从读取JPEG，XMP和EXIF数据的元数据在C＃

问题描述

我一直在四处寻找的元数据读取一个体面的方式（具体拍摄日期）的JPEG文件在C＃中，和我来了有点短。现有的信息，据我所看到的，显示如下所示的代码;

I've been looking around for a decent way of reading metadata (specifically, the date taken) from JPEG files in C#, and am coming up a little short. Existing information, as far as I can see, shows code like the following;

BitmapMetadata bmd = (BitmapMetadata)frame.Metadata;
string a1 = (string)bmd.GetQuery("/app1/ifd/exif:{uint=36867}");

但在我的无知，我不知道会返回一个元数据GetQuery位（），或者什么通过它。

But in my ignorance I have no idea what bit of metadata GetQuery() will return, or what to pass it.

我要首先尝试读取XMP，回落至EXIF如果XMP不存在。有没有这样做？

I want to attempt reading XMP first, falling back to EXIF if XMP does not exist. Is there a simple way of doing this?

感谢。

推荐答案

下面似乎很好地工作，但如果有一些不好的话，我会很感激任何意见。

The following seems to work nicely, but if there's something bad about it, I'd appreciate any comments.

    public string GetDate(FileInfo f)
    {
        using(FileStream fs = new FileStream(f.FullName, FileMode.Open, FileAccess.Read, FileShare.Read))
        {
            BitmapSource img = BitmapFrame.Create(fs);
            BitmapMetadata md = (BitmapMetadata)img.Metadata;
            string date = md.DateTaken;
            Console.WriteLine(date);
            return date;
        }
    }

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