如何从 WPF WebBrowser 获取 HtmlElementCollection

问题描述

我的旧 WinForm 应用程序使用 HtmlElementCollection 处理页面

My old WinForm application used HtmlElementCollection to process a page

HtmlElementCollection hec = this.webbrowser.Document.GetElementsByTagName("input");

在 WPF WebBrowser 中，有几处不同.例如

In WPF WebBrowser, there are several things that are different. For example

this.webbrowser.Document 没有任何名为 GetElementsByTagName

因此我的代码无法获得 HtmlElementCollection

Therefore my code is unable to get an HtmlElementCollection

推荐答案

您需要添加对 Microsoft.mshtml 的引用，然后您需要将文档转换为 mshtml.HTMLDocument>.完成此操作后，您应该可以使用 getElementsByTagName() 方法

You need to add reference to Microsoft.mshtml and then you need to cast document as mshtml.HTMLDocument. After you do that you should be able to use getElementsByTagName() method

 var document = webBrowser.Document as mshtml.HTMLDocument;
 var inputs = document.getElementsByTagName("input");
 foreach (mshtml.IHTMLElement element in inputs)
 {

 }

getElementsByTagName() 返回 mshtml.IHTMLElementCollection 并且每个项目都是 mshtml.IHTMLElement 类型

getElementsByTagName() returns mshtml.IHTMLElementCollection and each item is of a mshtml.IHTMLElement type

编辑

替代解决方案，如果您需要使用 WinForms WebBrowser，您可以使用它而不是 WPF.添加对WindowsFormsIntegration 和System.Windows.Forms 的引用，在XAML 中创建命名空间并使用不同的浏览器控件

Alternative solution, if you need to use WinForms WebBrowser you can use that instead of the WPF one. Add reference to WindowsFormsIntegration and System.Windows.Forms, create namespace in XAML and use different browser control

<Window ...
    xmlns:winforms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms">
    <WindowsFormsHost>
        <winforms:WebBrowser x:Name="webBrowser"/>
    </WindowsFormsHost>
</Window>

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