957011 Added sample code for apply Radial Gradient fill to shapes in a PDF document

Shapes/Multi-color-radial-gradient-fill-in-PDF/.NET/Multi-color-radial-gradient-fill-in-PDF.sln

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+
+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}") = "Multi-color-radial-gradient-fill-in-PDF", "Multi-color-radial-gradient-fill-in-PDF\Multi-color-radial-gradient-fill-in-PDF.csproj", "{6A8258DB-87FA-4361-B464-70774FD0E6AE}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{6A8258DB-87FA-4361-B464-70774FD0E6AE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6A8258DB-87FA-4361-B464-70774FD0E6AE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6A8258DB-87FA-4361-B464-70774FD0E6AE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6A8258DB-87FA-4361-B464-70774FD0E6AE}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Shapes/Multi-color-radial-gradient-fill-in-PDF/.NET/Multi-color-radial-gradient-fill-in-PDF/Multi-color-radial-gradient-fill-in-PDF.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Multi-color-radial-gradient-fill-in-PDF</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Shapes/Multi-color-radial-gradient-fill-in-PDF/.NET/Multi-color-radial-gradient-fill-in-PDF/Program.cs

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+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf;
+using Syncfusion.Drawing;
+
+// Create a new PDF document. 
+PdfDocument document = new PdfDocument();
+
+// Add a page to the document.
+PdfPage page = document.Pages.Add();
+
+// Get graphics context of the added page.
+PdfGraphics graphics = page.Graphics;
+
+// Define the rectangle dimensions.
+float rectWidth = 416;
+float rectHeight = 145;
+
+// Calculate the top-center position.
+float pageWidth = page.GetClientSize().Width;
+float rectX = (pageWidth - rectWidth) / 2; // Centered horizontally
+float rectY = 50; // Distance from the top
+
+// Define the rectangle path.
+PdfPath path = new PdfPath();
+path.AddRectangle(new RectangleF(rectX, rectY, rectWidth, rectHeight));
+
+// Define gradient colors using RGB (byte values from 0 to 255).
+List<PdfColor> finalGradientColors = new List<PdfColor>
+{
+    new PdfColor(0, 63, 255),     // Blue
+    new PdfColor(0, 200, 83),     // Green
+    new PdfColor(255, 193, 7),    // Amber
+    new PdfColor(255, 0, 139)     // Magenta
+};
+
+// Define positions for the gradient colors.
+List<float> finalGradientPositions = new List<float> { 0, 0.2f, 0.8f, 1 };
+
+// Create a color blend object for the gradient.
+PdfColorBlend gradientColorBlend = new PdfColorBlend
+{
+    Colors = finalGradientColors.ToArray(),
+    Positions = finalGradientPositions.ToArray()
+};
+
+// Calculate the center point and radius for the radial gradient.
+PointF center = new PointF(rectX + rectWidth / 2, rectY + rectHeight / 2);
+float radius = (float)Math.Sqrt((rectWidth * rectWidth) + (rectHeight * rectHeight)) / 2;
+
+// Create and configure the radial gradient brush.
+PdfRadialGradientBrush rectangleGradientBrush = new PdfRadialGradientBrush(
+    center, 0, center, radius,
+    finalGradientColors[0],
+    finalGradientColors[finalGradientColors.Count - 1]
+)
+{
+    InterpolationColors = gradientColorBlend
+};
+
+// Draw the gradient-filled rectangle.
+graphics.DrawPath(rectangleGradientBrush, path);
+
+//Create file stream.
+using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+{
+    document.Save(outputFileStream);
+}
+
+// Close the document and release resources.
+document.Close(true);