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POGenerating a secondary tile with image not showing image immediately
 

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  1. POGenerating a secondary tile with image not showing image immediately
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    <p>When adding a newly generated image to a secondary tile, it doesn't find it initially - why and how do I fix it?</p> <h3>The full story</h3> <p>Hello, I'm working on a Windows Phone application that creates secondary live tiles on the phone's home screen.</p> <p>Since there is currently no easy way to generate a secondary live tile with given XAML I do the following:</p> <ul> <li>Create a <code>UserControl</code> with given XAML and data bind it to my data</li> <li>Use <code>WriteableBitmap</code> to write it after data binding to an image.</li> <li>Use PNGWriter to write it to isolated storage</li> <li>Create the live tile with the generated <code>isostore:/</code> url.</li> </ul> <p>This <em>kinda</em> works, the problem is when the tile is created it's not showing, only after time passes the tile suddenly appears correctly.</p> <p>I use the following code for generation:</p> <pre><code>public static void GenerateMediumTile(DashboardViewModel source) { var image = new LiveTileMedium() {DataContext = source}; image.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); image.Arrange(new Rect(0,0,336,336)); var bitmap = new WriteableBitmap(336,336); bitmap.Render(image,new TranslateTransform()); bitmap.Invalidate(); using (var fileStore = IsolatedStorageFile.GetUserStoreForApplication()) { var file = fileStore.OpenFile("Shared/ShellContent/tile_" + source.Ticker + "_medium.png", FileMode.Create); bitmap.WritePNG(file.AsOutputStream().AsStreamForWrite()); } } </code></pre> <p>Then this code for creating the tile:</p> <pre><code>var largeImageFile = isostoreSharedShellcontentTile + tileImage.Ticker + "_big.png"; var oFliptile = new FlipTileData { Title = "", BackTitle = "", BackContent = "", SmallBackgroundImage = new Uri("/Assets/Matrial/small_tile159x159.png", UriKind.RelativeOrAbsolute), BackgroundImage = new Uri(mediumImageFile, UriKind.Absolute), ... ShellTile.Create(new Uri(url, UriKind.Relative), oFliptile, true); </code></pre> <p>Here is what the tile looks like when I'm creating it, and then after time passes and I enter another app.</p> <p><img src="https://i.stack.imgur.com/d9lrPm.jpg" alt="enter image description here"> <img src="https://i.stack.imgur.com/AAeHRm.jpg" alt="enter image description here"></p>
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    1. USBenjamin Gruenbaum
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