using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Globalization;
using System.Text;

/*
ExifReader 0.1 by Neil Moomey, www.neilmoomey.com
Digital cameras embed EXIF metadata into their images.
This C# class will extract that data.
EXIF tag specifications at http://www.exif.org/specifications.html
This project is a work in progress.  If you add to it please send me a copy.

Example of use:
ExifReader r = new ExifReader("C:\\photos\\img_001.jpg");
Console.WriteLine("Exposure Time: " + r.GetExposureTime() + " Sec");
You can also run this as a stand alone Console Program like this:
ExifReader "C:\photos\img_001.jpg"
(Use quotes if you have spaces in your path)

Copyright Neil Moomey, All Rights Reserved.
You may use this code in your projects at no charge but I retain the Copyright to this code.
*/

namespace slideshow_0_4
{
	public class ExifReader
	{
		//private System.ComponentModel.Container components = null;
		DateTimeFormatInfo m_dateTimeFormat = new DateTimeFormatInfo();
		private ASCIIEncoding ascii;
		private Image image;
		int[] MyPropertyIdList;

		public ExifReader(String file)
		{
			try
			{
				image = Image.FromFile(file);
				MyPropertyIdList = image.PropertyIdList;  //Array
				Console.WriteLine("\nMyPropertyIdList.Length= "+ MyPropertyIdList.Length);
				ascii = new ASCIIEncoding(); //System.Text
			}
			catch (Exception e)
			{
				Console.WriteLine("Reading Image Error: "+ e);
			}
		}


		public void PrintAll()
		{
			try
			{
				int i=0;
				Console.WriteLine("Count" + "\t" + "Decimal Tag" + "\t" + "Hex Tag");
				foreach (int MyPropertyId in MyPropertyIdList)
				{
						PropertyItem propItem = image.GetPropertyItem(MyPropertyId);
						int propDec = MyPropertyIdList[i]; //Decimal Tag ID
						String propHex = propItem.Id.ToString("x"); // Hexadecimal Tag ID (Use Decimal instead)
						Console.WriteLine(i + "\t" + propDec + "\t\t" + propHex);
						i++;
				}
			}
			catch (Exception e)
			{
					if (e.GetType().ToString() != "System.ArgumentNullException")
					{
					}
			}
		}

		//256 ImageWidth
		public String GetImageWidth()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(256);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//257 ImageLength
		public String GetImageLength()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(257);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//258 BitsPerSample
		public String GetBitsPerSample()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(258);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//259 Compression
		public String GetCompression()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(259);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//262 PhotometricInterpretation
		//270 ImageDescription

		//271 Make				ASCII
		public String GetMake()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(271);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//272 Model
		public String GetModel()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(272);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//273 StripOffsets

		//274 Orientation		Short
		public String GetOrientation()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(274);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if(pv0=="1")return"Correct";
			if(pv0=="6")return"Rotate Right";
			if(pv0=="8")return"Rotate Left";
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//277 SamplesPerPixel 	Short
		//278 RowsPerStrip
		//279 StripByteCounts
		//282 XResolution		Rational
		//283 YResolution
		//284 PlanarConfiguration
		//296 ResolutionUnit
		//301 TransferRate

		//305 Software
		public String GetSoftware()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(305);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//306 DateTime
		public String GetDateTime()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(306);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//315 Artist				ASCII
		public String GetArtist()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(315);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//218 WhitePoint
		//319 PrimaryChromaticities
		//513 JPEGInterchangeFormat
		//514 JPEGInterchangeFormatLength
		//529 YCbCrCoefficients
		//530 YCbCrCoefficients
		//530 YCbCrSubSampling
		//531 YCbCrPositioning
		//532 ReferenceBlackWhite

		//33432 Copyright			ASCII
		public String GetCopyright()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(33432);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//34665 Exif IFD Pointer
		//34853 GPSInfo IFD Pointer

		// Same as Shutter Speed
		public String GetExposureTime()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(33434);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				String pv1 = BitConverter.ToInt16(propItem.Value,4).ToString();
				// Turn 10/2500 into 1/250
				if (pv0.EndsWith("0") && pv1.EndsWith("0"))
				{
					pv0 = pv0.Substring(0,pv0.Length-1);
					pv1 = pv1.Substring(0,pv1.Length-1);
				}
				//Turn 8/1 into 8
				if (pv1=="1") return pv0;
				return pv0 + "/" + pv1;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";


