使用C#读取 NEF类型和JPG类型照片的拍摄时间

需要下载

MetadataExtractor 和 System.Drawing.Imaging 两个 NuGet 包

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using MetadataExtractor;
using MetadataExtractor.Formats.Exif;
using System.Drawing;
using System.Drawing.Imaging;
using System.Globalization;

namespace PhototDemo
{
    class Program
    {
        static string path = @"J:\phtoto";
        static string totalPhotoPath = @"J:\Total_Photo";
        static string txtPath = @"J:\Total_Photo\record.txt";
        static void Main(string[] args)
        {
            string[] files = System.IO.Directory.GetFiles(path, "*.*", SearchOption.AllDirectories);
            string dir = "";
            string timePath = "";
            string name = "";
            string time = "";
            string timeDir = "";
            //foreach (string file in files)
            int Length = files.Length;
            for (int i = 0; i < Length; i++)
            {
                string file = files[i];
                if (file.Contains(".NEF"))
                {
                    time = GetNEFTime(file);
                    timePath = time + "\\NEF";
                }
                if(file.Contains(".JPG"))
                {
                    time = GetJPGETime(file);
                    timePath = time + "\\JPG";
                }
                dir = totalPhotoPath + "\\" + timePath;
                timeDir = totalPhotoPath + "\\" + time;
                if (!System.IO.Directory.Exists(timeDir))
                {
                    System.IO.Directory.CreateDirectory(timeDir);
                }
                if (!System.IO.Directory.Exists(dir)) 
                {
                    System.IO.Directory.CreateDirectory(dir);
                }
                name = Path.GetFileName(file);
                File.Copy(file, dir + "\\" + name, true);
                Console.WriteLine(file);
                File.AppendAllText(txtPath, file + "\n");
            }
        }

        private static string GetNEFTime(string file)
        {
            IEnumerable<MetadataExtractor.Directory> metaDirectories = ImageMetadataReader.ReadMetadata(file);
            var ifd0Directory = metaDirectories.OfType<ExifIfd0Directory>().SingleOrDefault();
            string time = ifd0Directory.GetString(ExifDirectoryBase.TagDateTime);
            string[] temps = time.Split(':');
            temps[2] = temps[2].Substring(0, 2);
            return (temps[0] + "_" + temps[1] + "_" + temps[2]);
        }

        private static string GetJPGETime(string file)
        {
            Image theImage = Image.FromFile(file);
            PropertyItem[] propItems = theImage.PropertyItems;
            PropertyItem propItem = theImage.GetPropertyItem(0x9003);
            Byte[] propItemValue = propItem.Value;
            string dateTimeStr = System.Text.Encoding.ASCII.GetString(propItemValue).Trim('\0');
            DateTime dt = DateTime.ParseExact(dateTimeStr, "yyyy:MM:dd HH:mm:ss", CultureInfo.InvariantCulture);
            string newDTstr = dt.ToString("yyyy_MM_dd");
            theImage.Dispose();
            return newDTstr;
        }
    }
}