layout: default title: MapView parent: Core Classes —
dymaptic.GeoBlazor.Core
dymaptic.GeoBlazor.Core.Components.Views
MapView Class
The Top-Level Map Component Container.
A MapView displays a 2D view of a Map instance. An instance of MapView must be created to render a Map (along with
its operational and base layers) in 2D. To render a map and its layers in 3D, see the documentation for SceneView.
For a general overview of views, see View.
ArcGIS Maps SDK for JavaScript
public class MapView : dymaptic.GeoBlazor.Core.Components.MapComponent
Inheritance System.Object 🡒 Microsoft.AspNetCore.Components.ComponentBase 🡒 MapComponent 🡒 MapView
Derived
↳ SceneView
Example
Properties
MapView.AllowDefaultEsriLogin Property
Allows maps to be rendered without an Api or OAuth Token, which will trigger a default esri login popup.
public System.Nullable<bool> AllowDefaultEsriLogin { get; set; }
Property Value
System.Nullable<System.Boolean>
MapView.AuthenticationManager Property
Handles OAuth authentication
public dymaptic.GeoBlazor.Core.Model.AuthenticationManager AuthenticationManager { get; set; }
Property Value
MapView.Center Property
The Center point of the view, equivalent to setting Latitude/Longitude
public dymaptic.GeoBlazor.Core.Components.Geometries.Point? Center { get; set; }
Property Value
MapView.Class Property
Inline html/css class selector for applying css
public string Class { get; set; }
Property Value
MapView.Configuration Property
A set of key/value application configuration properties, that can be populated from `appsettings.json, environment
variables, or other sources.
public Microsoft.Extensions.Configuration.IConfiguration Configuration { get; set; }
Property Value
Microsoft.Extensions.Configuration.IConfiguration
MapView.EventRateLimitInMilliseconds Property
Set this parameter to limit the rate at which recurring events are returned. Applies to OnDrag,
OnPointerMove, OnMouseWheel, OnResize, and
OnExtentChanged
public System.Nullable<int> EventRateLimitInMilliseconds { get; set; }
Property Value
MapView.ExtentChangedInJs Property
A boolean flag to indicate that the map extent has been modified in JavaScript, and therefore should not be
modifiable by markup until Refresh() is called
public bool ExtentChangedInJs { get; set; }
Property Value
MapView.Graphics Property
The collection of Graphics in the view. These are directly on the view itself, not in a
GraphicsLayer.
public System.Collections.Generic.IReadOnlyCollection<dymaptic.GeoBlazor.Core.Components.Layers.Graphic> Graphics { get; set; }
Property Value
System.Collections.Generic.IReadOnlyCollection<Graphic>
MapView.GraphicSerializationChunkSize Property
Optional setting to control the number of graphics that are serialized in a single chunk. Tuning this value might help with performance when adding large graphic sets.
public System.Nullable<int> GraphicSerializationChunkSize { get; set; }
Property Value
MapView.IsMaui Property
Boolean flag to identify if GeoBlazor is running in Blazor Hybrid (MAUI) mode
public bool IsMaui { get; }
Property Value
MapView.IsServer Property
Boolean flag to identify if GeoBlazor is running in Blazor Server mode
public bool IsServer { get; }
Property Value
MapView.IsWebAssembly Property
Boolean flag to identify if GeoBlazor is running in Blazor WebAssembly (client) mode
public bool IsWebAssembly { get; }
Property Value
MapView.Latitude Property
The Latitude for the Center point of the view
public System.Nullable<double> Latitude { get; set; }
Property Value
System.Nullable<System.Double>
MapView.LoadOnRender Property
Boolean flag that can be set to false to prevent the MapView from automatically rendering with the Blazor
components.
public bool LoadOnRender { get; set; }
Property Value
MapView.Longitude Property
The Longitude for the Center point of the view
public System.Nullable<double> Longitude { get; set; }
Property Value
System.Nullable<System.Double>
MapView.Map Property
An instance of a Map object to display in the view.
public virtual dymaptic.GeoBlazor.Core.Components.Map? Map { get; set; }
Property Value
MapView.OnBlur Property
Handler delegate for blur (lost focus) events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.BlurEvent> OnBlur { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<BlurEvent>
MapView.OnClick Property
Handler delegate for click events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.ClickEvent> OnClick { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<ClickEvent>
MapView.OnDoubleClick Property
Handler delegate for double-click events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.ClickEvent> OnDoubleClick { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<ClickEvent>
MapView.OnDrag Property
Handler delegate for pointer drag events on the view, returns a DragEvent.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.DragEvent> OnDrag { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<DragEvent>
Remarks
The real-time nature of this handler make it a challenge to use continuously over SignalR in Blazor Server.
In this scenario, you should write a custom JavaScript handler instead.