		}

		//Same as FStop
		public String GetFNumber()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(33437);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				if (pv0.Length == 3) pv0 = pv0.Substring(0,2);
				if (pv0 != "22" && pv0 != "32" && !pv0.StartsWith("1"))
					pv0 = pv0.Substring(0,pv0.Length-1)+"."+pv0.Substring(pv0.Length-1,1);
				pv0=pv0.Replace(".0","");
				return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//********No tag in my jpegs
		public String GetExposureProgram()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(34850);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				if (pv0 == "0") return "Not Defined";
				if (pv0 == "1") return "Manual";
				if (pv0 == "2") return "Program";
				if (pv0 == "3") return "Aperature Priority";
				if (pv0 == "4") return "Shutter Priority";
				if (pv0 == "5") return "Creative Program";
				if (pv0 == "6") return "Action Program";
				if (pv0 == "7") return "Portait Mode";
				if (pv0 == "8") return "Landscape Mode";
				return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//34852 SpectralSensitivity	ASCII
		public String GetSpectralSensitivity()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(34852);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//34855 ISO
		public String GetISO()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(34855);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//34856 OECF	Undefined (Opto-Electric Conversion Function)

		public String GetExifVersion()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(36864);
				//ASCII
				String pv = ascii.GetString(propItem.Value);
				// Turn 0220 into 02.20
				pv = pv.Substring(0,2)+"."+pv.Substring(2,pv.Length-2);
				// Turn 02.20 into 2.20
				if (pv.StartsWith("0")) pv = pv.Substring(1,pv.Length-1);
				//Console.WriteLine("Model = " + decodedString);
				return pv;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";

		}

		//36867 DateTimeOriginal
		public String GetDateTimeOriginal()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(36867);
				String decodedString = ascii.GetString(propItem.Value);
				//Console.WriteLine("Model = " + decodedString);
				return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//36868 DateTimeDigitized			ASCII
		public String GetDateTimeDigitized()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(36868);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//37121 ComponentsConfiguration		Undefined
		//37122 CompressedBitsPerPixel		Rational
		//37377 ShutterSpeedValue 			SRational (Not the same as exposure for some reason.)
		//37378 ApertureValue 				Rational (Not the same as FNumber for some reason.)
		//37379 BrightnessValue				SRational

		//37380 ExposureBiaValue
		public String GetExposureBiasValue()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(37380);
				float pvf = (float)(BitConverter.ToInt16(propItem.Value,0))/2;
				String pv0 = pvf.ToString();
				if (!pv0.StartsWith("-")) pv0 = "+" + pv0;
				return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//37381 MaxApertureValue	Rational

		//37382 SubjectDistance
		public String GetSubjectDistance()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(37382);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}



		//37383 MeteringMode
		public String GetMeteringMode()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(37383);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if(pv0=="1")return "Average Metering";
			if(pv0=="2")return "Center Weighted Average Metering";
			if(pv0=="3")return "Spot Metering";
			if(pv0=="4")return "MultiSpot Metering";
			if(pv0=="5")return "Matrix Metering";
			if(pv0=="6")return "Partial Metering";

			return "Unknown";
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//37384 LightSource

		//37385 Flash
		public String GetFlash()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(37385);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if (pv0=="0") return "No Flash";
			if (pv0=="1") return "Flash";
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//37386 FocalLength
		public String GetFocalLength()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(37386);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//37396 SubjectArea				Short
		public String GetSubjectArea()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(37396);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//37500 MakerNote				Undefined
		//37510 UserCommment			Undefined
		//37520 SubSecTime				ASCII
		//37521 SubSecTimeOriginal		ASCII
		//37522 SubSecTimeDigitized		ASCII
		//40960 FlashpixVersion			Undefined
		//40961 ColorSpace				Short
		//40962 PixelXDimension			Short
		//40963 PixelYDimension			Short
		//40964 RelatedSoundFile		ASCII
		//41483 FlashEnergy				Rational
		//41484 SpatialFrequencyResponse
		//41486 FocalPlaneXResolution
		//41487 FocalPlaneYResolution
		//41488 FocalPlaneResolutionUnit

		//41492 SubjectLocation			Short
		public String GetSubjectLocation()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41492);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41493 ExposureIndex			Rational
		//41495 SensingMethod			Short
		//41728 FileSource
		//41729 ScenType
		//41730 CFAPattern


		//41986 ExposureMode
		public String GetExposureMode()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(41986);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				if (pv0=="0") return "Auto Exposure";
				if (pv0=="1") return "Manual Exposure";
				if (pv0=="2") return "Auto Bracket";
				if (pv0=="3") return "Reserved";
				return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41987 WhiteBalance
		public String GetWhiteBalance()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(41987);
				String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
				if (pv0=="0") return "Auto";
				if (pv0=="1") return "Manual";
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41988 DigitalZoomRatio
		public String GetDigitalZoomRatio()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41989);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if(pv0=="0") return "No Digital Zoom Used";
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}



