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Commit d6f0090

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Sowmiya Loganathan
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Add digital signature samples
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‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.3.32819.101
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Multiple-digital-signature", "Multiple-digital-signature\Multiple-digital-signature.csproj", "{1CBB87CB-9DA9-402C-B4C6-5689C8BBD562}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{1CBB87CB-9DA9-402C-B4C6-5689C8BBD562}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{1CBB87CB-9DA9-402C-B4C6-5689C8BBD562}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{1CBB87CB-9DA9-402C-B4C6-5689C8BBD562}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{1CBB87CB-9DA9-402C-B4C6-5689C8BBD562}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {6A4F1F24-46E9-4E32-8DC7-54D8A5A39FE4}
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EndGlobalSection
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EndGlobal

‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature/Multiple-digital-signature.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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<RootNamespace>Multiple_digital_signature</RootNamespace>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Pdf.NET" Version="20.3.0.60" />
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</ItemGroup>
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</Project>

‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature/PDF.pfx‎

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‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature/Program.cs‎

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// See https://aka.ms/new-console-template for more information
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using Syncfusion.Pdf.Graphics;
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using Syncfusion.Pdf.Parsing;
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using Syncfusion.Pdf.Security;
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using Syncfusion.Pdf;
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//Load an existing PDF document.
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FileStream docStream = new FileStream(Path.GetFullPath("../../../SignatureFields.pdf"), FileMode.Open, FileAccess.Read);
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PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);
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//Get the first page of the document.
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PdfLoadedPage page = loadedDocument.Pages[0] as PdfLoadedPage;
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//Get the first signature field of the PDF document.
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PdfLoadedSignatureField signatureField1 = loadedDocument.Form.Fields[0] as PdfLoadedSignatureField;
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//Create a certificate instance from a PFX file with a private key.
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FileStream certificateStream = new FileStream(Path.GetFullPath("../../../PDF.pfx"), FileMode.Open, FileAccess.Read);
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PdfCertificate certificate1 = new PdfCertificate(certificateStream, "syncfusion");
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//Add a signature to the signature field.
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signatureField1.Signature = new PdfSignature(loadedDocument, page, certificate1, "Signature", signatureField1);
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//Set an image for the signature field.
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FileStream imageStream1 = new FileStream(Path.GetFullPath("../../../Student Signature.jpg"), FileMode.Open, FileAccess.Read);
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PdfBitmap signatureImage = new PdfBitmap(imageStream1);
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//Insert an image in the signature appearance.
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signatureField1.Signature.Appearance.Normal.Graphics.DrawImage(signatureImage, 0, 0, 90, 20);
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//Save the document into the stream.
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MemoryStream stream = new MemoryStream();
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loadedDocument.Save(stream);
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//Load the signed PDF document.
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PdfLoadedDocument signedDocument = new PdfLoadedDocument(stream);
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//Load the PDF page.
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PdfLoadedPage loadedPage = signedDocument.Pages[0] as PdfLoadedPage;
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//Get the first signature field of the PDF document.
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PdfLoadedSignatureField signatureField2 = signedDocument.Form.Fields[1] as PdfLoadedSignatureField;
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//Add a signature to the signature field.
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signatureField2.Signature = new PdfSignature(signedDocument, loadedPage, certificate1, "Signature", signatureField2);
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//Set an image for the signature field.
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FileStream imageStream2 = new FileStream(Path.GetFullPath("../../../Teacher Signature.png"), FileMode.Open, FileAccess.Read);
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PdfBitmap signatureImage1 = new PdfBitmap(imageStream2);
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//Draw an image in the signature appearance.
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signatureField2.Signature.Appearance.Normal.Graphics.DrawImage(signatureImage1, 0, 0, 90, 20);
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//Create file stream.
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using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"../../../Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
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{
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//Save the PDF document to file stream.
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signedDocument.Save(outputFileStream);
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}
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//Close the document.
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signedDocument.Close(true);
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loadedDocument.Close(true);

‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature/SignatureFields.pdf‎

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‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature/Student Signature.jpg‎

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‎Digital Signature/Multiple-digital-signature/.NET/Multiple-digital-signature/Teacher Signature.png‎

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‎Digital Signature/Remove_existing_digital_signature_from_PDF/.NET/Remove_existing_digital_signature_from_PDF.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.3.32819.101
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Remove_existing_digital_signature_from_PDF", "Remove_existing_digital_signature_from_PDF\Remove_existing_digital_signature_from_PDF.csproj", "{78A40DE4-F2D5-44A1-9599-C166318E805B}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{78A40DE4-F2D5-44A1-9599-C166318E805B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{78A40DE4-F2D5-44A1-9599-C166318E805B}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{78A40DE4-F2D5-44A1-9599-C166318E805B}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{78A40DE4-F2D5-44A1-9599-C166318E805B}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {3D8228EC-6D8B-4F32-98BC-68E5CE7E2650}
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EndGlobalSection
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EndGlobal

‎Digital Signature/Remove_existing_digital_signature_from_PDF/.NET/Remove_existing_digital_signature_from_PDF/Program.cs‎

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// See https://aka.ms/new-console-template for more information
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using Syncfusion.Pdf.Parsing;
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//Load an existing PDF document.
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FileStream docStream = new FileStream(Path.GetFullPath("../../../SignedPDF.pdf"), FileMode.Open, FileAccess.Read);
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PdfLoadedDocument pdfLoadedDocument = new PdfLoadedDocument(docStream);
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//Get the signature field from PDF form field collection.
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PdfLoadedSignatureField signatureField = pdfLoadedDocument.Form.Fields[0] as PdfLoadedSignatureField;
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//Remove signature field from form field collection.
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pdfLoadedDocument.Form.Fields.Remove(signatureField);
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//Create file stream.
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using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"../../../Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
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{
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//Save the PDF document to file stream.
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pdfLoadedDocument.Save(outputFileStream);
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}
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//Close the document.
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pdfLoadedDocument.Close(true);

‎Digital Signature/Remove_existing_digital_signature_from_PDF/.NET/Remove_existing_digital_signature_from_PDF/Remove_existing_digital_signature_from_PDF.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Pdf.NET" Version="20.3.0.60" />
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</ItemGroup>
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</Project>

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