主题：[讨论]FileManager控件中文件打开后能不能加上水印

Dim reader As New iTextSharp.text.pdf.PdfReader("d:\test.pdf")

Dim n As Integer = reader.NumberOfPages
Dim str As String = ""
For i As Integer = 1 To n
    Dim strategy As object = New iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy()
    Dim currentText As String = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(Reader, i, strategy)
    
    currentText = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.[Default], Encoding.UTF8, Encoding.[Default].GetBytes(currentText)))
    str &= currentText
    
Next
msgbox(str)
reader.Close()