ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / SymbolFactory Class / GenerateImage Method
Example Version

GenerateImage Method (SymbolFactory)
Generates an image for point symbols.
Syntax

Parameters

pointSymbol
imageFormat
scaleFactor
centerAnchorPoint
dpi
width
height
backgroundColor

Return Value

Example
Convert Point Symbol to SVG
//Note: Run within QueuedTask.Run
//Create a point symbol
var pointSymbol = SymbolFactory.Instance.ConstructPointSymbol(
  ColorFactory.Instance.RedRGB, 24, SimpleMarkerStyle.RoundedSquare);

//Generate image returns a stream
//OutputImageFormat specified the format for the image - in this case
//we want SVG (an xml-based format)
//
//output fmt: SVG, scale factor x2, centerAnchorPoint = true
//dpi = 300, wd x ht: 100x100px, background: white
var mem_strm = SymbolFactory.Instance.GenerateImage(
  pointSymbol, OutputImageFormat.SVG, 2.0, true, 300, 100, 100,
  ColorFactory.Instance.WhiteRGB);

//Set the memory stream position to the beginning
mem_strm.Seek(0, SeekOrigin.Begin);

//File path and name for saving the SVG file
var fileName = "RoundedSquareSymbol.svg";
string path_svg = Path.Combine(Path.GetTempPath() + fileName);

//Write the memory stream to the file
System.IO.File.WriteAllBytes(path_svg, mem_strm.ToArray());

//////////////////////////////////////////////
//Note: to convert SVG to image format, use a 3rd party
//e.g. Aspose.SVG for .NET, for example convert SVG to PNG
//using (var svg_doc = new Aspose.Svg.SVGDocument(path_svg))
//{
//  string path_png = Path.Combine(Path.GetTempPath() + "RoundedSquareSymbol.png");
//  using (var img_png = new Aspose.Svg.Rendering.Image.ImageDevice(
//    new ImageRenderingOptions(ImageFormat.Png), path_png))
//  {
//    svg_doc.RenderTo(img_png);
//  }
//  //also: https://docs.aspose.com/imaging/net/convert-svg-to-png/
//}
Convert Point Symbol to PNG
//Note: Run within QueuedTask.Run
//Create a point symbol
var pointSymbol = SymbolFactory.Instance.ConstructPointSymbol(
  ColorFactory.Instance.RedRGB, 24, SimpleMarkerStyle.RoundedSquare);

//Generate image returns a stream
//OutputImageFormat specified the format for the image - in this case
//we want PNG
//
//output fmt: PNG, scale factor x2, centerAnchorPoint = true
//dpi = 300, wd x ht: 100x100px, background: white
var mem_strm = SymbolFactory.Instance.GenerateImage(
  pointSymbol, OutputImageFormat.PNG, 2.0, true, 300, 100, 100,
  ColorFactory.Instance.WhiteRGB);

//Set the memory stream position to the beginning
mem_strm.Seek(0, SeekOrigin.Begin);

//Write the stream to a bit map
var bitmapImage = new System.Windows.Media.Imaging.BitmapImage();

bitmapImage.BeginInit();
bitmapImage.StreamSource = mem_strm;
bitmapImage.CacheOption = System.Windows.Media.Imaging.BitmapCacheOption.OnLoad;
bitmapImage.EndInit();
bitmapImage.Freeze();

//Write the bit map out to a file
//File path and name for saving the PNG file
var fileName = "RoundedSquareSymbol.png";
string path_png = Path.Combine(Path.GetTempPath() + fileName);

BitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bitmapImage));

using (var fileStream = new System.IO.FileStream(
  path_png, System.IO.FileMode.Create))
{
  encoder.Save(fileStream);
}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.4 or higher.
See Also