如何注入CSS在WebBrowser控件？控件、CSS、WebBrowser
2023-09-02 01:42:06
作者：深情不如久伴。
按我所知，没有办法的javascript到DOM注入。下面是示例code表示注入的JavaScript与 web浏览器控制：
As per my knowledge,there is a way to inject javascript into the DOM. Below is the sample code that injects javascript with the webbrowser control:
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来注入的CSS到DOM？
Is there an easier way to inject css into the DOM?
推荐答案
我没有尝试这个自己，但由于CSS样式规则可以使用包含在文档中的＆LT;风格＆GT; 标签中：
I didn't try this myself but since CSS style rules can be included in a document using the <style> tag as in:
<html>
<head>
<style type="text/css">
h1 {color:red}
p {color:blue}
</style>
</head>
您可以尝试，并提供：
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);
一展身手。您在这里可以找到的IHTMLStyleElement 更多信息。
a go. You can find more info on the IHTMLStyleElement here.
看来答案是非常非常简单的，比我原来想象：
It seems the answer is much much simpler than I originally thought:
IHTMLDocument2 doc = (webBrowser1.Document.DomDocument) as HTMLDocument2;
// 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，以验证其工作原理。我来到这个最终的结果通过MSDN上做一个搜索IHTMLStyleSheet，在这我偶然横跨this页面，this页面和this 之一。
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