C#利用iTextSharp 将jpg转换为pdf的方法

//C#利用iTextSharp 将jpg转换为pdf的方法 转载请注明来自 http://www.shang11.com

void ConvertJPG2PDF(string jpgfile, string pdf)
{
var document = new Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 25);
using (var stream = new FileStream(pdf, FileMode.Create, FileAccess.Write, FileShare.None))
{
PdfWriter.GetInstance(document, stream);
document.Open();
using (var imageStream = new FileStream(jpgfile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
var image = Image.GetInstance(imageStream);
if (image.Height > iTextSharp.text.PageSize.A4.Height - 25)
{
image.ScaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
}
else if (image.Width > iTextSharp.text.PageSize.A4.Width - 25)
{
image.ScaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
}
image.Alignment = iTextSharp.text.Image.ALIGN_MIDDLE;
document.Add(image);
}

document.Close();
}
}