2020年9月1日 星期二

Vb.net 整合 pdf [PDF Merge] 

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
    Public Shared Function MergePdfFiles(ByVal pdfFiles() As String, ByVal outputPath As String) As Boolean
        Dim result As Boolean = False
        Dim pdfCount As Integer = 0     'total input pdf file count
        Dim f As Integer = 0    'pointer to current input pdf file
        Dim fileName As String
        Dim reader As iTextSharp.text.pdf.PdfReader = Nothing
        Dim pageCount As Integer = 0
        Dim pdfDoc As iTextSharp.text.Document = Nothing    'the output pdf document
        Dim writer As PdfWriter = Nothing
        Dim cb As PdfContentByte = Nothing

        Dim page As PdfImportedPage = Nothing
        Dim rotation As Integer = 0

        Try
            pdfCount = pdfFiles.Length
            If pdfCount > 1 Then
                'Open the 1st item in the array PDFFiles
                fileName = pdfFiles(f)
                reader = New iTextSharp.text.pdf.PdfReader(fileName)
                'Get page count
                pageCount = reader.NumberOfPages

                pdfDoc = New iTextSharp.text.Document(reader.GetPageSizeWithRotation(1), 18, 18, 18, 18)

                writer = PdfWriter.GetInstance(pdfDoc, New FileStream(outputPath, FileMode.OpenOrCreate))


                With pdfDoc
                    .Open()
                End With
                'Instantiate a PdfContentByte object
                cb = writer.DirectContent
                'Now loop thru the input pdfs
                While f < pdfCount
                    'Declare a page counter variable
                    Dim i As Integer = 0
                    'Loop thru the current input pdf's pages starting at page 1
                    While i < pageCount
                        i += 1
                        'Get the input page size
                        pdfDoc.SetPageSize(reader.GetPageSizeWithRotation(i))
                        'Create a new page on the output document
                        pdfDoc.NewPage()
                        'If it is the 1st page, we add bookmarks to the page
                        'Now we get the imported page
                        page = writer.GetImportedPage(reader, i)
                        'Read the imported page's rotation
                        rotation = reader.GetPageRotation(i)
                        'Then add the imported page to the PdfContentByte object as a template based on the page's rotation
                        If rotation = 90 Then
                            cb.AddTemplate(page, 0, -1.0F, 1.0F, 0, 0, reader.GetPageSizeWithRotation(i).Height)
                        ElseIf rotation = 270 Then
                            cb.AddTemplate(page, 0, 1.0F, -1.0F, 0, reader.GetPageSizeWithRotation(i).Width + 60, -30)
                        Else
                            cb.AddTemplate(page, 1.0F, 0, 0, 1.0F, 0, 0)
                        End If
                    End While
                    'Increment f and read the next input pdf file
                    f += 1
                    If f < pdfCount Then
                        fileName = pdfFiles(f)
                        reader = New iTextSharp.text.pdf.PdfReader(fileName)
                        pageCount = reader.NumberOfPages
                    End If
                End While
                'When all done, we close the document so that the pdfwriter object can write it to the output file
                pdfDoc.Close()
                result = True
            End If
        Catch ex As Exception
            Return False
        End Try
        Return result
    End Function
於
標籤： , , , ,

沒有留言:

張貼留言

訂閱： 張貼留言 (Atom)