void runJob(Action job)
{
if (!File.Exists(PdfFilePath))
{
throw new InvalidOperationException(BadFileErrorMessage);
}
var acrobatPdfDocType = Type.GetTypeFromProgID("AcroExch.PDDoc");
if (acrobatPdfDocType == null || !isAdobeSdkInstalled)
{
throw new InvalidOperationException(SdkError);
}
_pdfDoc = (CAcroPDDoc)Activator.CreateInstance(acrobatPdfDocType);
if (_pdfDoc == null)
{
throw new InvalidOperationException(AdobeObjectsErrorMessage);
}
var acrobatPdfRectType = Type.GetTypeFromProgID("AcroExch.Rect");
_pdfRect = (CAcroRect)Activator.CreateInstance(acrobatPdfRectType);
var result = _pdfDoc.Open(PdfFilePath);
if (!result)
{
throw new InvalidOperationException(BadFileErrorMessage);
}
job();
releaseComObjects();
}
private void ScootRect(CAcroRect cAcroRect, int verticalShift, int horizontalShift)
{
cAcroRect.Top += (short)verticalShift;
cAcroRect.bottom += (short)verticalShift;
cAcroRect.Left += (short)horizontalShift;
cAcroRect.right += (short)horizontalShift;
}
public Pdf(string fileName)
{
_fileName = fileName;
_document = (CAcroPDDoc)Interaction.CreateObject("AcroExch.PDDoc", "");
if (!_document.Open(fileName))
{
throw new FileNotFoundException(fileName);
}
_rect = (CAcroRect)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.Rect", "");
}
private string SearchAround(int top, int bottom, int left, int right, int page, string expected, double threshold)
{
CAcroRect cAcroRect = Factory.TypeLoader.GetRect();
cAcroRect.Top = (short)top;
cAcroRect.bottom = (short)bottom;
cAcroRect.Left = (short)left;
cAcroRect.right = (short)right;
string found = "";
for (int instruction = 0; instruction < 5; instruction++)
{
switch (instruction)
{
case 0:
found = ReadRect(cAcroRect, page);
break;
case 1:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
case 2:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
case 3:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
case 4:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
default:
found = "";
break;
}
found = TrimAtLineBreak(found);
if (Levenshtein.EditDistance.IsCloseTo(found, expected, threshold))
{
break;
}
}
return(found);
}
private void ExportAsImage(string strFile, string strExportPath)
{
if (!Directory.Exists(strExportPath))
{
Directory.CreateDirectory(strExportPath);
}
Acrobat.AcroPDDoc pdf = new AcroPDDoc();
pdf.Open(strFile);
int pageCount = Convert.ToInt32(txtPage.Text);
int count = pdf.GetNumPages();
for (int i = 0; i < count; i++)
{
if (i == pageCount)
{
break;
}
listMsg.Items.Add($"正在导出第{i + 1}页(共{count}页)");
listMsg.TopIndex = listMsg.Items.Count - 1;
int zoom = 1;
while (true)
{
try
{
CAcroPDPage page = (CAcroPDPage)pdf.AcquirePage(i);
CAcroRect pdfRect = (Acrobat.CAcroRect)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.Rect", "");
CAcroPoint pdfPoint = (Acrobat.CAcroPoint)page.GetSize();
int imgWidth = (int)((double)pdfPoint.x * zoom);
int imgHeight = (int)((double)pdfPoint.y * zoom);
//设置裁剪矩形的大小为当前页的大小
pdfRect.Left = 0;
pdfRect.right = (short)imgWidth;
pdfRect.Top = 0;
pdfRect.bottom = (short)imgHeight;
page.CopyToClipboard(pdfRect, 0, 0, (short)(100 * zoom));
Object obj = Clipboard.GetData(DataFormats.Bitmap);
using (Bitmap bitmap = (Bitmap)obj)
{
SavePicture(bitmap, strExportPath, Path.GetFileNameWithoutExtension(strFile), (i + 1).ToString());
}
}
catch (Exception e)
{
continue;
}
break;
}
}
}
private string SearchAroundRegex(int top, int bottom, int left, int right, int page, Regex exp)
{
CAcroRect cAcroRect = Factory.TypeLoader.GetRect();
cAcroRect.Top = (short)top;
cAcroRect.bottom = (short)bottom;
cAcroRect.Left = (short)left;
cAcroRect.right = (short)right;
string found = "";
for (int instruction = 0; instruction < 5; instruction++)
{
switch (instruction)
{
case 0:
found = ReadRect(cAcroRect, page);
