layout: default title: ExpressionInfo parent: Core Classes —
dymaptic.GeoBlazor.Core
dymaptic.GeoBlazor.Core.Components.Popups
ExpressionInfo Class
The ExpressionInfo class references Arcade expressions following the specification defined by the Arcade Popup
Profile. Expressions must return a string or a number and may access data values from the feature, its layer, or
other layers in the map or datastore with the $feature, $layer, $map, and $datastore profile variables.
Expression names are referenced in a layer’s PopupTemplate and execute once a layer’s popup is opened. The values
display within the view’s popup as if they are field values. They can be displayed in a table using the FieldInfo
of the popupTemplate’s content or referenced within a simple string.
ArcGIS Maps SDK for JavaScript
public class ExpressionInfo : dymaptic.GeoBlazor.Core.Components.MapComponent
Inheritance System.Object 🡒 Microsoft.AspNetCore.Components.ComponentBase 🡒 MapComponent 🡒 ExpressionInfo
Constructors
ExpressionInfo() Constructor
Parameterless constructor for using as a razor component
public ExpressionInfo();
ExpressionInfo(string, string, string, Nullable) Constructor
Constructor for creating a new ExpressionInfo in code with parameters
public ExpressionInfo(string? expression, string? name, string? title, System.Nullable<dymaptic.GeoBlazor.Core.Components.Popups.ReturnType> returnType);
Parameters
expression System.String
An Arcade expression following the specification defined by the Arcade Popup Profile. Expressions must return a
name System.String
The name of the expression. This is used to reference the value of the given expression in the popupTemplate’s
title System.String
The title used to describe the value returned by the expression in the popup. This will display if the value is
returnType System.Nullable<ReturnType>
Indicates the return type of the Arcade expression.
Properties
ExpressionInfo.Expression Property
An Arcade expression following the specification defined by the Arcade Popup Profile. Expressions must return a
string or a number and may access data values from the feature, its layer, or other layers in the map or datastore
with the $feature, $layer, $map, and $datastore profile variables.
public string? Expression { get; set; }
Property Value
ExpressionInfo.Name Property
The name of the expression. This is used to reference the value of the given expression in the popupTemplate’s
content property by wrapping it in curly braces and prefacing it with expression/ (e.g.
{expression/expressionName}).
public string? Name { get; set; }
Property Value
ExpressionInfo.ReturnType Property
Indicates the return type of the Arcade expression.
public System.Nullable<dymaptic.GeoBlazor.Core.Components.Popups.ReturnType> ReturnType { get; set; }
Property Value
ExpressionInfo.Title Property
The title used to describe the value returned by the expression in the popup. This will display if the value is
referenced in a FieldInfo table.
public string? Title { get; set; }