You need to call the aspx page with the session id, either as a
querystring or as a post.
'Read setup from querystring or form
Dim sessionID As String = Request.Params("SESSIONID")
Dim mapdefinition As String = Request.Params("MAPDEFINITION")
Dim layername As String = Request.Params("LAYERNAME")
Dim newFilter As String = Request.Params("NEWFILTER")
'Replace "myserver" with the server name, or use "localhost"
Dim host As New Uri("http://myserver/mapguide/mapagent/mapagent.fcgi";)
Dim conn as ServerConnectionI = New HttpServerConnection(host, sessionID, "en",
true)
'Use the same naming system as the viewer, when reading the runtime map ID
Dim mapName as String = new ResourceIdentifier(mapdefinition).Name
Dim rtMapId as String = new ResourceIdentifier(mapName,
ResourceTypes.RuntimeMap, conn.SessionID)
'Load the runtime map
Dim rtMap as RuntimeClasses.RuntimeMap = conn.GetRuntimeMap(rtMapId)
Dim rtLayer as RuntimeClasses.RuntimeMapLayer = rtMap.Layers(layername)
'Get the current layer and assing the filter
Dim layerDefinition as LayerDefinition =
conn.GetLayerDefinition(rtLayer.ResourceId)
Dim vectorLayerDefinition as VectorLayerDefinitionType = layerDefinition.Item
vectorLayerDefinition.Filter = newFilter
'Save a copy of the layer, temporary, and random name
rtLayer.ResourceID = new ResourceIdentifier(Guid.NewGuid().ToString(),
ResourceTypes.LayerDefinition, conn.SessionID)
conn.SaveResourceAs(layerDefinition, rtLayer)
'Save the runtime map, pointing to the updated layerdefinition
conn.SaveRuntimeMap(rtMapId, rtMap)
'Tell the client to refresh
RegisterStartupScript("key", "<script>GetMapFrame().Refresh();</script>")
Regards, Kenneth Skovhede, GEOGRAF A/S
padmini godavarthi skrev:
Hi
iam using Mapguide opensource 2.0(with .net 2.0 +IIS 5.1)
Hi, We want modify dynamically a layer; for exemple, modify the filter of a
layer when the map is loaded;Is it possible ? What is the method : using an
API ?
can u give me the sample code in .net so that it will be very helpful to me
Regards,
Padmini.
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