Проблема C# привязка тегов метаданных к списку для 0x5013 и 0x5014.
Привет,
Я хочу отобразить определенные метаданные в моем списке для выбранного изображения в моем средстве просмотра изображений, которого нет в этой библиотеке Asim Goheer, которую я использую. https://www.codeproject.com/Articles/11305/EXIFextractor-library-to-extract-EXIF-information?msg=5528243#xx5528243xx
ПРОБЛЕМА:
К сожалению, у меня возникли проблемы с реализацией новых тегов, которых не было в EXIFextractor.Метод BuildDB ().
Системы.Исключение NullReferenceException. Системы.Исключение NullReferenceException: Объекта
ссылка не установлена на экземпляр объекта.' bmp был равен нулю.
Это происходит после попытки я установил тег для
er2.setTag(0x5013,"Thumbnail Width");
в моей форме.
На самом деле это происходит с любым тегом. Я пытаюсь реализовать код как для 0x5014,"Высота миниатюры", так и для 0x5013,"ширина миниатюры".
Вот мой код для моей формы Windows, только этот код мой. Классы ниже, где написано Асим Гохир, спасибо.
Форма 1.
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Web.UI;
namespace PictureViewer
{
public partial class Form1 : Form
{
string _big_fileName;
int _counter = 0;
int _imageIndex;
#region Initializers
public Form1()
{
InitializeComponent();
}
//Displays larger instance of selected image in picture box.
private void lstImages_SelectedIndexChanged(object sender, EventArgs e)
{
//FOR i is less than the first image.
for (int i = 0; i < lstImages.SelectedItems.Count; i++)
{
//GET filename from listview and store in index.
_big_fileName = lstImages.SelectedItems[i].Text;
//Create larger instance of image.
pictureBox1.Image = Image.FromFile(_big_fileName);
//Fill panel to the width and height of picture box.
panel1.AutoScrollMinSize = new Size(pictureBox1.Image.Width, pictureBox1.Image.Height);
_imageIndex = lstImages.SelectedIndices[0];
loadImageMetaData();
}
}
#endregion Initializers
#region File Menu Events
private void mnuOpen_Click(object sender, EventArgs e)
{
loadImageList();
_imageIndex = 0;
}
#region Methods
private void loadImageList()
{
imageList1.Images.Clear();
lstImages.Clear();
oFD1.InitialDirectory = "C:\\";
oFD1.Title = "Open an Image File";
oFD1.Filter = "JPEGS|*.jpg|GIFS|*.gif|PNGS|*.png|BMPS|*.bmp";
//Open Dialog Box.
var oldResults = oFD1.ShowDialog();
if (oldResults == DialogResult.Cancel)
{
return;
}
try
{
//GET amount of filenames.
int num_of_files = oFD1.FileNames.Length;
//Store filenames in string array.
string[] arryFilePaths = new string[num_of_files];
//FOREACH filename in the file.
foreach (string single_file in oFD1.FileNames)
{
//ACCESS array using _counter to find file.
arryFilePaths[_counter] = single_file;
//CREATE image in memory and add image to image list.
imageList1.Images.Add(Image.FromFile(single_file));
_counter++;
}
//BIND image list to listview.
lstImages.LargeImageList = imageList1;
for (int i = 0; i < _counter; i++)
{
//DISPLAY filename and image from image index param.
lstImages.Items.Add(arryFilePaths[i], i);
}
}
catch (Exception ex)
{
MessageBox.Show("Error " + ex.Message);
}
}
private void loadImageMetaData()
{
lstImageMetaData.Items.Clear();
Encoding ascii = Encoding.ASCII;
EXIF.EXIFextractor er2 = new EXIF.EXIFextractor(_big_fileName, "","");
foreach (Pair s in er2)
{
lstImageMetaData.Items.Add(s.First + " : " + s.Second);
}
lstImageMetaData.SelectedIndex = lstImageMetaData.Items.Count - 1;
er2.setTag(0x5013,"Thumbnail Width");
}
#endregion Methods
}
}
Ошибка заключается в этом методе
public void setTag(int id, int len, short type, byte [] data)
{
PropertyItem p = CreatePropertyItem(type,id,len,data);
this.bmp.SetPropertyItem( p );
buildDB(this.bmp.PropertyItems);
} На этой самой линии. this.bmp.SetPropertyItem(p);
Вот весь код для EXIFextractor.
