考慮操作類型從Bing Maps解析XML

Question

我有一個代碼可以從Bing Maps解析XML，並在其中解析行程點。 有趣的是，當我進行視覺展示時，我發現Bing的行為異常。 因此，有時它可以使我在沒有十字路口的直路上獲得積分。 這對我的應用程序來說是個問題，因為我獲得的積分超出了應有的水平。

問題 ：我想消除標記： ManouverType為keepStraight或continueRoute的點。

XML看起來像這樣

<ItineraryItem>
<TravelMode>Driving</TravelMode>
<TravelDistance>0.586</TravelDistance>
<TravelDuration>66</TravelDuration>
<ManeuverPoint>
<Latitude>46.086102</Latitude>
<Longitude>19.679518</Longitude>
</ManeuverPoint>
<Instruction maneuverType="EnterThenExitRoundabout">At roundabout, take 1st exit onto Ulica Bajnatska</Instruction>
<CompassDirection>west</CompassDirection>
<Detail>
<ManeuverType>EnterRoundabout</ManeuverType>
<StartPathIndex>2</StartPathIndex>
<EndPathIndex>4</EndPathIndex>
<CompassDegrees>208</CompassDegrees>
<Mode>Driving</Mode>
<PreviousEntityId>0</PreviousEntityId>
<NextEntityId>0</NextEntityId>
<RoadType>Arterial</RoadType>
</Detail>
<Detail>
<ManeuverType>ExitRoundabout</ManeuverType>
<StartPathIndex>4</StartPathIndex>
<EndPathIndex>8</EndPathIndex>
<Name>Ulica Bajnatska</Name>
<CompassDegrees>250</CompassDegrees>
<Mode>Driving</Mode>
<PreviousEntityId>0</PreviousEntityId>
<NextEntityId>0</NextEntityId>
<RoadType>Arterial</RoadType>
</Detail>
...

我的代碼看起來像這樣

 public List<CGeoPoint> GetItin(CGeoPair latlongpair)
    {
        string RequestText = CreateRequest(latlongpair.GeoPoint1, latlongpair.GeoPoint2);
        XmlDocument locationsResponse = MakeRequest(RequestText);

        List<CGeoPoint>  itin  = new List<CGeoPoint>();

        XmlNodeList nList = locationsResponse.GetElementsByTagName("ManeuverPoint");

        foreach (XmlNode node in nList)
        {
            decimal d1 = decimal.Parse(node.ChildNodes[0].InnerText);
            decimal d2 = decimal.Parse(node.ChildNodes[1].InnerText);

            CGeoPoint ll = new CGeoPoint(d1, d2);
            itin.Add(ll);
      }
      return itin;
    }  

這段代碼為我的每個ItineraryItem返回了緯度和經度

Answer 1

好的，我用以下方法解決了這個問題：

public List<CGeoPoint> GetItin(CGeoPair latlongpair)
    {
        string RequestText = CreateRequest(latlongpair.GeoPoint1, latlongpair.GeoPoint2);

        XmlDocument locationsResponse = MakeRequest(RequestText);
        //Create namespace manager
        XmlNamespaceManager nsmgr = new XmlNamespaceManager(locationsResponse.NameTable);
        nsmgr.AddNamespace("rest", "http://schemas.microsoft.com/search/local/ws/rest/v1");

        //Ovde kupim sve Itinerere čak i početnu i krajnju tačku. to se kasnije izbacuje
        XmlNodeList locationElements = locationsResponse.SelectNodes("//rest:ItineraryItem", nsmgr);

        List<CGeoPoint> itin = new List<CGeoPoint>();
        foreach (XmlNode location in locationElements)
        {
            decimal lat = decimal.Parse(location.SelectSingleNode(".//rest:Latitude", nsmgr).InnerText);
            decimal longit = decimal.Parse(location.SelectSingleNode(".//rest:Longitude", nsmgr).InnerText);
            string mantype = location.SelectSingleNode(".//rest:ManeuverType", nsmgr).InnerText;
            mantype = mantype.ToUpper();

            if (mantype == "KEEPSTRAIGHT" || mantype == "CONTINUEROUTE")
            {
                //Do nothing... jump over
            }
            else
            {
                CGeoPoint ll = new CGeoPoint(lat, longit);
                itin.Add(ll);
            }
        }
        return itin;
    }