使用 itextsharp pdf 套表

MemoryStream msFtpFile = fc.Get(FileName, false);
//FileStream stream = new FileStream(FileFullPath, FileMode.Open, FileAccess.Read, FileShare.Read);
//Byte[] pdfByte = new Byte[stream.Length];
//stream.Read(pdfByte, 0, pdfByte.Length);
//stream.Seek(0, SeekOrigin.Begin);
//stream.Close();
//PdfReader pdfReader = new PdfReader(pdfByte);
PdfReader pdfReader = new PdfReader(msFtpFile.ToArray());
MemoryStream ms = new MemoryStream();
//string tmpFilePath = FilePath + "\temp\" + Guid.NewGuid().ToString() + ".pdf";
//FileStream tmpOutPutFile = new FileStream(tmpFilePath, FileMode.CreateNew);
//PdfStamper pdfStamper = new PdfStamper(pdfReader, tmpOutPutFile);
//PdfStamper pdfStamper = new PdfStamper(pdfReader, Response.OutputStream);
PdfStamper pdfStamper = new PdfStamper(pdfReader, ms);
pdfReader.Close();
pdfStamper.Writer.CloseStream = false;
pdfStamper.FormFlattening = true;

// 取得PDF樣版所設定要套表的欄位
AcroFields pdfForm = pdfStamper.AcroFields; 
// 設定中文字型檔
BaseFont.AddToResourceSearch(WebBinPath + "\iTextAsian.dll");
BaseFont.AddToResourceSearch(WebBinPath + "\iTextAsianCmaps.dll");
// 使用字型設定
BaseFont bfMHei = BaseFont.CreateFont("MHei-Medium", "UniCNS-UCS2-H", BaseFont.EMBEDDED);
// 欄位屬性設定
pdfForm.SetFieldProperty(item.Field, "textfont", bfMHei, null);
// 欄位填值
pdfForm.SetField(item.Field, value);