.net core3.1 使PuppeteerSharp截图一个窗体多个窗口截图版

 public class PuppeteerSharpHelps
    {
        public PuppeteerSharpHelps()
        {

        }
        private static PuppeteerSharp.Browser _browser { get; set; }
        /// <summary>
        /// 截图完成回调
        /// </summary>
        public static event EventHandler ScreenshotComplete;
        /// <summary>
        /// 截图出错回调
        /// </summary>
        public static event EventHandler ScreenshotError;
        private async static Task<Browser> Browsers()
        {
            try
            {
                await slimLock.WaitAsync();
                var result = await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
                if (_browser == null)
                {
                    Debug.WriteLine("标识输出");
                    _browser = await Puppeteer.LaunchAsync(new LaunchOptions
                    {
                        Headless = true,
                        Args = new string[] {
                            "--disable-infobars",//隐藏 自动化标题
                            "--no-sandbox", // 沙盒模式
                        },
                    });
                    return _browser;
                }
                return _browser;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                slimLock.Release();
            }
        }
        //异步线程锁
        private static SemaphoreSlim slimLock = new SemaphoreSlim(1, 1);
        private static readonly SemaphoreSlim _mutex = new SemaphoreSlim(10);
        public static async Task ScreenshotAsync(string loadUrl, string savePath, int width = 0, int height = 0)
        {
            try
            {
                _browser ??= await Browsers();
                await _mutex.WaitAsync();
                if (width == 0 || height == 0)
                {
                    await BrowsersPage(loadUrl, savePath);
                }
                else
                {
                    await BrowsersPage(loadUrl, savePath, width, height);
                }

            }
            catch (Exception ex)
            {
                await _browser?.CloseAsync();
                _browser = null;
                GC.Collect();
                throw ex;
            }
            finally
            {
                _mutex.Release();
                GC.Collect();
            }
        }
        private static async Task BrowsersPage(string loadUrl, string savePath)
        {
            Page page = await _browser.NewPageAsync();
            page.Load += async (sender, e) =>
            {
                try
                {
                    var load = (Page)sender;
                    await page.ScreenshotAsync(savePath, new ScreenshotOptions() { Type = ScreenshotType.Png });
                    ScreenshotComplete(savePath, new ScreenshotEventArgs() { IsScreenshot = true, SavePath = savePath });
                    await page.CloseAsync();
                }
                catch (Exception ex)
                {
                    ScreenshotError(savePath, new ScreenshotErrorEventArgs() { Error = ex, IsScreenshot = false, SavePath = savePath });
                }
            };
            await page.SetViewportAsync(new ViewPortOptions
            {
                Width = 1000,
                Height = 1000
            });
            var text = await page.GoToAsync(loadUrl);
            page.Close += async (sender, e) =>
            {
                var pg = (Page)sender;
                var size = await pg.Browser.PagesAsync();
                if (size.Length <= 1)
                {
                    //_browser?.CloseAsync();
                    await _browser.DisposeAsync();
                    _browser = null;
                }
            };
        }
        private static async Task BrowsersPage(string loadUrl, string savePath, int width, int height)
        {
            Page page = await _browser.NewPageAsync();
            page.Load += async (sender, e) =>
            {
                try
                {
                    var load = (Page)sender;
                    await page.ScreenshotAsync(savePath, new ScreenshotOptions() { Type = ScreenshotType.Png });
                    ScreenshotComplete(savePath, new ScreenshotEventArgs() { IsScreenshot = true, SavePath = savePath });
                    await page.CloseAsync();
                }
                catch (Exception ex)
                {
                    ScreenshotError(savePath, new ScreenshotErrorEventArgs() { Error = ex, IsScreenshot = false, SavePath = savePath });
                }
            };
            await page.SetViewportAsync(new ViewPortOptions
            {
                Width = width,
                Height = height
            });
            await page.GoToAsync(loadUrl);
            page.Close += async (sender, e) =>
            {
                var pg = (Page)sender;
                var size = await pg.Browser.PagesAsync();
                if (size.Length <= 1)
                {
                    await _browser.DisposeAsync();
                    _browser = null;
                }
            };
        }
    }

    public class ScreenshotEventArgs : EventArgs
    {
        /// <summary>
        /// 截图成功为true
        /// </summary>
        public bool IsScreenshot { get; set; }

        /// <summary>
        /// 截图保存的路径
        /// </summary>
        public string SavePath { get; set; }

    }

    public class ScreenshotErrorEventArgs : EventArgs
    {
        /// <summary>
        /// 截图成功为true
        /// </summary>
        public bool IsScreenshot { get; set; }
        /// <summary>
        /// 截图保存的路径
        /// </summary>
        public string SavePath { get; set; }
        /// <summary>
        /// 出错内容
        /// </summary>
        public object Error { get; set; }

    }

　　

测试代码：

 for (int i = 1; i <= 50; i++)
                {
                    if ((i % 2) == 0)
                    {
                        PuppeteerSharpHelps.ScreenshotAsync("https://www.baidu.com", $"F://test{i}.png", i);
                    }
                    else
                    {
                        PuppeteerSharpHelps.ScreenshotAsync("https://www.csdn.net/", $"F://test{i}.png", i);
                    }
                }