using System;
using System.Text;
using System.Collections;
using System.Drawing.Imaging;
using System.Reflection;
using System.IO;
using System.Web.UI;
namespace EXIF
{
/// <summary>
/// EXIFextractor Class
///
/// </summary>
public class EXIFextractor : IEnumerable
{
/// <summary>
/// Get the individual property value by supplying property name
/// These are the valid property names :
///
/// "Exif IFD"
/// "Gps IFD"
/// "New Subfile Type"
/// "Subfile Type"
/// "Image Width"
/// "Image Height"
/// "Bits Per Sample"
/// "Compression"
/// "Photometric Interp"
/// "Thresh Holding"
/// "Cell Width"
/// "Cell Height"
/// "Fill Order"
/// "Document Name"
/// "Image Description"
/// "Equip Make"
/// "Equip Model"
/// "Strip Offsets"
/// "Orientation"
/// "Samples PerPixel"
/// "Rows Per Strip"
/// "Strip Bytes Count"
/// "Min Sample Value"
/// "Max Sample Value"
/// "X Resolution"
/// "Y Resolution"
/// "Planar Config"
/// "Page Name"
/// "X Position"
/// "Y Position"
/// "Free Offset"
/// "Free Byte Counts"
/// "Gray Response Unit"
/// "Gray Response Curve"
/// "T4 Option"
/// "T6 Option"
/// "Resolution Unit"
/// "Page Number"
/// "Transfer Funcition"
/// "Software Used"
/// "Date Time"
/// "Artist"
/// "Host Computer"
/// "Predictor"
/// "White Point"
/// "Primary Chromaticities"
/// "ColorMap"
/// "Halftone Hints"
/// "Tile Width"
/// "Tile Length"
/// "Tile Offset"
/// "Tile ByteCounts"
/// "InkSet"
/// "Ink Names"
/// "Number Of Inks"
/// "Dot Range"
/// "Target Printer"
/// "Extra Samples"
/// "Sample Format"
/// "S Min Sample Value"
/// "S Max Sample Value"
/// "Transfer Range"
/// "JPEG Proc"
/// "JPEG InterFormat"
/// "JPEG InterLength"
/// "JPEG RestartInterval"
/// "JPEG LosslessPredictors"
/// "JPEG PointTransforms"
/// "JPEG QTables"
/// "JPEG DCTables"
/// "JPEG ACTables"
/// "YCbCr Coefficients"
/// "YCbCr Subsampling"
/// "YCbCr Positioning"
/// "REF Black White"
/// "ICC Profile"
/// "Gamma"
/// "ICC Profile Descriptor"
/// "SRGB RenderingIntent"
/// "Image Title"
/// "Copyright"
/// "Resolution X Unit"
/// "Resolution Y Unit"
/// "Resolution X LengthUnit"
/// "Resolution Y LengthUnit"
/// "Print Flags"
/// "Print Flags Version"
/// "Print Flags Crop"
/// "Print Flags Bleed Width"
/// "Print Flags Bleed Width Scale"
/// "Halftone LPI"
/// "Halftone LPIUnit"
/// "Halftone Degree"
/// "Halftone Shape"
/// "Halftone Misc"
/// "Halftone Screen"
/// "JPEG Quality"
/// "Grid Size"
/// "Thumbnail Format"
/// "Thumbnail Width"
/// "Thumbnail Height"
/// "Thumbnail ColorDepth"
/// "Thumbnail Planes"
/// "Thumbnail RawBytes"
/// "Thumbnail Size"
/// "Thumbnail CompressedSize"
/// "Color Transfer Function"
/// "Thumbnail Data"
/// "Thumbnail ImageWidth"
/// "Thumbnail ImageHeight"
/// "Thumbnail BitsPerSample"
/// "Thumbnail Compression"
/// "Thumbnail PhotometricInterp"
/// "Thumbnail ImageDescription"
/// "Thumbnail EquipMake"
/// "Thumbnail EquipModel"
/// "Thumbnail StripOffsets"
/// "Thumbnail Orientation"
/// "Thumbnail SamplesPerPixel"
/// "Thumbnail RowsPerStrip"
/// "Thumbnail StripBytesCount"
/// "Thumbnail ResolutionX"
/// "Thumbnail ResolutionY"
/// "Thumbnail PlanarConfig"
/// "Thumbnail ResolutionUnit"
/// "Thumbnail TransferFunction"
/// "Thumbnail SoftwareUsed"
/// "Thumbnail DateTime"
/// "Thumbnail Artist"
/// "Thumbnail WhitePoint"
/// "Thumbnail PrimaryChromaticities"
/// "Thumbnail YCbCrCoefficients"
/// "Thumbnail YCbCrSubsampling"
/// "Thumbnail YCbCrPositioning"
/// "Thumbnail RefBlackWhite"
/// "Thumbnail CopyRight"
/// "Luminance Table"
/// "Chrominance Table"
/// "Frame Delay"
/// "Loop Count"
/// "Pixel Unit"
/// "Pixel PerUnit X"
/// "Pixel PerUnit Y"
/// "Palette Histogram"
/// "Exposure Time"
/// "F-Number"
/// "Exposure Prog"
/// "Spectral Sense"
/// "ISO Speed"
/// "OECF"
/// "Ver"
/// "DTOrig"
/// "DTDigitized"
/// "CompConfig"
/// "CompBPP"
/// "Shutter Speed"
/// "Aperture"
/// "Brightness"
/// "Exposure Bias"
/// "MaxAperture"
/// "SubjectDist"
/// "Metering Mode"
/// "LightSource"
/// "Flash"
/// "FocalLength"
/// "Maker Note"
/// "User Comment"
/// "DTSubsec"
/// "DTOrigSS"
/// "DTDigSS"
/// "FPXVer"
