private void button1_Click(object sender, EventArgs e)
{
//Create a pdf document
PdfDocument doc = new PdfDocument();
//Load an existing pdf from disk
doc.LoadFromFile(@"..\..\..\..\..\..\Data\GetPageInfo.pdf");
//Get the first page of the loaded PDF file
PdfPageBase page = doc.Pages[0];
//Get the size of page MediaBox based on "point"
float MediaBoxWidth = page.MediaBox.Width;
float MediaBoxHeight = page.MediaBox.Height;
float MediaBoxX = page.MediaBox.X;
float MediaBoxY = page.MediaBox.Y;
//Get the size of page BleedBox based on "point"
float BleedBoxWidth = page.BleedBox.Width;
float BleedBoxHeight = page.BleedBox.Height;
float BleedBoxX = page.BleedBox.X;
float BleedBoxY = page.BleedBox.Y;
//Get the size of page CropBox based on "point"
float CropBoxWidth = page.CropBox.Width;
float CropBoxHeight = page.CropBox.Height;
float CropBoxX = page.CropBox.X;
float CropBoxY = page.CropBox.Y;
//Get the size of page ArtBox based on "point"
float ArtBoxWidth = page.ArtBox.Width;
float ArtBoxHeight = page.ArtBox.Height;
float ArtBoxX = page.ArtBox.X;
float ArtBoxY = page.ArtBox.Y;
//Get the size of page TrimBox based on "point"
float TrimBoxWidth = page.TrimBox.Width;
float TrimBoxHeight = page.TrimBox.Height;
float TrimBoxX = page.TrimBox.X;
float TrimBoxY = page.TrimBox.Y;
//Get the actual size of page
float actualSizeW = page.ActualSize.Width;
float actualSizeH = page.ActualSize.Height;
//Gets the rotation angle of the current page
PdfPageRotateAngle rotationAngle = page.Rotation;
string rotation = rotationAngle.ToString();
//Create StringBuilder to save
StringBuilder content = new StringBuilder();
//Add page information string to StringBuilder
content.AppendLine("MediaBox width: " + MediaBoxWidth + "pt, height: " + MediaBoxHeight + "pt, RectangleF X: " + MediaBoxX + "pt, RectangleF Y: " + MediaBoxY + "pt.");
content.AppendLine("BleedBox width: " + BleedBoxWidth + "pt, height: " + BleedBoxHeight + "pt, RectangleF X: " + BleedBoxX + "pt, RectangleF Y: " + BleedBoxY + "pt.");
content.AppendLine("CropBox width: " + CropBoxWidth + "pt, height: " + CropBoxHeight + "pt, RectangleF X: " + CropBoxX + "pt, RectangleF Y: " + CropBoxY + "pt.");
content.AppendLine("ArtBox width: " + ArtBoxWidth + "pt, height: " + ArtBoxHeight + "pt, RectangleF X: " + ArtBoxX + "pt, RectangleF Y: " + ArtBoxY + "pt.");
content.AppendLine("TrimBox width: " + TrimBoxWidth + "pt, height: " + TrimBoxHeight + "pt, RectangleF X: " + TrimBoxX + "pt, RectangleF Y: " + TrimBoxY + "pt.");
content.AppendLine("The actual size of the current page width: " + actualSizeW);
content.AppendLine("The actual size of the current page height: " + actualSizeH);
content.AppendLine("The rotation angle of the current page: " + rotation);
String result = "PageInfo.txt";
//Save them to a txt file
File.WriteAllText(result, content.ToString());
//Launch the file
DocumentViewer(result);
}
private int GetZoom(string fileName)
{
Spire.Pdf.PdfDocument pdf = new Spire.Pdf.PdfDocument(fileName);
PdfPageRotateAngle rotation = pdf.Pages[0].Rotation;
double pdfPageSizeYPoint;
double pdfPageSizeXPoint;
switch (rotation)
{
case PdfPageRotateAngle.RotateAngle0:
pdfPageSizeYPoint = pdf.Pages[0].Size.Height;
pdfPageSizeXPoint = pdf.Pages[0].Size.Width;
break;
case PdfPageRotateAngle.RotateAngle90:
pdfPageSizeYPoint = pdf.Pages[0].Size.Width;
pdfPageSizeXPoint = pdf.Pages[0].Size.Height;
break;
case PdfPageRotateAngle.RotateAngle180:
pdfPageSizeYPoint = pdf.Pages[0].Size.Height;
pdfPageSizeXPoint = pdf.Pages[0].Size.Width;
break;
case PdfPageRotateAngle.RotateAngle270:
pdfPageSizeYPoint = pdf.Pages[0].Size.Width;
pdfPageSizeXPoint = pdf.Pages[0].Size.Height;
break;
default:
throw new ArgumentOutOfRangeException();
}
pdf.Close();
float dpiX;
float dpiY;
using (Graphics graphics = Graphics.FromHwnd(IntPtr.Zero))
{
dpiX = graphics.DpiX;
dpiY = graphics.DpiY;
}
double pdfPageSizeXPix = pdfPageSizeXPoint * dpiX / 72;
double pdfPageSizeYPix = pdfPageSizeYPoint * dpiY / 72;
int pdfViewerSizeYPix = pdfDocumentViewer.Height;
int pdfViewerSizeXPix = pdfDocumentViewer.Width;
double scaleX = pdfViewerSizeXPix / pdfPageSizeXPix * 100 - 0.5;
double scaleY = pdfViewerSizeYPix / pdfPageSizeYPix * 100 - 0.5;
return(scaleX < scaleY ? (int)scaleX : (int)scaleY);
}
