937636 Modified the code changes for digital signature.

Digital Signature/New folder/.NET/Verify-digital-sign-in-existing-PDF.sln → Digital Signature/Check-If-PDF-Is-Signed/.NET/Check-If-PDF-Is-Signed.sln

@@ -3,7 +3,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.12.35707.178 d17.12
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Verify-digital-sign-in-existing-PDF", "Verify-digital-sign-in-existing-PDF\Verify-digital-sign-in-existing-PDF.csproj", "{3DD425D8-40B2-4D5E-8ADD-66522B701503}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Check-If-PDF-Is-Signed", "Check-If-PDF-Is-Signed\Check-If-PDF-Is-Signed.csproj", "{3DD425D8-40B2-4D5E-8ADD-66522B701503}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

Digital Signature/New folder/.NET/Verify-digital-sign-in-existing-PDF/Verify-digital-sign-in-existing-PDF.csproj → Digital Signature/Check-If-PDF-Is-Signed/.NET/Check-If-PDF-Is-Signed/Check-If-PDF-Is-Signed.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net8.0</TargetFramework>
-    <RootNamespace>Verify_digital_sign_in_existing_PDF</RootNamespace>
+    <RootNamespace>Check-If-PDF-Is-Signed</RootNamespace>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Digital Signature/Check-If-PDF-Is-Signed/.NET/Check-If-PDF-Is-Signed/Program.cs

@@ -0,0 +1,37 @@
+using System;
+using System.IO;
+using System.Reflection.Metadata;
+using Syncfusion.Pdf.Parsing;
+
+
+// Open the signed PDF file for reading
+using (FileStream inputFileStream = new FileStream(Path.GetFullPath(@"Data/Input.pdf"), FileMode.Open, FileAccess.Read))
+{
+    // Load the PDF document
+    PdfLoadedDocument loadedDocument = new PdfLoadedDocument(inputFileStream);
+
+    // Check if the document contains a form with fields
+    if (loadedDocument.Form == null || loadedDocument.Form.Fields.Count == 0)
+    {
+        Console.WriteLine("No signature fields found in the document.");
+    }
+    else
+    {
+        // Iterate through all fields in the form
+        foreach (PdfLoadedField field in loadedDocument.Form.Fields)
+        {
+            // Check if the field is a signature field
+            PdfLoadedSignatureField signatureField = field as PdfLoadedSignatureField;
+            if (signatureField != null)
+            {
+                // Determine whether the signature field is signed or not
+                string status = signatureField.IsSigned ? "Signed" : "UnSigned";
+
+                // Output the result for each signature field
+                Console.WriteLine("Signature Field " + signatureField.Name + " is: " + status);
+            }
+        }
+    }
+    //Close the document
+    loadedDocument.Close(true);
+}