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();
            //設置代理服務器地址
            //pds.Proxy = $"{ip}:{port}";
            //設置代理服務器認證信息
            //pds.ProxyAuthentication = GetProxyAuthorization();
            return pds;
        }

        /// <summary>
        /// 生成縮略圖重載方法1，返回縮略圖的Image對象
        /// </summary>
        /// <param name="targetWidth">縮略圖的寬度</param>
        /// <param name="targetHeight">縮略圖的高度</param>
        /// <returns>縮略圖的Image對象</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類的新實例
                Bitmap bitmap = new Bitmap(targetWidth, targetHeight, PixelFormat.Format32bppArgb);
                //從指定的Image對象創建新Graphics對象
                using (Graphics graphics = Graphics.FromImage(bitmap))
                {
                    //清除整個繪圖面並以透明背景色填充
                    graphics.Clear(Color.Transparent);
                    //在指定位置並且按指定大小繪制原圖片對象

                    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;
            }
        }
    }
}

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(); //設置代理服務器地址 //pds.Proxy = $"{ip}:{port}"; //設置代理服務器認證信息 //pds.ProxyAuthentication = GetProxyAuthorization(); return pds; }
/// <summary> /// 生成縮略圖重載方法1，返回縮略圖的Image對象 /// </summary> /// <param name="targetWidth">縮略圖的寬度</param> /// <param name="targetHeight">縮略圖的高度</param> /// <returns>縮略圖的Image對象</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類的新實例 Bitmap bitmap = new Bitmap(targetWidth, targetHeight, PixelFormat.Format32bppArgb); //從指定的Image對象創建新Graphics對象 using (Graphics graphics = Graphics.FromImage(bitmap)) { //清除整個繪圖面並以透明背景色填充 graphics.Clear(Color.Transparent); //在指定位置並且按指定大小繪制原圖片對象
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; } }

利用Selenium+PhantomJS 實現截圖