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static string ByteToString(byte[] b, int startindex)
{
if (startindex + 1 <= b.Length)
return ((char)b[startindex]).ToString();
else
return string.Empty;
}
static string ShortToString(byte[] b, int startindex)
{
if (startindex + 2 <= b.Length)
return BitConverter.ToInt16(b, startindex).ToString();
else
return string.Empty;
}
static string RationalToSingle(byte[] b, int startindex)
{
if (startindex + 8 <= b.Length)
return (BitConverter.ToSingle(b, startindex) / BitConverter.ToSingle(b, startindex + 4)).ToString();
else
return string.Empty;
}
static string ASCIIToString(byte[] b)
{
return Encoding.ASCII.GetString(b);
}
这在网上很容易搜到。由于网上的基本上都不是原创而是互相抄了很多遍的,找不到真正的原创的地址,我就不贴出其地址了。private static Dictionary<string, string> ReadExif(Image image)
{
var exif = new Dictionary<string, string>();
var properties = image.PropertyItems;
foreach (var property in properties)
{
switch (property.Id)
{
case 0x010E:
exif["ImageTitle"] = ASCIIToString(property.Value);
break;
case 0x010F:
exif["Make"] = ASCIIToString(property.Value);
break;
case 0x0110:
exif["Model"] = ASCIIToString(property.Value);
break;
case 0x0112:
exif["Orientation"] = ShortToString(property.Value, 0);
break;
case 0x011A:
exif["XResolution"] = RationalToSingle(property.Value, 0);
break;
case 0x011B:
exif["YResolution"] = RationalToSingle(property.Value, 0);
break;
case 0x0128:
exif["ResolutionUnit"] = ShortToString(property.Value, 0);
break;
case 0x0131:
exif["Software"] = ASCIIToString(property.Value);
break;
case 0x0132:
exif["DateTime"] = ASCIIToString(property.Value);
break;
//GPS
case 0x0002:
exif["GPSLatitude"] = string.Format("{0}°{1}′{2}″",
RationalToSingle(property.Value, 0),
RationalToSingle(property.Value, 8),
RationalToSingle(property.Value, 16)
);
break;
case 0x0004:
exif["GPSLongitude"] = string.Format("{0}°{1}′{2}″",
RationalToSingle(property.Value, 0),
RationalToSingle(property.Value, 8),
RationalToSingle(property.Value, 16)
);
break;
case 0x0006:
exif["GPSAltitude"] = RationalToSingle(property.Value, 0);
break;
}
}
return exif;
}