MapView.OnExtentChanged Property
Handler delegate for the view’s Extent changing.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Components.Geometries.Extent> OnExtentChanged { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<Extent>
MapView.OnFocus Property
Handler delegate for focus events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.FocusEvent> OnFocus { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<FocusEvent>
MapView.OnHold Property
Handler delegate for hold events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.ClickEvent> OnHold { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<ClickEvent>
MapView.OnImmediateClick Property
Handler delegate for immediate-click events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.ClickEvent> OnImmediateClick { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<ClickEvent>
MapView.OnImmediateDoubleClick Property
Handler delegate for immediate-double-click events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.ClickEvent> OnImmediateDoubleClick { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<ClickEvent>
MapView.OnJavascriptErrorHandler Property
Implement this handler in your calling code to catch and handle Javascript errors.
public System.Func<dymaptic.GeoBlazor.Core.Exceptions.JavascriptException,System.Threading.Tasks.Task>? OnJavascriptErrorHandler { get; set; }
Property Value
System.Func<JavascriptException,System.Threading.Tasks.Task>
MapView.OnKeyDown Property
Handler delegate for key-down events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.KeyDownEvent> OnKeyDown { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<KeyDownEvent>
Remarks
Fires after a keyboard key is pressed.
MapView.OnKeyUp Property
Handler delegate for key-up events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.KeyUpEvent> OnKeyUp { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<KeyUpEvent>
Remarks
Fires after a keyboard key is released.
MapView.OnLayerViewCreate Property
Fires after each layer in the map has a corresponding LayerView created and rendered in the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.LayerViewCreateEvent> OnLayerViewCreate { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<LayerViewCreateEvent>
MapView.OnLayerViewCreateError Property
Fires after a LayerView is destroyed and is no longer rendered in the view. This happens for example when a layer
is removed from the map of the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.LayerViewCreateErrorEvent> OnLayerViewCreateError { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<LayerViewCreateErrorEvent>
MapView.OnLayerViewDestroy Property
Fires after a LayerView is destroyed and is no longer rendered in the view. This happens for example when a layer
is removed from the map of the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.LayerViewDestroyEvent> OnLayerViewDestroy { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<LayerViewDestroyEvent>
MapView.OnMouseWheel Property
Handler delegate for the view’s Extent changing.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.MouseWheelEvent> OnMouseWheel { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<MouseWheelEvent>
MapView.OnPointerDown Property
Handler delegate for pointer down events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.PointerEvent> OnPointerDown { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<PointerEvent>
Remarks
Fires after a mouse button is pressed, or a finger touches the display.
MapView.OnPointerEnter Property
Handler delegate for pointer enter events on the view.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.PointerEvent> OnPointerEnter { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<PointerEvent>
Remarks
Fires after a mouse cursor enters the view, or a display touch begins.
MapView.OnPointerLeave Property
Handler delegate for pointer leave events on the view. Must take in a Point and return a
System.Threading.Tasks.Task.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.PointerEvent> OnPointerLeave { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<PointerEvent>
Remarks
Fires after a mouse cursor leaves the view, or a display touch ends.
MapView.OnPointerMove Property
Handler delegate for point move events on the view. Must take in a Point and return a
System.Threading.Tasks.Task.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.PointerEvent> OnPointerMove { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<PointerEvent>
Remarks
The real-time nature of this handler make it a challenge to use continuously over SignalR in Blazor Server.
In this scenario, you should write a custom JavaScript handler instead.
See
Display
Projection
code.
MapView.OnPointerUp Property
Handler delegate for pointer up events on the view. Must take in a Point and return a
System.Threading.Tasks.Task.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.PointerEvent> OnPointerUp { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<PointerEvent>
Remarks
Fires after a mouse button is released, or a display touch ends.
MapView.OnResize Property
Handler delegate for the view’s Extent changing.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Events.ResizeEvent> OnResize { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<ResizeEvent>
MapView.OnSpatialReferenceChanged Property
Handler delegate for the view’s Spatial Reference changing.
public Microsoft.AspNetCore.Components.EventCallback<dymaptic.GeoBlazor.Core.Components.Geometries.SpatialReference> OnSpatialReferenceChanged { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<SpatialReference>
MapView.OnViewInitialized Property
Event triggered when the JS view is created, but before the full map is rendered.
public Microsoft.AspNetCore.Components.EventCallback OnViewInitialized { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback
MapView.OnViewRendered Property
Handler delegate for when the map view is fully rendered. Must return a System.Threading.Tasks.Task.
public Microsoft.AspNetCore.Components.EventCallback<System.Guid> OnViewRendered { get; set; }
Property Value
Microsoft.AspNetCore.Components.EventCallback<System.Guid>
MapView.PromptForArcGISKey Property
Provides an override for the default behavior of requiring an API key. By setting to “false”, all calls to ArcGIS
services will trigger a sign-in popup.
public System.Nullable<bool> PromptForArcGISKey { get; set; }
Property Value
System.Nullable<System.Boolean>
Remarks
Setting this to “false” is the same as setting AllowDefaultEsriLogin to “true”. This is provided
simply for convenience of discovery.