		//41989 FocalLengthIn35mmFilm		Short
		public String GetFocalLengthIn35mmFilm()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41989);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41990 SceneCaptureType
		//41991 GainControl

		//41992 Contrast					Short
		public String GetContrast()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41992);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if(pv0=="0") return "Normal";
			if(pv0=="1") return "Soft";
			if(pv0=="2") return "Hard";
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41993 Saturation					Short
		public String GetSaturation()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41993);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if(pv0=="0") return "Normal";
			if(pv0=="1") return "Low";
			if(pv0=="2") return "High";
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41994 Sharpness					Short
		public String GetSharpness()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41994);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			if(pv0=="0") return "Normal";
			if(pv0=="1") return "Soft";
			if(pv0=="2") return "Hard";
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//41995 DeviceSettingDescription

		//41996 SubjectDistanceRange		Short
		public String GetSubjectDistanceRange()
		{
			try
			{
			PropertyItem propItem = image.GetPropertyItem(41996);
			String pv0 = BitConverter.ToInt16(propItem.Value,0).ToString();
			return pv0;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		//42016 ImageUniqueID
		public String GetImageUniqueID()
		{
			try
			{
				PropertyItem propItem = image.GetPropertyItem(42016);
				String decodedString = ascii.GetString(propItem.Value);
			return decodedString;
			}
			catch (Exception e)
			{
				if (e.GetType().ToString() != "System.ArgumentNullException")
				{
				}
			}
			return "";
		}

		// Release Image object so we can delete file if we wish
		public void MyDispose()
		{
			image.Dispose();
		}


/*
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		public static void Main(String[]Args)
		{
			if (Args.Length != 1)
			{
				Console.WriteLine("Usage: ExifReader <path to image>");
				Environment.Exit(-1);
			}

			String file = Args[0];

			ExifReader r = new ExifReader(file);  //file is String

			Console.WriteLine("");
			r.PrintAll();
			Console.WriteLine("");
			Console.WriteLine("Make: " + r.GetMake());
			Console.WriteLine("Model: " + r.GetModel());

			Console.WriteLine("White Balance: " + r.GetWhiteBalance());
			// User this one for FStop
			Console.WriteLine("F" + r.GetFNumber());
			// Use this one for Shutter Speed
			Console.WriteLine("Exposure Time: " + r.GetExposureTime() + " Sec");
			Console.WriteLine("Exposure Program: " + r.GetExposureProgram());
			Console.WriteLine("ISO: " + r.GetISO());
			Console.WriteLine("Exposure Bias Value: " + r.GetExposureBiasValue());
			Console.WriteLine("Subject Distance: " + r.GetSubjectDistance());
			Console.WriteLine("FocalLength: " + r.GetFocalLength());

			Console.WriteLine("Flash: " + r.GetFlash());
			Console.WriteLine("Exposure Mode: " + r.GetExposureMode());
			Console.WriteLine("EXIF Version: " + r.GetExifVersion());
			Console.WriteLine("DateTime: " + r.GetDateTime());
			Console.WriteLine("DateTimeOriginal: " + r.GetDateTimeOriginal());
			Console.WriteLine("Artist: " + r.GetArtist());
			Console.WriteLine("Copyright: " + r.GetCopyright());
			Console.WriteLine("Software: " + r.GetSoftware());
			Console.WriteLine("SpectralSensitivity: " + r.GetSpectralSensitivity());
			Console.WriteLine("DateTimeDigitized: " + r.GetDateTimeDigitized());
			Console.WriteLine("ImageWidth: " + r.GetImageWidth());
			Console.WriteLine("ImageLength: " + r.GetImageLength());
			Console.WriteLine("BitsPerSample: " + r.GetBitsPerSample());
			Console.WriteLine("Compression: " + r.GetCompression());
			Console.WriteLine("Orientation: " + r.GetOrientation());
			Console.WriteLine("SubjectArea: " + r.GetSubjectArea());
			Console.WriteLine("SubjectLocation: " + r.GetSubjectLocation());
			Console.WriteLine("FocalLengthIn35mmFilm: " + r.GetFocalLengthIn35mmFilm());
			Console.WriteLine("Contrast: " + r.GetContrast());
			Console.WriteLine("Saturation: " + r.GetSaturation());
			Console.WriteLine("Sharpness: " + r.GetSharpness());
			Console.WriteLine("SubjectDistanceRange: " + r.GetSubjectDistanceRange());
			Console.WriteLine("MeteringMode: " + r.GetMeteringMode());
			Console.WriteLine("DigitalZoomRatio: " + r.GetDigitalZoomRatio());
			Console.WriteLine("ImageUniqueID: " + r.GetImageUniqueID());
			//Console.WriteLine(": " + r.Get());


		}
*/

	}
}