碰到一个项目，需要对指定的网页进行截图保存，晕死！
需求永远都是怪异的.....
解决是关键～
遂写了以下代码，快准狠!（因为赶时间！）
可以实现对指定的页面获取，按指定的大小生成缩略图，当然也可以1：1的产生图，
页面上的javascript 运行对截图貌似没任何影响，相当的正常，我个人都觉得很神奇。
首先对项目添加系统引用
| System.Drawing; System.Drawing.Design; System.Windows.Forms; |
获取指定网页并转换成图片的类：
| using System; using System.Collections.Generic; using System.Text; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Windows.Forms; using System.Diagnostics; namespace MyLib { public class GetImage { private int S_Height; private int S_Width; private int F_Height; private int F_Width; private string MyURL; public int ScreenHeight { get { return S_Height; } set { S_Height = value; } } public int ScreenWidth { get { return S_Width; } set { S_Width = value; } } public int ImageHeight { get { return F_Height; } set { F_Height = value; } } public int ImageWidth { get { return F_Width; } set { F_Width = value; } } public string WebSite { get { return MyURL; } set { MyURL = value; } } public GetImage(string WebSite, int ScreenWidth, int ScreenHeight, int ImageWidth, int ImageHeight) { this.WebSite = WebSite; this.ScreenWidth = ScreenWidth; this.ScreenHeight = ScreenHeight; this.ImageHeight = ImageHeight; this.ImageWidth = ImageWidth; } public Bitmap GetBitmap() { WebPageBitmap Shot = new WebPageBitmap(this.WebSite, this.ScreenWidth, this.ScreenHeight); Shot.GetIt(); Bitmap Pic = Shot.DrawBitmap(this.ImageHeight, this.ImageWidth); return Pic; } } class WebPageBitmap { WebBrowser MyBrowser; string URL; int Height; int Width; public WebPageBitmap(string url, int width, int height) { this.Height = height; this.Width = width; this.URL = url; MyBrowser = new WebBrowser(); MyBrowser.ScrollBarsEnabled = false; MyBrowser.Size = new Size(this.Width, this.Height); } public void GetIt() { MyBrowser.Navigate(this.URL); while (MyBrowser.ReadyState != WebBrowserReadyState.Complete) { Application.DoEvents(); } } public Bitmap DrawBitmap(int theight, int twidth) { Bitmap myBitmap = new Bitmap(Width, Height); Rectangle DrawRect = new Rectangle(0, 0, Width, Height); MyBrowser.DrawToBitmap(myBitmap, DrawRect); System.Drawing.Image imgOutput = myBitmap; System.Drawing.Image oThumbNail = new Bitmap(twidth, theight, imgOutput.PixelFormat); Graphics g = Graphics.FromImage(oThumbNail); g.CompositingQuality = CompositingQuality.HighSpeed; g.SmoothingMode = SmoothingMode.HighSpeed; g.InterpolationMode = InterpolationMode.HighQualityBilinear; Rectangle oRectangle = new Rectangle(0, 0, twidth, theight); g.DrawImage(imgOutput, oRectangle); try { return (Bitmap)oThumbNail; } catch (Exception ex) { return null; } finally { imgOutput.Dispose(); imgOutput = null; MyBrowser.Dispose(); MyBrowser = null; } } } } |
以下是调用方法，懒省事的方法，嘿嘿，赶时间就不说什么了，反正上面的抓取转换类已经写出来了，大家尽情的用异步，线程等方法自己玩吧！～
| string UrlPath; bool CaptureState = false; Guid guid; protected bool SaveOriginalPageToImage(Guid myGuid) { //使用guid 来命名 guid = myGuid; if (this.CurrentPageAct == PageAct.Edit) { string PagePath = Request.Url.LocalPath; PagePath = PagePath.Replace("Operation", "Capture"); UrlPath = PagePath + "?act=view&ProjectNo=" + _projectNo; Thread NewTh = new Thread(CaptureImage); NewTh.SetApartmentState(ApartmentState.STA); NewTh.Start(); while (NewTh.ThreadState == ThreadState.Running) { } //返回截取状态 return CaptureState; } return false; } /**//// <summary> /// 捕获屏幕 /// </summary> /// <param name="UrlPath"></param> /// <returns></returns> public void CaptureImage() { try { string url = "http://" + Request.Url.Host + ":" + Request.Url.Port.ToString(); url = url + UrlPath; GetImage thumb = new GetImage(url, 1024, 1200, 1024, 1200); System.Drawing.Bitmap x = thumb.GetBitmap(); string FileName = DateTime.Now.ToString("yyyyMMddhhmmss"); x.Save(Server.MapPath("~/Capture/SavePage") + "//" + guid + ".jpg"); CaptureState = true; } catch (Exception ex) { CaptureState = false; } } |