/// "ColorSpace"
/// "PixXDim"
/// "PixYDim"
/// "RelatedWav"
/// "Interop"
/// "FlashEnergy"
/// "SpatialFR"
/// "FocalXRes"
/// "FocalYRes"
/// "FocalResUnit"
/// "Subject Loc"
/// "Exposure Index"
/// "Sensing Method"
/// "FileSource"
/// "SceneType"
/// "CfaPattern"
/// "Gps Ver"
/// "Gps LatitudeRef"
/// "Gps Latitude"
/// "Gps LongitudeRef"
/// "Gps Longitude"
/// "Gps AltitudeRef"
/// "Gps Altitude"
/// "Gps GpsTime"
/// "Gps GpsSatellites"
/// "Gps GpsStatus"
/// "Gps GpsMeasureMode"
/// "Gps GpsDop"
/// "Gps SpeedRef"
/// "Gps Speed"
/// "Gps TrackRef"
/// "Gps Track"
/// "Gps ImgDirRef"
/// "Gps ImgDir"
/// "Gps MapDatum"
/// "Gps DestLatRef"
/// "Gps DestLat"
/// "Gps DestLongRef"
/// "Gps DestLong"
/// "Gps DestBearRef"
/// "Gps DestBear"
/// "Gps DestDistRef"
/// "Gps DestDist"
/// </summary>
public object this[string index]
{
get
{
return properties[index];
}
}
//
private System.Drawing.Bitmap bmp;
//
private string data;
//
private translation myHash;
//
private Hashtable properties;
//
internal int Count
{
get
{
return this.properties.Count;
}
}
//
string sp;
/// <summary>
///
/// </summary>
/// <param name="id"></param>
/// <param name="len"></param>
/// <param name="type"></param>
/// <param name="data"></param>
public void setTag(int id, string data)
{
Encoding ascii = Encoding.ASCII;
this.setTag(id,data.Length,0x2,ascii.GetBytes(data));
}
/// <summary>
///
/// </summary>
/// <param name="id"></param>
/// <param name="len"></param>
/// <param name="type"></param>
/// <param name="data"></param>
public void setTag(int id, int len, short type, byte [] data)
{
PropertyItem p = CreatePropertyItem(type,id,len,data);
this.bmp.SetPropertyItem( p );
buildDB(this.bmp.PropertyItems);
}
/// <summary>
///
/// </summary>
/// <param name="type"></param>
/// <param name="tag"></param>
/// <param name="len"></param>
/// <param name="value"></param>
/// <returns></returns>
private static PropertyItem CreatePropertyItem(short type, int tag, int len, byte[] value)
{
PropertyItem item;
// Loads a PropertyItem from a Jpeg image stored in the assembly as a resource.
Assembly assembly = Assembly.GetExecutingAssembly();
Stream emptyBitmapStream = assembly.GetManifestResourceStream("EXIFextractor.decoy.jpg");
System.Drawing.Image empty = System.Drawing.Image.FromStream(emptyBitmapStream);
item = empty.PropertyItems[0];
// Copies the data to the property item.
item.Type = type;
item.Len = len;
item.Id = tag;
item.Value = new byte[value.Length];
value.CopyTo(item.Value, 0);
return item;
}
/// <summary>
///
/// </summary>
/// <param name="bmp"></param>
/// <param name="sp"></param>
public EXIFextractor(ref System.Drawing.Bitmap bmp, string sp )
{
properties = new Hashtable();
//
this.bmp = bmp;
this.sp = sp;
//
myHash = new translation();
buildDB(this.bmp.PropertyItems);
}
string msp = "";
public EXIFextractor(ref System.Drawing.Bitmap bmp, string sp, string msp )
{
properties = new Hashtable();
this.sp = sp;
this.msp = msp;
this.bmp = bmp;
//
myHash = new translation();
this.buildDB(bmp.PropertyItems);
}
public static void CopyTo(Stream input, Stream outputStream)
{
byte[] btybuffer = new byte[16 * 1019]; // Fairly arbitrary size
int bytesRead;
while ((bytesRead = input.Read(btybuffer, 0, btybuffer.Length)) > 0)
{
outputStream.Write(btybuffer, 0, bytesRead);
}
}
public static PropertyItem[] GetExifProperties(string fileName)
{
MemoryStream ms = new MemoryStream();
using (FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
CopyTo(stream, ms);
}
System.Drawing.Image image = System.Drawing.Image.FromStream(ms,
/* useEmbeddedColorManagement = */ true,
/* validateImageData = */ false);
return image.PropertyItems;
}
public EXIFextractor(string file, string sp, string msp )
{
properties = new Hashtable();
this.sp = sp;
this.msp = msp;
myHash = new translation();
//
this.buildDB(GetExifProperties(file));
}
/// <summary>
///
/// </summary>
private void buildDB(System.Drawing.Imaging.PropertyItem[] parr)
{
properties.Clear();
//
data = "";
//
Encoding ascii = Encoding.ASCII;
//
foreach( System.Drawing.Imaging.PropertyItem p in parr )
{
string v = "";
