994136: Added proper code example for radio button behavior with AllowUnisonSelection enabled and disabled in PDF forms.

Author: sameerkhan001

Forms/Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection/.NET/Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36616.10 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection", "Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection\Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection.csproj", "{1390DDC1-ACEC-4A88-83C4-CDAD5995870F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1390DDC1-ACEC-4A88-83C4-CDAD5995870F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1390DDC1-ACEC-4A88-83C4-CDAD5995870F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1390DDC1-ACEC-4A88-83C4-CDAD5995870F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1390DDC1-ACEC-4A88-83C4-CDAD5995870F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {00C8D2AA-C3E6-46E2-9751-A5F08C69CD2F}
+	EndGlobalSection
+EndGlobal

Forms/Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection/.NET/Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection/Output/gitkeep.txt

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+using Syncfusion.Drawing;
+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf.Interactive;
+
+//Create a PDF document
+using (PdfDocument document = new PdfDocument())
+{
+    //Page 1 - AllowUnisonSelection DISABLED(Independent behavior)
+    PdfPage page1 = document.Pages.Add();
+    page1.Graphics.DrawString("Independent Radio Buttons",
+        new PdfStandardFont(PdfFontFamily.Helvetica, 16),
+        PdfBrushes.Black, new PointF(10, 20));
+
+    PdfRadioButtonListField independentGroup = new PdfRadioButtonListField(page1, "IndependentGroup")
+    {
+        // Each button acts independently
+        AllowUnisonSelection = false
+    };
+    PdfRadioButtonListItem item1 = new PdfRadioButtonListItem("OptionA")
+    {
+        Bounds = new RectangleF(10, 60, 20, 20)
+    };
+    // Same label but independent
+    PdfRadioButtonListItem item2 = new PdfRadioButtonListItem("OptionA")
+    {
+        Bounds = new RectangleF(10, 100, 20, 20)
+    };
+    independentGroup.Items.Add(item1);
+    independentGroup.Items.Add(item2);
+    document.Form.Fields.Add(independentGroup);
+    page1.Graphics.DrawString("Option A (1)", new PdfStandardFont(PdfFontFamily.Helvetica, 12),
+        PdfBrushes.Black, new PointF(40, 60));
+    page1.Graphics.DrawString("Option A (2)", new PdfStandardFont(PdfFontFamily.Helvetica, 12),
+        PdfBrushes.Black, new PointF(40, 100));
+    //Page 2 - AllowUnisonSelection ENABLED(Unified behavior)
+    PdfPage page2 = document.Pages.Add();
+    page2.Graphics.DrawString("Unified Radio Buttons",
+        new PdfStandardFont(PdfFontFamily.Helvetica, 16),
+        PdfBrushes.Black, new PointF(10, 20));
+    PdfRadioButtonListField unifiedGroup = new PdfRadioButtonListField(page2, "UnifiedGroup")
+    {
+        // Buttons share selection state
+        AllowUnisonSelection = true
+    };
+    PdfRadioButtonListItem item3 = new PdfRadioButtonListItem("OptionB")
+    {
+        Bounds = new RectangleF(10, 60, 20, 20)
+    };
+    // Same label, unified selection
+    PdfRadioButtonListItem item4 = new PdfRadioButtonListItem("OptionB")
+    {
+        Bounds = new RectangleF(10, 100, 20, 20)
+    };
+    unifiedGroup.Items.Add(item3);
+    unifiedGroup.Items.Add(item4);
+    document.Form.Fields.Add(unifiedGroup);
+    page2.Graphics.DrawString("Option B (1)", new PdfStandardFont(PdfFontFamily.Helvetica, 12),
+        PdfBrushes.Black, new PointF(40, 60));
+    page2.Graphics.DrawString("Option B (2)", new PdfStandardFont(PdfFontFamily.Helvetica, 12),
+        PdfBrushes.Black, new PointF(40, 100));
+    //Save the document
+    document.Save(Path.GetFullPath(@"Output/Output.pdf"));
+}

Forms/Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection/.NET/Radio-button-behavior-in-PDF-forms-with-AllowUnisonSelection/Program.cs

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