PdfSignatureBuilder(IExternalSigner, String) Constructor

Initializes a new instance of the PdfSignatureBuilder class with specified settings.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v21.1.Core.dll

NuGet Package: DevExpress.Pdf.Core

Declaration

C#

public PdfSignatureBuilder(
    IExternalSigner signer,
    string formFieldName
)

VB.NET

Public Sub New(
    signer As IExternalSigner,
    formFieldName As String
)

Parameters

Name	Type	Description
signer	IExternalSigner	An object used to generate a signature.
formFieldName	String	The name of the signature form field to sign.

Exceptions

Type	Description
TspValidationException	Occurs if the field with the specified name does not exist.

Remarks

Use this class constructor to sign an existing form field.

Use the Pkcs7Signer class to generate the PKCS#7 signature. Create the Pkcs7SignerBase class descendant to use a custom object to generate the PKCS#7 signature.

C#

//Load a document to be signed:
using (var signer = new PdfDocumentSigner("Document.pdf"))
{
    //Create a PKCS#7 signature:
    Pkcs7Signer pkcs7Signature = new Pkcs7Signer("Signing Documents//testcert.pfx", "123", HashAlgorithmType.SHA256);

    //Apply a signature to the 'Sign' form field:
    var signatureBuilder = new PdfSignatureBuilder(pkcs7Signature, "Sign");

    //Specify the signature's image and signer information:
    signatureBuilder.SetImageData(System.IO.File.ReadAllBytes("Signing Documents//Jane Cooper.jpg"));
    signatureBuilder.Location = "USA";
    signatureBuilder.Name = "Jane Cooper";
    signatureBuilder.Reason = "I Agree";

    //Sign and save the document:
    signer.SaveDocument("SignedDocument.pdf", signatureBuilder);
}

VB.NET

' Load a document to be signed:
Using signer = New PdfDocumentSigner("Document.pdf")

  ' Create a PKCS#7 signature:
  Dim pkcs7Signature As New Pkcs7Signer("Signing Documents//testcert.pfx", "123", HashAlgorithmType.SHA256)

  ' Apply the signature to the 'Sign' form field:
  Dim signatureBuilder = New PdfSignatureBuilder(pkcs7Signature, "Sign")

  ' Specify the signature's image and signer information:
  signatureBuilder.SetImageData(System.IO.File.ReadAllBytes("Signing Documents//Jane Cooper.jpg"))
  signatureBuilder.Location = "USA"
  signatureBuilder.Name = "Jane Cooper"
  signatureBuilder.Reason = "I Agree"

  ' Sign and save the document:
  signer.SaveDocument("SignedDocument.pdf", signatureBuilder)
End Using