我正在尝试将多个 PDF 合并为一个。
我在编译时没有给出任何错误。我尝试先合并文档,但出了问题,因为我正在使用表格。
这是 asp.net 代码隐藏
if (Button.Equals("PreviewWord")) {
String eventTemplate = Server.MapPath("/ERAS/Badges/Template/EventTemp" + EventName + ".doc");
String SinglePreview = Server.MapPath("/ERAS/Badges/Template/PreviewSingle" + EventName + ".doc");
String PDFPreview = Server.MapPath("/ERAS/Badges/Template/PDFPreviewSingle" + EventName + ".pdf");
String previewPDFs = Server.MapPath("/ERAS/Badges/Template/PreviewPDFs" + EventName + ".pdf");
if (System.IO.File.Exists((String)eventTemplate))
{
if (vulGegevensIn == true)
{
//This creates a Worddocument and fills in names etc from database
CreateWordDocument(vulGegevensIn, eventTemplate, SinglePreview, false);
//This saves the SinglePreview.doc as a PDF @param place of PDFPreview
CreatePDF(SinglePreview, PDFPreview);
//Trying to merge
String[] previewsSmall=new String[1];
previewsSmall[0] = PDFPreview;
PDFMergenITextSharp.MergeFiles(previewPDFs, previewsSmall);
}
// merge PDFs here...........................;
//here
//no here//
//...
} }
这是 PDFMergenITextSharpClass
公共静态类 PDFMergenITextSharp {
public static void MergeFiles(string destinationFile, string[] sourceFiles)
{
try
{
int f = 0;
// we create a reader for a certain document
PdfReader reader = new PdfReader(sourceFiles[f]);
// we retrieve the total number of pages
int n = reader.NumberOfPages;
//Console.WriteLine("There are " + n + " pages in the original file.");
// step 1: creation of a document-object
Document document = new Document(reader.GetPageSizeWithRotation(1));
// step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(destinationFile, FileMode.Create));
// step 3: we open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page;
int rotation;
// step 4: we add content
while (f < sourceFiles.Length)
{
int i = 0;
while (i < n)
{
i++;
document.SetPageSize(reader.GetPageSizeWithRotation(i));
document.NewPage();
page = writer.GetImportedPage(reader, i);
rotation = reader.GetPageRotation(i);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
//Console.WriteLine("Processed page " + i);
}
f++;
if (f < sourceFiles.Length)
{
reader = new PdfReader(sourceFiles[f]);
// we retrieve the total number of pages
n = reader.NumberOfPages;
//Console.WriteLine("There are " + n + " pages in the original file.");
}
}
// step 5: we close the document
document.Close();
}
catch (Exception e)
{
string strOb = e.Message;
}
}
public static int CountPageNo(string strFileName)
{
// we create a reader for a certain document
PdfReader reader = new PdfReader(strFileName);
// we retrieve the total number of pages
return reader.NumberOfPages;
}
}
我找到了答案:
代替第二种方法,将更多文件添加到第一个输入文件数组中。
public static void CombineMultiplePDFs(string[] fileNames, string outFile)
{
// step 1: creation of a document-object
Document document = new Document();
//create newFileStream object which will be disposed at the end
using (FileStream newFileStream = new FileStream(outFile, FileMode.Create))
{
// step 2: we create a writer that listens to the document
PdfCopy writer = new PdfCopy(document, newFileStream);
// step 3: we open the document
document.Open();
foreach (string fileName in fileNames)
{
// we create a reader for a certain document
PdfReader reader = new PdfReader(fileName);
reader.ConsolidateNamedDestinations();
// step 4: we add content
for (int i = 1; i <= reader.NumberOfPages; i++)
{
PdfImportedPage page = writer.GetImportedPage(reader, i);
writer.AddPage(page);
}
PRAcroForm form = reader.AcroForm;
if (form != null)
{
writer.CopyAcroForm(reader);
}
reader.Close();
}
// step 5: we close the document and writer
writer.Close();
document.Close();
}//disposes the newFileStream object
}
我在这个网站上找到了一个非常好的解决方案:http://weblogs.sqlteam.com/mladenp/archive/2014/01/10/simple-merging-of-pdf-documents-with-itextsharp-5-4- 5.aspx
