How to make a password in the resulting PDF using C# and .NET
In today's digital world, data security comes first. It is especially important to protect confidential files such as reports, financial documents or personal information that is stored in PDF files. In this article, we will discuss in detail how to use C# and .Net you can automate the process of creating a PDF from Excel with the addition of a password using a powerful tool — SautinSoft Excel To PDF .NET. The code is easily integrated into existing systems, which significantly reduces the time needed to prepare and protect files.
Manually adding passwords to PDF files often takes a long time and is prone to human error, especially with large amounts of data. Automation of this process by means of the program code provides:
- Fast: automatic generation of protected PDFs in a matter of seconds.
- Security: reduces the risk of unauthorized access.
- Scalability: easily handle thousands of files.
- Integration: automate into operational business processes.
This method is indispensable for:
- Business analysts and accountants who create daily reports from Excel and want to automatically protect them before distribution.
- Developers who create automated reporting systems where it is important to ensure the confidentiality of transmitted data.
- IT departments responsible for corporate document security.
Modern companies are increasingly looking to automate repetitive tasks to increase efficiency and reduce the risk of errors. The processing of confidential data without automatic protection is a rare phenomenon. Businesses in the financial sector, government agencies, medical institutions, and law firms use such solutions all the time to ensure information security. At the same time, accurate statistics on the use of such solutions depend on the scale of the company and the specifics of the business, but the trend towards automation and security is steadily growing.
This code example shows how to convert xlsx file to a password-protected PDF file.
Step-by-Step:
- Add SautinSoft.ExcelToPdf from Nuget.
- Load a document.
- Set the password.
- Save a PDF document.
Complete code
GitHubusing System;
using System.IO;
using SautinSoft;
namespace Sample
{
class Sample
{
static void Main(string[] args)
{
// Before starting, we recommend to get a free key:
// https://sautinsoft.com/start-for-free/
// Apply the key here:
// SautinSoft.ExcelToPdf.SetLicense("...");
// Make a password in resulting PDF
ExcelToPdf x = new ExcelToPdf();
// Set PDF as output format.
x.OutputFormat = SautinSoft.ExcelToPdf.eOutputFormat.Pdf;
// Set the password for PDF.
x.Options.PdfSecurity.EncryptionAlgorithm = ExcelToPdf.PdfEncryptionAlgorithm.RC4_128;
x.Options.PdfSecurity.Permissions = ExcelToPdf.PdfPermissions.Printing;
x.Options.PdfSecurity.UserPassword = "123456";
// The password cannot be in PDF-A. Change to PDF 1.5.
x.Options.PdfVersion = ExcelToPdf.COptions.ePdfVersion.PDF_15;
string excelFile = Path.GetFullPath(@"..\..\..\test.xlsx");
string pdfFile = Path.ChangeExtension(excelFile, ".pdf"); ;
try
{
x.ConvertFile(excelFile, pdfFile);
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(pdfFile) { UseShellExecute = true });
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.ReadLine();
}
}
}
}
Imports System
Imports System.IO
Imports SautinSoft
Module Sample
Sub Main()
' Before starting, we recommend to get a free key:
' https://sautinsoft.com/start-for-free/
' Apply the key here:
' SautinSoft.ExcelToPdf.SetLicense("...");
' Make a password in resulting PDF
Dim x As New ExcelToPdf()
' Set PDF as output format.
x.OutputFormat = SautinSoft.ExcelToPdf.eOutputFormat.Pdf
' Set the password for PDF.
x.Options.PdfSecurity.EncryptionAlgorithm = ExcelToPdf.PdfEncryptionAlgorithm.RC4_128
x.Options.PdfSecurity.Permissions = ExcelToPdf.PdfPermissions.Printing
x.Options.PdfSecurity.UserPassword = "123456"
' The password cannot be in PDF-A. Change to PDF 1.5.
x.Options.PdfVersion = ExcelToPdf.COptions.ePdfVersion.PDF_15
Dim excelFile As String = Path.GetFullPath("..\..\..\test.xlsx")
Dim pdfFile As String = Path.ChangeExtension(excelFile, ".pdf")
Try
x.ConvertFile(excelFile, pdfFile)
System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(pdfFile) With {.UseShellExecute = True})
Catch ex As Exception
Console.WriteLine(ex.Message)
Console.ReadLine()
End Try
End Sub
End Module
If you need a new code example or have a question: email us at support@sautinsoft.com or ask at Online Chat (right-bottom corner of this page) or use the Form below: