Merge pull request #271 from SyncfusionExamples/1046084

1046084: Added Sample GitHub code for Missing PDF UG Topics

Author: chinnumuniyappan

Annotation/Flatten-Redaction-Annotation/.NET/Flatten-Redaction-Annotation.slnx

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+<Solution>
+  <Project Path="Flatten-Redaction-Annotation/Flatten-Redaction-Annotation.csproj" />
+</Solution>

Annotation/Flatten-Redaction-Annotation/.NET/Flatten-Redaction-Annotation/Data/Input.pdf

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Flatten_Redaction_Annotation</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Imaging.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Annotation/Flatten-Redaction-Annotation/.NET/Flatten-Redaction-Annotation/Flatten-Redaction-Annotation.csproj

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+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+using Syncfusion.Pdf.Redaction;
+
+//Load the PDF document.
+using (PdfLoadedDocument loadedDocument = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input.pdf")))
+{
+    //Get the annotation from annotation collection. 
+    foreach (PdfAnnotation annot in loadedDocument.Pages[0].Annotations)
+    {
+        //Check for the Redaction annotation.
+        if (annot is PdfLoadedRedactionAnnotation)
+        {
+            //Get the redaction annotation. 
+            PdfLoadedRedactionAnnotation redactAnnot = annot as PdfLoadedRedactionAnnotation;
+            //Flatten the redaction annotation. 
+            redactAnnot.Flatten = true;
+        }
+    }
+    loadedDocument.Redact();
+    //Save the document
+    loadedDocument.Save(Path.GetFullPath(@"Output/Output.pdf"));
+}

Annotation/Flatten-Redaction-Annotation/.NET/Flatten-Redaction-Annotation/Output/.gitkeep

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+<Solution>
+  <Project Path="Retrieve-Custom-PDF-Annotation-Values/Retrieve-Custom-PDF-Annotation-Values.csproj" />
+</Solution>

Annotation/Flatten-Redaction-Annotation/.NET/Flatten-Redaction-Annotation/Program.cs

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+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+
+// Load the PDF document
+using (PdfLoadedDocument loadedDocument = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input.pdf")))
+{
+    // Get the first page of the document
+    PdfLoadedPage page = loadedDocument.Pages[0] as PdfLoadedPage;
+    // Get the annotation collection from the page
+    PdfLoadedAnnotationCollection annotations = page.Annotations;
+    // Get the first annotation (assumed to be a rectangle annotation)
+    PdfLoadedRectangleAnnotation annot = annotations[8] as PdfLoadedRectangleAnnotation;
+    // Try to get the custom value "Subtype" from the annotation
+    object values;
+    bool foundValue = annot.TryGetValue("Subtype", out values);
+    // Check and print the values if found
+    if (foundValue && values is List<string> stringValues)
+    {
+        foreach (string value in stringValues)
+        {
+            // Print the custom value to the console
+            Console.WriteLine($"Found Subtype value: {value}");
+        }
+    }
+    else
+    {
+        Console.WriteLine("Subtype value not found.");
+    }
+}

Annotation/Retrieve-Custom-PDF-Annotation-Values/.NET/Retrieve-Custom-PDF-Annotation-Values.slnx

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Retrieve_Custom_PDF_Annotation_Values</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Annotation/Retrieve-Custom-PDF-Annotation-Values/.NET/Retrieve-Custom-PDF-Annotation-Values/Data/Input.pdf

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+<Solution>
+  <Project Path="Managing-Form-Field-Visibility/Managing-Form-Field-Visibility.csproj" />
+</Solution>