我在此模式下更新方法:
public static bool MergePDFs(IEnumerable<string> fileNames, string targetPdf)
{
bool merged = true;
using (FileStream stream = new FileStream(targetPdf, FileMode.Create))
{
Document document = new Document();
PdfCopy pdf = new PdfCopy(document, stream);
PdfReader reader = null;
try
{
document.Open();
foreach (string file in fileNames)
{
reader = new PdfReader(file);
pdf.AddDocument(reader);
reader.Close();
}
}
catch (Exception)
{
merged = false;
if (reader != null)
{
reader.Close();
}
}
finally
{
if (document != null)
{
document.Close();
}
}
}
return merged;
}
在 Itextsharp 中合并 PDF 的代码
public static void Merge(List<String> InFiles, String OutFile)
{
using (FileStream stream = new FileStream(OutFile, FileMode.Create))
using (Document doc = new Document())
using (PdfCopy pdf = new PdfCopy(doc, stream))
{
doc.Open();
PdfReader reader = null;
PdfImportedPage page = null;
//fixed typo
InFiles.ForEach(file =>
{
reader = new PdfReader(file);
for (int i = 0; i < reader.NumberOfPages; i++)
{
page = pdf.GetImportedPage(reader, i + 1);
pdf.AddPage(page);
}
pdf.FreeReader(reader);
reader.Close();
File.Delete(file);
});
}
}
使用 iTextSharp.dll
protected void Page_Load(object sender, EventArgs e)
{
String[] files = @"C:\ENROLLDOCS\A1.pdf,C:\ENROLLDOCS\A2.pdf".Split(',');
MergeFiles(@"C:\ENROLLDOCS\New1.pdf", files);
}
public void MergeFiles(string destinationFile, string[] sourceFiles)
{
if (System.IO.File.Exists(destinationFile))
System.IO.File.Delete(destinationFile);
string[] sSrcFile;
sSrcFile = new string[2];
string[] arr = new string[2];
for (int i = 0; i <= sourceFiles.Length - 1; i++)
{
if (sourceFiles[i] != null)
{
if (sourceFiles[i].Trim() != "")
arr[i] = sourceFiles[i].ToString();
}
}
if (arr != null)
{
sSrcFile = new string[2];
for (int ic = 0; ic <= arr.Length - 1; ic++)
{
sSrcFile[ic] = arr[ic].ToString();
}
}
try
{
int f = 0;
PdfReader reader = new PdfReader(sSrcFile[f]);
int n = reader.NumberOfPages;
Response.Write("There are " + n + " pages in the original file.");
Document document = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(destinationFile, FileMode.Create));
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page;
int rotation;
while (f < sSrcFile.Length)
{
int i = 0;
while (i < n)
{
i++;
document.SetPageSize(PageSize.A4);
document.NewPage();
page = writer.GetImportedPage(reader, i);
rotation = reader.GetPageRotation(i);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
Response.Write("\n Processed page " + i);
}
f++;
if (f < sSrcFile.Length)
{
reader = new PdfReader(sSrcFile[f]);
n = reader.NumberOfPages;
Response.Write("There are " + n + " pages in the original file.");
}
}
Response.Write("Success");
document.Close();
}
catch (Exception e)
{
Response.Write(e.Message);
}
}
合并多个PDF文件的字节数组:
public static byte[] MergePDFs(List<byte[]> pdfFiles)
{
if (pdfFiles.Count > 1)
{
PdfReader finalPdf;
Document pdfContainer;
PdfWriter pdfCopy;
MemoryStream msFinalPdf = new MemoryStream();
finalPdf = new PdfReader(pdfFiles[0]);
pdfContainer = new Document();
pdfCopy = new PdfSmartCopy(pdfContainer, msFinalPdf);
pdfContainer.Open();
for (int k = 0; k < pdfFiles.Count; k++)
{
finalPdf = new PdfReader(pdfFiles[k]);
for (int i = 1; i < finalPdf.NumberOfPages + 1; i++)
{
((PdfSmartCopy)pdfCopy).AddPage(pdfCopy.GetImportedPage(finalPdf, i));
}
pdfCopy.FreeReader(finalPdf);
}
finalPdf.Close();
pdfCopy.Close();
pdfContainer.Close();
return msFinalPdf.ToArray();
}
else if (pdfFiles.Count == 1)
{
return pdfFiles[0];
}
return null;
}
我在任何地方都没有看到这个解决方案,据说......根据一个人的说法,正确的方法是使用 copyPagesTo()。这确实有效,我测试过。在城市和开放道路驾驶之间,您的里程可能会有所不同。祝你好运。
public static bool MergePDFs(List<string> lststrInputFiles, string OutputFile, out int iPageCount, out string strError)
{
strError = string.Empty;
