手机拍的照片在手机里看角度一般是正常，上传到电脑后就是旋转90度的了，代码中怎么样读取EXIF信息来判断，C#试了一下Image.PropertyItems，里面可以访问到的参数好少，不象Java等其它的可以那么多直接指定方向旋转信息 … 求指导！
解决方案
20
http://www.codeproject.com/Articles/27242/ExifTagCollection-An-EXIF-metadata-extraction-libr
80
你可以这样读取
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;
}
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