string name = (string)myHash[p.Id];
// tag not found. skip it
if( name == null ) continue;
//
data += name+": ";
//
//1 = BYTE An 8-bit unsigned integer.,
if( p.Type == 0x1 )
{
v = p.Value[0].ToString();
}
//2 = ASCII An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL.,
else if( p.Type == 0x2 )
{
// string
v = ascii.GetString(p.Value);
}
//3 = SHORT A 16-bit (2 -byte) unsigned integer,
else if( p.Type == 0x3 )
{
// orientation // lookup table
switch( p.Id )
{
case 0x8827: // ISO
v = "ISO-" + convertToInt16U(p.Value).ToString();
break;
case 0xA217: // sensing method
{
switch( convertToInt16U(p.Value) )
{
case 1: v = "Not defined"; break;
case 2: v = "One-chip color area sensor"; break;
case 3: v = "Two-chip color area sensor"; break;
case 4: v = "Three-chip color area sensor"; break;
case 5: v = "Color sequential area sensor"; break;
case 7: v = "Trilinear sensor"; break;
case 8: v = "Color sequential linear sensor"; break;
default: v =" reserved"; break;
}
}
break;
case 0x8822: // aperture
switch( convertToInt16U(p.Value) )
{
case 0: v = "Not defined"; break;
case 1: v = "Manual"; break;
case 2: v = "Normal program"; break;
case 3: v = "Aperture priority"; break;
case 4: v = "Shutter priority"; break;
case 5: v = "Creative program (biased toward depth of field)"; break;
case 6: v = "Action program (biased toward fast shutter speed)"; break;
case 7: v = "Portrait mode (for closeup photos with the background out of focus)"; break;
case 8: v = "Landscape mode (for landscape photos with the background in focus)"; break;
default: v = "reserved"; break;
}
break;
case 0x9207: // metering mode
switch( convertToInt16U(p.Value) )
{
case 0: v = "unknown";break;
case 1: v = "Average";break;
case 2: v = "CenterWeightedAverage"; break;
case 3: v = "Spot"; break;
case 4: v = "MultiSpot"; break;
case 5: v = "Pattern"; break;
case 6: v = "Partial"; break;
case 255: v = "Other"; break;
default: v = "reserved"; break;
}
break;
case 0x9208: // light source
{
switch(convertToInt16U(p.Value) )
{
case 0:v = "unknown";break;
case 1:v = "Daylight";break;
case 2:v = "Fluorescent";break;
case 3:v = "Tungsten";break;
case 17:v = "Standard light A";break;
case 18:v = "Standard light B";break;
case 19:v = "Standard light C";break;
case 20:v = "D55";break;
case 21:v = "D65";break;
case 22:v = "D75";break;
case 255:v = "other";break;
default:v = "reserved";break;
}
}
break;
case 0x9209:
{
switch(convertToInt16U(p.Value) )
{
case 0: v = "Flash did not fire"; break;
case 1: v = "Flash fired"; break;
case 5: v = "Strobe return light not detected"; break;
case 7: v = "Strobe return light detected"; break;
default: v = "reserved"; break;
}
}
break;
default:
v = convertToInt16U(p.Value).ToString();
break;
}
}
//4 = LONG A 32-bit (4 -byte) unsigned integer,
else if( p.Type == 0x4 )
{
// orientation // lookup table
v = convertToInt32U(p.Value).ToString();
}
//5 = RATIONAL Two LONGs. The first LONG is the numerator and the second LONG expresses the//denominator.,
else if( p.Type == 0x5 )
{
//My code starts here
if (p.Id == 0x0004)
{
//lat
// rational
byte[] deg = new byte[4];
byte[] degdiv = new byte[4];
byte[] min = new byte[4];
byte[] mindiv = new byte[4];
byte[] sec = new byte[4];
byte[] secdiv = new byte[4];
Array.Copy(p.Value, 0, deg, 0, 4);
Array.Copy(p.Value, 4, degdiv, 0, 4);
Array.Copy(p.Value, 8, min, 0, 4);
Array.Copy(p.Value, 12, mindiv, 0, 4);
Array.Copy(p.Value, 16, sec, 0, 4);
Array.Copy(p.Value, 20, secdiv, 0, 4);
double _a = convertToInt32U(deg);
double _b = convertToInt32U(degdiv);
double _c = convertToInt32U(min);
double _d = convertToInt32U(mindiv);
double _e = convertToInt32U(sec);
double _f = convertToInt32U(secdiv);
double _o = ((_a / _b) + ((_c / _b) / 60) + ((_e / _f) / 3600));
v = _o.ToString();
// Rational r = new Rational(a, b);
}
else if (p.Id == 0x0002)
{
//long
byte[] deg = new byte[4];
byte[] degdiv = new byte[4];
byte[] min = new byte[4];
byte[] mindiv = new byte[4];
byte[] sec = new byte[4];
byte[] secdiv = new byte[4];
Array.Copy(p.Value, 0, deg, 0, 4);
Array.Copy(p.Value, 4, degdiv, 0, 4);
Array.Copy(p.Value, 8, min, 0, 4);
Array.Copy(p.Value, 12, mindiv, 0, 4);