MapView.PromptForOAuthLogin Property
If you set an AppId in your configuration, setting this to true will cause the app to attempt to auto-login
using ArcGIS OAuth.
public System.Nullable<bool> PromptForOAuthLogin { get; set; }
Property Value
System.Nullable<System.Boolean>
MapView.QueryResultsMaxSizeLimit Property
The maximum size of query results that will be returned in a stream. Note that setting this to a smaller
value might create errors in query returns.
public long QueryResultsMaxSizeLimit { get; set; }
Property Value
MapView.Rotation Property
The clockwise rotation of due north in relation to the top of the view in degrees.
public double Rotation { get; set; }
Property Value
MapView.Scale Property
Represents the map scale at the center of the view.
public System.Nullable<double> Scale { get; set; }
Property Value
System.Nullable<System.Double>
MapView.Style Property
Inline css styling attribute
public string Style { get; set; }
Property Value
MapView.Widgets Property
The collection of Widgets in the view.
public System.Collections.Generic.IReadOnlyCollection<dymaptic.GeoBlazor.Core.Components.Widgets.Widget> Widgets { get; set; }
Property Value
System.Collections.Generic.IReadOnlyCollection<Widget>
MapView.Zoom Property
Represents the level of detail (LOD) at the center of the view.
public System.Nullable<double> Zoom { get; set; }
Property Value
System.Nullable<System.Double>
Methods
MapView.AddGraphic(Graphic) Method
Adds a Graphic to the current view, or to a GraphicsLayer.
public System.Threading.Tasks.Task AddGraphic(dymaptic.GeoBlazor.Core.Components.Layers.Graphic graphic);
Parameters
graphic Graphic
The Graphic to add.
Returns
MapView.AddGraphics(IEnumerable, CancellationToken) Method
Adds a collection of Graphics to the current view
public System.Threading.Tasks.Task AddGraphics(System.Collections.Generic.IEnumerable<dymaptic.GeoBlazor.Core.Components.Layers.Graphic> graphics, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
Parameters
graphics System.Collections.Generic.IEnumerable<Graphic>
cancellationToken System.Threading.CancellationToken
Returns
MapView.AddLayer(Layer, bool) Method
Adds a layer to the current Map
public System.Threading.Tasks.Task AddLayer(dymaptic.GeoBlazor.Core.Components.Layers.Layer layer, bool isBasemapLayer=false);
Parameters
layer Layer
The layer to add
isBasemapLayer System.Boolean
If true, adds the layer as a Basemap. If there is no Basemap yet, one will be created.
Returns
MapView.AddWidget(Widget) Method
Adds a widget to the view.
public System.Threading.Tasks.Task AddWidget(dymaptic.GeoBlazor.Core.Components.Widgets.Widget widget);
Parameters
widget Widget
Returns
MapView.ClearGraphics() Method
Clears all graphics from the view.
public System.Threading.Tasks.Task ClearGraphics();
Returns
MapView.ClosePopup() Method
Closes the popup by setting its visible property to false. Users can alternatively close the popup by directly
setting the visible property to false.
public System.Threading.Tasks.Task ClosePopup();
Returns
MapView.DisposeAsync() Method
Implements the IAsyncDisposable pattern.
public override System.Threading.Tasks.ValueTask DisposeAsync();
Implements DisposeAsync()
Returns
System.Threading.Tasks.ValueTask
MapView.DrawRouteAndGetDirections(Symbol, string) Method
A custom method to set up the interaction for clicking a start and end point, and have the view render a driving
route. Also returns a set of Directions for display.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Objects.Direction[]> DrawRouteAndGetDirections(dymaptic.GeoBlazor.Core.Components.Symbols.Symbol routeSymbol, string routeUrl);
Parameters
routeSymbol Symbol
The Symbol used to render the route.
routeUrl System.String
A routing service url for calculating the route.
Returns
System.Threading.Tasks.Task<Direction[]>
A collection of Direction steps to follow the route.
MapView.FindPlaces(AddressQuery, Symbol, PopupTemplate) Method
A custom method to run an AddressQuery against the current view, and display the results.
public System.Threading.Tasks.Task FindPlaces(dymaptic.GeoBlazor.Core.Objects.AddressQuery query, dymaptic.GeoBlazor.Core.Components.Symbols.Symbol displaySymbol, dymaptic.GeoBlazor.Core.Components.Popups.PopupTemplate popupTemplate);
Parameters
query AddressQuery
The AddressQuery to run.
displaySymbol Symbol
The Symbol to use to render the results of the query.
popupTemplate PopupTemplate
A PopupTemplate for displaying Popups on rendered results.
