标签:orm bit 生成 ntc navig new 没有 doc scrollbar
有时候我们需要将网页转成图片,那么可以使用WebBrowser来生成网页快照,废话不多说,代码如下
1、网页快照帮助类(如果是BS或控制台需要引用System.Windows.Forms类库):
public class WebSnapshotsHelper { Bitmap m_Bitmap; string m_Url; int m_BrowserWidth, m_BrowserHeight, m_ThumbnailWidth, m_ThumbnailHeight; public WebSnapshotsHelper(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight) { m_Url = Url; m_BrowserHeight = BrowserHeight; m_BrowserWidth = BrowserWidth; m_ThumbnailWidth = ThumbnailWidth; m_ThumbnailHeight = ThumbnailHeight; } public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight) { WebSnapshotsHelper thumbnailGenerator = new WebSnapshotsHelper(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight); return thumbnailGenerator.GenerateWebSiteThumbnailImage(); } public Bitmap GenerateWebSiteThumbnailImage() { Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage)); m_thread.SetApartmentState(ApartmentState.STA); m_thread.Start(); m_thread.Join(); return m_Bitmap; } private void _GenerateWebSiteThumbnailImage() { WebBrowser m_WebBrowser = new WebBrowser(); m_WebBrowser.ScrollBarsEnabled = false; m_WebBrowser.Navigate(m_Url); m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted); while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents(); m_WebBrowser.Dispose(); } private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { WebBrowser m_WebBrowser = (WebBrowser)sender; m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight); m_WebBrowser.ScrollBarsEnabled = false; m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height); m_WebBrowser.BringToFront(); m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds); m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero); } }
2、调用:
1 Bitmap m_Bitmap = WebSnapshotsHelper.GetWebSiteThumbnail("http://www.cnblogs.com/", 800, 1200, 800, 1200); //宽高根据要获取快照的网页决定 2 m_Bitmap.Save("render_img.bmp", System.Drawing.Imaging.ImageFormat.Bmp); //图片格式可以自由控制
这个可以在 html页面以一张图片为背景,在其中填空,最后调用此Helper方法来生成图片。
最后说一下:这个使用的是WebBrowser为核心,所以生成的html会根据IE内核来渲染,如果页面中使用到了HTML5、CSS3,那推荐部署的服务器装有IE10及以上浏览器,由于是在服务端生成,对客户端浏览器是没有限制。
标签:orm bit 生成 ntc navig new 没有 doc scrollbar
原文地址:https://www.cnblogs.com/xiaoheihei/p/10025398.html