深圳龙岗建站公司,昆明网站建设 昆明光硕,怎么用php做网站方案,二级域名购买平台背景最近再做一个需求#xff0c;需要对网页生成预览图#xff0c;如下图但是网页千千万#xff0c;总不能一个个打开#xff0c;截图吧#xff1b;于是想着能不能使用代码来实现网页的截图。其实要实现这个功能#xff0c;无非就是要么实现一个仿真浏览器#xff0c;要… 背景最近再做一个需求需要对网页生成预览图如下图但是网页千千万总不能一个个打开截图吧于是想着能不能使用代码来实现网页的截图。其实要实现这个功能无非就是要么实现一个仿真浏览器要么调用系统浏览器再进行截图操作。代码实现1、启用线程Thread void startPrintScreen(ScreenShotParam requestParam){Thread thread new Thread(new ParameterizedThreadStart(do_PrintScreen));thread.SetApartmentState(ApartmentState.STA);thread.Start(requestParam);if (requestParam.Wait){thread.Join();FileInfo result new FileInfo(requestParam.SavePath);long minSize 1 * 1024;// 太小可能是空白圖重抓int maxRepeat 2; while ((!result.Exists || result.Length minSize) maxRepeat 0){thread new Thread(new ParameterizedThreadStart(do_PrintScreen));thread.SetApartmentState(ApartmentState.STA);thread.Start(requestParam);thread.Join();maxRepeat--;}}}
2、模拟浏览器WebBrowser void do_PrintScreen(object param){try{ScreenShotParam screenShotParam (ScreenShotParam)param;string requestUrl screenShotParam.Url;string savePath screenShotParam.SavePath;WebBrowser wb new WebBrowser();wb.ScrollBarsEnabled false;wb.ScriptErrorsSuppressed true;wb.Navigate(requestUrl);logger.Debug(wb.Navigate);DateTime startTime DateTime.Now;TimeSpan waitTime new TimeSpan(0, 0, 0, 10, 0);// 10 secondwhile (wb.ReadyState ! WebBrowserReadyState.Complete){Application.DoEvents();if (DateTime.Now - startTime waitTime){wb.Dispose();logger.Debug(wb.Dispose() timeout);return;}}wb.Width screenShotParam.Left screenShotParam.Width screenShotParam.Left; // wb.Document.Body.ScrollRectangle.Width (避掉左右側的邊線);wb.Height screenShotParam.Top screenShotParam.Height; // wb.Document.Body.ScrollRectangle.Height;wb.ScrollBarsEnabled false;wb.Document.Body.Style overflow:hidden;//hide scroll barvar doc (wb.Document.DomDocument) as mshtml.IHTMLDocument2;var style doc.createStyleSheet(, 0);style.cssText img { border-style: none; };Bitmap bitmap new Bitmap(wb.Width, wb.Height);wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));wb.Dispose();logger.Debug(wb.Dispose());bitmap CutImage(bitmap, new Rectangle(screenShotParam.Left, screenShotParam.Top, screenShotParam.Width, screenShotParam.Height));bool needResize screenShotParam.Width screenShotParam.ResizeMaxWidth || screenShotParam.Height screenShotParam.ResizeMaxWidth;if (needResize){double greaterLength bitmap.Width bitmap.Height ? bitmap.Width : bitmap.Height;double ratio screenShotParam.ResizeMaxWidth / greaterLength;bitmap Resize(bitmap, ratio);}bitmap.Save(savePath, System.Drawing.Imaging.ImageFormat.Gif);bitmap.Dispose();logger.Debug(bitmap.Dispose(););logger.Debug(finish);}catch (Exception ex){logger.Info($exception: {ex.Message});}}
3、截图操作 private static Bitmap CutImage(Bitmap source, Rectangle p){// An empty bitmap which will hold the cropped imageBitmap bmp new Bitmap(p.Width, p.Height);//using (Bitmap bmp new Bitmap(p.Width, p.Height)){Graphics g Graphics.FromImage(bmp);// Draw the given area (p) of the source image// at location 0,0 on the empty bitmap (bmp)g.DrawImage(source, 0, 0, p, GraphicsUnit.Pixel);return bmp;}}private static Bitmap Resize(Bitmap originImage, Double times){int width Convert.ToInt32(originImage.Width * times);int height Convert.ToInt32(originImage.Height * times);return ResizeProcess(originImage, originImage.Width, originImage.Height, width, height);}
完整代码 public static string ScreenShotAndSaveAmazonS3(string account, string locale, Guid rule_ID, Guid template_ID){//新的Templatevar url string.Format(https://xxxx/public/previewtemplate?showTemplateName0locale{0}inputTemplateId{1}inputThemeIdAccount{2},locale,template_ID,account);var tempPath Tools.GetAppSetting(TempPath);//路徑準備var userPath AmazonS3.GetS3UploadDirectory(account, locale, AmazonS3.S3SubFolder.Template);var fileName string.Format({0}.gif, template_ID);var fullFilePath Path.Combine(userPath.LocalDirectoryPath, fileName);logger.Debug(userPath: {0}, fileName: {1}, fullFilePath: {2}, url:{3}, userPath, fileName, fullFilePath, url);//開始截圖並暫存在本機var screen new Screen();screen.ScreenShot(url, fullFilePath);//將截圖儲存到 Amazon S3//var previewImageUrl AmazonS3.UploadFile(fullFilePath, userPath.RemotePath fileName);return string.Empty;}
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;namespace PrintScreen.Common
