Windows phone 7 Windows Phone上的自定义实时磁贴渲染问题（7/8）

Windows phone 7 Windows Phone上的自定义实时磁贴渲染问题（7/8）,windows-phone-7,windows-phone-7.1,windows-phone-8,live-tile,Windows Phone 7,Windows Phone 7.1,Windows Phone 8,Live Tile,在我的Windows Phone应用程序的主页中，用户可以单击按钮执行一些操作，这将触发live互动程序进行更新 我遇到的问题是，如果用户点击按钮，然后很快点击手机的后退按钮，实时互动程序有时无法正确渲染。这个问题很少发生，但它确实发生了，当它发生的时候，看起来很糟糕 我实现活动磁贴的方法是，创建一个看起来与活动磁贴完全相同的用户控件，然后将其保存到独立存储中。然后检索它并将其存储在FliptileData对象中。最后，我在ShellTile上调用Update方法。请参阅下面的代码来演示该过程

    // the function that saves the user control to isolated storage
    public Uri SaveJpegToIsolatedStorage(FrameworkElement tile, string suffix, int tileWidth = 336, int tileHeight = 336)
    {
        var bmp = new WriteableBitmap(tileWidth, tileHeight);

        // Force the content to layout itself properly
        tile.Measure(new Size(tileWidth, tileHeight));
        tile.Arrange(new Rect(0, 0, tileWidth, tileHeight));

        bmp.Render(tile, null);
        bmp.Invalidate();

        // Obtain the virtual store for the application
        IsolatedStorageFile myStore = IsolatedStorageFile.GetUserStoreForApplication();
        using (IsolatedStorageFileStream fileStream = new IsolatedStorageFileStream(IsolatedStorageFileName + suffix, FileMode.Create, myStore))
        {
            try
            {
                bmp.SaveJpeg(fileStream, tileWidth, tileHeight, 0, 100);
            }
            catch (Exception)
            {
                return null;
            }
        }

        return new Uri("isostore:/" + IsolatedStorageFileName + suffix, UriKind.Absolute);
    }

    // save the user control to isolated storage and prepare the FlipTileData object
    wideFrontTileImage = SaveJpegToIsolatedStorage((UserControl)this.WideFrontTile, "_wide_front", 691);
    var flipTileData = new FlipTileData();
    flipTileData.WideBackgroundImage = wideFrontTileImage;
    return flipTileData;

    // update the live tile
   var shellTile = ShellTile.ActiveTiles.FirstOrDefault();
   shellTile.Update(customTile.GetFlipTileData(data.UndoneMemosCount == "0" && data.TotalMemosCount == "0"));