从 Web 下载文件 (PDF)

Question

我是 VBA 的新手。 如何使用 UrlDownloadToFile 从http://cetatenie.just.ro/wp-content/uploads/ 下载 PDF 文件？

有人可以帮忙吗？该代码正在搜索 PDF 文件 udner 超链接并在某些条件下匹配它们，即他们名称下的当前年份。

Function UrlDownloadToFile(lNum As Long, sUrl As String, sPath As String, _
                           lNum1 As Long, lNum2 As Long) As Long

    UrlDownloadToFile = 0

    End Function

---

    Sub DownPDF()
    ' This macro downloads the pdf file from webpage
    ' Need to download MSXML2 and MSHTML parsers and install

    Dim sUrl As String
    Dim xHttp As MSXML2.XMLHTTP
    Dim hDoc As MSHTML.HTMLDocument
    Dim hAnchor As MSHTML.HTMLAnchorElement
    Dim Ret As Long
    Dim sPath As String
    Dim i As Long

    sPath = "C:\Documents and Settings\ee28118\Desktop\"
    sUrl = "http://cetatenie.just.ro/wp-content/uploads/"

    'Get the directory listing
    Set xHttp = New MSXML2.XMLHTTP
    xHttp.Open "GET", sUrl
    xHttp.send

    'Wait for the page to load
    Do Until xHttp.readyState = 4
        DoEvents
    Loop

    'Put the page in an HTML document
    Set hDoc = New MSHTML.HTMLDocument
    hDoc.body.innerHTML = xHttp.responseText

    'Loop through the hyperlinks on the directory listing
    For i = 0 To hDoc.getElementsByTagName("a").Length - 1
        Set hAnchor = hDoc.getElementsByTagName("a").Item(i)

        'test the pathname to see if it matches your pattern
        If hAnchor.pathname Like "Ordin-*.2013.pdf" Then
            Ret = UrlDownloadToFile(0, sUrl & hAnchor.pathname, sPath, 0, 0)

            If Ret = 0 Then
                Debug.Print sUrl & hAnchor.pathname & " downloaded to " & sPath
            Else
                Debug.Print sUrl & hAnchor.pathname & " not downloaded"
            End If
        End If
    Next i

    End Sub

Answer 1

抱歉 - 我应该猜到 URLDownloadToFile 是一个 API 调用，可以在 SQL "%" equivalent in VBA 回答整个问题。

完全删除名为 URLDownloadToFile 的函数。将此粘贴到您的示例过程所在的模块顶部

Private Declare Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" _
    (ByVal pCaller As Long, _
    ByVal szURL As String, _
    ByVal szFileName As String, _
    ByVal dwReserved As Long, _
    ByVal lpfnCB As Long) As Long

现在将 Sample 中的那一行更改为如下所示

Ret = URLDownloadToFile(0, sUrl & hAnchor.pathname, sPath & hAnchor.pathname, 0, 0)

那么你应该很高兴。如果您想要一些不同的文件名，那么您必须编写一些逻辑来在每次迭代时更改它。