PDF生成后直接进入打印预览不用下载

using iTextSharp.text;

using iTextSharp.text.pdf;

Document pdfDoc = new Document(new Rectangle(mm(100.7f), mm(140.7f)), ml, mr, mt, mb);

MemoryStream pdfStream = new MemoryStream();

PdfWriter pdfWriter = PdfWriter.GetInstance(pdfDoc, pdfStream);

pdfDoc.Open();

pdfDoc.NewPage();

....//生成pdf文档内容

//给pdfWriter添加自动打印的script代码

StringBuilder script = new StringBuilder();

script.Append("this.print({bUI: true,bSilent: true,bShrinkToFit: false});");

pdfWriter.ViewerPreferences = PdfWriter.HideMenubar | PdfWriter.HideToolbar | PdfWriter.HideWindowUI;

pdfWriter.AddJavaScript(script.ToString()

pdfDoc.Close();

pdfWriter.Close();

//输出到客户端缓存

Response.Clear();

Response.ClearContent();

Response.ClearHeaders();

Response.ContentType = "application/pdf";

Response.Cache.SetCacheability(System.Web.HttpCacheability.Public);

Response.AddHeader("Content-Disposition", "inline; filename=" + fileName + ".pdf");

Response.BinaryWrite(pdfStream.ToArray());

Response.Flush();

Response.End();