Example





In This Topic
GdPicture14 Namespace / GdViewer Class / PdfGetPageWidth Method

PdfGetPageWidth Method (GdViewer)

In This Topic
Returns the page width in PDF point units of the currently selected page in the displayed PDF document. If the document currently displayed in the GdViewer control is not the PDF file, the method will fail.
Syntax
'Declaration

 


Public Function PdfGetPageWidth() As Double
public double PdfGetPageWidth()
public function PdfGetPageWidth(): Double; 
public function PdfGetPageWidth() : double;
public: double PdfGetPageWidth(); 
public:

double PdfGetPageWidth();

Return Value

The page height in points. The GetStat method can be subsequently used to determine if this method has been successful.
Remarks
This method is only meaningful for PDF documents, otherwise it returns 0. It is recommend to use the GetStat method to identify the specific reason for the method's failure, if any.

Just to inform you that 1 point = 1/72 inch. For example, to get the current page width in inches, use Width = PdfGetPageWidth() / 72, similarly to get the page width in centimeters, use Width = PdfGetPageWidth() / 72 * 2.54.

Example
How to retrieve the page height of the currently displayed page of the loaded 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 + "Number of pages: " + GdViewer1.PageCount.ToString() +

                   vbCrLf + "Page height: " + (GdViewer1.PdfGetPageHeight()) / 72 * 2.54 + " cm" +

                   vbCrLf + "Page width: " + (GdViewer1.PdfGetPageWidth()) / 72 * 2.54 + " cm"

    Else

        message += vbCrLf + "This file is not a PDF document, its format is: " + GdViewer1.GetDocumentType().ToString()

    End If

            

    MessageBox.Show(message, "GdViewer.PdfGetPageHeight")

Else

    MessageBox.Show("The file can't be loaded. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PdfGetPageWidth")

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 += "\nNumber of pages: " + GdViewer1.PageCount.ToString() +

                   "\nPage height: " + (GdViewer1.PdfGetPageHeight())/72*2.54 +

                   " cm\nPage width: " + (GdViewer1.PdfGetPageWidth())/72*2.54 + " cm";

    }

    else

    {

        message += "\nThis file is not a PDF document, its format is: " + GdViewer1.GetDocumentType().ToString();

    }

    MessageBox.Show(message, "GdViewer.PdfGetPageWidth");

}

else

    MessageBox.Show("The file can't be loaded. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PdfGetPageWidth");
Example
How to retrieve the page height of the currently displayed page of the loaded 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 + "Number of pages: " + GdViewer1.PageCount.ToString() + vbCrLf + "Page height: " + (GdViewer1.PdfGetPageHeight()) / 72 * 2.54 + " cm" + vbCrLf + "Page width: " + (GdViewer1.PdfGetPageWidth()) / 72 * 2.54 + " cm" Else message += vbCrLf + "This file is not a PDF document, its format is: " + GdViewer1.GetDocumentType().ToString() End If MessageBox.Show(message, "GdViewer.PdfGetPageHeight") Else MessageBox.Show("The file can't be loaded. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PdfGetPageWidth") 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 += "\nNumber of pages: " + GdViewer1.PageCount.ToString() + "\nPage height: " + (GdViewer1.PdfGetPageHeight())/72*2.54 + " cm\nPage width: " + (GdViewer1.PdfGetPageWidth())/72*2.54 + " cm"; } else { message += "\nThis file is not a PDF document, its format is: " + GdViewer1.GetDocumentType().ToString(); } MessageBox.Show(message, "GdViewer.PdfGetPageWidth"); } else MessageBox.Show("The file can't be loaded. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PdfGetPageWidth");
See Also

Reference

GdViewer Class
GdViewer Members
GetStat Method
GetStat Method
PdfGetPageHeight Method
GetLastPath Method
GetDocumentType Method