![]() ![]() Private Sub button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) If openFileDialog1.ShowDialog() = .OK Then Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) New PdfSignature("Ironpdf.pfx", "123456").SignPdfFile(textBox1.Text) Here we have called an PDFSignature method to digitally sign the Existing PDF Private void button2_Click(object sender, System.EventArgs e) TextBox1.Text = openFileDialog1.FileName If (openFileDialog1.ShowDialog() = DialogResult.OK) Private void button1_Click(object sender, System.EventArgs e) We use the “SignPdfFile(FileName)” method, and select the file we want to sign. pfx file (Personal Information Exchange Format), which is used to transfer a certificate with the help of private key. In the below code example, we used a C# form to allow the user to select their desired PDF, which can receive a digital signature with a single click. Will you be creating a new document or signing an existing PDF? ![]() You can use it free for development to test your work. Today, we'll be using IronPDF to save us time and effort in applying the signature, only a single line of code. Now, let's see the steps for creating an x509certificate2 to digitally sign a PDF using C#. ![]() This will need to be created with Adobe Acrobat in order for it to work. Digital IDs are used for certificate security and digital signatures. A digital ID usually contains your name and email address, the name of the organization that issued it, a serial number, and an expiration date. Understanding Digital SignaturesĪ Digital Signature is like an electronic driver’s license or passport that proves your identity. Access the C# Library in Visual Studio and let's add a signature. Get it whichever way is easier for you, either from DLL download or on the NuGet website. Check the signed PDF in the directory specified in step 4įirst, install IronPDF to your Visual Studio project.Use SignPdfFile method to open and sign existing PDF.Pass digital signature and private password to PdfSignature class.Use Window form to better visual the process.Install C# library to add digital signature to PDFs.= 1 // use 2 if a cover page will be appended ![]()
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