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POWPF Image UriSource and Data Binding using http:\\ URL
 

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    <p>I am having a problem displaying an image with a web URL in a WPF user control. I have worked through all the suggestions for a similar problem asked on this site in Aug 2008 (<a href="https://stackoverflow.com/questions/20586/wpf-image-urisource-and-data-binding">Image UriSource and Data Binding</a>) but none of those suggestions have worked.</p> <p>What I'd like to do is:</p> <pre><code>&lt;Image Width="50" Name="MemberImage"&gt; &lt;Image.Source&gt; &lt;BitmapImage DecodePixelWidth="50" UriSource="{Binding Member.ImageFilePathUri}" /&gt; &lt;/Image.Source&gt; &lt;/Image&gt; </code></pre> <p>ImageFilePathUri is a Uri created from the string path through:</p> <pre><code>public Uri ImageFilePathUri { get { return new Uri(this.ImageFilePath); } } } </code></pre> <p>This gives the "Property 'UriSource' or property 'StreamSource' must be set." error as expected.</p> <p>I have also tried using a value converter:</p> <pre><code>public class ImageConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { var image = new BitmapImage(); image.BeginInit(); if (value != null) { image.UriSource = new Uri((string)value); } image.DecodePixelWidth = 50; image.EndInit(); return image; } } </code></pre> <p>However, binding to it using:</p> <pre><code>&lt;Image Name="TestImage" Width="50" Source="{Binding Path=Member.ImageFilePath, Converter=Parliament.HansardApplicationSuite.Logging.Helpers.ImageConverter}"&gt;&lt;/Image&gt; </code></pre> <p>doesn't display the image.</p> <p>A further attempt to load the image programmatically, in the control constructor and/or the control Loaded event have also not worked:</p> <pre><code>if (this.MemberRollItemViewModel.Member != null) { var image = new BitmapImage(); image.BeginInit(); image.UriSource = new Uri(this.MemberRollItemViewModel.Member.ImageFilePath); image.DecodePixelWidth = 50; image.EndInit(); this.MemberImage.Source = image; } </code></pre> <p>The one thing that has worked is saving the image to a local file path and displaying that:</p> <pre><code>&lt;Image Width="50" Name="MemberImage"&gt; &lt;Image.Source&gt; &lt;BitmapImage DecodePixelWidth="50" UriSource="C:\Data\6bc64e7b-2df5-40d5-b6c4-eaf732318222.jpg" /&gt; &lt;/Image.Source&gt; &lt;/Image&gt; </code></pre> <p>This is obviously only useful in debugging the problem and is not a solution. The same code but substituting the http address for the local file path doesn't work.</p> <pre><code>&lt;Image.Source&gt; &lt;BitmapImage DecodePixelWidth="50" UriSource="http://member.org/6bc64e7b-2df5-40d5-b6c4-eaf732318222.jpg" /&gt; &lt;/Image.Source&gt; </code></pre> <p>Update:</p> <p>This is the MemberImage property implementation.</p> <pre><code>public BitmapImage MemberImage { get { var image = new BitmapImage(); if (this.Member != null) { WebRequest request = WebRequest.Create(new Uri(this.Member.ImageFilePath, UriKind.Absolute)); request.Timeout = -1; WebResponse response = request.GetResponse(); Stream responseStream = response.GetResponseStream(); BinaryReader reader = new BinaryReader(responseStream); MemoryStream memoryStream = new MemoryStream(); byte[] bytebuffer = new byte[BytesToRead]; int bytesRead = reader.Read(bytebuffer, 0, BytesToRead); while (bytesRead &gt; 0) { memoryStream.Write(bytebuffer, 0, bytesRead); bytesRead = reader.Read(bytebuffer, 0, BytesToRead); } image.BeginInit(); memoryStream.Seek(0, SeekOrigin.Begin); image.StreamSource = memoryStream; image.EndInit(); } return image; } } </code></pre> <p>Update:</p> <p>This is how I am binding to the control in my view:</p> <pre><code>&lt;Image Width="50" Source="{Binding MemberImage}" /&gt; </code></pre> <p>MemberImage is the property I have given above. My data context is being set correctly because that property is being run, it's just not returning an image.</p>
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