用Data source-specific APIs 编程

ArcGIS Server APIs
SOAP
1)XML-structured 语言。
2) 对 server objects 和 server object extensions 可用。
3) 设计用作 stateless 交互。
4)Catalog 请求由 IServerCatalogAdmin 接口处理。
5)Service 请求由 IRequestHandler 接口处理。
ArcObjects
1) 远程与 GIS Server 上的 ArcObjects 交互。
2) 使用客户端的 Primary Interop Assemblies (PIA) 和 object libraries 。
3) 通过 SOM 访问获得 ArcGIS Server services 。
4) 设计用作 stateless 和 stateful 交互。

ArcGIS Server MapResource 类型

A 、 MapResourceInternet – 连接到 Web service endpoint

B 、 MapResourceLocal – 连接到 Server Object Manager

1) 访问 ServerContext

2) 使用 ArcObjects

ArcGIS Server Internet: SOAP 编程

1)MapResourceInternet

MapServerProxy, 访问 value objects

2) 通讯是 stateless

3) 使用 pooled objects

Dim mapRes as ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceInternet

mapRes = gisFunc.Resource

Dim mapsProxy as ArcGISServer.MapServerProxy = mapRes.MapServerProxy

Dim mapInfo as ArcGISServer.MapServerInfo =

mapsProxy.GetServerInfo(mapsProxy.GetDefaultMapName())

Dim mapDesc as ArcGISServer.MapDescription = mapInfo.DefaultMapDescription

Dim mLayerInfo as ArcGIServer.MapLayerInfo()

mLayerInfo = mapRes.MapServerInfo.MapLayerInfos

Dim layerDescs as ArcGISServer.LayerDescription()

layerDescs = mapDesc.LayerDescriptions

ArcGIS Server Local: ArcObjects 编程

1) 远程访问 ArcObjects

2)MapServerLocal

MapServer > IMapServer (COM) >IMapServerObjects (COM)

3) 通过 .NET 部件访问高级的 functionality

Dim mapFunc as IMapFunctionality = Map1.GetFunctionality(0)

Dim ags_mr as ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal

ags_mr =

CType(mapFunc.Resource,ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal)

' Access the ArcObjects COM ServerObject directly

Dim mapServer as ESRI.ArcGIS.Carto. IMapServer = CType(ags_mr.MapServer,IMapServer)

Dim mapServerObjs as ESRI.ArcGIS.Carto.IMapServerObjects

mapServerObjs = CType(mapServer,IMapServerObjects)

Dim map as ESRI.ArcGIS.Carto.IMap = mapServerObjs.Map

' Now perform more ArcObjects operations

Dim featClass as IFeatureClass = CType(map.Layers(0)).FeatureClass,

深入 ArcGIS Server Local API

1)MapResourceLocal

通过 DCOM 访问 server 上的 ArcObjects

ServerContext

2) 所有的过程在远程完成

    --首先建立连接

Identity identity = new Identity("username", "pwd", "domain");
AGSServerConnection connection = new AGSServerConnection("fmc-pca187", identity);
connection.Connect();

--获得服务器对象

IServerObjectManager m_pSOM = connection. ServerObjectManager ;
IServerContext m_pServerContext = m_pSOM. CreateServerContext (" testMap" , "MapServer" ) ;
IMapServer pMapServer = m_pServerContext . ServerObject　　as IMapServer ;

--使用服务器对象

IMapServerObject s pMapServerObject s = ( IMapServerObject s) pMapServer ;
IMap pMap = pMapServerObject s. get_Map (pMapServer .DefaultMapName) ;
IFeatureLayer p FLayer = ( IFeatureLayer) pMap. get_Layer(0) ;
IFeatureClass p FeatureClass = p FLayer . FeatureClass ;
int i = p FeatureClass. FeatureCount (null) ; 

--释放服务器对象

m_pServerContext . ReleaseContext () ;