从 Bing 地图解析 XML 考虑操作类型

本文关键字：操作 类型 XML Bing 地图 | 更新日期: 2023-09-27 18:37:05

我有一个代码，可以从Bing Maps解析XML，在那里我解析行程点。有趣的是，当我在视觉上显示时，我看到Bing的行为很奇怪。因此，它有时会在没有十字路口的笔直道路上给我积分。这对我的应用程序来说是一个问题，因为我获得的积分比我应该得到的要多。

问题：我想消除标签：ManouverType是keepStraight或continueRoute的点。

XML 如下所示 

<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>
...

我的代码看起来像这样 

 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;
    }

此代码返回了每个行程项的纬度和经度

从 Bing 地图解析 XML 考虑操作类型

好的

，我用以下方法解决了这个问题：

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;
    }
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