View inWPFWinUIMAUIUWPView on GitHubSample viewer app
Take a screenshot of the map.
Use case
GIS users may want to export a screenshot of a map to enable sharing as an image or printing.
How to use the sample
Pan and zoom to find an interesting location, then use the button to take a screenshot. The screenshot will be displayed. Note that there may be a small delay if the map is still rendering when you push the button.
How it works
Wait for the MapView to finish rendering the Map.
Call mapView.ExportImageAsync() to get the RuntimeImage, which is a bitmap image.
Use the RuntimeImage.ToImageSourceAsync extension method to get a copy of the image that is compatible with native image display controls.
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// Copyright 2018 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.Mapping;
using Esri.ArcGISRuntime.UI;
using Esri.ArcGISRuntime.UI.Controls;
using System;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
namespaceArcGIS.WPF.Samples.TakeScreenshot{
[ArcGIS.Samples.Shared.Attributes.Sample(
name: "Take screenshot",
category: "MapView",
description: "Take a screenshot of the map.",
instructions: "Pan and zoom to find an interesting location, then use the button to take a screenshot. The screenshot will be displayed. Note that there may be a small delay if the map is still rendering when you push the button.",
tags: new[] { "capture", "export", "image", "print", "screen capture", "screenshot", "share", "shot" })]
publicpartialclassTakeScreenshot {
publicTakeScreenshot() {
InitializeComponent();
Initialize();
}
privatevoidInitialize() {
// Show an imagery basemap. MyMapView.Map = new Map(BasemapStyle.ArcGISImageryStandard);
}
privateasyncvoidOnScreenshotButtonClicked(object sender, RoutedEventArgs e) {
try {
// Wait for rendering to finish before taking the screenshot.await WaitForRenderCompleteAsync(MyMapView);
// Export the image from MapView. RuntimeImage image = await MyMapView.ExportImageAsync();
// Display the image in the UI. ImageView.Source = await image.ToImageSourceAsync();
// Make the image visible. ImageView.Visibility = Visibility.Visible;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Error");
}
}
privatestatic Task WaitForRenderCompleteAsync(MapView mapview) {
// The task completion source manages the task, including marking it as finished when the time comes. TaskCompletionSource<object> tcs = new TaskCompletionSource<object>();
// If the map is currently finished drawing, set the result immediately.if (mapview.DrawStatus == DrawStatus.Completed)
{
tcs.SetResult(null);
}
// Otherwise, configure a callback and a timeout to either set the result when// the map is finished drawing or set the result after 2000 ms.else {
// Define a cancellation token source for 2000 ms.constint timeoutMs = 2000;
var ct = new CancellationTokenSource(timeoutMs);
// Register the callback that sets the task result after 2000 ms. ct.Token.Register(() =>
tcs.TrySetResult(null), false);
// Define a local function that will set the task result and unregister itself when the map finishes drawing.voidDrawCompleteHandler(object s, DrawStatusChangedEventArgs e) {
if (e.Status == DrawStatus.Completed)
{
mapview.DrawStatusChanged -= DrawCompleteHandler;
tcs.TrySetResult(null);
}
}
// Register the draw complete event handler. mapview.DrawStatusChanged += DrawCompleteHandler;
}
// Return the task.return tcs.Task;
}
}
}