本文提供了一些简单的应用程序,它演示了C#如何使用MapPoint SDK,以及如何在SmartPhone上显示地图。
介绍
在业界迅速迁移到移动领域以获取相关利润的过程中,基于位置的服务和应用很明显领先一步。在技术前端,微软已经在所有这些相关技术领域中建立了牢固的地位。
对于基于位置的应用程序来说,新的MapPoint SDK 3.5提供了一个XML Web服务,使我们能够建立起基于位置的服务。这个SDK帮助我们获取高质量的地图,该地图还标识出了特定的位置(例如pizza店、医院等),还提供了到达目把地点的路线图。你可以下载这个SDK。
在移动(Mobility)操作系统方面,的SmartPhone和PPC为微软建立起强大的地位。
在本文中,我们将基于MapPoint SDK,使用C#建立一些简单的应用程序。我们将先在微软SmartPhone上显示一个指定地点的地图。
我们先介绍一下MapPoint。MapPoint暴露了四个Web服务:
1.查找服务--帮助我们定位地址、检索经纬度、地理实体。
2.显示服务--这个服务允许我们显示指定地址的地图,并设置被显示地图的大小和视图。同时,我们还可以设定"图钉",可以作为阅读器的可视化标记。
3.路线服务--这个服务允许我们生成路线、计算两个地点之间的距离并提供驾车方向。
4.通用服务--它是一些工具,是上述的三个Web服务公用部分。提供一些服务,例如国家信息和地图数据源信息。
如果要使用MapPoint Web服务,你就必须获得一个开发者帐号。点击这个链接进行注册。你可以注册并收到一个评估帐号,如果你是MSDN订户,就可以收到为期1年的免费订阅。
好了,下面我们进行代码分析。
我会分解应用程序的代码。但是我强烈推荐你阅读MapPoint SDK的基础知识。解释这些相同的内容是重复的,没有增加任何价值。
public static void GetAddress(Address address, string DataSourceName, out indResults Location, out ViewByHeightWidth[] Views) { try { FindServiceSoap locationService = new FindServiceSoap(); locationService.Credentials = new System.Net.NetworkCredential(_mapPointUserName,_mapPointPassword); locationService.PreAuthenticate = true; FindAddressSpecification locationData = new FindAddressSpecification(); locationData.DataSourceName = DataSourceName; locationData.InputAddress = address; Location = locationService.FindAddress(locationData); Views = new ViewByHeightWidth[1]; Views[0] = Location.Results[0].FoundLocation.BestMapView.ByHeightWidth; } catch(Exception ex) { throw new Exception(ex.Message,ex); } } |
public static Bitmap GetMap(FindResults Location, ViewByHeightWidth[] Views,string DataSourceName, Point MapDimensions) { try { RenderServiceSoap renderService = new RenderServiceSoap(); Pushpin[] pushpins = new Pushpin[1]; MapSpecification mapSpec = new MapSpecification(); renderService.Credentials = new System.Net.NetworkCredential(_mapPointUserName, _mapPointPassword); renderService.PreAuthenticate = true; pushpins[0] = new Pushpin(); pushpins[0].IconDataSource = "MapPoint.Icons"; pushpins[0].IconName = "0"; pushpins[0].Label = Location.Results[0].FoundLocation.Entity.Name; pushpins[0].LatLong = Views[0].CenterPoint; pushpins[0].ReturnsHotArea = true; mapSpec.DataSourceName = DataSourceName; mapSpec.Views = Views; mapSpec.Pushpins = pushpins; mapSpec.Options = new MapOptions(); mapSpec.Options.Format = new ImageFormat(); mapSpec.Options.Format.Width = MapDimensions.X; mapSpec.Options.Format.Height = MapDimensions.Y; MapImage[] mapImages = renderService.GetMap(mapSpec); System.IO.Stream streamImage = new System.IO.MemoryStream(mapImages[0].MimeData.Bits); Bitmap bitmap = new Bitmap(streamImage); return bitmap; } catch(Exception ex) { throw new Exception(ex.Message,ex); } } |
计算路线和距离
下面我们将查找两个地址之间的路线,并计算它们之间的距离。
下载并打开项目解决方案。打开MapPointWrapper.cs并用你自己的MapPoint用户名和密码代替_mapPointUserName和_mapPointPassword常量字符串。
Form1.cs包含一个Menu对象,它获取被显示地图的地址详细信息。
