在我的Windows应用程序中使用axAcroPdfLib.AxAcroPDF控件时,我无法重新加载相同的图像。图像最初使用LoadFile()方法加载。
使用Windows 7 64位,VS 2010,VB.NET.
代码在下面。现在,我只是想给它划一条简单的界线。
Private Sub _btnBarCode_Click(ByVal sender As Object, ByVal e As EventArgs) Handles _btnBarCode.Click
Dim pdfReader As iTextSharp.text.pdf.PdfReader = Nothing
Try
pdfReader = New iTextSharp.text.pdf.PdfReader(File.ReadAllBytes(_path))
Using fs As New FileStream(_path, FileMode.Create, FileAccess.Write)
Using pdfStamper = New iTextSharp.text.pdf.PdfStamper(pdfReader, fs)
Dim pdfPage As iTextSharp.text.pdf.PdfContentByte = pdfStamper.GetOverContent(1)
Using barCodeForm As New FBarCode
barCodeForm.Barcode = _barCode
If (barCodeForm.ShowDialog(Me) = DialogResult.OK) Then
Dim screenBarCode As Point = barCodeForm.Location
Dim clientBarCode As Point = Point.op_Subtraction(PointToClient(screenBarCode), New Point(0, 50)) '_pdfControl.Location '_imgView.Location
clientBarCode = New Point(10, 50)
Dim barcodeImg As New Bitmap(200, 50)
Using gc As Graphics = Graphics.FromImage(barcodeImg)
gc.DrawLine(Pens.Red, New Point(10, 10), New Point(20, 20))
'barCodeForm._barCode.DrawBarCode(gc, clientBarCode)
End Using
Dim convert As ImageConverter = New ImageConverter()
Dim bmpBytes As Byte() = DirectCast(convert.ConvertTo(barcodeImg, GetType(Byte())), Byte())
Dim thisImage As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(bmpBytes)
thisImage.SetAbsolutePosition(clientBarCode.X, clientBarCode.Y)
thisImage.SetDpi(72, 72)
pdfPage.AddImage(thisImage)
rdrAdobePdf.LoadFile(_path) 'Blank pdf
'rdrAdobePdf.src = _path '"Does not begin with '%PDF-' (even though it does)
'Me.Close()
'_myParent.ResetPdfViewer()
'ReloadPdfViewer(Me.Barcode)
End If
End Using
End Using
End Using
Catch ex As Exception
MessageBox.Show(ex.Message, "An error occurred.")
Return
Finally
If Not pdfReader Is Nothing Then pdfReader.Close()
End Try
End Sub有什么想法吗?这里有什么问题?
发布于 2013-08-21 21:12:21
通过从单击方法中获取重新加载代码解决了问题。将其放入另一个单击方法解决了问题--不确定原因。我使用的代码只运行.LoadFile,然后运行Form.Show()和Form.Activate()。
https://stackoverflow.com/questions/18338924
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