Summary of WEBBROWSER and JS interaction of C
- 2020-12-09 00:58:39
- OfStack
This article summarizes the WEBBROWSER and JS interaction methods of C#. Share to everybody for everybody reference. Specific implementation methods are as follows:
1. Realize WebBrowser internal jump to prevent IE from opening by default
1. Reference the encapsulated WebBrowserLinkSelf. dll implementation
public partial class MainWindow : Window
{
private WebBrowser webBrowser = new WebBrowser();
public MainWindow()
{
InitializeComponent();
this.webBrowser.LoadCompleted += new LoadCompletedEventHandler(webBrowser_LoadCompleted);
// make webbrowser Is hosted by Label On the implementation webborwser Internal jump, no IE Open the
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, reference com: Microsoft Internet Controls implementation (reference MSDN: http: / / msdn microsoft. com/en - us/library/system windows. controls. webbrowser. aspx public partial class MainWindow: Window
<em id="__mceDel"> {
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);
}
}
</em>2. Interaction between WebBrowser and JS
1. Interaction with page labels
// reference Microsoft.mshtml
//1 , add 1 a html Tag to id for lg the div In the
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 , set id for su The label of the value Values and style
//2.1 use setAttribute
HTMLDocument doc = (HTMLDocument)this.webBrowser.Document;
IHTMLElement search = doc.getElementById("su");
IHTMLDOMAttribute att = search.getAttribute("value") as IHTMLDOMAttribute;
search.setAttribute("value", " baidu 1 Under the ");
//search.click();
search.style.display = "none";
//2.2 use outerHtml
search.outerHTML = "<input id=\"su\" value=\" baidu 1 Under the \" class=\"bg s_btn\" type=\"submit\" onclick=\"alert(' baidu 1 Under the ');\" />";
//2.3 use IHTMLDOMAttribute
IHTMLAttributeCollection attributes = (search as IHTMLDOMNode).attributes as IHTMLAttributeCollection;
foreach (IHTMLDOMAttribute attr in attributes)
{
if (attr.nodeName == "value")
{
attr.nodeValue = " baidu 1 Under the ";
}
}
//3 Class styles were applied mnav the a The label
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='#' title=' Replace the label ' > replace </a>";
}
}
}
//4 , delete node
HTMLDocument doc = (HTMLDocument)this.webBrowser.Document;
IHTMLElement search = doc.getElementById("su");
IHTMLDOMNode node = search as IHTMLDOMNode;
node.parentNode.removeChild(node);
//5 , JS The event
//5.1 add JS
HTMLDocument doc = (HTMLDocument)this.webBrowser.Document;
IHTMLElement search = doc.getElementById("su");
search.outerHTML = "<input id=\"su\" value=\" baidu 1 Under the \" class=\"bg s_btn\" type=\"submit\" onclick=\"onClick();\" />";
IHTMLScriptElement scriptErrorSuppressed = (IHTMLScriptElement)doc.createElement("script");
scriptErrorSuppressed.type = "text/javascript";
scriptErrorSuppressed.text = "function onClick(){ alert(' add js'); }";
IHTMLElementCollection nodes = doc.getElementsByTagName("head");
foreach (IHTMLElement elem in nodes)
{
var head = (HTMLHeadElement)elem;
head.appendChild((IHTMLDOMNode)scriptErrorSuppressed);
}
//5.2 delete JS
IHTMLElementCollection scripts = (IHTMLElementCollection)doc.getElementsByName("script");
foreach (IHTMLElement node in scripts)
{
if (!(node is IHTMLUnknownElement))
{
IHTMLScriptElement script = node as IHTMLScriptElement;
// Delete all js File reference
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. Data interaction
public MainWindow()
{
InitializeComponent();
this.webBrowser.ObjectForScripting = new ScriptEvent();
this.webBrowser.NavigateToString(@"<html><head><title>Test</title></head><body><input type=""button"" value="" Click on the "" onclick=""window.external.ShowMessage(' baidu 1 Under the ');"" /></body></html>");
}
[System.Runtime.InteropServices.ComVisible(true)]
public class ScriptEvent
{
// for JS call
public void ShowMessage(string message)
{
MessageBox.Show(message);
}
}I hope this article has been helpful for your C# programming.