Array.Copy(p.Value, 16, sec, 0, 4);
Array.Copy(p.Value, 20, secdiv, 0, 4);
double dblA = convertToInt32U(deg);
double dblB = convertToInt32U(degdiv);
double dblC = convertToInt32U(min);
double dblD = convertToInt32U(mindiv);
double dblE = convertToInt32U(sec);
double dblF = convertToInt32U(secdiv);
double o = ((dblA / dblB) + ((dblC/ dblB) / 60) + ((dblE/ dblF) / 3600));
v = o.ToString();
}
//My Code ends here
// rational
byte[]n = new byte[p.Len/2];
byte []d = new byte[p.Len/2];
Array.Copy(p.Value,0,n,0,p.Len/2);
Array.Copy(p.Value,p.Len/2,d,0,p.Len/2);
uint a = convertToInt32U(n);
uint b = convertToInt32U(d);
Rational r = new Rational(a,b);
//
//convert here
//
switch( p.Id )
{
case 0x9202: // aperture
v = "F/" + Math.Round(Math.Pow(Math.Sqrt(2),r.ToDouble()),2).ToString();
break;
case 0x920A:
v = r.ToDouble().ToString();
break;
case 0x829A:
v = r.ToDouble().ToString();
break;
case 0x829D: // F-number
v = "F/" + r.ToDouble().ToString();
break;
default:
v= r.ToString("/");
break;
}
}
//7 = UNDEFINED An 8-bit byte that can take any value depending on the field definition,
else if( p.Type == 0x7 )
{
switch (p.Id )
{
case 0xA300:
{
if( p.Value[0] == 3 )
{
v = "DSC";
}
else
{
v = "reserved";
}
break;
}
case 0xA301:
if( p.Value[0] == 1 )
v = "A directly photographed image";
else
v = "Not a directly photographed image";
break;
default:
v = "-";
break;
}
}
//9 = SLONG A 32-bit (4 -byte) signed integer (2's complement notation),
else if( p.Type == 0x9 )
{
v = convertToInt32(p.Value).ToString();
}
//10 = SRATIONAL Two SLONGs. The first SLONG is the numerator and the second SLONG is the
//denominator.
else if( p.Type == 0xA )
{
// rational
byte []n = new byte[p.Len/2];
byte []d = new byte[p.Len/2];
Array.Copy(p.Value,0,n,0,p.Len/2);
Array.Copy(p.Value,p.Len/2,d,0,p.Len/2);
int a = convertToInt32(n);
int b = convertToInt32(d);
Rational r = new Rational(a,b);
//
// convert here
//
switch( p.Id )
{
case 0x9201: // shutter speed
v = "1/" +Math.Round( Math.Pow(2,r.ToDouble()),2).ToString();
break;
case 0x9203:
v = Math.Round(r.ToDouble(),4).ToString();
break;
default:
v = r.ToString("/");
break;
}
}
// add it to the list
if( properties[name] == null )
properties.Add(name,v);
// cat it too
data+= v;
data+= this.sp;
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public override string ToString()
{
return data;
}
/// <summary>
///
/// </summary>
/// <param name="arr"></param>
/// <returns></returns>
int convertToInt32(byte [] arr)
{
if(arr.Length != 4 )
return 0;
else
return arr[3] << 24 | arr[2] << 16 | arr[1] << 8 | arr[0];
}
/// <summary>
///
/// </summary>
/// <param name="arr"></param>
/// <returns></returns>
int convertToInt16(byte [] arr)
{
if(arr.Length != 2 )
return 0;
else
return arr[1] << 8 | arr[0];
}
/// <summary>
///
/// </summary>
/// <param name="arr"></param>
/// <returns></returns>
uint convertToInt32U(byte [] arr)
{
if(arr.Length != 4 )
return 0;
else
return Convert.ToUInt32(arr[3] << 24 | arr[2] << 16 | arr[1] << 8 | arr[0]);
}
/// <summary>
///
/// </summary>
/// <param name="arr"></param>
/// <returns></returns>
uint convertToInt16U(byte [] arr)
{
if(arr.Length != 2 )
return 0;
else
return Convert.ToUInt16(arr[1] << 8 | arr[0]);
}
#region IEnumerable Members
public IEnumerator GetEnumerator()
{
// TODO: Add EXIFextractor.GetEnumerator implementation
return( new EXIFextractorEnumerator( this.properties ));
}
#endregion
}
//
// dont touch this class. its for IEnumerator
//
//
class EXIFextractorEnumerator : IEnumerator
{
Hashtable exifTable;
IDictionaryEnumerator index;
internal EXIFextractorEnumerator( Hashtable exif )
{
this.exifTable = exif;
this.Reset();
index = exif.GetEnumerator();
}
#region IEnumerator Members
public void Reset()
{
this.index = null;
}
public object Current
{
get
{
return ( new System.Web.UI.Pair(this.index.Key,this.index.Value) );
}
}
public bool MoveNext()
{
if( index != null && index.MoveNext() )
return true;
else
return false;
}
#endregion
}
}
А вот код для моего класса перевода.
using System;
using System.Collections;
namespace EXIF
{
/// <summary>
/// Summary description for translation.