Returns
MapView.GetCenter() Method
Returns the center Point of the current view extent.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Point?> GetCenter();
Returns
System.Threading.Tasks.Task<Point>
MapView.GetCursor() Method
Returns the current cursor when hovering over the view.
public System.Threading.Tasks.Task<string> GetCursor();
Returns
System.Threading.Tasks.Task<System.String>
MapView.GetDotNetPopupTemplateObjectReference(Guid) Method
For internal use only, this looks up a missing dymaptic.GeoBlazor.Core.Components.Views.MapView.DotNetObjectReference for a PopupTemplate
and returns it to JavaScript.
public Microsoft.JSInterop.DotNetObjectReference<dymaptic.GeoBlazor.Core.Components.Popups.PopupTemplate>? GetDotNetPopupTemplateObjectReference(System.Guid popupTemplateId);
Parameters
popupTemplateId System.Guid
Returns
Microsoft.JSInterop.DotNetObjectReference<PopupTemplate>
MapView.GetExtent() Method
Returns the current dymaptic.GeoBlazor.Core.Components.Views.MapView.Extent of the view.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Extent?> GetExtent();
Returns
System.Threading.Tasks.Task<Extent>
MapView.GetId() Method
JS-Invokable method to generate a new GUID Id
public string GetId();
Returns
MapView.GetPopupWidget() Method
Retrieves the Popup Widget for the view.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Widgets.PopupWidget?> GetPopupWidget();
Returns
System.Threading.Tasks.Task<PopupWidget>
MapView.GetRotation() Method
Returns the rotation of the current view.
public System.Threading.Tasks.Task<System.Nullable<double>> GetRotation();
Returns
System.Threading.Tasks.Task<System.Nullable<System.Double>>
MapView.GetScale() Method
Returns the scale of the current view.
public System.Threading.Tasks.Task<System.Nullable<double>> GetScale();
Returns
System.Threading.Tasks.Task<System.Nullable<System.Double>>
MapView.GetSpatialReference() Method
Returns the current dymaptic.GeoBlazor.Core.Components.Views.MapView.SpatialReference of the view.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.SpatialReference?> GetSpatialReference();
Returns
System.Threading.Tasks.Task<SpatialReference>
MapView.GetZoom() Method
Returns the zoom level of the current view.
public System.Threading.Tasks.Task<System.Nullable<double>> GetZoom();
Returns
System.Threading.Tasks.Task<System.Nullable<System.Double>>
MapView.GoTo(Extent) Method
Changes the view dymaptic.GeoBlazor.Core.Components.Views.MapView.Extent and redraws.
public System.Threading.Tasks.Task GoTo(dymaptic.GeoBlazor.Core.Components.Geometries.Extent extent);
Parameters
extent Extent
The new dymaptic.GeoBlazor.Core.Components.Views.MapView.Extent of the view.
Returns
MapView.GoTo(IEnumerable) Method
Changes the view dymaptic.GeoBlazor.Core.Components.Views.MapView.Extent and redraws.
public virtual System.Threading.Tasks.Task GoTo(System.Collections.Generic.IEnumerable<dymaptic.GeoBlazor.Core.Components.Layers.Graphic> graphics);
Parameters
graphics System.Collections.Generic.IEnumerable<Graphic>
The Graphics to zoom to.
Returns
MapView.HitTest(Point, HitTestOptions) Method
Returns HitTestResults from each layer that intersects the specified screen coordinates. The results
are organized as an array of objects containing different result types.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Events.HitTestResult> HitTest(dymaptic.GeoBlazor.Core.Components.Geometries.Point mapPoint, dymaptic.GeoBlazor.Core.Events.HitTestOptions? options=null);
Parameters
mapPoint Point
The map point, in the same projection as the map, to check for hits.
options HitTestOptions
Options to specify what is included in or excluded from the hitTest.
Returns
System.Threading.Tasks.Task<HitTestResult>
MapView.HitTest(ClickEvent, HitTestOptions) Method
Returns HitTestResults from each layer that intersects the specified screen coordinates. The results
are organized as an array of objects containing different result types.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Events.HitTestResult> HitTest(dymaptic.GeoBlazor.Core.Events.ClickEvent clickEvent, dymaptic.GeoBlazor.Core.Events.HitTestOptions? options=null);
Parameters
clickEvent ClickEvent
The click event to test for hits.
options HitTestOptions
Options to specify what is included in or excluded from the hitTest.
Returns
System.Threading.Tasks.Task<HitTestResult>
MapView.HitTest(PointerEvent, HitTestOptions) Method
Returns HitTestResults from each layer that intersects the specified screen coordinates. The results
are organized as an array of objects containing different result types.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Events.HitTestResult> HitTest(dymaptic.GeoBlazor.Core.Events.PointerEvent pointerEvent, dymaptic.GeoBlazor.Core.Events.HitTestOptions? options=null);
Parameters
pointerEvent PointerEvent
The pointer event to test for hits.
options HitTestOptions
Options to specify what is included in or excluded from the hitTest.