break;
case 1:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
case 2:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
case 3:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
case 4:
ScootRect(cAcroRect, 5, 0);
found = ReadRect(cAcroRect, page);
break;
default:
found = "";
break;
}
if (exp.IsMatch(found))
{
break;
}
}
return(found);
}
private string ReadRect(CAcroRect cAcroRect, int page)
{
CAcroPDTextSelect textSelect = (CAcroPDTextSelect)_pdDoc.CreateTextSelect(page, cAcroRect);
if (textSelect == null)
{
return("");
}
else
{
string text = "";
int endText = textSelect.GetNumText();
for (int vector = 0; vector < endText; vector++)
{
text += textSelect.GetText(vector);
}
return(text);
}
}
//http://www.myexception.cn/c-sharp/1506415.html
//http://www.aspose.com/docs/display/pdfnet/Generate+Thumbnail+Images+from+PDF+Documents
public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, double resolution)
{
CAcroPDDoc pdfDoc = null;
CAcroPDPage pdfPage = null;
CAcroRect pdfRect = null;
CAcroPoint pdfPoint = null;
// Create the document (Can only create the AcroExch.PDDoc object using late-binding)
// Note using VisualBasic helper functions, have to add reference to DLL
pdfDoc = (CAcroPDDoc)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.PDDoc", "");
// validate parameter
if (!pdfDoc.Open(pdfInputPath))
{
throw new FileNotFoundException();
}
if (!Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > pdfDoc.GetNumPages() || endPageNum <= 0)
{
endPageNum = pdfDoc.GetNumPages();
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum; startPageNum = endPageNum; endPageNum = startPageNum;
}
if (imageFormat == null)
{
imageFormat = ImageFormat.Jpeg;
}
if (resolution <= 0)
{
resolution = 1;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
pdfPage = (CAcroPDPage)pdfDoc.AcquirePage(i - 1);
pdfPoint = (CAcroPoint)pdfPage.GetSize();
pdfRect = (CAcroRect)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.Rect", "");
int imgWidth = (int)((double)pdfPoint.x * resolution);
int imgHeight = (int)((double)pdfPoint.y * resolution);
pdfRect.Left = 0;
pdfRect.right = (short)imgWidth;
pdfRect.Top = 0;
pdfRect.bottom = (short)imgHeight;
// Render to clipboard, scaled by 100 percent (ie. original size)
// Even though we want a smaller image, better for us to scale in .NET
// than Acrobat as it would greek out small text
pdfPage.CopyToClipboard(pdfRect, 0, 0, (short)(100 * resolution));
IDataObject clipboardData = Clipboard.GetDataObject();
if (clipboardData != null && clipboardData.GetDataPresent(DataFormats.Bitmap))
{
string _dir = Path.Combine(imageOutputPath, imageName);
string _path = _dir + "_" + i.ToString() + ".jpg";
if (File.Exists(_path))
{
File.Delete(_path);
}
Bitmap pdfBitmap = (Bitmap)clipboardData.GetData(DataFormats.Bitmap);
pdfBitmap.Save(_path, imageFormat);
pdfBitmap.Dispose();
}
}
pdfDoc.Close();
Marshal.ReleaseComObject(pdfPage);
Marshal.ReleaseComObject(pdfRect);
Marshal.ReleaseComObject(pdfDoc);
Marshal.ReleaseComObject(pdfPoint);
}
void runJob(Action job)
{
if (!File.Exists(PdfFilePath))
throw new InvalidOperationException(BadFileErrorMessage);
var acrobatPdfDocType = Type.GetTypeFromProgID("AcroExch.PDDoc");
if (acrobatPdfDocType == null || !isAdobeSdkInstalled)
throw new InvalidOperationException(SdkError);
_pdfDoc = (CAcroPDDoc)Activator.CreateInstance(acrobatPdfDocType);
if (_pdfDoc == null)
throw new InvalidOperationException(AdobeObjectsErrorMessage);
var acrobatPdfRectType = Type.GetTypeFromProgID("AcroExch.Rect");
_pdfRect = (CAcroRect)Activator.CreateInstance(acrobatPdfRectType);
var result = _pdfDoc.Open(PdfFilePath);
if (!result)
throw new InvalidOperationException(BadFileErrorMessage);
job();
releaseComObjects();
}
