彩票走势图

使用GdPicture.NET可以在将图像扫描之后导出为PDF格式，并可进行编辑。比如导出的PDF图像拥有很多页，那么可以快速的在PDF文件中添加图片，并可实现定位添加，可以在任一PDF页面添加图片。

下面是代码示例：

Dim oGdPicturePDF As New GdPicturePDF
        Dim oGdPictureImaging As New GdPictureImaging

        oGdPicturePDF.LoadFromFile("c:\input.pdf", False)
        Dim ImageID As Integer = oGdPictureImaging.CreateGdPictureImageFromFile("c:\input.tif")

        oGdPicturePDF.SelectPage(1)

        Dim pageWidth As Single = oGdPicturePDF.GetPageWidth
        Dim pageHeight As Single = oGdPicturePDF.GetPageHeight

        oGdPicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitPoint)
        oGdPicturePDF.SetOrigin(PdfOrigin.PdfOriginBottomLeft)

        Dim imageResName As String = oGdPicturePDF.AddImageFromGdPictureImage(ImageID, False, False)
        oGdPictureImaging.ReleaseGdPictureImage(ImageID)
        oGdPicturePDF.DrawImage(imageResName, pageWidth / 3, pageHeight / 3, pageWidth / 3, pageHeight / 3)
        oGdPicturePDF.SaveToFile("c:\output.pdf")
        oGdPicturePDF.CloseDocument()