindSession method:
Generate Barcode In None
Using Barcode maker for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Make OneCode In None
Using Barcode generator for Font Control to generate, create Intelligent Mail image in Font applications.
www.OnBarcode.com
CHAPTER 5 s BASICS OF GAME NETWORKING
Data Matrix ECC200 Printer In Java
Using Barcode generator for Java Control to generate, create Data Matrix image in Java applications.
www.OnBarcode.com
Scanning Data Matrix ECC200 In Visual C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
public void session_SessionFound(IAsyncResult result) { // all sessions found AvailableNetworkSessionCollection availableSessions; // the session we will join AvailableNetworkSession availableSession = null; if (AsyncSessionFind.IsCompleted) { availableSessions = NetworkSession.EndFind(result); // Look for a session with available gamer slots foreach (AvailableNetworkSession curSession in availableSessions) { int TotalSessionSlots = curSession.OpenPublicGamerSlots + curSession.OpenPrivateGamerSlots; if (TotalSessionSlots > curSession.CurrentGamerCount) availableSession = curSession; } // if a session was found, connect to it if (availableSession != null) { message = "Found an available session at host" + availableSession.HostGamertag; session = NetworkSession.Join(availableSession); } else message = "No sessions found!"; // Reset the session finding result AsyncSessionFind = null; } }
Create Barcode In None
Using Barcode creation for Microsoft Word Control to generate, create Barcode image in Office Word applications.
www.OnBarcode.com
2D Generation In Visual Studio .NET
Using Barcode encoder for .NET framework Control to generate, create Matrix Barcode image in .NET framework applications.
www.OnBarcode.com
The previous code excerpt is almost identical to your FindSession synchronous method; in fact, only three lines are different: the test to check the AsyncSessionFind. IsCompleted property to see if the results are already available; using NetworkSession. EndFind (instead of NetworkSession.Find) to retrieve the available sessions collection; and finally the last line of the listing, where you simply reset the AsyncSessionFind result variable. So, if you understand the synchronous session searching concepts, you have few new things to learn when dealing with asynchronous ones.
USS Code 128 Generation In Visual Basic .NET
Using Barcode maker for Visual Studio .NET Control to generate, create Code 128 Code Set C image in VS .NET applications.
www.OnBarcode.com
Making GS1 - 12 In Java
Using Barcode generator for Eclipse BIRT Control to generate, create GS1 - 12 image in Eclipse BIRT applications.
www.OnBarcode.com
CHAPTER 5 s BASICS OF GAME NETWORKING
Draw European Article Number 13 In Java
Using Barcode printer for Android Control to generate, create EAN-13 Supplement 5 image in Android applications.
www.OnBarcode.com
EAN13 Encoder In .NET Framework
Using Barcode maker for Reporting Service Control to generate, create EAN13 image in Reporting Service applications.
www.OnBarcode.com
All you need to do now is to revise the Update method of the Game1 class to call the new asynchronous session-finding method, by including the following lines:
Encoding USS-128 In Objective-C
Using Barcode printer for iPhone Control to generate, create USS-128 image in iPhone applications.
www.OnBarcode.com
Barcode Recognizer In Visual C#.NET
Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in .NET framework applications.
www.OnBarcode.com
// Find a session asynchronously if (Keyboard.GetState().IsKeyDown(Keys.F4)) networkHelper.AsyncFindSession();
UPC Code Reader In C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Read ANSI/AIM Code 39 In C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
You can test the new code by executing again the steps you used in the previous section to join a session synchronously, except that you press the F4 key instead of the F3 one. On the client machine you ll see the message Asynchronous search started! followed, a few seconds later, by the message that states the result of the session searching. Now that you have two machines with signed-in gamers, the first one creating a session and acting as a host, and the second one joining the session created, it s time to inform XNA that you are ready to go, and start the game!
Starting the Game
A game session, in XNA, has three possible states, informed by its SessionState property: NetworkSessionState.Lobby: A session in this state means that the local machine has joined a session and is ready to start, but is waiting for other players to join and the host to start the game. The host knows when all players are ready by checking the IsEveryoneReady property of the session object; it can check the number of signedin gamers by consulting Gamer.SignedInGamers.Count. NetworkSessionState.Playing: When the host starts the game, by calling the StartGame method of the session object, the GameStarted session event is fired for all players, and the session state changes from Lobby to Playing. NetworkSessionState.Ended: Similarly, the host calls the EndGame method of the session object to finish a game, firing the GameEnded session event for all players and changing the session state from Playing to Ended. So, once you have all players connected in the same session, you need every player to report that he or she is ready and to include the code in the host to start and end the game. Signaling that all local players (maximum one in Windows, up to four in Xbox 360) are ready is easy through the session object, which has a collection with references to all local gamers profiles. The next code sample shows a new method for your NetworkHelper class that does this job:
Copyright © OnBarcode.com . All rights reserved.