Annotations in Windows Forms Map (Maps)

15 Jun 20215 minutes to read

Annotations are used to add some message on map. In Maps control, annotations are denoted using the following major properties:

1. AnnotationLabel: Shows some information in text format.

2. AnnotationStroke: Applies specific color to annotations.

3. Latitude and Longitude: Position the annotations anywhere on the map based on latitude and longitude, which are string types, used to set coordinates of the MapAnnotation in the form of latitude and longitude.

Code sample:

C#

partial class Form1
{

         private void InitializeComponent()
         {

            this.mapsControl1 = new Syncfusion.Windows.Forms.Maps.Maps();

            this.mapsControl1.Name = "mapsControl1";

            this.mapsControl1.Size = new System.Drawing.Size(880, 585); 

            this.Controls.Add(this.mapsControl1);  

            this.ClientSize = new System.Drawing.Size(880, 585);          

            this.Load += new System.EventHandler(this.Form1_Load);

         }

            private Syncfusion.Windows.Forms.Maps.Maps mapsControl1;

}

C#

public partial class Form1 : Form
{

        private void Form1_Load(object sender, EventArgs e)
        {

            this.MetroColor = Color.White;

            this.mapsControl1.Dock = DockStyle.Fill;

            this.mapsControl1.Margin = new Padding(0, 0, 4, 0);

            this.mapsControl1.MapBackgroundBrush = new SolidBrush(Color.White);

            this.mapsControl1.MapItemsShape = Syncfusion.Windows.Forms.Maps.MapItemShapes.None;


            MapViewModel model = new MapViewModel();


             ShapeFileLayer shapeLayer = new ShapeFileLayer();

             shapeLayer.Uri = "world1.shp";

             shapeLayer.ItemSource = model.Countries;

             shapeLayer.ShapeSetting.ShapeFill = "#E5E5E5";

             shapeLayer.ShapeSetting.ShapeStrokeThickness = 1.5;

             shapeLayer.ShapeSetting.ShapeStroke = "#C1C1C1";


            shapeLayer.Annotations.Add(new Annotation() { AnnotationLabel = "North America", Latitude = 40.4230, Longitude = -112.7372,AnnotationStroke = new SolidBrush(Color.OrangeRed) });

            shapeLayer.Annotations.Add(new Annotation() { AnnotationLabel = "Africa", Latitude = 9.1021, Longitude = 18.2812, AnnotationStroke = new SolidBrush(Color.OrangeRed) });

            shapeLayer.Annotations.Add(new Annotation() { AnnotationLabel = "Europe", Latitude = 53.0000, Longitude = 9.0000, AnnotationStroke = new SolidBrush(Color.OrangeRed) });

            shapeLayer.Annotations.Add(new Annotation() { AnnotationLabel = "South America", Latitude = -19.6048, Longitude = -73.0625, AnnotationStroke = new SolidBrush(Color.OrangeRed) });

            shapeLayer.Annotations.Add(new Annotation() { AnnotationLabel = "Asia", Latitude = 49.8380, Longitude = 105.8203, AnnotationStroke = new SolidBrush(Color.OrangeRed) });

            shapeLayer.Annotations.Add(new Annotation() { AnnotationLabel = "Oceania", Latitude = -20.3456, Longitude = 120.4346, AnnotationStroke = new SolidBrush(Color.OrangeRed) });


            this.mapsControl1 .Layers.Add(shapeLayer);

         }

     }

Screenshot: