959682- Apply a radial gradient fill to a rectangle in a PDF document

Brushes/Radial-gradient-rectangle-in-PDF/.NET/Radial-gradient-rectangle-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}") = "Radial-gradient-rectangle-in-PDF", "Radial-gradient-rectangle-in-PDF\Radial-gradient-rectangle-in-PDF.csproj", "{D570FDA5-9A74-4EF2-879A-BC4DEE988669}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D570FDA5-9A74-4EF2-879A-BC4DEE988669}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D570FDA5-9A74-4EF2-879A-BC4DEE988669}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D570FDA5-9A74-4EF2-879A-BC4DEE988669}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D570FDA5-9A74-4EF2-879A-BC4DEE988669}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Brushes/Radial-gradient-rectangle-in-PDF/.NET/Radial-gradient-rectangle-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();
+
+// Create PDF graphics object for the page.
+PdfGraphics graphics = page.Graphics;
+
+// Define rectangle dimensions.
+float rectWidth = 150f;
+float rectHeight = 150f;
+
+// Calculate position to center the rectangle horizontally at the top.
+float pageWidth = page.GetClientSize().Width;
+float startX = (pageWidth - rectWidth) / 2;
+float startY = 60f; // Positioned near the top
+
+// Define the rectangle path.
+PdfPath path = new PdfPath();
+path.AddRectangle(new RectangleF(startX, startY, rectWidth, rectHeight));
+
+// Define a smooth gradient color scheme.
+List<PdfColor> gradientColors = new List<PdfColor>
+        {
+            Color.CornflowerBlue,
+            Color.MediumPurple,
+            Color.DeepPink
+        };
+
+List<float> gradientPositions = new List<float> { 0.0f, 0.5f, 1.0f };
+
+PdfColorBlend colorBlend = new PdfColorBlend
+{
+    Colors = gradientColors.ToArray(),
+    Positions = gradientPositions.ToArray()
+};
+
+// Calculate the radius for the radial gradient.
+float radius = (float)Math.Sqrt((rectWidth * rectWidth) + (rectHeight * rectHeight)) / 2;
+
+// Create a radial gradient brush centered in the rectangle.
+PointF center = new PointF(startX + rectWidth / 2, startY + rectHeight / 2);
+PdfRadialGradientBrush radialBrush = new PdfRadialGradientBrush(center, 0, center, radius, gradientColors[0], gradientColors[gradientColors.Count - 1])
+{
+    InterpolationColors = colorBlend
+};
+
+// Draw the rectangle with the radial gradient fill.
+graphics.DrawPath(radialBrush, path);
+
+// Save the document to file.
+using (FileStream fileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+{
+    document.Save(fileStream);
+}
+
+// Close the document.
+document.Close(true);

Brushes/Radial-gradient-rectangle-in-PDF/.NET/Radial-gradient-rectangle-in-PDF/Radial-gradient-rectangle-in-PDF.csproj

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