C#：“瑞典语” 解析 Lating1Encoded 文档时 Xpath 中的字符

发布于 2024-07-18 20:43:48 字数 342 浏览 8 评论 0原文

我有一组需要解析的 html 文档。它们以 Latin1Encoded 编码。我正在使用 HtmlAgiliy 包进行“解析”。

我有一个 Xpath 查询（带有瑞典字符），由于文档之间的编码不同以及编码 VS 将 XPath 查询存储在其中，所以我无法工作。

Xpath 查询：

doc.DocumentNode.SelectNodes(@"//h2[text()='Företag']/../div//span[text()='Resultat:']/../div");

xpath 查询在 Firefox 扩展 xpath 检查器中工作正常。

原文

I've a set of html docs that I need to parse. They are encoded in Latin1Encoded. I'm using HtmlAgiliy pack for "parsing".

I have a Xpath query (with swedish characters) that I can't get to work because of different encodings between the docs and the encoding VS stores the XPath query in??

Xpath query:

doc.DocumentNode.SelectNodes(@"//h2[text()='Företag']/../div//span[text()='Resultat:']/../div");

The xpath query works fine in the Firefox extension xpath checker.

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笑看君怀她人 2024-07-25 20:43:48

您能否提供更多示例代码和一些输入 XML 文档？根据给出的信息，我编写了一个小示例程序，它按预期工作。以下内容对您有用吗？

示例文档：

<?xml version="1.0" encoding="iso-8859-1"?>
<doc>
  <test>Företag</test>
  <test>Hallå</test>
</doc>

using System;
using System.Xml.XPath;

class Program
{
    static void Main(string[] args)
    {
        XPathDocument xpdoc = new XPathDocument(@"sample.xml");
        XPathNavigator nav = xpdoc.CreateNavigator();
        XPathNodeIterator iter = nav.Select("//*[text() = 'Företag']");

        while (iter.MoveNext())
        {
            Console.WriteLine(iter.Current.ToString());
        }
    }
}

输出

Företag

从给出的示例代码来看，您似乎正在使用 Microsoft.Windows.Design.Documents.Trees.DocumentNode 类。但是，文档指出该类不适合直接使用。我可以问一下你想做什么吗？

更新：您可能面临空白规范化问题（这可能是由您的 FireFox 加载项完成的，而不是在您的代码中完成的）。您是否尝试通过将测试 text() = 'Företag' 替换为 normalize-space() = 'Företag' 来更改 XPath（只是为了排除存在以下情况的情况）是额外的前导或尾随空格）？

Could you provide more sample code and some input XML document? From the information given I wrote a little sample program which just works as expected. Does the following work for you?

Sample document:

<?xml version="1.0" encoding="iso-8859-1"?>
<doc>
  <test>Företag</test>
  <test>Hallå</test>
</doc>

using System;
using System.Xml.XPath;

class Program
{
    static void Main(string[] args)
    {
        XPathDocument xpdoc = new XPathDocument(@"sample.xml");
        XPathNavigator nav = xpdoc.CreateNavigator();
        XPathNodeIterator iter = nav.Select("//*[text() = 'Företag']");

        while (iter.MoveNext())
        {
            Console.WriteLine(iter.Current.ToString());
        }
    }
}

Output

Företag

From the sample code given it seems that you are using the Microsoft.Windows.Design.Documents.Trees.DocumentNode class. However, the documentation states that this class is not intended to be used directly. May I ask what you are trying to do?

Update: It might be that you are facing an issue with whitespace normalization (which might be done by your FireFox add-in and not in your code). Have you tried to change your XPath by replacing the test text() = 'Företag' by normalize-space() = 'Företag' (Just to exclude the case that there is additional leading or trailing whitespace)?

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