从WebBrowserControl点击的HtmlElement获取的XPath [英] Get XPath from clicked HtmlElement in WebBrowserControl

问题描述

我怎样才能从WebBrowserControl一个点击的HtmlElement中的XPath

How can I get the XPath from a clicked HtmlElement in the WebBrowserControl?

这是我如何获取点击的HtmlElement：

This is how I retrieve the clicked HtmlElement:

System.Windows.Forms.HtmlDocument document = this.webBrowser1.Document;
document.MouseUp += new HtmlElementEventHandler(this.htmlDocument_Click);

private void htmlDocument_Click(object sender, HtmlElementEventArgs e)
{
    HtmlElement element = this.webBrowser1.Document.GetElementFromPoint(e.ClientMousePosition);
}

我想点击特定元素（价格，文章编号，说明等）一个网站，并得到他们的XPath表达式。

I want to click specific elements (price, article number, description, etc) on a website and get their XPath expressions.

感谢您！

推荐答案

XPath表达式不是HTML的标准特性（不像XML）。如果你正在寻找让你可以在以后使用的Html敏捷性包使用元素的XPath，你至少有两个选项：

XPath expression is not a standard feature of HTML (unlike with XML). If you're looking to get an element XPath which you can later use with Html Agility Pack, you have at least two options:

1. 使用的 HtmlElement.Parent 并构建
   的。XPath的手动

1. Walk up the element's DOM ancestry tree using HtmlElement.Parent and construct the XPath manually.

使用HTML敏捷性包本身做这样的事情（未经测试）：

Use Html Agility Pack itself and do something like this (untested):

HtmlElement element = this.webBrowser1.Document.GetElementFromPoint(e.ClientMousePosition);

var savedId = element.Id;
var uniqueId = Guid.NewGuid().ToString();
element.Id = uniqueId;

var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(element.Document.GetElementsByTagName("html")[0].OuterHtml);
element.Id = savedId;

var node = doc.GetElementbyId(uniqueId);
var xpath = node.XPath;

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