/// </summary>
public class translation : Hashtable
{
/// <summary>
///
/// </summary>
public translation()
{
this.Add(0x8769,"Exif IFD");
this.Add(0x8825,"Gps IFD");
this.Add(0xFE,"New Subfile Type");
this.Add(0xFF,"Subfile Type");
this.Add(0x100,"Image Width");
this.Add(0x101,"Image Height");
this.Add(0x102,"Bits Per Sample");
this.Add(0x103,"Compression");
this.Add(0x106,"Photometric Interp");
this.Add(0x107,"Thresh Holding");
this.Add(0x108,"Cell Width");
this.Add(0x109,"Cell Height");
this.Add(0x10A,"Fill Order");
this.Add(0x10D,"Document Name");
this.Add(0x10E,"Image Description");
this.Add(0x10F,"Equip Make");
this.Add(0x110,"Equip Model");
this.Add(0x111,"Strip Offsets");
this.Add(0x112,"Orientation");
this.Add(0x115,"Samples PerPixel");
this.Add(0x116,"Rows Per Strip");
this.Add(0x117,"Strip Bytes Count");
this.Add(0x118,"Min Sample Value");
this.Add(0x119,"Max Sample Value");
this.Add(0x11A,"X Resolution");
this.Add(0x11B,"Y Resolution");
this.Add(0x11C,"Planar Config");
this.Add(0x11D,"Page Name");
this.Add(0x11E,"X Position");
this.Add(0x11F,"Y Position");
this.Add(0x120,"Free Offset");
this.Add(0x121,"Free Byte Counts");
this.Add(0x122,"Gray Response Unit");
this.Add(0x123,"Gray Response Curve");
this.Add(0x124,"T4 Option");
this.Add(0x125,"T6 Option");
this.Add(0x128,"Resolution Unit");
this.Add(0x129,"Page Number");
this.Add(0x12D,"Transfer Funcition");
this.Add(0x131,"Software Used");
this.Add(0x132,"Date Time");
this.Add(0x13B,"Artist");
this.Add(0x13C,"Host Computer");
this.Add(0x13D,"Predictor");
this.Add(0x13E,"White Point");
this.Add(0x13F,"Primary Chromaticities");
this.Add(0x140,"ColorMap");
this.Add(0x141,"Halftone Hints");
this.Add(0x142,"Tile Width");
this.Add(0x143,"Tile Length");
this.Add(0x144,"Tile Offset");
this.Add(0x145,"Tile ByteCounts");
this.Add(0x14C,"InkSet");
this.Add(0x14D,"Ink Names");
this.Add(0x14E,"Number Of Inks");
this.Add(0x150,"Dot Range");
this.Add(0x151,"Target Printer");
this.Add(0x152,"Extra Samples");
this.Add(0x153,"Sample Format");
this.Add(0x154,"S Min Sample Value");
this.Add(0x155,"S Max Sample Value");
this.Add(0x156,"Transfer Range");
this.Add(0x200,"JPEG Proc");
this.Add(0x201,"JPEG InterFormat");
this.Add(0x202,"JPEG InterLength");
this.Add(0x203,"JPEG RestartInterval");
this.Add(0x205,"JPEG LosslessPredictors");
this.Add(0x206,"JPEG PointTransforms");
this.Add(0x207,"JPEG QTables");
this.Add(0x208,"JPEG DCTables");
this.Add(0x209,"JPEG ACTables");
this.Add(0x211,"YCbCr Coefficients");
this.Add(0x212,"YCbCr Subsampling");
this.Add(0x213,"YCbCr Positioning");
this.Add(0x214,"REF Black White");
this.Add(0x8773,"ICC Profile");
this.Add(0x301,"Gamma");
this.Add(0x302,"ICC Profile Descriptor");
this.Add(0x303,"SRGB RenderingIntent");
this.Add(0x320,"Image Title");
this.Add(0x8298,"Copyright");
this.Add(0x5001,"Resolution X Unit");
this.Add(0x5002,"Resolution Y Unit");
this.Add(0x5003,"Resolution X LengthUnit");
this.Add(0x5004,"Resolution Y LengthUnit");
this.Add(0x5005,"Print Flags");
this.Add(0x5006,"Print Flags Version");
this.Add(0x5007,"Print Flags Crop");
this.Add(0x5008,"Print Flags Bleed Width");
this.Add(0x5009,"Print Flags Bleed Width Scale");
this.Add(0x500A,"Halftone LPI");
this.Add(0x500B,"Halftone LPIUnit");
this.Add(0x500C,"Halftone Degree");
this.Add(0x500D,"Halftone Shape");
this.Add(0x500E,"Halftone Misc");
this.Add(0x500F,"Halftone Screen");
this.Add(0x5010,"JPEG Quality");
this.Add(0x5011,"Grid Size");
this.Add(0x5012,"Thumbnail Format");
