c# - Exception thrown when reading meta data from .tif file using c# and metadata extractor

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 意味着您的 FullPath 不包含实际在磁盘上的文件。

尝试添加：

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

还要仔细检查 .tif 和 .tiff。

编辑您的屏幕截图显示丢失的文件是XmpCore.dll. 当您添加对 的 NuGet 引用时MetadataExtractor，您还应该选择XmpCore.

这是一个例子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>

确保您也有相关的项目参考资料。

使用上述内容构建新的 .NET 4.5 控制台项目后packages.config，bin/Debug文件夹如下所示：

packages以及文件夹的内容：

Answer 2

我通过在解决方案资源管理器中的引用下将 XmpCore 的 Copy Local 属性更改为 True 来解决异常。