Returns
System.Threading.Tasks.Task<HitTestResult>
MapView.HitTest(ScreenPoint, HitTestOptions) Method
Returns HitTestResults from each layer that intersects the specified screen coordinates. The results
are organized as an array of objects containing different result types.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Events.HitTestResult> HitTest(dymaptic.GeoBlazor.Core.Events.ScreenPoint screenPoint, dymaptic.GeoBlazor.Core.Events.HitTestOptions? options=null);
Parameters
screenPoint ScreenPoint
The screen point to check for hits.
options HitTestOptions
Options to specify what is included in or excluded from the hitTest.
Returns
System.Threading.Tasks.Task<HitTestResult>
MapView.Load() Method
Manually loads and renders the MapView, if the consumer has also set LoadOnRender to false.
If LoadOnRender is true, this method will function the same as Refresh().
public void Load();
MapView.OnHitTestStreamCallback(IJSStreamReference, Guid) Method
Internal use callback from JavaScript
public System.Threading.Tasks.Task OnHitTestStreamCallback(Microsoft.JSInterop.IJSStreamReference streamReference, System.Guid hitTestId);
Parameters
streamReference Microsoft.JSInterop.IJSStreamReference
hitTestId System.Guid
Returns
MapView.OnJavascriptBlur(BlurEvent) Method
JS-Invokable method to return view blur (lost focus) events.
public System.Threading.Tasks.Task OnJavascriptBlur(dymaptic.GeoBlazor.Core.Events.BlurEvent blurEvent);
Parameters
blurEvent BlurEvent
The BlurEvent return meta object.
Returns
MapView.OnJavascriptClick(ClickEvent) Method
JS-Invokable method to return view clicks.
public System.Threading.Tasks.Task OnJavascriptClick(dymaptic.GeoBlazor.Core.Events.ClickEvent clickEvent);
Parameters
clickEvent ClickEvent
The ClickEvent return meta object.
Returns
Remarks
Fires after a user clicks on the view. This event emits slightly slower than an immediate-click event to make sure
that a double-click event isn’t triggered instead. The immediate-click event can be used for responding to a click
event without delay.
MapView.OnJavascriptDoubleClick(ClickEvent) Method
JS-Invokable method to return view double-clicks.
public System.Threading.Tasks.Task OnJavascriptDoubleClick(dymaptic.GeoBlazor.Core.Events.ClickEvent clickEvent);
Parameters
clickEvent ClickEvent
The ClickEvent return meta object.
Returns
MapView.OnJavascriptDrag(DragEvent) Method
JS-Invokable method to return view drag events.
public System.Threading.Tasks.Task OnJavascriptDrag(dymaptic.GeoBlazor.Core.Events.DragEvent dragEvent);
Parameters
dragEvent DragEvent
The DragEvent return meta object.
Returns
MapView.OnJavascriptError(JavascriptError) Method
Surfaces JavaScript errors to the .NET Code for debugging.
public void OnJavascriptError(dymaptic.GeoBlazor.Core.Exceptions.JavascriptError error);
Parameters
error JavascriptError
The original Javascript error.
Exceptions
JavascriptException
Wraps the JS Error and throws a .NET Exception.
MapView.OnJavascriptExtentChanged(Extent, Point, double, double, Nullable, Nullable) Method
JS-Invokable method to return when the map view Extent changes.
public virtual System.Threading.Tasks.Task OnJavascriptExtentChanged(dymaptic.GeoBlazor.Core.Components.Geometries.Extent extent, dymaptic.GeoBlazor.Core.Components.Geometries.Point? center, double zoom, double scale, System.Nullable<double> rotation=null, System.Nullable<double> tilt=null);
Parameters
extent Extent
center Point
zoom System.Double
scale System.Double
rotation System.Nullable<System.Double>
tilt System.Nullable<System.Double>
Returns
MapView.OnJavascriptFocus(FocusEvent) Method
JS-Invokable method to return view focus events.
public System.Threading.Tasks.Task OnJavascriptFocus(dymaptic.GeoBlazor.Core.Events.FocusEvent focusEvent);
Parameters
focusEvent FocusEvent
The FocusEvent return meta object.
Returns
MapView.OnJavascriptHitTestResult(Guid, string) Method
The callback method for returning a chunk of data from a Blazor Server hit test.
public void OnJavascriptHitTestResult(System.Guid eventId, string chunk);
Parameters
eventId System.Guid
The hit test event id.
chunk System.String
A chunk of hit test data, to be combined with other data before deserialization.
MapView.OnJavascriptHold(ClickEvent) Method
JS-Invokable method to return view hold events.
public System.Threading.Tasks.Task OnJavascriptHold(dymaptic.GeoBlazor.Core.Events.ClickEvent holdEvent);
Parameters
holdEvent ClickEvent
The ClickEvent return meta object.
Returns
MapView.OnJavascriptImmediateClick(ClickEvent) Method
JS-Invokable method to return view immediate-clicks.
public System.Threading.Tasks.Task OnJavascriptImmediateClick(dymaptic.GeoBlazor.Core.Events.ClickEvent clickEvent);
Parameters
clickEvent ClickEvent
The ClickEvent return meta object.