this.Add(0x5013,"Thumbnail Width");
this.Add(0x5014,"Thumbnail Height");
this.Add(0x5015,"Thumbnail ColorDepth");
this.Add(0x5016,"Thumbnail Planes");
this.Add(0x5017,"Thumbnail RawBytes");
this.Add(0x5018,"Thumbnail Size");
this.Add(0x5019,"Thumbnail CompressedSize");
this.Add(0x501A,"Color Transfer Function");
this.Add(0x501B,"Thumbnail Data");
this.Add(0x5020,"Thumbnail ImageWidth");
this.Add(0x502,"Thumbnail ImageHeight");
this.Add(0x5022,"Thumbnail BitsPerSample");
this.Add(0x5023,"Thumbnail Compression");
this.Add(0x5024,"Thumbnail PhotometricInterp");
this.Add(0x5025,"Thumbnail ImageDescription");
this.Add(0x5026,"Thumbnail EquipMake");
this.Add(0x5027,"Thumbnail EquipModel");
this.Add(0x5028,"Thumbnail StripOffsets");
this.Add(0x5029,"Thumbnail Orientation");
this.Add(0x502A,"Thumbnail SamplesPerPixel");
this.Add(0x502B,"Thumbnail RowsPerStrip");
this.Add(0x502C,"Thumbnail StripBytesCount");
this.Add(0x502D,"Thumbnail ResolutionX");
this.Add(0x502E,"Thumbnail ResolutionY");
this.Add(0x502F,"Thumbnail PlanarConfig");
this.Add(0x5030,"Thumbnail ResolutionUnit");
this.Add(0x5031,"Thumbnail TransferFunction");
this.Add(0x5032,"Thumbnail SoftwareUsed");
this.Add(0x5033,"Thumbnail DateTime");
this.Add(0x5034,"Thumbnail Artist");
this.Add(0x5035,"Thumbnail WhitePoint");
this.Add(0x5036,"Thumbnail PrimaryChromaticities");
this.Add(0x5037,"Thumbnail YCbCrCoefficients");
this.Add(0x5038,"Thumbnail YCbCrSubsampling");
this.Add(0x5039,"Thumbnail YCbCrPositioning");
this.Add(0x503A,"Thumbnail RefBlackWhite");
this.Add(0x503B,"Thumbnail CopyRight");
this.Add(0x5090,"Luminance Table");
this.Add(0x5091,"Chrominance Table");
this.Add(0x5100,"Frame Delay");
this.Add(0x5101,"Loop Count");
this.Add(0x5110,"Pixel Unit");
this.Add(0x5111,"Pixel PerUnit X");
this.Add(0x5112,"Pixel PerUnit Y");
this.Add(0x5113,"Palette Histogram");
this.Add(0x829A,"Exposure Time");
this.Add(0x829D,"F-Number");
this.Add(0x8822,"Exposure Prog");
this.Add(0x8824,"Spectral Sense");
this.Add(0x8827,"ISO Speed");
this.Add(0x8828,"OECF");
this.Add(0x9000,"Ver");
this.Add(0x9003,"DTOrig");
this.Add(0x9004,"DTDigitized");
this.Add(0x9101,"CompConfig");
this.Add(0x9102,"CompBPP");
this.Add(0x9201,"Shutter Speed");
this.Add(0x9202,"Aperture");
this.Add(0x9203,"Brightness");
this.Add(0x9204,"Exposure Bias");
this.Add(0x9205,"MaxAperture");
this.Add(0x9206,"SubjectDist");
this.Add(0x9207,"Metering Mode");
this.Add(0x9208,"LightSource");
this.Add(0x9209,"Flash");
this.Add(0x920A,"FocalLength");
this.Add(0x927C,"Maker Note");
this.Add(0x9286,"User Comment");
this.Add(0x9290,"DTSubsec");
this.Add(0x9291,"DTOrigSS");
this.Add(0x9292,"DTDigSS");
this.Add(0xA000,"FPXVer");
this.Add(0xA001,"ColorSpace");
this.Add(0xA002,"PixXDim");
this.Add(0xA003,"PixYDim");
this.Add(0xA004,"RelatedWav");
this.Add(0xA005,"Interop");
this.Add(0xA20B,"FlashEnergy");
this.Add(0xA20C,"SpatialFR");
this.Add(0xA20E,"FocalXRes");
this.Add(0xA20F,"FocalYRes");
this.Add(0xA210,"FocalResUnit");
this.Add(0xA214,"Subject Loc");
this.Add(0xA215,"Exposure Index");
this.Add(0xA217,"Sensing Method");
this.Add(0xA300,"FileSource");
this.Add(0xA301,"SceneType");
this.Add(0xA302,"CfaPattern");
this.Add(0x0,"Gps Ver");
this.Add(0x1,"Gps LatitudeRef");
this.Add(0x2,"Gps Latitude");
this.Add(0x3,"Gps LongitudeRef");
this.Add(0x4,"Gps Longitude");
this.Add(0x5,"Gps AltitudeRef");
this.Add(0x6,"Gps Altitude");
this.Add(0x7,"Gps GpsTime");
this.Add(0x8,"Gps GpsSatellites");
this.Add(0x9,"Gps GpsStatus");
this.Add(0xA,"Gps GpsMeasureMode");