public static LatLong GetAddress(Address address, string DataSourceName, out FindResults Location, out ViewByHeightWidth[] Views) { try { FindServiceSoap locationService = new FindServiceSoap(); locationService.Credentials = new System.Net.NetworkCredential(_mapPointUserName, _mapPointPassword); locationService.PreAuthenticate = true; FindAddressSpecification locationData = new FindAddressSpecification(); locationData.DataSourceName = DataSourceName; locationData.InputAddress = address; Location = locationService.FindAddress(locationData); Views = new ViewByHeightWidth[1]; Views[0] = Location.Results[0].FoundLocation.BestMapView.ByHeightWidth; return Location.Results[0].FoundLocation.LatLong; } catch(Exception ex) { throw new Exception(ex.Message,ex); } } |
public static double GetMapForRoute(out Bitmap[] RouteMaps, out ViewByHeightWidth[] Views, LatLong[] LatitudeLongitude, string DataSourceName, Point MapDimension) { RouteServiceSoap routeService = new RouteServiceSoap(); routeService.Credentials = new System.Net.NetworkCredential(_mapPointUserName,_mapPointPassword); routeService.PreAuthenticate = true; UserInfoRouteHeader routeUserInfo = new UserInfoRouteHeader(); routeUserInfo.DefaultDistanceUnit = DistanceUnit.Kilometer; routeService.UserInfoRouteHeaderValue = routeUserInfo; MapOptions mapOptions = new MapOptions(); mapOptions.Format = new ImageFormat(); mapOptions.Format.Width = MapDimension.X; mapOptions.Format.Height = MapDimension.Y; Route route; route = routeService.CalculateSimpleRoute(LatitudeLongitude, DataSourceName, SegmentPreference.Quickest); int MapDirectionLength = route.Itinerary.Segments[0].Directions.Length + 1; Views = new ViewByHeightWidth[MapDirectionLength]; RouteMaps = new Bitmap[MapDirectionLength]; Pushpin[] pushpins = new Pushpin[MapDirectionLength]; for (int idx = 0; idx <= MapDirectionLength-1; idx++) { pushpins[idx] = new Pushpin(); pushpins[idx].IconDataSource = "MapPoint.Icons"; if(idx != MapDirectionLength-1) { Views[idx] = route.Itinerary.Segments[0].Directions[idx].View.ByHeightWidth; pushpins[idx].IconName = "0"; pushpins[idx].LatLong = route.Itinerary.Segments[0].Directions[idx].LatLong; } else { Views[idx] = route.Itinerary.Segments[1].Directions[0].View.ByHeightWidth; pushpins[idx].IconName = "1"; pushpins[idx].LatLong = route.Itinerary.Segments[1].Directions[0].LatLong; } pushpins[idx].ReturnsHotArea = true; } MapSpecification MapSpec = new MapSpecification(); MapSpec.DataSourceName = DataSourceName; MapSpec.Options = mapOptions; MapSpec.Views = Views; MapSpec.Pushpins = pushpins; MapSpec.Route = route; MapImage[] MapImages; RenderServiceSoap renderService = new RenderServiceSoap(); renderService.Credentials = new System.Net.NetworkCredential(_mapPointUserName,_mapPointPassword); renderService.PreAuthenticate = true; MapImages = renderService.GetMap(MapSpec); for (int idx = 0; idx < MapDirectionLength; idx++) { RouteMaps[idx] = new Bitmap(new System.IO.MemoryStream(MapImages[idx].MimeData.Bits)); } return route.Itinerary.Segments[0].Distance; } |