我一直在使用以下代码从网络读取文本文件：
'import the text file into a string
Function DownloadTextFile(URL As String) As String
On Error GoTo Err_GetFromWebpage
Dim objWeb As Object
Dim strXML As String
' Instantiate an instance of the web object
Set objWeb = CreateObject("Microsoft.XMLHTTP")
' Pass the URL to the web object, and send the request
objWeb.Open "GET", URL, False
objWeb.send
' Look at the HTML string returned
strXML = objWeb.responseText
DownloadTextFile = strXML
End_GetFromWebpage:
' Clean up after ourselves!
Set objWeb = Nothing
Exit Function
Err_GetFromWebpage:
' Just in case there's an error!
MsgBox Err.Description & " (" & Err.Number & ")"
Resume End_GetFromWebpage
End Function
它第一次工作正常，但是当我对文本文件进行更改时，它没有反映在返回的字符串中。就好像 Excel 正在缓存文件一样。我可以做什么来解决这个问题？谢谢！
除了设置请求标头之外，按照@dee的建议，我还将“Microsoft.XMLHTTP”更改为“Msxml2.ServerXMLHTTP”，现在它可以工作了！这是最终的代码：
'import the text file into a string
Function DownloadTextFile(URL As String) As String
On Error GoTo Err_GetFromWebpage
Dim objWeb As Object
Dim strXML As String
' Instantiate an instance of the web object
Set objWeb = CreateObject("Msxml2.ServerXMLHTTP")
' Pass the URL to the web object
objWeb.Open "GET", URL, False
'don't cache the file
objWeb.setRequestHeader "Content-Type", "text/xml"
objWeb.setRequestHeader "Cache-Control", "no-cache"
objWeb.setRequestHeader "Pragma", "no-cache"
'send the request
objWeb.send
' Look at the HTML string returned
strXML = objWeb.responseText
DownloadTextFile = strXML
End_GetFromWebpage:
' Clean up after ourselves!
Set objWeb = Nothing
Exit Function
Err_GetFromWebpage:
' Just in case there's an error!
MsgBox Err.Description & " (" & Err.Number & ")"
Resume End_GetFromWebpage
End Function
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