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POIValueConverter -- FileImageConverter -- Not Displaying Generic Image
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copied!<p>I am using a <code>FileToImageConverter</code> to display a image based on the file extension.</p> <p>Everything works for normal extensions .xlsx, .doc, .docx, because I have a image for that extension in the Media folder, but if the filename has a extension that is not in the media folder of the project, then no image is being displayed. I want to try and assign a generic image for all file extensions that do not have a extension in the folder.</p> <p>So if the file was test.sql then assign something like file_extension_file.png as the generic icon. the normal icons are stored like file_extension_xlsx.png</p> <p>Here is the original Converter</p> <pre><code>public class ConvertFileImageConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (value as string == string.Empty) return null; string file_extension = System.IO.Path.GetExtension(value.ToString()); file_extension = file_extension.Replace(".", ""); var file = @"/Media/file_extension_" + file_extension + ".png"; ImageSource src = new BitmapImage(new Uri(file, UriKind.Relative)); return src; } } </code></pre> <p>This is hitting the try still</p> <pre><code>if (value as string == string.Empty) return null; string file_extension = System.IO.Path.GetExtension(value.ToString()); file_extension = file_extension.Replace(".", ""); var file = @"/Media/file_extension_" + file_extension + ".png"; var genericfile = @"/Media/file_extension_file.png"; try { return new BitmapImage(new Uri(file, UriKind.Relative)); } catch (FileNotFoundException exception) { return new BitmapImage(new Uri(genericfile, UriKind.Relative)); } </code></pre> <p>Updated: Here are some of the images etc.</p> <p><img src="https://i.stack.imgur.com/TBltL.png" alt="enter image description here"></p> <p>This is setting everything to the default image with the !File exists even if the extension is in the folder.</p> <pre><code>private static ImageSource DefaultImage = new BitmapImage(new Uri(@"/Media/file_extension_file.png", UriKind.Relative)); public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { var filename = (string)value; if(string.IsNullOrWhiteSpace(filename)) { return DefaultImage; } var extension = Path.GetExtension(filename).Replace(".", string.Empty); var imageName = @"/Media/file_extension_" + extension + ".png"; if (!File.Exists(imageName)) { return DefaultImage; } return new BitmapImage(new Uri(imageName, UriKind.Relative)); } </code></pre> <p>The filenames being passed in look like test.doc, test.docx, test.sql, test.xls etc.</p> <p>locals are showing below: the highlighted red is what it is looking for in the Media folder, but there is not one, so I am trying to show the Default Image.</p> <p><img src="https://i.stack.imgur.com/PMqQq.png" alt="enter image description here"></p>

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