我正在使用iTextSharp將來自microsoft報表查看器的多個pdf連接在一起。下面的代碼中的page.AddImage(image__1)拋出一個錯誤的對象引用未設置爲對象的實例。我沒有看到什麼是無所事事。是否有不同的方式可以從報告查看器加入報告並添加水印圖像?如何將圖像添加到PDF文檔?
mybytes = MSRptViewer1.LocalReport.Render("PDF", Nothing, Nothing, Nothing, Nothing, Nothing, Nothing)
reader = New iTextSharp.text.pdf.PdfReader(mybytes)
numberOfPages = reader.NumberOfPages
currentPageNumber = 0
Dim imageFile As String = Server.MapPath("WaterMark.png")
Dim buffer As Byte() = IO.File.ReadAllBytes(imageFile)
Dim image__1 As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(buffer)
image__1.SetAbsolutePosition(100, 100)
Do While (currentPageNumber < numberOfPages)
currentPageNumber += 1
doc.SetPageSize(PageSize.LETTER)
doc.NewPage()
page = writer.GetImportedPage(reader, currentPageNumber)
page.AddImage(image__1)
rotation = reader.GetPageRotation(currentPageNumber)
If (rotation = 90) Or (rotation = 270) Then
cb.AddTemplate(page, 0, -1.0F, 1.0F, 0, 0, reader.GetPageSizeWithRotation(currentPageNumber).Height)
Else
cb.AddTemplate(page, 1.0F, 0, 0, 1.0F, 0, 0)
End If
Loop
可能重複的[如何在現有PDF中插入iTextSharp圖像?](http://stackoverflow.com/questions/583629/how-can-i-insert-an-image-with-itextsharp- in-an-existing-pdf) –