function DecodeDate(const Value: string; out DateTime: TDateTime; out DateTimeOffset: Integer): Boolean;
| Value | string. PDF date string in the PDF date format: D:YYYYMMDDHHmmSSOHH'mm' (e.g. "D:20240515120000+08'00'"). |
| DateTime | TDateTime. Output parameter that receives the decoded date and time value. |
| DateTimeOffset | Integer. Output parameter that receives the UTC offset in minutes. Positive values indicate east of UTC; negative values indicate west. |
True nếu Value được phân tích thành công thành một chuỗi ngày PDF hợp lệ. Trả về False nếu chuỗi rỗng, bị lỗi định dạng, hoặc không tuân theo định dạng ngày PDFDecodeDate is a unit-level global function in the PDFium unit. It parses a PDF date string and converts it to a Delphi TDateTime value together with the UTC timezone offset in minutes.
PDF documents store dates in the format D:YYYYMMDDHHmmSSOHH'mm', where O is the relationship to UTC (+, -, or Z). Use this function to decode the raw strings returned by properties such as CreationDate and ModifiedDate.
The DateTimeOffset out parameter contains the signed UTC offset in minutes (for example, UTC+8 gives 480, UTC-5 gives -300). The DateTime out parameter is set to the local time as encoded in the PDF string, not adjusted to UTC.
var
DT: TDateTime;
Offset: Integer;
begin
if DecodeDate(Pdf.CreationDate, DT, Offset) then
begin
ShowMessage('Created: ' + DateTimeToStr(DT));
ShowMessage('UTC offset (minutes): ' + IntToStr(Offset));
end;
end;