用于更改链接的 HtmlAgilityPack 示例不起作用。我该如何实现这个目标?

发布于 2024-08-07 06:21:27 字数 1015 浏览 3 评论 0原文

codeplex 上的示例是这样的:

HtmlDocument doc = new HtmlDocument();
 doc.Load("file.htm");
 foreach(HtmlNode link in doc.DocumentElement.SelectNodes("//a[@href"])
 {
    HtmlAttribute att = link["href"];
    att.Value = FixLink(att);
 }
 doc.Save("file.htm");

第一期是 HtmlDocument。<强>DocumentElement不存在!确实存在的是 HtmlDocument.DocumentNode 但即使我使用它,我也无法按照描述访问 href 属性。我收到以下错误:

Cannot apply indexing with [] to an expression of type 'HtmlAgilityPack.HtmlNode'

这是当我收到此错误时我尝试编译的代码:

private static void ChangeUrls(ref HtmlDocument doc)
{
    foreach(HtmlNode link in doc.DocumentNode.SelectNodes("//@href"))
    {
        HtmlAttribute attr = link["href"];
        attr.Value = Rewriter(attr.Value);
    }
}

更新:我刚刚发现该示例从来没有打算工作......而且我有一个阅读示例代码后的解决方案...我将发布我的解决方案,供像我这样的其他人在完成后享受。

The example on codeplex is this :

HtmlDocument doc = new HtmlDocument();
 doc.Load("file.htm");
 foreach(HtmlNode link in doc.DocumentElement.SelectNodes("//a[@href"])
 {
    HtmlAttribute att = link["href"];
    att.Value = FixLink(att);
 }
 doc.Save("file.htm");

The first issue is HtmlDocument.DocumentElement does not exist! What does exist is HtmlDocument.DocumentNode but even when I use that instead, I'm unable to access the href attribute as described. I get the following error:

Cannot apply indexing with [] to an expression of type 'HtmlAgilityPack.HtmlNode'

Here's the code I'm trying to compile when I get this error:

private static void ChangeUrls(ref HtmlDocument doc)
{
    foreach(HtmlNode link in doc.DocumentNode.SelectNodes("//@href"))
    {
        HtmlAttribute attr = link["href"];
        attr.Value = Rewriter(attr.Value);
    }
}

UPDATE: I Just found that the example was never meant to work...And I've got a solution after reading the example code...I'll post my solution for other people like me to enjoy once completed.

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深爱不及久伴 2024-08-14 06:21:27

这是我基于 ZIP 中包含的部分示例代码的快速解决方案。

private static void ChangeLinks(ref HtmlDocument doc)
        {
            if (doc == null) return;
            //process all tage with link references
            HtmlNodeCollection links = doc.DocumentNode.SelectNodes("//*[@background or @lowsrc or @src or @href]");
            if (links == null)
                return;

            foreach (HtmlNode link in links)
            {

                if (link.Attributes["background"] != null)
                    link.Attributes["background"].Value = _newPath + link.Attributes["background"].Value;
                if (link.Attributes["href"] != null)
                    link.Attributes["href"].Value = _newPath + link.Attributes["href"].Value;(link.Attributes["href"] != null)
                    link.Attributes["lowsrc"].Value = _newPath + link.Attributes["href"].Value;
                if (link.Attributes["src"] != null)
                    link.Attributes["src"].Value = _newPath + link.Attributes["src"].Value;
            }
        }

Here's my quick solution based on portions of the sample code included in the ZIP.

private static void ChangeLinks(ref HtmlDocument doc)
        {
            if (doc == null) return;
            //process all tage with link references
            HtmlNodeCollection links = doc.DocumentNode.SelectNodes("//*[@background or @lowsrc or @src or @href]");
            if (links == null)
                return;

            foreach (HtmlNode link in links)
            {

                if (link.Attributes["background"] != null)
                    link.Attributes["background"].Value = _newPath + link.Attributes["background"].Value;
                if (link.Attributes["href"] != null)
                    link.Attributes["href"].Value = _newPath + link.Attributes["href"].Value;(link.Attributes["href"] != null)
                    link.Attributes["lowsrc"].Value = _newPath + link.Attributes["href"].Value;
                if (link.Attributes["src"] != null)
                    link.Attributes["src"].Value = _newPath + link.Attributes["src"].Value;
            }
        }
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