我如何可以覆盖使用WPF web浏览器在网页上的btnSubmit_onclick javascript函数？ [英] How can I overwrite the btnSubmit_onclick javascript function on a web page using the WPF WebBrowser?

问题描述

我的WPF web浏览器控制是从的WinForms版本，并从这个优秀的网站根本就没有在WPF工作的许多建议不同的工作。

I'm working with the WPF WebBrowser control which is different from the WinForms version and many recommendations from this excellent web site simply do not work in WPF.

我怎么能覆盖 btnSubmit_onclick（）网​​页上的javascript函数？

How can I overwrite the btnSubmit_onclick() javascript function on a web page?

该函数生成一个确认对话框（如你确定吗？），我想绕过。基本上我想注入新的功能 btnSubmit_onclick（）将取代现有的，我可以省略恼人的确认对话框。我曾访问MSHTML和所有页面对象，但挣扎在页面的页眉注入脚本。到目前为止，我有：

This function generates a confirm dialog (like "Are you sure?") which I want to bypass. Basically I want to inject a new function btnSubmit_onclick() which will replace the existing one and I can omit annoying confirm dialog. I have access to MSHTML and all page objects, but struggle to inject script at the header of the page. So far I've got:

mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)webBrowser.Document;
mshtml.IHTMLElementCollection heads = doc.all.tags("head") as mshtml.IHTMLElementCollection;
mshtml.IHTMLElement head = heads.item(null, 0) as mshtml.IHTMLElement;
mshtml.IHTMLElement se = doc.createElement("script") as mshtml.IHTMLElement;
se.innerHTML = "function btnSubmit_onclick() { alert('here we are'); }";

但现在我需要先于其他其他脚本注入​​新的脚本元素插入头部的对象，我希望它会owerwrite现有的 btnSubmit_onclick（）函数下游。

我试过失败而head.injectAdjusentHTML拒绝注入任何脚本到页眉即使我使用DEFER属性。

I unsuccessfully tried head.injectAdjusentHTML which refuses to inject any script into the header even I use DEFER property.

我该怎么办呢？

推荐答案

我还没有测试这一点，只是一个猜测：
试试这个：

I havent tested this, is just a guess: Try this:

// For this code to work: add the Microsoft.mshtml .NET reference
mshtml.IHTMLDocument2 doc = WebBrowser1.Document as mshtml.IHTMLDocument2;
doc.parentWindow.execScript("document.body.onsubmit=new function(){ alert('here we are'); };");

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