Determine the map's load status which can be: NotLoaded
, FailedToLoad
, Loading
, Loaded
.
Use case
Knowing the map's load state may be required before subsequent actions can be executed.
How to use the sample
The load status of the map will be displayed as the sample loads.
How it works
- Create a
Map
and add it to aMapView
. - Use the
Map.LoadStatusChanged
event to listen for changes in the map's load status.
The LoadStatus
is Loaded
when any of the following criteria are met:
- The map has a valid spatial reference.
- The map has an an initial viewpoint.
- One of the map's predefined layers has been created.
Relevant API
- ILoadable
- Map
- MapView
Tags
load status, loadable pattern, map
Sample Code
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.
using Esri.ArcGISRuntime;
using Esri.ArcGISRuntime.Mapping;
namespace ArcGIS.WinUI.Samples.AccessLoadStatus
{
[ArcGIS.Samples.Shared.Attributes.Sample(
name: "Map load status",
category: "Map",
description: "Determine the map's load status which can be: `NotLoaded`, `FailedToLoad`, `Loading`, `Loaded`.",
instructions: "The load status of the map will be displayed as the sample loads.",
tags: new[] { "load status", "loadable pattern", "map" })]
public sealed partial class AccessLoadStatus
{
public AccessLoadStatus()
{
InitializeComponent();
// Create the UI, setup the control references and execute initialization
Initialize();
}
private void Initialize()
{
// Create new Map with basemap
Map myMap = new Map(BasemapStyle.ArcGISImageryStandard);
// Register to handle loading status changes
myMap.LoadStatusChanged += OnMapsLoadStatusChanged;
// Provide used Map to the MapView
MyMapView.Map = myMap;
}
private void OnMapsLoadStatusChanged(object sender, LoadStatusEventArgs e)
{
// Update the load status information
DispatcherQueue.TryEnqueue(Microsoft.UI.Dispatching.DispatcherQueuePriority.Normal, () =>
{
LoadStatusTextBlock.Text = string.Format("Map's load status : {0}", e.Status.ToString());
});
}
}
}