this.Add(0xB,"Gps GpsDop");
this.Add(0xC,"Gps SpeedRef");
this.Add(0xD,"Gps Speed");
this.Add(0xE,"Gps TrackRef");
this.Add(0xF,"Gps Track");
this.Add(0x10,"Gps ImgDirRef");
this.Add(0x11,"Gps ImgDir");
this.Add(0x12,"Gps MapDatum");
this.Add(0x13,"Gps DestLatRef");
this.Add(0x14,"Gps DestLat");
this.Add(0x15,"Gps DestLongRef");
this.Add(0x16,"Gps DestLong");
this.Add(0x17,"Gps DestBearRef");
this.Add(0x18,"Gps DestBear");
this.Add(0x19,"Gps DestDistRef");
this.Add(0x1A,"Gps DestDist");
}
}
/// <summary>
/// private class
/// </summary>
internal class Rational
{
private int n;
private int d;
public Rational(int n, int d)
{
this.n = n;
this.d = d;
simplify(ref this.n, ref this.d);
}
public Rational(uint n, uint d)
{
this.n = Convert.ToInt32(n);
this.d = Convert.ToInt32(d);
simplify(ref this.n, ref this.d);
}
public Rational()
{
this.n= this.d=0;
}
public string ToString(string sp)
{
if( sp == null ) sp = "/";
return n.ToString() + sp + d.ToString();
}
public double ToDouble()
{
if( d == 0 )
return 0.0;
return Math.Round(Convert.ToDouble(n)/Convert.ToDouble(d),2);
}
private void simplify( ref int a, ref int b )
{
if( a== 0 || b == 0 )
return;
int gcd = euclid(a,b);
a /= gcd;
b /= gcd;
}
private int euclid(int a, int b)
{
if(b==0)
return a;
else
return euclid(b,a%b);
}
}
}
Что я уже пробовал:
Я уже смотрел класс PropertyItem в msdn, но не знаю, с чего начать его реализацию для этой программы.
Что-то подсказывает мне, что я должен настроить оператор if else для тега в EXIFextractor.BuildDB(). Но, увы, математика не является моей сильной стороной. Как бы мне реализовать эту логику, пожалуйста?
Richard MacCutchan
Сообщение об ошибке совершенно ясно, ваш bmp переменная никогда не была установлена в допустимую ссылку на объект. Но где во всем этом коде возникает ошибка, не ясно.
Jordan Nash
Ах, да, я понимаю, что у меня была перегрузка метода точного метода, где была ошибка. Это здесь, в Эксифэкстракторе.
public void setTag(int id, int len, short type, byte [] data)
{
PropertyItem p = CreatePropertyItem(тип,идентификатор,len,данные);
this.bmp.SetPropertyItem( p );//ошибка в этой строке.
buildDB(this.bmp.PropertyItems);
}
Richard MacCutchan
Поэтому вам нужно выяснить, почему bmp не установлен в допустимую ссылку.
Jordan Nash
Я изменил метод loadImageMetaData() на этот. Метод setTag (), конечно, ожидал растрового изображения, поэтому я создал его экземпляр.
частный недействительными loadImageMetaData()
{
lstImageMetaData.Предметы.Четкий();
Bitmap bmp = новое растровое изображение(_big_fileName);
ЭКСИФ.EXIFextractor er2 = новый EXIF.EXIFextractor(ref bmp, "\n");
foreach (пара s в er2)
{
lstImageMetaData.Предметы.Добавить(s.First + " : "+ s.Second);
}
lstImageMetaData.Свойства selectedIndex = lstImageMetaData.Предметы.Количество - 1;
er2.setTag(0x5013,"ширина миниатюры");
}
Итак, я больше не получаю ошибку, но она по-прежнему не будет отображать метаданные “ширина миниатюры”. Вы знаете, что я делаю не так, пожалуйста?
Richard MacCutchan
Эта библиотека была написана членом CodeProject, поэтому вам нужно разместить свой вопрос на форуме в конце статьи.
Jordan Nash
Я уже сделал это 3 дня назад. Никто не ответил. Возможно, мне нужно больше терпения. Я поставлю свой предыдущий комментарий отсюда на тот вопрос, который я уже разместил на этом форуме.
Richard MacCutchan
Проблема в том, что человек, написавший эту статью, - единственный, кто действительно поймет, как она работает. Так что, спрашивая здесь, вы вряд ли получите ответ.