标签：
最近做一个WEB项目，其中要求有个功能就是程序能网页抓图，举个例子： 在test.aspx页面上放一个TextBox和一个Button，TextBox用来输入要抓取的网页地址，然后按了Button之后，服务器要对前面输入的网址进行抓图，然后显示出来。我把抓图的业务逻辑做成一个类：
using System; using System.Data; using System.Windows.Forms; using System.Drawing;
/// <summary> /// WebSnap ：网页抓图对象 /// </summary> public class WebSnap2 {
public WebSnap2() { // // TODO: 在此处添加构造函数逻辑 // }
/// <summary> /// 开始一个抓图并返回图象 /// </summary> /// <param name="Url">要抓取的网页地址</param> /// <returns></returns> public Bitmap StartSnap(string Url) { WebBrowser myWB = this.GetPage(Url); Bitmap returnValue = this.SnapWeb(myWB); myWB.Dispose(); return returnValue; }
private WebBrowser GetPage(string Url) { WebBrowser myWB = new WebBrowser(); myWB.ScrollBarsEnabled = false; myWB.Navigate(Url); while (myWB.ReadyState != WebBrowserReadyState.Complete) { System.Windows.Forms.Application.DoEvents(); } return myWB; }
private Bitmap SnapWeb(WebBrowser wb) { HtmlDocument hd = wb.Document; int height = Convert.ToInt32(hd.Body.GetAttribute("scrollHeight")) + 10; int width = Convert.ToInt32(hd.Body.GetAttribute("scrollWidth")) + 10; wb.Height = height; wb.Width = width; Bitmap bmp = new Bitmap(width, height); Rectangle rec = new Rectangle(); rec.Width = width; rec.Height = height; wb.DrawToBitmap(bmp, rec); return bmp; }
}
然后在test.asp的button_click事件里面调用：
WebSnap ws = new WebSnap(); Bitmap bmp= ws.StartSnap(TextBox1.Text); System.IO.MemoryStream ms = new System.IO.MemoryStream(); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); Response.BinaryWrite(ms.GetBuffer());
标签：
原文地址：http://www.cnblogs.com/qq260250932/p/5361043.html
