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我需要加载pdf,添加文本并保存到新文件中。 有了这段代码看看工作,但我有一些图像下的图像中的文字,我看不到它。 我能做些什么?itextsharp中的图像文字
Dim oldFile As String = Application.StartupPath & "\old.pdf"
Dim newFile As String = Application.StartupPath & "\new.pdf"
Dim reader As New PdfReader(oldFile)
Dim size As Rectangle = reader.GetPageSizeWithRotation(1)
Dim document As New Document(size)
Dim wNnumberOfPages As Integer = reader.NumberOfPages
Dim fs As New FileStream(newFile, FileMode.Create, FileAccess.Write)
Dim writer As PdfWriter = PdfWriter.GetInstance(document, fs)
document.Open()
Dim cb As PdfContentByte = writer.DirectContent
Dim bf As BaseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED)
Dim wPage As Integer
For wPage = 1 To wNnumberOfPages
Dim _text As String = "TEXT"
Dim Page As PdfImportedPage = writer.GetImportedPage(reader, wPage)
cb.BeginText()
cb.SetFontAndSize(bf, 10)
cb.ShowTextAligned(2, _text, 470, 760, 0)
cb.EndText()
cb.AddTemplate(Page, 0, 0)
document.NewPage()
Next
document.Close()
fs.Close()
writer.Close()
reader.Close()