public static DateTime?GetMetaTextAsDate(IntPtr document, string tag)
{
string dt = CallNative.GetMetaText(document, tag);
DateTime parseDate;
if (string.IsNullOrEmpty(dt))
{
return(null);
}
Regex dtRegex =
new Regex(
@"(?:D:)(?<year>\d\d\d\d)(?<month>\d\d)(?<day>\d\d)(?<hour>\d\d)(?<minute>\d\d)(?<second>\d\d)(?<tz_offset>[+-zZ])?(?<tz_hour>\d\d)?'?(?<tz_minute>\d\d)?'?");
Match match = dtRegex.Match(dt);
if (match.Success)
{
var year = match.Groups["year"].Value;
var month = match.Groups["month"].Value;
var day = match.Groups["day"].Value;
var hour = match.Groups["hour"].Value;
var minute = match.Groups["minute"].Value;
var second = match.Groups["second"].Value;
var tzOffset = match.Groups["tz_offset"]?.Value;
var tzHour = match.Groups["tz_hour"]?.Value;
var tzMinute = match.Groups["tz_minute"]?.Value;
string formattedDate = $"{year}-{month}-{day}T{hour}:{minute}:{second}.0000000";
if (!string.IsNullOrEmpty(tzOffset))
{
switch (tzOffset)
{
case "Z":
case "z":
formattedDate += "+0";
break;
case "+":
case "-":
formattedDate += $"{tzOffset}{tzHour}:{tzMinute}";
break;
}
}
if (!DateTime.TryParse(formattedDate, out parseDate))
{
throw new FormatException();
}
return(parseDate);
}
return(null);
}
public PdfInformation GetInformation()
{
var pdfInfo = new PdfInformation();
pdfInfo.Creator = CallNative.GetMetaText(_doc, "Creator");
pdfInfo.Title = CallNative.GetMetaText(_doc, "Title");
pdfInfo.Author = CallNative.GetMetaText(_doc, "Author");
pdfInfo.Subject = CallNative.GetMetaText(_doc, "Subject");
pdfInfo.Keywords = CallNative.GetMetaText(_doc, "Keywords");
pdfInfo.Producer = CallNative.GetMetaText(_doc, "Producer");
pdfInfo.CreationDate = CallNative.GetMetaTextAsDate(_doc, "CreationDate");
pdfInfo.ModificationDate = CallNative.GetMetaTextAsDate(_doc, "ModDate");
return(pdfInfo);
}