100 lines
4.3 KiB
C#
100 lines
4.3 KiB
C#
// Copyright © 2010-2015 The CefSharp Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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using CefSharp.OffScreen;
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using System;
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using System.Diagnostics;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace CefSharp.MinimalExample.OffScreen
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{
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public class Program
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{
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private static ChromiumWebBrowser browser;
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public static void Main(string[] args)
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{
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const string testUrl = "https://www.google.com/";
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Console.WriteLine("This example application will load {0}, take a screenshot, and save it to your desktop.", testUrl);
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Console.WriteLine("You may see Chromium debugging output, please wait...");
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Console.WriteLine();
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var settings = new CefSettings()
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{
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//By default CefSharp will use an in-memory cache, you need to specify a Cache Folder to persist data
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CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache")
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};
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//Perform dependency check to make sure all relevant resources are in our output directory.
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Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);
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// Create the offscreen Chromium browser.
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browser = new ChromiumWebBrowser(testUrl);
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// An event that is fired when the first page is finished loading.
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// This returns to us from another thread.
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browser.LoadingStateChanged += BrowserLoadingStateChanged;
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// We have to wait for something, otherwise the process will exit too soon.
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Console.ReadKey();
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// Clean up Chromium objects. You need to call this in your application otherwise
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// you will get a crash when closing.
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Cef.Shutdown();
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}
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private static void BrowserLoadingStateChanged(object sender, LoadingStateChangedEventArgs e)
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{
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// Check to see if loading is complete - this event is called twice, one when loading starts
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// second time when it's finished
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// (rather than an iframe within the main frame).
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if (!e.IsLoading)
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{
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// Remove the load event handler, because we only want one snapshot of the initial page.
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browser.LoadingStateChanged -= BrowserLoadingStateChanged;
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var scriptTask = browser.EvaluateScriptAsync("document.getElementById('lst-ib').value = 'CefSharp Was Here!'");
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scriptTask.ContinueWith(t =>
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{
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//Give the browser a little time to render
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Thread.Sleep(500);
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// Wait for the screenshot to be taken.
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var task = browser.ScreenshotAsync();
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task.ContinueWith(x =>
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{
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// Make a file to save it to (e.g. C:\Users\jan\Desktop\CefSharp screenshot.png)
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var screenshotPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "CefSharp screenshot.png");
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Console.WriteLine();
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Console.WriteLine("Screenshot ready. Saving to {0}", screenshotPath);
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// Save the Bitmap to the path.
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// The image type is auto-detected via the ".png" extension.
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task.Result.Save(screenshotPath);
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// We no longer need the Bitmap.
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// Dispose it to avoid keeping the memory alive. Especially important in 32-bit applications.
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task.Result.Dispose();
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Console.WriteLine("Screenshot saved. Launching your default image viewer...");
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// Tell Windows to launch the saved image.
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Process.Start(new ProcessStartInfo(screenshotPath)
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{
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// UseShellExecute is false by default on .NET Core.
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UseShellExecute = true
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});
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Console.WriteLine("Image viewer launched. Press any key to exit.");
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}, TaskScheduler.Default);
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});
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}
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}
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}
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}
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