convert .pdf file to thumbnail view

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how to convert .pdf file to thumbnail view in asp.net with c#

Posted 19-Jul-12 22:48pm

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Nattudurai.E · Answer 1 · 2012-07-19T22:59:00

private void generatePNGfromPDF(PdfDecoder decoder, int PageNumber, double width, double height, String formname){
//int size = 100;
try
{
//decoder.decodePage(PageNumber);
//decoder.setPageParameters(1,PageNumber); //values scaling (1=100%). page number
decoder.useHiResScreenDisplay(true);

// the below line sets the multiple of 72 dpi ie: 72 * 4.166 = 300dpi
decoder.setExtractionMode(32, 72, 4.166f);
BufferedImage PDF = decoder.getPageAsImage(PageNumber);
//width = PDF.getWidth() * .75;
//height = PDF.getHeight() * .75;
width = PDF.getWidth();
height = PDF.getHeight();

GraphicsConfiguration gc = getDefaultConfiguration();
final BufferedImage PNG = getScaledInstance(PDF, (int)Math.round(width), (int)Math.round(height), gc);
String fileName = jTextAreaTargetDirectoryPath.getText() + "\\" + formname + "-" + PageNumber + ".png";
ImageIO.write(PNG, "png", new File( fileName ));
decoder.flushObjectValues(true);
}
catch(Exception ex){
ex.printStackTrace();
//flogger.log(Level.SEVERE, "Cannot generate image from page.", ex);
}

}

Nattudurai.E · Answer 2 · 2012-07-19T23:03:00

Solution 4

Plz click the below link to see the exapmle

http://amitpatriwala.wordpress.com/2009/08/28/pdf-viewer-in-asp-net/[^]

Posted 19-Jul-12 23:03pm

Nattudurai.E

Nattudurai.E · Answer 3 · 2012-07-19T23:00:00

The GFL SDK/GFLAx (http://www.xnview.com/en/gfl.html) free library component can be used to convert PDF to image format. It works for ASP, VB, C# etc. GhostScript (http://sourceforge.net/projects/ghostscript/) is required for it to work.

Example code in C#:

{
string file = "D:/test.pdf";
string image = "D:\\test.png";

try
{
GflAx.GflAxClass g = new GflAx.GflAxClass();
g.EpsDpi = 150;
g.Page = 1;
g.LoadBitmap(file);
g.SaveFormat = GflAx.AX_SaveFormats.AX_PNG;
g.SaveBitmap(image);
MessageBox.Show(this, "PDF to PNG conversion ended");
}
catch (Exception ex) {
MessageBox.Show(this, "GflAx error: " + ex.Message);
}
}

Nattudurai.E · Answer 4 · 2012-07-19T23:01:00

Sample code
The following code shows how the PDFThumbnail control is used on an ASP.NET web form.

<%@ Page language="c#" %>
<%@ Register TagPrefix="tc"
Assembly="TallComponents.PDFThumbnail"
Namespace="TallComponents.Web.PDF" %>
<html>
<body>
<form method="post" runat="server">
<tc:thumbnail path="PDFThumbnail.pdf"
index="1"
runat="server"
url="www.tallcomponents.com"
borderwidth="1"
bordercolor="gray"
dpi="12" />
</form>
</body>
</html>

convert .pdf file to thumbnail view

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