layout: default title: UniqueValueRenderer parent: Core Classes —

dymaptic.GeoBlazor.Core

dymaptic.GeoBlazor.Core.Components.Renderers

UniqueValueRenderer Class

UniqueValueRenderer allows you to symbolize features in a Layer based on one or more matching string attributes.
This is typically done by using unique colors, fill styles, or images to represent features with equal values in a
string field.
ArcGIS Maps SDK for JavaScript

public class UniqueValueRenderer : dymaptic.GeoBlazor.Core.Components.Renderers.Renderer

Inheritance System.Object 🡒 Microsoft.AspNetCore.Components.ComponentBase 🡒 MapComponent 🡒 LayerObject 🡒 Renderer 🡒 UniqueValueRenderer

Properties

UniqueValueRenderer.DefaultLabel Property

Label used in the Legend to describe features assigned the default symbol.

public string? DefaultLabel { get; set; }

Property Value

System.String

UniqueValueRenderer.DefaultSymbol Property

The default symbol used to draw a feature whose value is not matched or specified by the renderer.

public dymaptic.GeoBlazor.Core.Components.Symbols.Symbol? DefaultSymbol { get; }

Property Value

Symbol

UniqueValueRenderer.Field Property

The name of the attribute field the renderer uses to match unique values or types.

public string? Field { get; set; }

Property Value

System.String

UniqueValueRenderer.LegendOptions Property

An object providing options for displaying the renderer in the Legend.

public dymaptic.GeoBlazor.Core.Components.Renderers.UniqueValueRendererLegendOptions? LegendOptions { get; set; }

Property Value

UniqueValueRendererLegendOptions

UniqueValueRenderer.RendererType Property

The subclass Renderer type

public override dymaptic.GeoBlazor.Core.Components.Renderers.RendererType RendererType { get; }

Property Value

RendererType

UniqueValueRenderer.UniqueValueInfos Property

Each element in the array is an object that provides information about a unique value associated with the renderer.

public System.Collections.Generic.HashSet<dymaptic.GeoBlazor.Core.Components.Renderers.UniqueValueInfo> UniqueValueInfos { get; set; }

Property Value

System.Collections.Generic.HashSet<UniqueValueInfo>

Methods

UniqueValueRenderer.RegisterChildComponent(MapComponent) Method

Called from dymaptic.GeoBlazor.Core.Components.MapComponent.OnInitializedAsync to “Register” the current component with it’s parent.

public override System.Threading.Tasks.Task RegisterChildComponent(dymaptic.GeoBlazor.Core.Components.MapComponent child);

Parameters

child MapComponent

The calling, child component to register

Returns

System.Threading.Tasks.Task

Exceptions

InvalidChildElementException
Throws if the current child is not a valid sub-component to the parent.

Remarks

This method is an implementation detail and should not be called directly by consumers. In future versions, this may be changed to an internal method. If you see no other way to register a child component, please open an issue on GitHub.

UniqueValueRenderer.UnregisterChildComponent(MapComponent) Method

Undoes the “Registration” of a child with its parent.

public override System.Threading.Tasks.Task UnregisterChildComponent(dymaptic.GeoBlazor.Core.Components.MapComponent child);

Parameters

child MapComponent

The child to unregister

Returns

System.Threading.Tasks.Task

Remarks

This method is an implementation detail and should not be called directly by consumers. In future versions, this may be changed to an internal method.