public ActionResult ExtractImages(FormCollection collection)
{
// get the PDF file
string pdfFile = Server.MapPath("~") + @"\DemoFiles\Pdf\InputPdf.pdf";
// create the PDF images extractor
PdfImagesExtract pdfImagesExtract = new PdfImagesExtract();
// set a demo serial number
pdfImagesExtract.SerialNumber = "YCgJMTAE-BiwJAhIB-EhlWTlBA-UEBRQFBA-U1FOUVJO-WVlZWQ==";
int fromPdfPageNumber = int.Parse(collection["textBoxFromPage"]);
int toPdfPageNumber = collection["textBoxToPage"].Length > 0 ? int.Parse(collection["textBoxToPage"]) : 0;
// extract the images from PDF document to memory in .NET Image objects
// the images can also be extracted to a folder using the ExtractToImageFiles method
// or they can be extracted one by one using the RaiseImageExtractedEvent method
ExtractedPdfImage[] extractedImages = pdfImagesExtract.ExtractToImageObjects(pdfFile, fromPdfPageNumber, toPdfPageNumber);
// return if no image was extracted
if (extractedImages.Length == 0)
{
return(Redirect("/ExtractImagesFromPdf"));
}
// get the largest image bytes in a buffer
byte[] imageBuffer = null;
try
{
// select the largest image
ExtractedPdfImage largestImage = null;
for (int i = 0; i < extractedImages.Length; i++)
{
if (largestImage == null || extractedImages[i].ImageObject.Size.Width * extractedImages[i].ImageObject.Size.Height >
largestImage.ImageObject.Size.Width * largestImage.ImageObject.Size.Height)
{
largestImage = extractedImages[i];
}
}
// get the .NET Image object
System.Drawing.Image imageObject = largestImage.ImageObject;
// get the image data in a buffer
imageBuffer = GetImageBuffer(imageObject);
}
finally
{
// dispose the extracted images
for (int i = 0; i < extractedImages.Length; i++)
{
extractedImages[i].Dispose();
}
}
FileResult fileResult = new FileContentResult(imageBuffer, "image/png");
fileResult.FileDownloadName = "ExtractedImage.png";
return(fileResult);
}
protected void buttonExtractImages_Click(object sender, EventArgs e)
{
// get the PDF file
string pdfFile = Server.MapPath("~") + @"\DemoFiles\Pdf\InputPdf.pdf";
// create the PDF images extractor
PdfImagesExtract pdfImagesExtract = new PdfImagesExtract();
// set a demo serial number
pdfImagesExtract.SerialNumber = "YCgJMTAE-BiwJAhIB-EhlWTlBA-UEBRQFBA-U1FOUVJO-WVlZWQ==";
int fromPdfPageNumber = int.Parse(textBoxFromPage.Text);
int toPdfPageNumber = textBoxToPage.Text.Length > 0 ? int.Parse(textBoxToPage.Text) : 0;
// extract the images from PDF document to memory in .NET Image objects
// the images can also be extracted to a folder using the ExtractToImageFiles method
// or they can be extracted one by one using the RaiseImageExtractedEvent method
ExtractedPdfImage[] extractedImages = pdfImagesExtract.ExtractToImageObjects(pdfFile, fromPdfPageNumber, toPdfPageNumber);
// return if no image was extracted
if (extractedImages.Length == 0)
{
return;
}
// get the largest image bytes in a buffer
byte[] imageBuffer = null;
try
{
// select the largest image
ExtractedPdfImage largestImage = null;
for (int i = 0; i < extractedImages.Length; i++)
{
if (largestImage == null || extractedImages[i].ImageObject.Size.Width * extractedImages[i].ImageObject.Size.Height >
largestImage.ImageObject.Size.Width * largestImage.ImageObject.Size.Height)
{
largestImage = extractedImages[i];
}
}
// get the .NET Image object
System.Drawing.Image imageObject = largestImage.ImageObject;
// get the image data in a buffer
imageBuffer = GetImageBuffer(imageObject);
}
finally
{
// dispose the extracted images
for (int i = 0; i < extractedImages.Length; i++)
{
extractedImages[i].Dispose();
}
}
// inform the browser about the binary data format
HttpContext.Current.Response.AddHeader("Content-Type", "image/png");
// let the browser know how to open the image and the image name
HttpContext.Current.Response.AddHeader("Content-Disposition",
String.Format("attachment; filename={0}; size={1}", "ExtractedImage.png", imageBuffer.Length.ToString()));
// write the image buffer to HTTP response
HttpContext.Current.Response.BinaryWrite(imageBuffer);
// call End() method of HTTP response to stop ASP.NET page processing
HttpContext.Current.Response.End();
}