html - 使用Excel VBA从网页下载文件

Question

我正在尝试使用 VBA 从网站下载雨量计数据。

我找到了用户输入定义的雨量站编号。搜索完成后，我选择与雨量站对应的复选框的代码和数据格式不起作用。

当我手动执行此操作时，搜索完成后，我必须单击“Dados Convencionais”以显示搜索结果。我找不到在代码中执行此操作的方法。

Sub DownloadCSV()

Dim SearchString As String
Dim SearchBox As Object
Dim SearchButton As Object
Dim SelectionStationButton As Object
Dim SelectionCSVButton As Object
Dim DownloadButton As Object
Dim ie As New InternetExplorer

'User inputs station number
SearchString = InputBox("Input rain gauge station number", "Download data HidroWeb", "Station number- e.g. 02044054")

With ie
    .Visible = True
    .Navigate "http://www.snirh.gov.br/hidroweb/publico/medicoes_historicas_abas.jsf"

    While ie.ReadyState <> 4
    DoEvents
    Wend

    'Station number to be searched
    Set SearchBox = .Document.getElementById("form:fsListaEstacoes:codigoEstacao")
    SearchBox.Value = SearchString

    'Search button click
    Set SearchButton = .Document.getElementById("form:fsListaEstacoes:bt")
    SearchButton.Click

    'select checkbox beside the station number
    Set SelectionStationButton = .Document.getElementById("form:fsListaEstacoes:fsListaEstacoesC:j_idt178:table:0:ckbSelecionada")
    SelectionStationButton.Click

    'Select data format -  Arquivo Excel(.CSV)
    Set SelectionCSVButton = .Document.getElementById("form:fsListaEstacoes:fsListaEstacoesC:radTipoArquivo:2")
    SelectionCSVButton.Click

    'click download button
    Set DownloadButton = .Document.getElementById("form:fsListaEstacoes:fsListaEstacoesC:btBaixar")
    DownloadButton.Click

End With

End Sub

Answer 1

我已尽量接近您的原始代码。以下是一些步骤，其中缺少使下拉菜单出现的步骤，以便您可以选择格式等。

Option Explicit

Sub DownloadCSV()

    Dim SearchString As String
    Dim SearchBox As Object
    Dim SearchButton As Object
    Dim SelectionStationButton As Object
    Dim SelectionCSVButton As Object
    Dim DownloadButton As Object
    Dim ie As New InternetExplorer

    'User inputs station number
    SearchString = "02044054"                    'InputBox("Input rain gauge station number", "Download data HidroWeb", "Station number- e.g. 02044054")

    With ie
        .Visible = True
        .Navigate2 "http://www.snirh.gov.br/hidroweb/publico/medicoes_historicas_abas.jsf"

        While .Busy Or .readyState < 4: DoEvents: Wend

        'Station number to be searched
        Set SearchBox = .document.getElementById("form:fsListaEstacoes:codigoEstacao")
        SearchBox.Value = SearchString

        'Search button click
        Set SearchButton = .document.getElementById("form:fsListaEstacoes:bt")
        SearchButton.Click

        'click dropdown
        .document.querySelector("[href*=dadosConvencionais]").Click

        'select checkbox beside the station number
        .document.querySelector(".checkbox.i-checks i").Click

        'Select data format -  Arquivo Excel(.CSV)
        .document.querySelector("input[value='3']").Click

        'click download button
        .document.querySelector("[id='form:fsListaEstacoes:fsListaEstacoesC:btBaixar']").Click

        Application.Wait Now + TimeSerial(0, 0, 10)
        .Quit
    End With

End Sub