提前感谢您的帮助。我正在运行Windows 8.1，我有最新的IE / Chrome浏览器和最新的Excel。我试图编写一个从StackOverflow（https://stackoverflow.com/tags）中提取数据的Excel宏。具体来说，我试图提取日期（运行宏），标签名称，标签数量以及标签的简要说明。我让它适用于表格的第一页，但不适用于其他页面（目前有1132页）。现在，它每次运行宏时都会覆盖数据，而且我不确定如何在运行之前让它查找下一个空单元格。最后，我试图让它自动运行一次周。
我非常感谢这里的任何帮助。问题是：
代码（目前为止）如下。谢谢！
Enum READYSTATE
READYSTATE_UNINITIALIZED = 0
READYSTATE_LOADING = 1
READYSTATE_LOADED = 2
READYSTATE_INTERACTIVE = 3
READYSTATE_COMPLETE = 4
End Enum
Sub ImportStackOverflowData()
'to refer to the running copy of Internet Explorer
Dim ie As InternetExplorer
'to refer to the HTML document returned
Dim html As HTMLDocument
'open Internet Explorer in memory, and go to website
Set ie = New InternetExplorer
ie.Visible = False
ie.navigate "http://stackoverflow.com/tags"
'Wait until IE is done loading page
Do While ie.READYSTATE <> READYSTATE_COMPLETE
Application.StatusBar = "Trying to go to StackOverflow ..."
DoEvents
Loop
'show text of HTML document returned
Set html = ie.document
'close down IE and reset status bar
Set ie = Nothing
Application.StatusBar = ""
'clear old data out and put titles in
'Cells.Clear
'put heading across the top of row 3
Range("A3").Value = "Date Pulled"
Range("B3").Value = "Keyword"
Range("C3").Value = "# Of Tags"
'Range("C3").Value = "Asked This Week"
Range("D3").Value = "Description"
Dim TagList As IHTMLElement
Dim Tags As IHTMLElementCollection
Dim Tag As IHTMLElement
Dim RowNumber As Long
Dim TagFields As IHTMLElementCollection
Dim TagField As IHTMLElement
Dim Keyword As String
Dim NumberOfTags As String
'Dim AskedThisWeek As String
Dim TagDescription As String
'Dim QuestionFieldLinks As IHTMLElementCollection
Dim TodaysDate As Date
Set TagList = html.getElementById("tags-browser")
Set Tags = html.getElementsByClassName("tag-cell")
RowNumber = 4
For Each Tag In Tags
'if this is the tag containing the details, process it
If Tag.className = "tag-cell" Then
'get a list of all of the parts of this question,
'and loop over them
Set TagFields = Tag.all
For Each TagField In TagFields
'if this is the keyword, store it
If TagField.className = "post-tag" Then
'store the text value
Keyword = TagField.innerText
Cells(RowNumber, 2).Value = TagField.innerText
End If
If TagField.className = "item-multiplier-count" Then
'store the integer for number of tags
NumberOfTags = TagField.innerText
'NumberOfTags = Replace(NumberOfTags, "x", "")
Cells(RowNumber, 3).Value = Trim(NumberOfTags)
End If
If TagField.className = "excerpt" Then
Description = TagField.innerText
Cells(RowNumber, 4).Value = TagField.innerText
End If
TodaysDate = Format(Now, "MM/dd/yy")
Cells(RowNumber, 1).Value = TodaysDate
Next TagField
'go on to next row of worksheet
RowNumber = RowNumber + 1
End If
Next
Set html = Nothing
'do some final formatting
Range("A3").CurrentRegion.WrapText = False
Range("A3").CurrentRegion.EntireColumn.AutoFit
Range("A1:C1").EntireColumn.HorizontalAlignment = xlCenter
Range("A1:D1").Merge
Range("A1").Value = "StackOverflow Tag Trends"
Range("A1").Font.Bold = True
Application.StatusBar = ""
MsgBox "Done!"
End Sub
答案 0 :(得分：1)
当他们通过数据资源管理器等方式为您提供基础数据时，无需刮掉Stack Overflow。在数据资源管理器中使用此查询可以获得所需的结果：
select t.TagName, t.Count, p.Body
from Tags t inner join Posts p
on t.ExcerptPostId = p.Id
order by t.count desc;
该查询的固定链接是here和＆＃34;下载CSV＆＃34;查询运行后出现的选项可能是将数据导入Excel的最简单方法。如果您想自动执行这部分内容，则直接链接到结果的CSV下载here
答案 1 :(得分：1)
您可以改进它以解析出确切的元素，但是它会循环所有页面并获取所有标签信息（标签旁边的所有内容）
Option Explicit
Public Sub ImportStackOverflowData()
Dim ie As New InternetExplorer, html As HTMLDocument
Application.ScreenUpdating = False
With ie
.Visible = True
.navigate "https://stackoverflow.com/tags"
While .Busy Or .READYSTATE < 4: DoEvents: Wend
Set html = .document
Dim numPages As Long, i As Long, info As Object, item As Object, counter As Long
numPages = html.querySelector(".page-numbers.dots ~ a").innerText
For i = 1 To 2 ' numPages ''<==1 to 2 for testing; use to numPages
DoEvents
Set info = html.getElementById("tags_list")
For Each item In info.getElementsByClassName("grid-layout--cell tag-cell")
counter = counter + 1
Cells(counter, 1) = item.innerText
Next item
html.querySelector(".page-numbers.next").Click
While .Busy Or .READYSTATE < 4: DoEvents: Wend
Set html = .document
Next i
Application.ScreenUpdating = True
.Quit '<== Remember to quit application
End With
End Sub
答案 2 :(得分：0)
我没有使用DOM，但我发现只需在已知标签之间进行搜索就很容易。如果您正在寻找的表达式太常见，只需稍微调整一下代码，以便在字符串后查找字符串）。
一个例子：
Public Sub ZipLookUp()
Dim URL As String, xmlHTTP As Object, html As Object, htmlResponse As String
Dim SStr As String, EStr As String, EndS As Integer, StartS As Integer
Dim Zip4Digit As String
URL = "https://tools.usps.com/go/ZipLookupResultsAction!input.action?resultMode=1&companyName=&address1=1642+Harmon+Street&address2=&city=Berkeley&state=CA&urbanCode=&postalCode=&zip=94703"
Set xmlHTTP = CreateObject("MSXML2.XMLHTTP")
xmlHTTP.Open "GET", URL, False
On Error GoTo NoConnect
xmlHTTP.send
On Error GoTo 0
Set html = CreateObject("htmlfile")
htmlResponse = xmlHTTP.ResponseText
If htmlResponse = Null Then
MsgBox ("Aborted Run - HTML response was null")
Application.ScreenUpdating = True
GoTo End_Prog
End If
'Searching for a string within 2 strings
SStr = "<span class=""address1 range"">" ' first string
EStr = "</span><br />" ' second string
StartS = InStr(1, htmlResponse, SStr, vbTextCompare) + Len(SStr)
EndS = InStr(StartS, htmlResponse, EStr, vbTextCompare)
Zip4Digit = Left(Mid(htmlResponse, StartS, EndS - StartS), 4)
MsgBox Zip4Digit
GoTo End_Prog
NoConnect:
If Err = -2147467259 Or Err = -2146697211 Then MsgBox "Error - No Connection": GoTo End_Prog 'MsgBox Err & ": " & Error(Err)
End_Prog:
End Sub