public static bool MergeFiles(string destinationFile, List<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
MemoryStream ms = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(document, ms);
// step 3: we open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page;
int rotation;
// step 4: we add content
while (f < sourceFiles.Count)
{
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);
}
}
f++;
if (f < sourceFiles.Count)
{
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.");
}
}
byte[] content = ms.ToArray();
using (FileStream fs = File.Create(destinationFile))
{
fs.Write(content, 0, (int)content.Length);
}
PdfReader reader2 = new PdfReader(destinationFile);
MemoryStream ms2 = new MemoryStream();
PdfStamper stamper = new PdfStamper(reader, ms2);
for (int i = 0; i < reader2.NumberOfPages; i++)
{
PdfContentByte canvas = stamper.GetOverContent(i);
ColumnText.ShowTextAligned(canvas, Element.ALIGN_LEFT, new Phrase("Page " + i + " of" + reader2.NumberOfPages), 10, 350, 90);
}
stamper.Close();
MessageBox.Show("I file PDF sono stati uniti correttamente");
return true;
}
catch (Exception e)
{
MessageBox.Show(e.Message);
return false;
}
}
答案 0 :(得分：4)
我自己解决了，希望它会有用
public static bool MergeFiles2(string destinationFile, List<string> sourceFiles)
{
try
{
//Phase 1: merging multiple files
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;
// step 1: creation of a document-object
Document document = new Document(reader.GetPageSizeWithRotation(1));
// step 2: we create a Memorystream for manipulating the files in memory
MemoryStream ms = new MemoryStream();
// step 3: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, ms);
// step 4: we open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page;
int rotation;
// step 4: we add content
while (f < sourceFiles.Count)
{
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);
}
}
f++;
if (f < sourceFiles.Count)
{
reader = new PdfReader(sourceFiles[f]);
// we retrieve the total number of pages
n = reader.NumberOfPages;
}
}
//step 5: we close the document
document.Close();
//step 6: we pass the stream into an array for passing all to an instance of PdfReader
byte[] content = ms.ToArray();
//Phase 2: Adding content to merged files
//Step 1: we create an instance of PdfReader that reads the content of the last MemoryStream used
PdfReader reader2 = new PdfReader(content);
//Step2: we create a new MemoryStream
MemoryStream ms2 = new MemoryStream();
//Step3: we create a PdfStamper with the last PdfReader and the last MemoryStream created
PdfStamper stamper = new PdfStamper(reader2, ms2);
//Step4: for each page of the merged PDF we add the index of the page on the left and with orientation vertical
for (int i = 1; i <= reader2.NumberOfPages; i++)
{
PdfContentByte canvas = stamper.GetOverContent(i);
ColumnText.ShowTextAligned(canvas, Element.ALIGN_LEFT, new Phrase("Page " + i + " of " + reader2.NumberOfPages), 10, 350, 90);
}
//Step5: we close the stamper
stamper.Close();
//Step6: we convert the MemoryStream to an array of bytes
byte[] content2 = ms2.ToArray();
//Step7: we finalize all creating the resultant file on the filesystem
using (FileStream fs = File.Create(destinationFile))
{
fs.Write(content2, 0, (int)content2.Length);
}
MessageBox.Show("I file PDF sono stati uniti correttamente");
return true;
}
catch (Exception e)
{
MessageBox.Show(e.Message);
return false;
}
}