PdfWriter pdfWriter = new PdfWriter(OutputFile);
PdfDocument pdfDocumentOut = new PdfDocument(pdfWriter);
PdfReader pdfReader0 = new PdfReader(lststrInputFiles[0]);
PdfDocument pdfDocument0 = new PdfDocument(pdfReader0);
int iFirstPdfPageCount0 = pdfDocument0.GetNumberOfPages();
pdfDocument0.CopyPagesTo(1, iFirstPdfPageCount0, pdfDocumentOut);
iPageCount = pdfDocumentOut.GetNumberOfPages();
for (int ii = 1; ii < lststrInputFiles.Count; ii++)
{
PdfReader pdfReader1 = new PdfReader(lststrInputFiles[ii]);
PdfDocument pdfDocument1 = new PdfDocument(pdfReader1);
int iFirstPdfPageCount1 = pdfDocument1.GetNumberOfPages();
iPageCount += iFirstPdfPageCount1;
pdfDocument1.CopyPagesTo(1, iFirstPdfPageCount1, pdfDocumentOut);
int iFirstPdfPageCount00 = pdfDocumentOut.GetNumberOfPages();
}
pdfDocumentOut.Close();
return true;
}
另请访问并阅读这篇文章,我在其中详细解释了有关 如何在 C# 中使用 Itextsharp 将多个 PDF 文件合并为单个 PDF
实施:
try
{
string FPath = "";
// Create For loop for get/create muliple report on single click based on row of gridview control
for (int j = 0; j < Gridview1.Rows.Count; j++)
{
// Return datatable for data
DataTable dtDetail = new My_GlobalClass().GetDataTable(Convert.ToInt32(Gridview1.Rows[0]["JobId"]));
int i = Convert.ToInt32(Gridview1.Rows[0]["JobId"]);
if (dtDetail.Rows.Count > 0)
{
// Create Object of ReportDocument
ReportDocument cryRpt = new ReportDocument();
//Store path of .rpt file
string StrPath = Application.StartupPath + "\\RPT";
StrPath = StrPath + "\\";
StrPath = StrPath + "rptCodingvila_Articles_Report.rpt";
cryRpt.Load(StrPath);
// Assign Report Datasource
cryRpt.SetDataSource(dtDetail);
// Assign Reportsource to Report viewer
CryViewer.ReportSource = cryRpt;
CryViewer.Refresh();
// Store path/name of pdf file one by one
string StrPathN = Application.StartupPath + "\\Temp" + "\\Codingvila_Articles_Report" + i.ToString() + ".Pdf";
FPath = FPath == "" ? StrPathN : FPath + "," + StrPathN;
// Export Report in PDF
cryRpt.ExportToDisk(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat, StrPathN);
}
}
if (FPath != "")
{
// Check for File Existing or Not
if (System.IO.File.Exists(Application.StartupPath + "\\Temp" + "\\Codingvila_Articles_Report.pdf"))
System.IO.File.Delete(Application.StartupPath + "\\Temp" + "\\Codingvila_Articles_Report.pdf");
// Split and store pdf input file
string[] files = FPath.Split(',');
// Marge Multiple PDF File
MargeMultiplePDF(files, Application.StartupPath + "\\Temp" + "\\Codingvila_Articles_Report.pdf");
// Open Created/Marged PDF Output File
Process.Start(Application.StartupPath + "\\Temp" + "\\Codingvila_Articles_Report.pdf");
// Check and Delete Input file
foreach (string item in files)
{
if (System.IO.File.Exists(item.ToString()))
System.IO.File.Delete(item.ToString());
}
}
}
catch (Exception ex)
{
XtraMessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
为 Marge PDF 创建函数
public static void MargeMultiplePDF(string[] PDFfileNames, string OutputFile)
{
iTextSharp.text.Document PDFdoc = new iTextSharp.text.Document();
using (System.IO.FileStream MyFileStream = new System.IO.FileStream(OutputFile, System.IO.FileMode.Create))
{
iTextSharp.text.pdf.PdfCopy PDFwriter = new iTextSharp.text.pdf.PdfCopy(PDFdoc, MyFileStream);
if (PDFwriter == null)
{
return;
}
PDFdoc.Open();
foreach (string fileName in PDFfileNames)
{
iTextSharp.text.pdf.PdfReader PDFreader = new iTextSharp.text.pdf.PdfReader(fileName);
PDFreader.ConsolidateNamedDestinations();
for (int i = 1; i <= PDFreader.NumberOfPages; i++)
{
iTextSharp.text.pdf.PdfImportedPage page = PDFwriter.GetImportedPage(PDFreader, i);
PDFwriter.AddPage(page);
}
iTextSharp.text.pdf.PRAcroForm form = PDFreader.AcroForm;
if (form != null)
{
PDFwriter.CopyAcroForm(PDFreader);
}
PDFreader.Close();
}
PDFwriter.Close();
PDFdoc.Close();
}
}