Exif 信息读取与遍历

墨蓝 2022-09-10 00:11 223阅读 0赞

# Exif信息资料 #

Exif  
https://www.cnblogs.com/suyuanli/p/8168407.html  
https://zhuanlan.zhihu.com/p/366726838  
https://www.exiftool.org/TagNames/GPS.html

![40e2d168639635de6377142113144724.png][]

# Code #

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using System.Diagnostics;
    using ExifLib;
    
    namespace PhotoManagerTool
    {
        public partial class FormMain : Form
        {
    
            // Exif
            // https://www.cnblogs.com/suyuanli/p/8168407.html
            // https://zhuanlan.zhihu.com/p/366726838
            // https://www.exiftool.org/TagNames/GPS.html
            public struct PhotoExif
            {
                public String Make; // 厂商
                public String Model; // 型号
                public UInt16 Angle; // 旋转角度
                public String Software; // 软件版本
                public DateTime Dt; // 拍摄时间
                public Double[] GPS_la; // GPSLatitude 
                public Double[] GPS_lon; // GPSLongitude 
                public Double GPS_al; // GPSAltitude 
                public override string ToString()
                {
                    return $"{Dt}, {Make}/{Model}, {Angle}, {GPS_al}";
                }
            }
    
            public FormMain()
            {
                InitializeComponent();
            }
            public Boolean ParsePhotoExif(string path, out PhotoExif pe)
            {
                try
                {
                    using (ExifReader reader = new ExifReader(path))
                    {
                        reader.GetTagValue<String>(ExifTags.Make, out pe.Make);
                        reader.GetTagValue<String>(ExifTags.Model, out pe.Model);
                        reader.GetTagValue<String>(ExifTags.Software, out pe.Software);
                        reader.GetTagValue<UInt16>(ExifTags.Orientation, out pe.Angle);
                        reader.GetTagValue<DateTime>(ExifTags.DateTime, out pe.Dt);
                        reader.GetTagValue<Double[]>(ExifTags.GPSLatitude, out pe.GPS_la);
                        reader.GetTagValue<Double[]>(ExifTags.GPSLongitude, out pe.GPS_lon);
                        reader.GetTagValue<Double>(ExifTags.GPSAltitude, out pe.GPS_al);
                    }
                }catch(Exception e)
                {
                    pe = default;
                    return false;
                }
                return true;
            }
    
            public void ParsePhotoExifAll(string path)
            {
                using (ExifReader reader = new ExifReader(path))
                {
                    foreach(ExifTags tag in typeof(ExifTags).GetEnumValues())
                    {
                        Object obj;
                        var out_val = "";
                        if (reader.GetTagValue<Object>(tag, out obj))
                        {
                            out_val = obj.ToString();
                            switch ( obj.GetType().ToString())
                            {
                                case "System.Byte[]":
                                    out_val = String.Join(",", (Byte[])obj);
                                    break;
                                case "System.UInt16[]":
                                    out_val = String.Join(",", (UInt16[])obj);
                                    break;
                                case "System.Double[]":
                                    out_val = String.Join(",", (Double[])obj);
                                    break;
                                default:
                                    break;
                            }
                        }
                        Debug.WriteLine($"{tag} \t=> \t{out_val}");
                    }
                }
            }
    
            private void button_test_Click(object sender, EventArgs e)
            {
                ParsePhotoExifAll("E:/t1.jpg");
                PhotoExif pe;
                ParsePhotoExif("E:/t1.jpg", out pe);
                Debug.WriteLine(pe);
            }
        }
    }

[40e2d168639635de6377142113144724.png]: /images/20220829/d33e6dbd96b44635854d79b3c7ff96ba.png