使用c#在webbrowser控件中折叠加载的xml的所有元素 [英] collapse all elements for loaded xml in webbrowser control using c#
问题描述
我使用System.Windows.Forms.WebBrowser以突出显示的语法显示XML,并且易于遍历格式。每当我将XML加载到控件中时,我想将所有元素折叠,这是否可能?
I am using the System.Windows.Forms.WebBrowser to display XML in a syntax highlighted and easy to traverse format. Whenever I load the XML into the Control, I would like to have all the elements collapsed, is this possible?
推荐答案
由DocumentCompleted事件处理程序触发。
This is triggered by the DocumentCompleted event handler.
这是一个有用的链接来帮助java脚本注入:
this was a useful link to help with java script injection:
a href =http://stackoverflow.com/questions/4517460/how-to-execute-custom-javascript-in-webbrowser-control>如何在WebBrowser控件中执行自定义JavaScript?
How to execute custom JavaScript in WebBrowser control?
我使用下面的代码。
private void CollapseExpandDocument(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (sender == null)
{
return;
}
try
{
WebBrowser me = (WebBrowser) sender;
HtmlElement head = me.Document.GetElementsByTagName("head")[0];
HtmlElement scriptEl = me.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;
string func = @"
function collapseDoc()
{
var className = 'b';
var hasClassName = new RegExp('(?:^|\\s)' + className + '(?:$|\\s)');
var allElements = document.getElementsByTagName('a');
var element;
for (var i = 0; (element = allElements[i]) != null; i++)
{
var elementClass = element.className;
if (elementClass && elementClass.indexOf(className) != -1 && hasClassName.test(elementClass))
ch(element.parentElement.parentElement);
}
}";
element.text = func;
head.AppendChild(scriptEl);
me.Document.InvokeScript("collapseDoc");
}
catch
{
//not interested in knowing if the collapse/expand failed...
}
}
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