How to use the game invite task for Windows Phone 8

July 21, 2014

Applies to: Windows Phone 8 and Windows Phone Silverlight 8.1 | Windows Phone OS 7.1

Use the game invite task to show a game invite screen that enables the user to invite players to a multiplayer game session. The invitation is sent asynchronously.

By using Choosers, you help provide a consistent user experience throughout the Windows Phone platform. For more information, see Launchers and Choosers for Windows Phone 8.

Caution noteCaution:

The game invite task works only when called from within a game that is approved for release on Xbox LIVE on Windows Phone. For more information, see Developing Games for Windows Phone 7.

To use the game invite task

  1. Add the following statement to your code.

    using Microsoft.Phone.Tasks;
    
  2. Declare the task object. It must have page scope, so declare it in your page before the constructor.

    GameInviteTask gameInviteTask;
    
  3. Add the following code to your page constructor. This code initializes the task object, and identifies the method to run after the user completes the task.

    gameInviteTask = new GameInviteTask();
    gameInviteTask.Completed += new EventHandler<TaskEventArgs>(gameInviteTask_Completed);
    
  4. Add the following code to your application wherever you need it, such as in a button click event. To test this procedure, you can put the code in the page constructor. This is the code to launch the task.

    
    
    
    gameInviteTask.SessionId = "<my session id>";
    gameInviteTask.Show();
    
    
    
    
    
    
    
  5. Add the code for the completed event handler to your page. This code runs after the user completes the task. You can check to see whether the invite was sent successfully.

    void gameInviteTask_Completed(object sender, TaskEventArgs e)
    {
        switch(e.TaskResult)
        {
            //Game logic for when the invite was sent successfully
            case TaskResult.OK:
                MessageBox.Show("Game invitation sent.");
                break;
    
            //Game logic for when the invite is cancelled by the user
            case TaskResult.Cancel:
                MessageBox.Show("Game invitation cancelled.");
                break;
    
            // Game logic for when the invite could not be sent
            case TaskResult.None:
                MessageBox.Show("Game invitation could not be sent.");
                break;
        }
    }
    

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