通過WebBrowser擷取網頁驗證碼

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/// <summary>/// 返回指定WebBrowser中圖片<IMG></IMG>中的圖內容/// </summary>/// <param name="WebCtl">WebBrowser控制項</param>/// <param name="ImgeTag">IMG元素</param>/// <returns>IMG對象</returns>private Image GetWebImage(WebBrowser WebCtl, HtmlElement ImgeTag){    HTMLDocument doc = (HTMLDocument)WebCtl.Document.DomDocument;    HTMLBody body = (HTMLBody)doc.body;    IHTMLControlRange rang = (IHTMLControlRange)body.createControlRange();    IHTMLControlElement Img = (IHTMLControlElement)ImgeTag.DomElement; //圖片地址    Image oldImage = Clipboard.GetImage();    rang.add(Img);    rang.execCommand("Copy", false, null);  //拷貝到記憶體    Image numImage = Clipboard.GetImage();    try    {        Clipboard.SetImage(oldImage);    }    catch    {    }    return numImage;}

調用

HtmlElement ImgeTag = webBrowser2.Document.All["id"];//根據驗證碼id擷取元素,根據實際情況更改Image numPic = GetWebImage(webBrowser2, ImgeTag); // 得到驗證碼圖片piccode.Image = numPic;