据我所知,有一种注入到DOM的方法.以下是使用webbrowser控件注入
javascript的示例代码：
HtmlElement head = webbrowser1.Document.GetElementsByTagName("head")[0];
HtmlElement scriptEl = webbrowser1.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;
element.text = "function sayHello() { alert('hello') }";
head.AppendChild(scriptEl);
webbrowser1.Document.InvokeScript("sayHello");
有没有更简单的方式将CSS注入DOM？
解决方法
我没有尝试这个,但CSS样式规则可以包含在使用< style>标签如：
<html>
<head>
<style type="text/css">
h1 {color:red}
p {color:blue}
</style>
</head>
你可以尝试给：
HtmlElement head = webbrowser1.Document.GetElementsByTagName("head")[0];
HtmlElement styleEl = webbrowser1.Document.CreateElement("style");
IHTMLStyleElement element = (IHTMLStyleElement)styleEl.DomElement;
IHTMLStyleSheetElement styleSheet = element.styleSheet;
styleSheet.csstext = @"h1 { color: red }";
head.AppendChild(styleEl);
一路走来您可以在IHTMLStyleElement here上找到更多信息.
编辑
似乎答案比我原来想的要简单得多：
using mshtml;
IHTMLDocument2 doc = (webbrowser1.Document.DomDocument) as IHTMLDocument2;
// The first parameter is the url,the second is the index of the added style sheet.
IHTMLStyleSheet ss = doc.createStyleSheet("",0);
// Now that you have the style sheet you have a few options:
// 1. You can just set the content as text.
ss.csstext = @"h1 { color: blue; }";
// 2. You can add/remove style rules.
int index = ss.addRule("h1","color: red;");
ss.removeRule(index);
// You can even walk over the rules using "ss.rules" and modify them.
我写了一个小的测试项目,以验证这是否有效.我通过在MSDN上搜索IHTMLStyleSheet,在this page,this page和this one发生了这个最终结果.