使用C＃和元数据提取器从.tif文件读取元数据时引发异常

Question

I am trying to read the metadata from a .tif file using the Metadata Extractor dll and I keep getting a FileIsNotFoundException. It works fine when I try the same code using a .jpeg file.

FileStream OriginalFile = new FileStream(FullPath, FileMode.Open, FileAccess.Read, FileShare.Read);
IEnumerable<MetadataExtractor.Directory> directories = ImageMetadataReader.ReadMetadata(OriginalFile);
foreach (var directory in directories)
    foreach (var tag in directory.Tags)
        Console.WriteLine($"{directory.Name} - {tag.Name} = {tag.Description}");

Edit : I re-installed the package and now have the XmpCore.dll inside the packages folder of my project but I still see the same exception as before. Works fine for .jpeg and .psd files.

Exception thrown when trying open a .tiff image

Answer 1

FileNotFoundException means that your FullPath doesn't contain a file that's actually on disk.

Try adding:

Console.WriteLine(FullPath);
Console.WriteLine(File.Exists(FullPath));

Also double check between .tif and .tiff.

EDIT Your screenshot shows the missing file is XmpCore.dll . When you added the NuGet reference to MetadataExtractor , you should also have picked up XmpCore .

Here's an example of packages.config :

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="MetadataExtractor" version="1.5.3" targetFramework="net45" />
  <package id="SharpZipLib" version="0.86.0" targetFramework="net45" />
  <package id="XmpCore" version="1.2.2" targetFramework="net45" />
</packages>

Ensure you also have the relevant project references.

After building a new .NET 4.5 console project with the above packages.config , the bin/Debug folder looked like this:

And the contents of the packages folder:

Answer 2

我通过将解决方案资源管理器中“引用”下的XmpCore的“复制本地”属性更改为True来解决了该异常。