IE不会在浏览器中显示生成的PDF

我已经尝试了很多方法来让它工作，如果我使用

Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", newFileInfo.Name));

代替

Response.AddHeader("Content-Disposition", string.Format("inline; filename={0}", newFileInfo.Name));

它工作，但我需要这显示在浏览器窗口正常工作。内联视图在Chrome中正常工作。我试过使用Response。BinaryWrite和Response。WriteFile和它没有区别

我用的是ie9。

下面是我的代码:

    Response.Clear();
    Response.ClearHeaders();
    Response.ClearContent();
    Response.Buffer = true;
    Response.ContentType = "application/pdf";
    Response.AddHeader("Pragma", "public");
    Response.AddHeader("expires", "0");
    Response.AddHeader("Cache-Control", "no-cache");
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    string filePath = Request["file"];
    string signatureFile = Request["SignatureImage"];
    double xPos = Convert.ToDouble(Request["X-Pos"]);
    double yPos = Convert.ToDouble(Request["Y-Pos"]);
    double scale = Convert.ToDouble(Request["Scale"]);
    if (!string.IsNullOrEmpty(filePath))
    {
        try
        {                
            string newFile = PDFTools.SignPDF(filePath, signatureFile, xPos, yPos, scale, tempDirectory);
            var newFileInfo = new FileInfo(newFile);
            Response.AddHeader("Content-Disposition", string.Format("inline; filename={0}", newFileInfo.Name));
            Response.AddHeader("content-length", newFileInfo.Length.ToString());
            Response.TransmitFile(newFile);
            Response.Flush();
            Response.Close();
        }
        catch (Exception ex)
        {
            Debug.WriteLine("Error: " + ex.Message);
            Debug.WriteLine("at " + ex.StackTrace);
        }
        finally
        {
            Response.End();
        }
    }

谢谢你的时间!