创建 pdf.The 进程时出错，无法访问正在被另一个进程使用的 file.because

Question

我正在将网页 div 导出为 pdf 并将该邮件发送到 pdf。第一次创建 pdf 并发送邮件 properly.but 下次它给出错误提示。此行的另一个进程正在使用文件

 PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream(strPath, FileMode.Create));

我的aspx.cs代码是-

System.IO.StringWriter stringWrite = new System.IO.StringWriter();


                System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
                design.RenderControl(htmlWrite);
                string myText = stringWrite.ToString().Replace("&", "&amp;");
                StringReader sr = new StringReader(myText.ToString());
                Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);

                string strPath = Request.PhysicalApplicationPath + "\Temp\WeeklyReport of " + Projname + ".pdf";
                PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream(strPath, FileMode.Create));
                pdfDoc.Open();
                XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr);

                pdfDoc.Close();
                pdfDoc.Dispose();

                LblNoteMsg.Text = strPath;
                DateTime input = DateTime.Now;
                int delta = DayOfWeek.Monday - input.DayOfWeek;
                DateTime dats = DateTime.Now.AddDays(delta);
                //this week
                DateTime monday = input.AddDays(delta);
                string MonDate = monday.ToShortDateString();
                DateTime sat = monday.AddDays(5);
                string SatDate = sat.ToShortDateString();
                StreamReader r = new StreamReader(Server.MapPath("~/WeeklyMail.txt"));
                string body = r.ReadToEnd();
                MailMessage Msg = new MailMessage();
                string MailId = txtMailId.Text;
                foreach (string ss in MailId.Split(",".ToCharArray()))
                {
                    if (string.IsNullOrEmpty(ss) == false)
                    {
                        Msg.To.Add(new MailAddress(ss));
                    }
                }


                Msg.Subject = "Weekly status Report";
                Msg.Body = body;
                Msg.IsBodyHtml = true;
                Msg.Attachments.Add(new Attachment(strPath));

                SmtpClient MailServer = new SmtpClient();
                try
                {

                    MailServer.Send(Msg);

Answer 1

在下面的代码中，您可以为文件名添加一些时间戳，以便创建不同的文件。

string strPath = Request.PhysicalApplicationPath + "\Temp\WeeklyReport of " + Projname + ".pdf";

到

string strPath = Request.PhysicalApplicationPath + "\Temp\WeeklyReport of " + Projname + DateTime.Now.ToString("dd-MM-yyyy_HH:mm:ss") +".pdf";

Answer 2

我通过添加日期和时间更改了文件名。

string strPath = Request.PhysicalApplicationPath + "\Temp\WeeklyReport of " + Projname + DateTime.Now.ToString(" dd-MM-yyyy_HH-mm-ss") + ".pdf";

Answer 3

发送邮件后

Msg.Attachments.Dispose();

创建 pdf.The 进程时出错，无法访问正在被另一个进程使用的 file.because

giving error while creating pdf.The process cannot access the file.because it is being used by another process

c#

pdf

asp.net

itextsharp