在 C# 中使用 Cefsharp 的整页屏幕截图

Question

我已经下载了Minimalexample.Offscreen的例子。这是我用于屏幕截图的代码，但我没有得到整页。图像被裁剪（仅截取可见页面屏幕截图）。

//   c# code
 var scriptTask = browser.EvaluateScriptAsync("document.getElementById('lst-ib').value = 'CefSharp Was Here!'");
        scriptTask.ContinueWith(t =>
                {
                    Thread.Sleep(500);
                    var task = browser.ScreenshotAsync();
                    task.ContinueWith(x =>
                    {
                        var screenshotPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "CefSharp screenshot.png");

                        Console.WriteLine();
                        Console.WriteLine("Screenshot ready. Saving to {0}", screenshotPath);
                        task.Result.Save(screenshotPath);
                        task.Result.Dispose();
                        Console.WriteLine("Screenshot saved.  Launching your default image viewer...");                       
                        Process.Start(screenshotPath);
                        Console.WriteLine("Image viewer launched.  Press any key to exit.");            
                    }, TaskScheduler.Default);
                  }).Wait();

如何使用 CefSharp offscreen 或 Cefsharp winforms 获取完整的长页面截图？

Answer 1

可能是因为您只等了半秒钟就加载了页面。看看在 Google Chrome 上加载需要多少时间，并给出这些秒数。三秒钟添加此

Thread.Sleep(3000);

Answer 2

经过很长一段时间我找到了解决方案。重点是根据页面高度设置webview高度然后截图。

CefSharp.OffScreen.ChromiumWebBrowser WebView =new CefSharp.OffScreen.ChromiumWebBrowser(siteUrl);
            
            int width = 1280;
            int height = 1480;

            string jsString = "Math.max(document.body.scrollHeight, " +
                              "document.documentElement.scrollHeight, document.body.offsetHeight, " +
                              "document.documentElement.offsetHeight, document.body.clientHeight, " +
                              "document.documentElement.clientHeight);";


            var executedScript = WebView.EvaluateScriptAsync(jsString).Result.Result;

            height = Convert.ToInt32(executedScript);

            var size = new Size(width, height);

            WebView.Size = size;

            Thread.Sleep(500);
            // Wait for the screenshot to be taken.
            var bitmap = WebView.ScreenshotOrNull();
            bitmap.Save(@"Test.jpg");

在 C# 中使用 Cefsharp 的整页屏幕截图

Full page screenshot with Cefsharp in C#

c#

screenshot

cefsharp.offscreen