nuget 에서 iTextSharp 검색해여 "iTextSharp" 를 설치하면 iTextSharp 이 참조됩니다.

이를 통해 아래와 같이 개발을 진행하면 됩니다.

 

 

 

using iTextSharp.text;
using iTextSharp.text.pdf;

 

 

 

 

public ActionResult Sample()
        {
            string jpgfile = @"c:\users\lucks\documents\visual studio 2015\Projects\WebApplication2\WebApplication2\사이즈조절.PNG";
            string pdf = @"c:\users\lucks\documents\visual studio 2015\Projects\WebApplication2\WebApplication2\sample.pdf";

            ConvertJPG2PDF(jpgfile, pdf);

            return View();
        }

 

        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();
            }
        }