920569 Added widget annotation sample.

Forms/Modify-the-widget-annotation-in-PDF-document/.NET/Modify-the-widget-annotation-in-PDF-document.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35327.3
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Modify-the-widget-annotation-in-PDF-document", "Modify-the-widget-annotation-in-PDF-document\Modify-the-widget-annotation-in-PDF-document.csproj", "{CCB9348A-9780-471A-B1D8-24302CE07ED7}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{CCB9348A-9780-471A-B1D8-24302CE07ED7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CCB9348A-9780-471A-B1D8-24302CE07ED7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CCB9348A-9780-471A-B1D8-24302CE07ED7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CCB9348A-9780-471A-B1D8-24302CE07ED7}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {2BEE5587-7C68-4AA1-B722-EC1E82301ABA}
+	EndGlobalSection
+EndGlobal

Forms/Modify-the-widget-annotation-in-PDF-document/.NET/Modify-the-widget-annotation-in-PDF-document/Modify-the-widget-annotation-in-PDF-document.csproj

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

Forms/Modify-the-widget-annotation-in-PDF-document/.NET/Modify-the-widget-annotation-in-PDF-document/Program.cs

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+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+using Syncfusion.Pdf;
+
+//Load the PDF document.
+FileStream docStream = new FileStream(Path.GetFullPath(@"Data/Input.pdf"), FileMode.Open, FileAccess.Read);
+PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);
+// Loop through each page in the loaded PDF document.
+foreach (PdfLoadedPage page in loadedDocument.Pages)
+{
+    // Access the form within the loaded document.
+    PdfLoadedForm form = loadedDocument.Form;
+    // Check if the forms are null.
+    if (form == null)
+    {
+        // Loop through each annotation on the current page.
+        foreach (PdfLoadedAnnotation annot in page.Annotations)
+        {
+            // Check if the annotation is a widget annotation.
+            if (annot is PdfLoadedWidgetAnnotation)
+            {
+                // Cast the annotation to a PdfLoadedWidgetAnnotation type.
+                PdfLoadedWidgetAnnotation widget = annot as PdfLoadedWidgetAnnotation;
+                // Set the widget's text value to "true".
+                widget.Text = "true";
+            }
+        }
+    }
+}
+//Create file stream.
+using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+{
+    //Save the PDF document to file stream.
+    loadedDocument.Save(outputFileStream);
+}
+//Close the document.
+loadedDocument.Close(true);