excel - 使用 VBA 方法通过 Bing API 获取距离

Question

当我使用此方法时，我正在尝试通过 VBA 创建一个方法，它显示 #NAME？有时是#value。

Public Function DISTANCE(start As String, dest As String, key As String)
    
    Dim firstVal As String, secondVal As String, lastVal As String
    
    firstVal = "http://dev.virtualearth.net/REST/V1/Routes/Driving?wp.0="
    secondVal = "&wp.1=destinations="
    lastVal = "&optimize=time&routePathOutput=Points&distanceUnit=km&output=xml&key=" & key
    
    Set objHTTP = CreateObject("MSXML2.ServerXMLHTTP")
    
    URL = firstVal & start & secondVal & dest & lastVal
        
    objHTTP.Open "GET", URL, False
    objHTTP.SetRequestHeader "User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"
    objHTTP.Send ("")
    DISTANCE = Round(Round(WorksheetFunction.FilterXML(objHTTP.ResponseText, "//TravelDistance"), 3) * 1.609, 0)
    
End Function

Answer 1

三件事。

您需要以小写形式传入和传出位置，以及状态的 2 个字母缩写

以上需要urlencoded

响应有一个您需要添加的默认命名空间。对于后者，我求助于使用 MSXML2.DOMDocument 以便能够添加命名空间。

Public Sub test()

    Debug.Print GetDistance("new york,ny", "miami,fl", "key")

End Sub

Public Function GetDistance(ByVal start As String, ByVal dest As String, ByVal key As String) As Long
    
    Dim firstVal As String, secondVal As String, lastVal As String, objHTTP As Object, url As String
    
    firstVal = "http://dev.virtualearth.net/REST/V1/Routes/Driving?wp.0="
    secondVal = "&wp.1=destinations="
    lastVal = "&optmz=time&routePathOutput=Points&distanceUnit=km&output=xml&key=" & key
    
    Set objHTTP = CreateObject("MSXML2.ServerXMLHTTP")
    
    url = firstVal & Application.EncodeURL(LCase$(start)) & secondVal & Application.EncodeURL(LCase$(dest)) & lastVal
    
    objHTTP.Open "GET", url, False
    objHTTP.setRequestHeader "User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"
    objHTTP.send

    Dim xmlDoc As MSXML2.DOMDocument60 'reference to Microsoft XML via VBE>Tools>References
    
    Set xmlDoc = New MSXML2.DOMDocument60
    xmlDoc.LoadXML objHTTP.responseText
    xmlDoc.SetProperty "SelectionNamespaces", "xmlns:r='http://schemas.microsoft.com/search/local/ws/rest/v1'"

    GetDistance = Round(Round(xmlDoc.SelectSingleNode("//r:TravelDistance").Text, 3) * 1.609, 0)
    
End Function