据我所知,有一种方法可以将javascript注入DOM。下面是使用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");
有没有更简单的方法将css注入DOM?
答案 0 :(得分:27)
我自己没有尝试过,但由于CSS样式规则可以使用<style>
标记包含在文档中,如下所示:
<html>
<head>
<style type="text/css">
h1 {color:red}
p {color:blue}
</style>
</head>
你可以尝试给予:
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);
一个去吧。您可以在IHTMLStyleElement here上找到更多信息。
似乎答案比我原先想的要简单得多:
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.
我写了一个小测试项目,以验证这是否有效。我通过在MSDN上搜索IHTMLStyleSheet来获得最终结果,我在this page,this page和this one上发生了这种情况。
答案 1 :(得分:0)
对我来说,这就像在DocumentText.
中首先设置样式一样简单,显然不是最佳实践,但它适用于简单的CSS。
webBrowser1.DocumentText = "<style> " +
"body { " +
"font-family: Algerian; " +
"} " +
"</style> "+
"<a href='https://www.google.ca'>Test</a>";