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webbrowser和js交互小结
一、实现WebBrowser内部跳转，阻止默认打开IE
1、引用封装好的WebBrowserLinkSelf.dll实现
public partial class MainWindow : Window { private WebBrowser webBrowser = new WebBrowser(); public MainWindow() { InitializeComponent(); this.webBrowser.LoadCompleted += new LoadCompletedEventHandler(webBrowser_LoadCompleted); //使webbrowser寄宿于Label上，实现webborwser内部跳转，不用IE打开 Label lb = new Label { Content = webBrowser }; WebBrowserHelper webBrowserHelper = new WebBrowserHelper(webBrowser); HelperRegistery.SetHelperInstance(lb, webBrowserHelper); webBrowserHelper.NewWindow += WebBrowserOnNewWindow; this.lbBrowserHost.Content = lb; // this.webBrowser.Navigate(new Uri("http://www.baidu.com", UriKind.RelativeOrAbsolute)); } private void WebBrowserOnNewWindow(object sender, CancelEventArgs e) { dynamic browser = sender; dynamic activeElement = browser.Document.activeElement; var link = activeElement.ToString(); this.webBrowser.Navigate(new Uri(link, UriKind.RelativeOrAbsolute)); e.Cancel = true; } }2、引用com：Microsoft Internet Controls实现（参考MSDN：http://msdn.microsoft.com/en-us/library/system.windows.controls.webbrowser.aspx public partial class MainWindow : Window
{ public MainWindow() { InitializeComponent(); this.webBrowser1.Navigate(new Uri("http://www.baidu.com", UriKind.RelativeOrAbsolute)); this.webBrowser1.LoadCompleted += new LoadCompletedEventHandler(webBrowser1_LoadCompleted); } private IServiceProvider serviceProvider; void webBrowser1_LoadCompleted(object sender, NavigationEventArgs e) { if (this.serviceProvider == null) { serviceProvider = (IServiceProvider)webBrowser1.Document; if (serviceProvider != null) { Guid serviceGuid = new Guid("0002DF05-0000-0000-C000-000000000046"); Guid iid = typeof(SHDocVw.WebBrowser).GUID; var webBrowserPtr = (SHDocVw.WebBrowser)serviceProvider .QueryService(ref serviceGuid, ref iid); if (webBrowserPtr != null) { webBrowserPtr.NewWindow2 += webBrowser1_NewWindow2; } } } } private void webBrowser1_NewWindow2(ref object ppDisp, ref bool Cancel) { dynamic browser = this.webBrowser1; dynamic activeElement = browser.Document.activeElement; var link = activeElement.ToString(); this.webBrowser1.Navigate(new Uri(link, UriKind.RelativeOrAbsolute)); Cancel = true; } [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("6d5140c1-7436-11ce-8034-00aa006009fa")] internal interface IServiceProvider { [return: MarshalAs(UnmanagedType.IUnknown)] object QueryService(ref Guid guidService, ref Guid riid); } }
二、WebBrowser与JS的交互
1、与页面标签的交互
//引用Microsoft.mshtml //1、添加一个html标签到id为lg的div中 HTMLDocument doc = (HTMLDocument)this.webBrowser.Document; IHTMLElement lbelem = doc.createElement("button"); lbelem.innerText = "test"; lbelem.style.background = "red"; IHTMLDOMNode node = doc.getElementById("lg") as IHTMLDOMNode; node.appendChild(lbelem as IHTMLDOMNode); //2、设置id为su的标签value值和style //2.1 使用setAttribute HTMLDocument doc = (HTMLDocument)this.webBrowser.Document; IHTMLElement search = doc.getElementById("su"); IHTMLDOMAttribute att = search.getAttribute("value") as IHTMLDOMAttribute; search.setAttribute("value", "百度一下"); //search.click(); search.style.display = "none"; //2.2 使用outerHtml search.outerHTML = "<input id=\"su\" value=http://www.mamicode.com/"百度一下\" class=\"bg s_btn\" type=\"submit\" onclick=\"alert(‘百度一下‘);\" />"; //2.3 使用IHTMLDOMAttribute IHTMLAttributeCollection attributes = (search as IHTMLDOMNode).attributes as IHTMLAttributeCollection; foreach (IHTMLDOMAttribute attr in attributes) { if (attr.nodeName == "value") { attr.nodeValue = "http://www.mamicode.com/百度一下"; } } //3、替换应用了类样式mnav的a标签 HTMLDocument doc = (HTMLDocument)this.webBrowser.Document; IHTMLElementCollection collect = doc.getElementsByTagName("a"); foreach (IHTMLElement elem in collect) { if (!(elem is IHTMLUnknownElement) && elem.className != null) { if (elem.className.Equals("mnav", StringComparison.OrdinalIgnoreCase)) { elem.outerHTML = "<a href=http://www.mamicode.com/‘#‘ title=‘替换标签‘ >替换"; } } } //4、删除节点 HTMLDocument doc = (HTMLDocument)this.webBrowser.Document; IHTMLElement search = doc.getElementById("su"); IHTMLDOMNode node = search as IHTMLDOMNode; node.parentNode.removeChild(node); //5、JS事件 //5.1 添加JS HTMLDocument doc = (HTMLDocument)this.webBrowser.Document; IHTMLElement search = doc.getElementById("su"); search.outerHTML = "<input id=\"su\" value=http://www.mamicode.com/"百度一下\" class=\"bg s_btn\" type=\"submit\" onclick=\"onClick();\" />"; IHTMLScriptElement scriptErrorSuppressed = (IHTMLScriptElement)doc.createElement("script"); scriptErrorSuppressed.type = "text/javascript"; scriptErrorSuppressed.text = "function onClick(){ alert(‘添加js‘); }"; IHTMLElementCollection nodes = doc.getElementsByTagName("head"); foreach (IHTMLElement elem in nodes) { var head = (HTMLHeadElement)elem; head.appendChild((IHTMLDOMNode)scriptErrorSuppressed); } //5.2 删除JS IHTMLElementCollection scripts = (IHTMLElementCollection)doc.getElementsByName("script"); foreach (IHTMLElement node in scripts) { if (!(node is IHTMLUnknownElement)) { IHTMLScriptElement script = node as IHTMLScriptElement; //删除所有js文件引用 if (string.IsNullOrEmpty(script.text)) { IHTMLDOMNode remove = script as IHTMLDOMNode; remove.parentNode.removeChild(remove); } } } //6、write new html mshtml.IHTMLDocument2 doc2 = this.webBrowser.Document as mshtml.IHTMLDocument2; doc2.clear(); doc2.writeln("<HTML><BODY>write new html</BODY></HTML>");2、数据交互
public MainWindow() { InitializeComponent(); this.webBrowser.ObjectForScripting = new ScriptEvent(); this.webBrowser.NavigateToString(@"<html><head><title>Test</title></head><body><input type=""button"" value=""点击"" onclick=""window.external.ShowMessage(‘百度一下‘);"" /></body></html>"); } [System.Runtime.InteropServices.ComVisible(true)] public class ScriptEvent { //供JS调用 public void ShowMessage(string message) { MessageBox.Show(message); } }webbrowser和js交互小结
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