using OpenQA.Selenium;using OpenQA.Selenium.PhantomJS;using System;using System.Drawing;using System.Drawing.Imaging;using System.IO;using System.Threading.Tasks;namespace WebKitTest{    internal class Program    {        private static void Main(string[] args)        {            Parallel.For(0, 20, i =>            {                var url = "http://www.baidu.com";                IWebDriver driver = new PhantomJSDriver(GetPhantomJSDriverService());                driver.Navigate().GoToUrl(url);                ITakesScreenshot screenshotDriver = driver as ITakesScreenshot;                Screenshot screenshot = screenshotDriver.GetScreenshot();                using (MemoryStream stream = new MemoryStream(screenshot.AsByteArray))                {                    using (var soourceImage = Image.FromStream(stream))                    {                        var cutedImage = GetReducedImage(800, 800, soourceImage);                        if (cutedImage != null)                        {                            cutedImage.Save(AppDomain.CurrentDomain.BaseDirectory + "//" + i.ToString() + ".jpg", ImageFormat.Jpeg);                        }                    }                }            });            for (int i = 0; i < 100; i++)            {            }            Console.Read();        }        private static PhantomJSDriverService GetPhantomJSDriverService()        {            PhantomJSDriverService pds = PhantomJSDriverService.CreateDefaultService();            //设置代理服务器地址            //pds.Proxy = $"{ip}:{port}";            //设置代理服务器认证信息            //pds.ProxyAuthentication = GetProxyAuthorization();            return pds;        }        /// <summary>        /// 生成缩略图重载方法1，返回缩略图的Image对象        /// </summary>        /// <param name="targetWidth">缩略图的宽度</param>        /// <param name="targetHeight">缩略图的高度</param>        /// <returns>缩略图的Image对象</returns>        public static Image GetReducedImage(int targetWidth, int targetHeight, Image sourceImage)        {            try            {                //用指定的大小和格式初始化Bitmap类的新实例                Bitmap bitmap = new Bitmap(targetWidth, targetHeight, PixelFormat.Format32bppArgb);                //从指定的Image对象创建新Graphics对象                using (Graphics graphics = Graphics.FromImage(bitmap))                {                    //清除整个绘图面并以透明背景色填充                    graphics.Clear(Color.Transparent);                    //在指定位置并且按指定大小绘制原图片对象                    int sourceWidth = sourceImage.Width;                    int sourceHeight = sourceImage.Height;                    int sourceStartX = 0;                    int targetStartX = 0;                    int sourceStartY = 0;                    int targetStartY = 0;                    int sourceEndX = 0;                    int targetEndX = 0;                    int sourceEndY = 0;                    int targetEndY = 0;                    if (sourceWidth <= targetWidth)                    {                        sourceStartX = 0;                        targetStartX = (targetWidth - sourceWidth) / 2;                        sourceEndX = sourceWidth;                        targetEndX = sourceWidth + targetStartX;                    }                    else                    {                        sourceStartX = (sourceWidth - targetWidth) / 2;                        targetStartX = 0;                        sourceEndX = targetWidth + sourceStartX;                        targetEndX = targetWidth;                    }                    if (targetEndX - sourceStartX > targetWidth)                    {                        targetEndX = targetWidth - sourceStartX;                    }                    if (sourceHeight <= targetHeight)                    {                        sourceEndY = sourceHeight;                        targetEndY = sourceHeight;                    }                    else                    {                        sourceEndY = targetHeight;                        targetEndY = targetHeight;                    }                    Rectangle destRect = new Rectangle(targetStartX, targetStartY, targetEndX - targetStartX, targetEndY - targetStartY);//矩形容器                    Rectangle srcRect = new Rectangle(sourceStartX, sourceStartY, sourceEndX - sourceStartX, sourceEndY - sourceStartY);                    graphics.DrawImage(sourceImage, destRect, srcRect, GraphicsUnit.Pixel);                    return bitmap;                }            }            catch (Exception e)            {                return null;            }        }    }}