![]() |
Chilkat • HOME • Android™ • AutoIt • C • C# • C++ • Chilkat2-Python • CkPython • Classic ASP • DataFlex • Delphi DLL • Go • Java • Node.js • Objective-C • PHP Extension • Perl • PowerBuilder • PowerShell • PureBasic • Ruby • SQL Server • Swift • Tcl • Unicode C • Unicode C++ • VB.NET • VBScript • Visual Basic 6.0 • Visual FoxPro • Xojo Plugin
(Xojo Plugin) Certify a PDF and Lock the Entire DocumentSee more PDF Signatures ExamplesThis example demonstrates how to a sign a certify a PDF and lock the entire document. Normally this is intended to seal the document with a final approving (or dissapproving) signature; usually after a review workflow is completed and normally reserved for the creator or author of a document.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Dim pdf As New Chilkat.Pdf // Load a PDF to be certified and locked. // The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf Dim success As Boolean success = pdf.LoadFile("qa_data/pdf/hello.pdf") If (success = False) Then System.DebugLog(pdf.LastErrorText) Return End If // Options for signing are specified in JSON. Dim json As New Chilkat.JsonObject // In most cases, the signingCertificateV2 and signingTime attributes are required. success = json.UpdateInt("signingCertificateV2",1) success = json.UpdateInt("signingTime",1) // The only coding difference with certifying and locking a PDF // as compared with an approval signature (also known as recipient signature) // is to add the "lockAfterSigning" and "docMDP.add" to the json. success = json.UpdateBool("lockAfterSigning",True) success = json.UpdateBool("docMDP.add",True) // Put the signature on page 1, top left success = json.UpdateInt("page",1) success = json.UpdateString("appearance.y","top") success = json.UpdateString("appearance.x","left") // Use a font scale of 10.0 success = json.UpdateString("appearance.fontScale","10.0") // In this example, the appearance of the digital signature will contain three lines: // 1) The signing certificate's common name // 2) The current date/time // 3) Some arbitrary text. // The keyword "cert_cn" is replaced with the Certificate's Subject Common Name. // The keyword "current_dt" is replaced with the current date/time. // Any number of appearance text lines can be added. success = json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn") success = json.UpdateString("appearance.text[1]","current_dt") success = json.UpdateString("appearance.text[2]","The crazy brown fox jumps over the lazy dog.") // Load the signing certificate. (Use your own certificate.) Dim cert As New Chilkat.Cert success = cert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","secret") If (success = False) Then System.DebugLog(cert.LastErrorText) Return End If // Tell the pdf object to use the certificate for signing. success = pdf.SetSigningCert(cert) If (success = False) Then System.DebugLog(pdf.LastErrorText) Return End If success = pdf.SignPdf(json,"qa_output/hello_signed.pdf") If (success = False) Then System.DebugLog(pdf.LastErrorText) Return End If System.DebugLog("The PDF has been successfully certified and locked.") |
© 2000-2025 Chilkat Software, Inc. All Rights Reserved.