Returns
MapView.OnJavascriptImmediateDoubleClick(ClickEvent) Method
JS-Invokable method to return view immediate-double-clicks.
public System.Threading.Tasks.Task OnJavascriptImmediateDoubleClick(dymaptic.GeoBlazor.Core.Events.ClickEvent clickEvent);
Parameters
clickEvent ClickEvent
The ClickEvent return meta object.
Returns
MapView.OnJavascriptKeyDown(KeyDownEvent) Method
JS-Invokable method to return view key-down events.
public System.Threading.Tasks.Task OnJavascriptKeyDown(dymaptic.GeoBlazor.Core.Events.KeyDownEvent keyDownEvent);
Parameters
keyDownEvent KeyDownEvent
The KeyDownEvent return meta object.
Returns
MapView.OnJavascriptKeyUp(KeyUpEvent) Method
JS-Invokable method to return view key-up events.
public System.Threading.Tasks.Task OnJavascriptKeyUp(dymaptic.GeoBlazor.Core.Events.KeyUpEvent keyUpEvent);
Parameters
keyUpEvent KeyUpEvent
The KeyUpEvent return meta object.
Returns
MapView.OnJavascriptLayerCreateChunk(string, string, int) Method
JS-Invokable method for internal use only.
public void OnJavascriptLayerCreateChunk(string layerUid, string chunk, int chunkIndex);
Parameters
layerUid System.String
chunk System.String
chunkIndex System.Int32
MapView.OnJavascriptLayerViewCreate(LayerViewCreateInternalEvent) Method
JS-Invokable method to return when a layer view is created.
public System.Threading.Tasks.Task OnJavascriptLayerViewCreate(dymaptic.GeoBlazor.Core.Events.LayerViewCreateInternalEvent layerViewCreateEvent);
Parameters
layerViewCreateEvent LayerViewCreateInternalEvent
The new LayerViewCreateEvent
Returns
MapView.OnJavascriptLayerViewCreateChunk(string, string, int) Method
JS-Invokable method for internal use only.
public void OnJavascriptLayerViewCreateChunk(string layerUid, string chunk, int chunkIndex);
Parameters
layerUid System.String
chunk System.String
chunkIndex System.Int32
MapView.OnJavascriptLayerViewCreateComplete(Nullable, string, IJSObjectReference, IJSObjectReference, bool) Method
JS-Invokable method for internal use only.
public System.Threading.Tasks.Task OnJavascriptLayerViewCreateComplete(System.Nullable<System.Guid> geoBlazorLayerId, string layerUid, Microsoft.JSInterop.IJSObjectReference layerRef, Microsoft.JSInterop.IJSObjectReference layerViewRef, bool isBasemapLayer);
Parameters
geoBlazorLayerId System.Nullable<System.Guid>
layerUid System.String
layerRef Microsoft.JSInterop.IJSObjectReference
layerViewRef Microsoft.JSInterop.IJSObjectReference
isBasemapLayer System.Boolean
Returns
MapView.OnJavascriptLayerViewCreateError(LayerViewCreateErrorEvent) Method
JS-Invokable method to return when a layer view is destroyed.
public System.Threading.Tasks.Task OnJavascriptLayerViewCreateError(dymaptic.GeoBlazor.Core.Events.LayerViewCreateErrorEvent errorEvent);
Parameters
errorEvent LayerViewCreateErrorEvent
Returns
MapView.OnJavascriptLayerViewDestroy(LayerViewDestroyEvent) Method
JS-Invokable method to return when a layer view is destroyed.
public System.Threading.Tasks.Task OnJavascriptLayerViewDestroy(dymaptic.GeoBlazor.Core.Events.LayerViewDestroyEvent layerViewDestroyEvent);
Parameters
layerViewDestroyEvent LayerViewDestroyEvent
The destroyed LayerViewDestroyEvent
Returns
MapView.OnJavascriptMouseWheel(MouseWheelEvent) Method
JS-Invokable method to return when the mouse wheel is scrolled.
public System.Threading.Tasks.Task OnJavascriptMouseWheel(dymaptic.GeoBlazor.Core.Events.MouseWheelEvent mouseWheelEvent);
Parameters
mouseWheelEvent MouseWheelEvent
Returns
MapView.OnJavascriptPointerDown(PointerEvent) Method
JS-Invokable method to return view pointer down events.
public System.Threading.Tasks.Task OnJavascriptPointerDown(dymaptic.GeoBlazor.Core.Events.PointerEvent pointerEvent);
Parameters
pointerEvent PointerEvent
The PointerEvent return meta object.
Returns
MapView.OnJavascriptPointerEnter(PointerEvent) Method
JS-Invokable method to return view pointer enter events.
public System.Threading.Tasks.Task OnJavascriptPointerEnter(dymaptic.GeoBlazor.Core.Events.PointerEvent pointerEvent);
Parameters
pointerEvent PointerEvent
The PointerEvent return meta object.
