如何System.Windows.Forms.WebBrowser调用自定义的Javascript？ [英] How to invoke custom Javascript in System.Windows.Forms.WebBrowser?

问题描述

我加载一个包含下列code第三方网页

I'm loading third party webpage that contains following code

<script type="text/javascript">
onDomReady(function() { some_code1; });
</script>

到WebBrowser组件。经过 some_ code1 已经执行我需要做的Dom一些操作，这将使 some_ code1 无效。现在的问题是如何确定 some_ code1 已执行？

into WebBrowser component. After some_code1 had executed I need to do some manipulations with Dom that will make some_code1 invalid. The question is how to determine that some_code1 had executed?

我cant't做

private void web_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    DoRequiredManipulations();
}

由于会发生此事件的在的 some_ code1 已执行，并使其无效。

Since this event will occur before some_code1 has executed and will make it invalid.

此外，我不能这样做。

private void web_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    web.Document.InvokeScript("doSome_code1");
    DoRequiredManipulations();
}

由于 some_ code1 声明为一个匿名函数。

Since some_code1 is declared as an anonymous function.

看来，做到这一点的唯一方法是这样的：

It seems that the only way to do it is this:

private void web_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    var script = GetScriptText(web.DocumentText);
    //execute script in webbrowser
    DoRequiredManipulations();
}

现在的问题是，我不知道如何在网页浏览器执行该脚本。我曾试图 web.Navigate（JavaScript的：+脚本）; ，但它不能正常工作

The problem is that I don't know how to execute this script in webbrowser. I had tried web.Navigate("javascript: " + script); but it doesn't work correctly.

推荐答案

我发现如何做到这一点：

I found how to do that:

HtmlElement scriptEl = web.Document.CreateElement("script");
(scriptEl.DomElement as IHTMLScriptElement).text = "function myscript() { " + script.Text + " }";
web.Document.GetElementsByTagName("head")[0].AppendChild(scriptEl);
web.Document.InvokeScript("myscript");

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