使用类/标签名称提取数据并限制结果

Question

我正在尝试抓取以下网站：https://echa.europa.eu/brief-profile/-/briefprofile/100.047.293#ScientificProperties

到目前为止，我有以下代码返回每个 h4 标记的内部文本。

Sub getContents()
        
            Dim XMLReq As New MSXML2.XMLHTTP60
            Dim HTMLDoc As New MSHTML.HTMLDocument
            
            Dim SubTag As MSHTML.IHTMLElementCollection
            Dim SubName As MSHTML.IHTMLElement
            
            XMLReq.Open "Get", "https://echa.europa.eu/brief-profile/-/briefprofile/100.047.293", False
            XMLReq.send
            
            If XMLReq.Status <> 200 Then
            
                MsgBox "Problem" & vbNewLine & XMLReq.Status & " - " & XMLReq.statusText
                Exit Sub
            End If
            
            HTMLDoc.body.innerHTML = XMLReq.responseText
            
            Set SubTag = HTMLDoc.getElementsByTagName("dt")
            
            For Each SubName In SubTag
            Debug.Print SubName.innerText
            Next SubName
            
        End Sub

虽然这会返回很多有用的信息，但它也会返回一个标签名称为dt 的元素，有些结果是不想要的（突出显示），但我不确定如何限制这个列表。探索 HTML 似乎没有任何标签/ID 来区分这些。这也让我想知道我是否以最好的方式提取信息？

类似地，如果对于列表中每个未突出显示的项目，我希望在页面上捕获与它们关联的值，例如

C Physical state at 20°C and 1013 hPa Solid (100%) [1]
C Form Crystalline (100%) [1]
C Odour Other (100%) [1]
C Substance type Organic (100%) [1]
    
    And so on...

此信息的标签名称是“dd”，但我不确定如何同时返回两个结果。我希望在即时窗口中，我可以获得物理和化学属性的列表，并且每个值的右侧也会返回值。

尝试这样做我有以下导致不匹配错误的代码，但我不明白我做错了什么。

Sub getContents()
        
            Dim XMLReq As New MSXML2.XMLHTTP60
            Dim HTMLDoc As New MSHTML.HTMLDocument
            
            Dim SubTag As MSHTML.IHTMLElementCollection
            Dim SubName As MSHTML.IHTMLElement
            Dim SubInfo As MSHTML.IHTMLElement
            
            XMLReq.Open "Get", "https://echa.europa.eu/brief-profile/-/briefprofile/100.047.293", False
            XMLReq.send
            
            If XMLReq.Status <> 200 Then
            
                MsgBox "Problem" & vbNewLine & XMLReq.Status & " - " & XMLReq.statusText
                Exit Sub
            End If
            
            HTMLDoc.body.innerHTML = XMLReq.responseText
            
            Set SubTag = HTMLDoc.getElementsByTagName("dt")
            Set SubInfo = SubTag.tags("dd")
            
            For Each SubName In SubTag
            Debug.Print SubName.innerText, SubInfo.innerText
            Next SubName
            
        End Sub

我很欣赏它的长帖子，但如果有人可以评论我做错了什么，那就太好了。

更新：

以下代码更好地在即时窗口中获得所需的数据。

Sub GetContents()
    
        Dim XMLReq As New MSXML2.XMLHTTP60
        Dim HTMLDoc As New MSHTML.HTMLDocument
        
        Dim SubSectList As MSHTML.IHTMLElement
        Dim SubSects As MSHTML.IHTMLElementCollection
        Dim SubSect As MSHTML.IHTMLElement
    
        XMLReq.Open "Get", "https://echa.europa.eu/brief-profile/-/briefprofile/100.047.293", False
        XMLReq.send
        
        If XMLReq.Status <> 200 Then
        
            MsgBox "Problem" & vbNewLine & XMLReq.Status & " - " & XMLReq.statusText
            Exit Sub
        End If
        
        HTMLDoc.body.innerHTML = XMLReq.responseText
        
        Set SubSectList = HTMLDoc.getElementsByClassName("col-xs-12 col-lg-10 MainContent")(1)
        Set SubSects = SubSectList.getElementsByTagName("dt")

        'Debug.Print SubSects.Length
        
        For Each SubSect In SubSects
        Debug.Print SubSect.innerText & " : "; SubSect.NextSibling.innerText
       Next SubSect
 
    End Sub

Answer 1

我认为您想限制为 EndpointContent 类元素的子元素的 dt；然后你可以链接 nextSibling 移动到相邻的 dd

Option Explicit

Public Sub GetContents()
    Dim XMLReq As New MSXML2.XMLHTTP60
    Dim HTMLDoc As New MSHTML.HTMLDocument
        
    XMLReq.Open "Get", "https://echa.europa.eu/brief-profile/-/briefprofile/100.047.293", False
    XMLReq.send
                  
    HTMLDoc.body.innerHTML = XMLReq.responseText

    Dim i As Long
    
    With HTMLDoc.querySelectorAll(".EndpointContent dt")
        For i = 0 To .Length - 1
            Debug.Print .Item(i).innerText & " : " & .Item(i).NextSibling.NextSibling.innerText
            Debug.Print
        Next
    End With
End Sub