Returns
MapView.OnJavascriptPointerLeave(PointerEvent) Method
JS-Invokable method to return view pointer leave events.
public System.Threading.Tasks.Task OnJavascriptPointerLeave(dymaptic.GeoBlazor.Core.Events.PointerEvent pointerEvent);
Parameters
pointerEvent PointerEvent
The PointerEvent return meta object.
Returns
MapView.OnJavascriptPointerMove(PointerEvent) Method
JS-Invokable method to return view pointer movement.
public System.Threading.Tasks.Task OnJavascriptPointerMove(dymaptic.GeoBlazor.Core.Events.PointerEvent pointerEvent);
Parameters
pointerEvent PointerEvent
The PointerEvent return meta object.
Returns
MapView.OnJavascriptPointerUp(PointerEvent) Method
JS-Invokable method to return view pointer up events.
public System.Threading.Tasks.Task OnJavascriptPointerUp(dymaptic.GeoBlazor.Core.Events.PointerEvent pointerEvent);
Parameters
pointerEvent PointerEvent
The PointerEvent return meta object.
Returns
MapView.OnJavascriptResize(ResizeEvent) Method
JS-Invokable method to return when the map view is resized in the window.
public System.Threading.Tasks.Task OnJavascriptResize(dymaptic.GeoBlazor.Core.Events.ResizeEvent resizeEvent);
Parameters
resizeEvent ResizeEvent
Returns
MapView.OnJavascriptSpatialReferenceChanged(SpatialReference) Method
JS-Invokable method to return when the map view Spatial Reference changes.
public System.Threading.Tasks.Task OnJavascriptSpatialReferenceChanged(dymaptic.GeoBlazor.Core.Components.Geometries.SpatialReference spatialReference);
Parameters
spatialReference SpatialReference
The new dymaptic.GeoBlazor.Core.Components.Views.MapView.SpatialReference
Returns
MapView.OnJsViewInitialized() Method
JS-Invokable callback that signifies when the view is created but not yet fully rendered.
public System.Threading.Tasks.Task OnJsViewInitialized();
Returns
MapView.OnJsViewRendered() Method
JS-Invokable method to return when the map view is fully rendered.
public System.Threading.Tasks.Task OnJsViewRendered();
Returns
MapView.OpenPopup(PopupOpenOptions) Method
Opens the popup at the given location with content defined either explicitly with content or driven from the
PopupTemplate of input features. This method sets the popup’s visible property to true. Users can alternatively
open the popup by directly setting the visible property to true.
public System.Threading.Tasks.Task OpenPopup(dymaptic.GeoBlazor.Core.Components.Widgets.PopupOpenOptions? options=null);
Parameters
options PopupOpenOptions
Defines the location and content of the popup when opened.
Returns
MapView.QueryFeatures(Query, FeatureLayer, Symbol, PopupTemplate) Method
A custom method to query a provided FeatureLayer on the current map view, and display the results.
public System.Threading.Tasks.Task QueryFeatures(dymaptic.GeoBlazor.Core.Objects.Query query, dymaptic.GeoBlazor.Core.Components.Layers.FeatureLayer featureLayer, dymaptic.GeoBlazor.Core.Components.Symbols.Symbol displaySymbol, dymaptic.GeoBlazor.Core.Components.Popups.PopupTemplate popupTemplate);
Parameters
query Query
The Query to run.
featureLayer FeatureLayer
The FeatureLayer to query against.
displaySymbol Symbol
The Symbol to use to render the results of the query.
popupTemplate PopupTemplate
A PopupTemplate for displaying Popups on rendered results.
Returns
MapView.Refresh() Method
Provides a way to externally call StateHasChanged on the component.
public override void Refresh();
MapView.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
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.
MapView.RemoveGraphic(Graphic) Method
Removes a graphic from the current view.
public System.Threading.Tasks.Task RemoveGraphic(dymaptic.GeoBlazor.Core.Components.Layers.Graphic graphic);
Parameters
graphic Graphic
The Graphic to remove.
Returns
MapView.RemoveGraphics(IEnumerable) Method
Removes a collection of graphics from the current view.
public System.Threading.Tasks.Task RemoveGraphics(System.Collections.Generic.IEnumerable<dymaptic.GeoBlazor.Core.Components.Layers.Graphic> graphics);
Parameters
graphics System.Collections.Generic.IEnumerable<Graphic>
The Graphics to remove.
Returns
MapView.RemoveLayer(Layer, bool) Method
Removes a layer from the current Map
public System.Threading.Tasks.Task RemoveLayer(dymaptic.GeoBlazor.Core.Components.Layers.Layer layer, bool isBasemapLayer=false);
Parameters
layer Layer
The layer to remove
isBasemapLayer System.Boolean
If true, removes the layer as a Basemap
Returns
MapView.RemoveWidget(Widget) Method
Removes a widget from the view.
public System.Threading.Tasks.Task RemoveWidget(dymaptic.GeoBlazor.Core.Components.Widgets.Widget widget);
Parameters
widget Widget
Returns
MapView.SetCenter(Point) Method
Sets the center Point of the current view.
public virtual System.Threading.Tasks.Task SetCenter(dymaptic.GeoBlazor.Core.Components.Geometries.Point point);
Parameters
point Point
Returns
MapView.SetConstraints(Constraints) Method
Sets the dymaptic.GeoBlazor.Core.Components.Views.MapView.Constraints of the view.
public System.Threading.Tasks.Task SetConstraints(dymaptic.GeoBlazor.Core.Components.Constraints constraints);
Parameters
constraints Constraints
Returns
MapView.SetCursor(string) Method
Sets the cursor for the view.
public System.Threading.Tasks.Task SetCursor(string cursor);
Parameters
cursor System.String
Returns
MapView.SetExtent(Extent) Method
Sets the dymaptic.GeoBlazor.Core.Components.Views.MapView.Extent of the view.
public virtual System.Threading.Tasks.Task SetExtent(dymaptic.GeoBlazor.Core.Components.Geometries.Extent extent);
Parameters
extent Extent
Returns
MapView.SetHighlightOptions(HighlightOptions) Method
Sets the dymaptic.GeoBlazor.Core.Components.Views.MapView.HighlightOptions of the view.
public System.Threading.Tasks.Task SetHighlightOptions(dymaptic.GeoBlazor.Core.Objects.HighlightOptions highlightOptions);
Parameters
highlightOptions HighlightOptions
Returns
MapView.SetRotation(double) Method
Sets the rotation of the current view.
public System.Threading.Tasks.Task SetRotation(double rotation);
Parameters
rotation System.Double
Returns
MapView.SetScale(double) Method
Sets the scale of the current view.
public virtual System.Threading.Tasks.Task SetScale(double scale);
Parameters
scale System.Double
Returns
MapView.SetSpatialReference(SpatialReference) Method
Sets the dymaptic.GeoBlazor.Core.Components.Views.MapView.SpatialReference of the view.
public System.Threading.Tasks.Task SetSpatialReference(dymaptic.GeoBlazor.Core.Components.Geometries.SpatialReference spatialReference);
Parameters
spatialReference SpatialReference
Returns
MapView.SetZoom(double) Method
Sets the zoom level of the current view.
public virtual System.Threading.Tasks.Task SetZoom(double zoom);
Parameters
zoom System.Double
Returns
MapView.ShowPopup(PopupTemplate, Point) Method
Opens a Popup on a particular Point of the map view.
public System.Threading.Tasks.Task ShowPopup(dymaptic.GeoBlazor.Core.Components.Popups.PopupTemplate template, dymaptic.GeoBlazor.Core.Components.Geometries.Point location);
Parameters
template PopupTemplate
The PopupTemplate defining the Popup.
location Point
The Point on which to display the Popup.
Returns
MapView.ShowPopupWithGraphic(Graphic, PopupOptions) Method
Opens a Popup with a custom Graphic on a particular Point of the map view.
public System.Threading.Tasks.Task ShowPopupWithGraphic(dymaptic.GeoBlazor.Core.Components.Layers.Graphic graphic, dymaptic.GeoBlazor.Core.Components.Widgets.PopupOptions options);
Parameters
graphic Graphic
The Graphic to display in the Popup
options PopupOptions
A set of PopupOptions that define the position and visible elements of the Popup.
Returns
MapView.SolveServiceArea(string, double[], Symbol) Method
A custom method to find and display Service Areas around a given point.
public System.Threading.Tasks.Task SolveServiceArea(string serviceAreaUrl, double[] driveTimeCutOffs, dymaptic.GeoBlazor.Core.Components.Symbols.Symbol serviceAreaSymbol);
Parameters
serviceAreaUrl System.String
A url for a Service Area rest service.
driveTimeCutOffs System.Double[]
A collection of drivable distances, calculated in minutes
serviceAreaSymbol Symbol
The Symbol used to render the service areas.
Returns
MapView.ToMap(ScreenPoint) Method
Converts the given screen point to a map point. The screen point represents a point in terms of pixels relative to the top-left corner of the view.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Point> ToMap(dymaptic.GeoBlazor.Core.Events.ScreenPoint screenPoint);
Parameters
screenPoint ScreenPoint
Returns
System.Threading.Tasks.Task<Point>
MapView.ToScreen(Point) Method
Converts the given map point to a screen point. The screen point represents a point in terms of pixels relative to the top-left corner of the view.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Events.ScreenPoint> ToScreen(dymaptic.GeoBlazor.Core.Components.Geometries.Point mapPoint);
Parameters
mapPoint Point
Returns
System.Threading.Tasks.Task<ScreenPoint>
MapView.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
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.