{public class Screen{protected static NLog.Logger logger NLog.LogManager.GetCurrentClassLogger();public void ScreenShot(string url, string path, int width 400, int height 300, int left 50, int top 50, int resizeMaxWidth 200, int wait 1){if (!string.IsNullOrEmpty(url) !string.IsNullOrEmpty(path)){ScreenShotParam requestParam new ScreenShotParam{Url url,SavePath path,Width width,Height height,Left left,Top top,ResizeMaxWidth resizeMaxWidth,Wait wait ! 0};startPrintScreen(requestParam);}}void startPrintScreen(ScreenShotParam requestParam){Thread thread new Thread(new ParameterizedThreadStart(do_PrintScreen));thread.SetApartmentState(ApartmentState.STA);thread.Start(requestParam);if (requestParam.Wait){thread.Join();FileInfo result new FileInfo(requestParam.SavePath);long minSize 1 * 1024;// 太小可能是空白圖重抓int maxRepeat 2; while ((!result.Exists || result.Length minSize) maxRepeat 0){thread new Thread(new ParameterizedThreadStart(do_PrintScreen));thread.SetApartmentState(ApartmentState.STA);thread.Start(requestParam);thread.Join();maxRepeat--;}}}void do_PrintScreen(object param){try{ScreenShotParam screenShotParam (ScreenShotParam)param;string requestUrl screenShotParam.Url;string savePath screenShotParam.SavePath;WebBrowser wb new WebBrowser();wb.ScrollBarsEnabled false;wb.ScriptErrorsSuppressed true;wb.Navigate(requestUrl);logger.Debug(wb.Navigate);DateTime startTime DateTime.Now;TimeSpan waitTime new TimeSpan(0, 0, 0, 10, 0);// 10 secondwhile (wb.ReadyState ! WebBrowserReadyState.Complete){Application.DoEvents();if (DateTime.Now - startTime waitTime){wb.Dispose();logger.Debug(wb.Dispose() timeout);return;}}wb.Width screenShotParam.Left screenShotParam.Width screenShotParam.Left; // wb.Document.Body.ScrollRectangle.Width (避掉左右側的邊線);wb.Height screenShotParam.Top screenShotParam.Height; // wb.Document.Body.ScrollRectangle.Height;wb.ScrollBarsEnabled false;wb.Document.Body.Style overflow:hidden;//hide scroll barvar doc (wb.Document.DomDocument) as mshtml.IHTMLDocument2;var style doc.createStyleSheet(, 0);style.cssText img { border-style: none; };Bitmap bitmap new Bitmap(wb.Width, wb.Height);wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));wb.Dispose();logger.Debug(wb.Dispose());bitmap CutImage(bitmap, new Rectangle(screenShotParam.Left, screenShotParam.Top, screenShotParam.Width, screenShotParam.Height));bool needResize screenShotParam.Width screenShotParam.ResizeMaxWidth || screenShotParam.Height screenShotParam.ResizeMaxWidth;if (needResize){double greaterLength bitmap.Width bitmap.Height ? bitmap.Width : bitmap.Height;double ratio screenShotParam.ResizeMaxWidth / greaterLength;bitmap Resize(bitmap, ratio);}bitmap.Save(savePath, System.Drawing.Imaging.ImageFormat.Gif);bitmap.Dispose();logger.Debug(bitmap.Dispose(););logger.Debug(finish);}catch (Exception ex){logger.Info($exception: {ex.Message});}}private static Bitmap CutImage(Bitmap source, Rectangle p){// An empty bitmap which will hold the cropped imageBitmap bmp new Bitmap(p.Width, p.Height);//using (Bitmap bmp new Bitmap(p.Width, p.Height)){Graphics g Graphics.FromImage(bmp);// Draw the given area (p) of the source image// at location 0,0 on the empty bitmap (bmp)g.DrawImage(source, 0, 0, p, GraphicsUnit.Pixel);return bmp;}}private static Bitmap Resize(Bitmap originImage, Double times){int width Convert.ToInt32(originImage.Width * times);int height Convert.ToInt32(originImage.Height * times);return ResizeProcess(originImage, originImage.Width, originImage.Height, width, height);}private static Bitmap ResizeProcess(Bitmap originImage, int oriwidth, int oriheight, int width, int height){Bitmap resizedbitmap new Bitmap(width, height);//using (Bitmap resizedbitmap new Bitmap(width, height)){Graphics g Graphics.FromImage(resizedbitmap);g.InterpolationMode System.Drawing.Drawing2D.InterpolationMode.High;g.SmoothingMode System.Drawing.Drawing2D.SmoothingMode.HighQuality;g.Clear(Color.Transparent);g.DrawImage(originImage, new Rectangle(0, 0, width, height), new Rectangle(0, 0, oriwidth, oriheight), GraphicsUnit.Pixel);return resizedbitmap;}}}class ScreenShotParam{public string Url { get; set; }public string SavePath { get; set; }public int Width { get; set; }public int Height { get; set; }public int Left { get; set; }public int Top { get; set; }/// summary/// 長邊縮到指定長度/// /summarypublic int ResizeMaxWidth { get; set; }public bool Wait { get; set; }}}效果完成达到预期的效果。
