Asp.Net获取网站截图的实例代码

using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.text;
using system.windows.forms;
namespace windowsformsapplication1
{
    public partial class form1 : form
    {
        private webbrowser _webbrowser;
        public form1()
        {
            initializecomponent();
        }
        public void getthumbnail(string url)
        {
            _webbrowser = new webbrowser();
            _webbrowser.scrollbarsenabled = false; //不显示滚动条
            _webbrowser.navigate(url);
            _webbrowser.documentcompleted = new webbrowserdocumentcompletedeventhandler(completed);
            while (_webbrowser.readystate != webbrowserreadystate.complete)
            {
                system.windows.forms.application.doevents(); //避免假死，若去掉则可能无法触发 documentcompleted 事件。
            }
        }
        public void completed(object sender, webbrowserdocumentcompletedeventargs e)
        {
            //设置浏览器宽度、高度为文档宽度、高度，以便截取整个网页。
            _webbrowser.width = _webbrowser.document.body.scrollrectangle.width;
            _webbrowser.height = _webbrowser.document.body.scrollrectangle.height;
            using (bitmap bmp = new bitmap(_webbrowser.width, _webbrowser.height))
            {
                _webbrowser.drawtobitmap(bmp, new rectangle(0, 0, bmp.width, bmp.height));
                bmp.save("capture.png", system.drawing.imaging.imageformat.png);
                picturebox1.imagelocation = "capture.png";
            }
        }
        private void button1_click(object sender, eventargs e)
        {
            getthumbnail(textbox1.text);
        }
    }
}