asp.net 使用密码C#保护pdf文件

4szc88ey  于 2023-01-22  发布在  .NET
关注(0)|答案(2)|浏览(176)
connetionString = ConfigurationManager.ConnectionStrings["conString"].ToString();
sql = "select Id,employeeName,employeePosition from Employee";
connection = new SqlConnection(connetionString);
connection.Open();
command = new SqlCommand(sql, connection);
adapter.SelectCommand = command;
adapter.Fill(ds);
connection.Close();

PdfDocument pdf = new PdfDocument();
pdf.Info.Title = "Database to PDF";
PdfPage pdfPage = pdf.AddPage();
XGraphics graph = XGraphics.FromPdfPage(pdfPage);
XFont font = new XFont("Verdana", 20, XFontStyle.Regular);

yPoint = yPoint + 100;

for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
    pubname = ds.Tables[0].Rows[i].ItemArray[0].ToString();
    city = ds.Tables[0].Rows[i].ItemArray[1].ToString();
    state = ds.Tables[0].Rows[i].ItemArray[2].ToString();
    graph.DrawString(pubname, font, XBrushes.Black, new XRect(40, yPoint, pdfPage.Width.Point, pdfPage.Height.Point), XStringFormats.TopLeft);
    graph.DrawString(city, font, XBrushes.Black, new XRect(120, yPoint, pdfPage.Width.Point, pdfPage.Height.Point), XStringFormats.TopLeft);
    graph.DrawString(state, font, XBrushes.Black, new XRect(400, yPoint, pdfPage.Width.Point, pdfPage.Height.Point), XStringFormats.TopLeft);
    yPoint = yPoint + 40;
}

string pdfFilename = "dbtopdf.pdf";
pdf.Save(pdfFilename);

我直接从数据库创建了一个pdf文件。我需要用密码保护pdf文件。

using (MemoryStream ObjememoryStream = new MemoryStream())
{
    PdfWriter.GetInstance(pdfDoc, ObjememoryStream);
    pdfDoc.Open();
    htmlworker.Parse(sr);
    pdfDoc.Close();
    byte[] Filebytes = ObjememoryStream.ToArray();
    ObjememoryStream.Close();
    using (MemoryStream inputData = new MemoryStream(Filebytes))
    {
        using (MemoryStream outputData = new MemoryStream())
        {
            string PDFFileword = txtPassword.Text;//you can also generate Dynamic word  
            PdfReader reader = new PdfReader(inputData);
            PdfEncryptor.Encrypt(reader, outputData, true, PDFFileword, PDFFileword, PdfWriter.ALLOW_SCREENREADERS);
            Filebytes = outputData.ToArray();
            File.WriteAllBytes(destPath, Filebytes);
            //Response.ContentType = "application/pdf";
            //Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf");
            //Response.Cache.SetCacheability(HttpCacheability.NoCache);
            //Response.BinaryWrite(Filebytes);
            //Response.End();
            GridView1.AllowPaging = true;
            GridView1.DataBind();
        }
    }
}

我设法用上面的代码用密码保护PDF文件,但它只适用于从网格视图生成的PDF文件。有人能告诉我如何用类似于我的第二个代码用第一种方法生成的密码保护PDF文件吗?

o2g1uqev

o2g1uqev1#

SecuritySettings中设置用户密码

pdf.SecuritySettings.UserPassword = "your password";
hmmo2u0o

hmmo2u0o2#

web.config中,add key元素添加路径,并且我有Date of Birth作为PDF Password。您可以使用anything来代替它。

<add key="Inputfile" value=”Path of pdf file where it is getting saved…”>
        <add key="Outputfile" value=”Path of pdf file where it has to be saved after getting password protected…”>   

        protected void passwordProtect(DateTime DateofBirth)
                {
                    string yourpdf = ConfigurationManager.AppSettings["Inputfile"];
                    string pdfWithPasswordA = ConfigurationManager.AppSettings["Outputfile"];
                    string InputFileA = yourpdf;
                    string OutputFileA = pdfWithPasswordA;

                    using (Stream input = new FileStream(InputFileA, FileMode.Open, FileAccess.Read, FileShare.Read))
                    {
                        using (Stream output = new FileStream(OutputFileA, FileMode.Create, FileAccess.Write, FileShare.None))
                        {
                            PdfReader reader = new PdfReader(input);
                            PdfEncryptor.Encrypt(reader, output, true, DateofBirth.ToString("yyyyMMdd"), "secret", PdfWriter.ALLOW_PRINTING | PdfWriter.ALLOW_COPY);
                        }
                    } 


            }

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