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POA WPF transparent window doesn't dispose when closed
 

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  1. POA WPF transparent window doesn't dispose when closed
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    <p>I'm seeing a huge memory leak in a program I'm building using WPF. I've written a small example app which seems to replicate this issue on a smaller scale.</p> <pre><code>public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); images = Directory.GetFiles("C:\\Photos", "*.jpg", SearchOption.TopDirectoryOnly); foreach (string image in images) { Window1 window = new Window1(image); window.Show(); window.Close(); } } } </code></pre> <p>The Window1 XAML . . .</p> <pre><code>&lt;Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" AllowsTransparency="True" WindowStyle="None" Background="White" Opacity="1.0" &lt;Grid&gt; &lt;Image Name="pb_Image"/&gt; &lt;/Grid&gt; </code></pre> <p></p> <p>. . . and the Window1 code</p> <pre><code>public Window1(string image) { InitializeComponent(); BitmapImage bi = new BitmapImage(new Uri(image, UriKind.Absolute)); bi.Freeze(); pb_Image.Source = bi; pb_Image.Height = bi.Height; pb_Image.Width = bi.Width; } </code></pre> <p>It repeatedly shows and then closes a window which contains a <code>BitmapImage</code> however an "out of memory exception" occurs very quickly so I'm obviously doing something wrong and hoping someone can point it out!</p> <p><strong>* Update *</strong></p> <p>After playing around for a while I've isolated the issue, this causes a memory leak:</p> <pre><code>foreach (string image in images) { Window1 window = new Window1(image); window.Show(); window.Close(); } </code></pre> <p>and this doesn't</p> <pre><code>foreach (string image in images) { Window1 window = new Window1("C:\\Photos\\photo1.jpg"); window.Show(); window.Close(); } </code></pre> <p>Puzzling - any ideas???</p>
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    1. USGavimoss
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    1. COTaskmgr is a *very* imperfect memory profiler, both the garbage collector and the Windows memory manager are far too sophisticated to be second-guessed by a single number. Prove that you have a real problem by running this code a million times.
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      1. POA WPF transparent window doesn't dispose when closed
      1. USHans Passant
    2. COI've update my code to hopefully more accurately show what is happening. I suspect that my original scaled down code was not accurately reproducing the issue I am experiencing.
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      1. USGavimoss
    3. COcheck this one: http://stackoverflow.com/questions/568408/what-is-the-correct-way-to-dispose-of-a-wpf-window
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      1. POA WPF transparent window doesn't dispose when closed
      1. USDavide Piras
 

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