Adding Legends | ComponentOne Maps for WinForms

Adding Legends

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With C1Map, you can add legends to describe the vector elements and markers on a map. Legends can be displayed on a map using MapLegend class. On adding a Legend, you are required to add the legend items on it which can be displayed using MapLegendItem class. The following code can be used to add and customize the legend and legend items on a map:

Visual Basic
C#

Visual Basic

C1Map1.TileLayer.TileSource = New VirtualEarthRoadSource()

Dim legend = New C1.Win.Map.MapLegend()
C1Map1.Legends.Add(legend)
legend.Alignment = ContentAlignment.TopRight
legend.Margin = New Padding(0, 20, 20, 0)
legend.Padding = New Padding(5)
legend.Layout = MapLegendLayout.Column
legend.Style.Border.Width = 1

legend.Title.Caption = "LEGEND"
legend.Title.Position = DockStyle.Top
legend.Title.Padding = New Padding(5)
legend.Title.Style.Alignment = ContentAlignment.MiddleCenter
legend.Title.Style.Font = New Font("Arial", 12, FontStyle.Bold)

Dim item1 = New C1.Win.Map.MapLegendItem()
legend.Items.Add(item1)
item1.Label = "Item1"
item1.Kind = MapLegendItemKind.Marker
item1.Shape = MarkerShape.Circle
item1.Style.BackColor = Color.Blue

Dim item2 = New C1.Win.Map.MapLegendItem()
legend.Items.Add(item2)
item2.Kind = MapLegendItemKind.Rectangle
item2.Label = "Item2"
item2.Size = New SizeF(20, 20)
item2.Style.Alignment = ContentAlignment.MiddleLeft

c1Map1.TileLayer.TileSource = new VirtualEarthRoadSource();

var legend = new C1.Win.Map.MapLegend();
c1Map1.Legends.Add(legend);
legend.Alignment = ContentAlignment.TopRight;
legend.Margin = new Padding(0, 20, 20, 0);
legend.Padding = new Padding(5);
legend.Layout = MapLegendLayout.Column;
legend.Style.Border.Width = 1;

legend.Title.Caption = "LEGEND";
legend.Title.Position = DockStyle.Top;
legend.Title.Padding = new Padding(5);
legend.Title.Style.Alignment = ContentAlignment.MiddleCenter;
legend.Title.Style.Font = new Font("Arial", 12, FontStyle.Bold);

var item1 = new C1.Win.Map.MapLegendItem();
legend.Items.Add(item1);
item1.Label = "Item1";
item1.Kind = MapLegendItemKind.Marker;
item1.Shape = MarkerShape.Circle;
item1.Style.BackColor = Color.Blue;

var item2 = new C1.Win.Map.MapLegendItem();
legend.Items.Add(item2);
item2.Kind = MapLegendItemKind.Rectangle;
item2.Label = "Item2";
item2.Size = new SizeF(20, 20);
item2.Style.Alignment = ContentAlignment.MiddleLeft;

map with legend

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