PdfGetSubject Method (GdViewer)
Returns the subject of the currently displayed PDF document, if any is set in the document information dictionary.
If the document currently displayed in the GdViewer control is not the PDF file, the method will fail.
public string PdfGetSubject()
public function PdfGetSubject(): String;
public function PdfGetSubject() : String;
public: string* PdfGetSubject();
public:
String^ PdfGetSubject();
'Declaration
Public Function PdfGetSubject() As String
Return Value
The value of the document's Subject property as a string. The
GdViewer.GetStat method can be subsequently used to determine if this method has been successful.
How to get the subject of the displayed PDF document.
'We assume that the GdViewer1 control has been properly integrated.
If GdViewer1.DisplayFromFile("") = GdPictureStatus.OK Then
Dim message As String = "The current file is: " + GdViewer1.GetLastPath()
If GdViewer1.GetDocumentType() = DocumentType.DocumentTypePDF Then
message += vbCrLf + "Author: " + GdViewer1.PdfGetAuthor() +
vbCrLf + "Title: " + GdViewer1.PdfGetTitle() +
vbCrLf + "Subject: " + GdViewer1.PdfGetSubject() +
vbCrLf + "PDF Version: " + GdViewer1.PdfGetVersion()
Else
message += vbCrLf + "This file is not a PDF document, its format is: " + GdViewer1.GetDocumentType().ToString()
End If
MessageBox.Show(message, "GdViewer.PdfGetSubject")
Else
MessageBox.Show("The file can't be loaded. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PdfGetSubject")
End If
//We assume that the GdViewer1 control has been properly integrated.
if (GdViewer1.DisplayFromFile("") == GdPictureStatus.OK)
{
string message = "The current file is: " + GdViewer1.GetLastPath();
if (GdViewer1.GetDocumentType() == DocumentType.DocumentTypePDF)
{
message += "\nAuthor: " + GdViewer1.PdfGetAuthor() +
"\nTitle: " + GdViewer1.PdfGetTitle() +
"\nSubject: " + GdViewer1.PdfGetSubject() +
"\nPDF Version: " + GdViewer1.PdfGetVersion();
}
else
{
message += "\nThis file is not a PDF document, its format is: " + GdViewer1.GetDocumentType().ToString();
}
MessageBox.Show(message, "GdViewer.PdfGetSubject");
}
else
MessageBox.Show("The file can't be loaded. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PdfGetSubject");
