Question

我有类似的东西

<div class='mainclass subclass1' quest-id='123'> </div>
<div class='mainclass subclass2' quest-id='234'> </div>
<input quest-id='3236'> </input>
<textarea quest-id='256'> </textarea>

我希望所有div的quest-d属于所有输入和textarea的名为subclass1，subclass2和quest-id的类。我怎样才能在c＃中使用html agility pack？

我有这样的c＃代码：

HtmlDocument document = new HtmlDocument();
document.LoadHtml(obj.NewPage.Content);

HtmlNode htmlRootElement = document.DocumentNode.SelectSingleNode("/html");
HtmlNode bodyElement = htmlRootElement.SelectSingleNode("body");

我不知道如何继续

Answer 1

这是我编写和测试的片段。

 const string sampleHTML = @"<div class='mainclass subclass1' quest-id='123'></div>
    <div class='mainclass subclass2' quest-id='234'></div>
    <input quest-id='3236'> </input>
    <textarea quest-id='256'> </textarea>";


 HtmlAgilityPack.HtmlDocument myDoc = new HtmlAgilityPack.HtmlDocument();
 myDoc.LoadHtml(sampleHTML);
 HtmlNodeCollection foundNodes = myDoc.DocumentNode.SelectNodes("/div[contains(@class, 'subclass2')]");                                                                         
 MessageBox.Show(foundNodes[0].Attributes["quest-id"].Value);

当我运行代码段时，我看到了值＆＃39; 234＆＃39;在消息框中。

Answer 2

以下XPath可以从此问题中发布的样本html获取所有quest-id值：

//div[contains(@class, 'subclass1') or contains(@class, 'subclass2')]
| //input[@quest-id] 
| //textarea[@quest-id]

工作示例：

var html = @"<root><div class='mainclass subclass1' quest-id='123'> </div>
<div class='mainclass subclass2' quest-id='234'> </div>
<input quest-id='3236'> </input>
<textarea quest-id='256'> </textarea></root>";
var doc = new HtmlDocument();
doc.LoadHtml(html);

var nodes = 
    doc.DocumentNode
       .SelectNodes("//div[contains(@class, 'subclass1') or contains(@class, 'subclass2')]"
                        + " | //input[@quest-id] "
                        + " | //textarea[@quest-id]");
foreach (var node in nodes)
{
    Console.WriteLine(node.GetAttributeValue("quest-id", ""));
}

Answer 3

 string id = div.GetAttributeValue("id", "").ToString();
 string name= div.GetAttributeValue("name", "").ToString();

如何使用html agility pack获取c＃中html文件的html元素的id？

3 个答案: