在 C# 中解析 HTML 组合框

发布于 2024-09-28 10:53:45 字数 1121 浏览 0 评论 0原文

我需要解析 html 文件中的选择值。我有这个 html 文件：

<html>
<head></head>
<body>
    <select id="region" name="region">
        <option value="0"  selected>Všetky regiony</option> 
        <optgroup>Banskobystrický kraj</optgroup>
        <option value="k_1">Banskobystrický kraj</option>
        <option value="1">Banská Bystrica</option>
        <option value="3">Banská Štiavnica</option>
        <option value="18">Brezno</option>
        <option value="22">Detva</option>
        <option value="58">Dudince</option>
    </select>
</body>
</html>

我需要获取选择选项值以及字典中的文本值。我在 webBrowser 组件中加载此文件，并尝试通过 ID“region”获取选择标记。

        webBrowser1.Url = new Uri("file://\\C:\\1.html");

        if (webBrowser1.Document != null)
        {
            HtmlElement elems = webBrowser1.Document.GetElementById("region");
        }

但对象元素为空，我不知道为什么。有预付款吗？

编辑：问题已通过 Html Agillity Pack 解决。谢谢大家。我很愚蠢，我宁愿先听听你对 Html Agillity Pack 的建议。

原文

I need parse a select value in html file. I have this html file:

<html>
<head></head>
<body>
    <select id="region" name="region">
        <option value="0"  selected>Všetky regiony</option> 
        <optgroup>Banskobystrický kraj</optgroup>
        <option value="k_1">Banskobystrický kraj</option>
        <option value="1">Banská Bystrica</option>
        <option value="3">Banská Štiavnica</option>
        <option value="18">Brezno</option>
        <option value="22">Detva</option>
        <option value="58">Dudince</option>
    </select>
</body>
</html>

I need get select option value and also text value in dictionary. I load this file in webBrowser component a try get select tag by ID "region".

        webBrowser1.Url = new Uri("file://\\C:\\1.html");

        if (webBrowser1.Document != null)
        {
            HtmlElement elems = webBrowser1.Document.GetElementById("region");
        }

But object elems is null, I don’t why. Any advance?

EDIT: Problem was resolved with Html Agillity Pack. Thank for everybody. I was stupid, I had rather listen to your advice with Html Agillity Pack first.

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雾里花 2024-10-05 10:53:45

您可以使用 HtmlAgilityPack 来完成此操作。有很多使用它来解析html的例子。您可以通过谷歌搜索找到。以下是一些：

http://htmlagilitypack.codeplex.com/wikipage?title =Examples&referringTitle=Home

如何使用 HTML Agility pack

更新：

虽然我认为使用该库是更好的选择，但您可以通过以下方式使用网络浏览器控件来完成此操作：

    webBrowser1.DocumentCompleted += 
          new WebBrowserDocumentCompletedEventHandler(ParseOptions);

    webBrowser1.Url = new Uri("C:\\1.html", UriKind.Absolute);

    private void ParseOptions(object sender,
        WebBrowserDocumentCompletedEventArgs e)
    {
        HtmlElement elems = webBrowser1.Document.GetElementById("region");
    }

请注意，解析是在 DocumentCompleted 事件处理程序。

You can do it with the HtmlAgilityPack. There are many examples of using it to parsing html. You can find via a google search. Here are a few:

http://htmlagilitypack.codeplex.com/wikipage?title=Examples&referringTitle=Home

How to use HTML Agility pack

UPDATE:

While I think using the library is a better choice, you can do it with the webbrowser control in the following manner:

    webBrowser1.DocumentCompleted += 
          new WebBrowserDocumentCompletedEventHandler(ParseOptions);

    webBrowser1.Url = new Uri("C:\\1.html", UriKind.Absolute);

    private void ParseOptions(object sender,
        WebBrowserDocumentCompletedEventArgs e)
    {
        HtmlElement elems = webBrowser1.Document.GetElementById("region");
    }

Notice that the parsing is done in the DocumentCompleted event handler.

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