[mapguide-users] Adding a point to a map... PLZ Help!!! (.NET -C#)
Galois
amihalas at yahoo.gr
Thu Oct 16 05:59:13 EDT 2008
No, I just was informed that all the points we have are generated
dynamically.
For example from the position of a car on the highway...
I really don't know what I am doing wrong.
Galois wrote:
>
> I have a DB with coordinates, but how am I going to put these coordinates
> in a layer. Even from AutoDesk...?
>
>
>
>
>
> Kenneth Skovhede, GEOGRAF A/S wrote:
>>
>> I still can't tell which of the two scenarios you are aiming at.
>>
>> So you have a highway, and some points on the highway.
>>
>> I'm thinking that the points should be created before the user starts to
>> do anything.
>> Does it make sense to convert the data into a database with X and Y
>> columns, before even thinking about what MapGuide does?
>> You can make a little batch job that updates the database if you prefer,
>> still without use of MapGuide.
>>
>> Once you have such a database, set it up in Studio or Maestro like a
>> regular layer.
>> Add the layer to the map, but make it invisible if you only want to show
>> it in some cases.
>>
>> Now, during runtime, you can create a copy of the LayerDefinition, and
>> insert a "filter" on the layer.
>> This will allow you to control what points a specific user sees.
>> Now save this copy of the LayerDefinition to the Session store.
>> The update the layer in the runtime map to point to the Session based
>> LayerDefinition, and set the layer visible.
>> Now save the runtime map, and issue a refresh on the client.
>>
>> I can't tell from your code fragments what goes wrong, but there is no
>> map.Save(...) call present, which is
>> how you would save the changes to the map. There is no
>> "getMap().Refresh()" call present, which must be issued
>> on the client in Javascript.
>>
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>>
>>
>> Galois skrev:
>>> You are wright about the confusion...
>>>
>>> Anyway, the scenario is the following:
>>>
>>> I have a map with the Highway of two Italian Cities.
>>> Firstly, I would like to display some points of interest on that map.
>>> Those points I have them in an XML file.
>>>
>>> So, my problem till now, is that I add a new layer on my map ( I see in
>>> debug mode that my map's Layers has increased ) but this layer doesn't
>>> appear in the page.
>>> If I solve this thing I'll try to add the points to this layer.
>>> Also, keep in mind that these points of interest, there might be static
>>> or
>>> not.
>>> This means that there is no point to create all this from Autodesk
>>> manually...
>>>
>>> Thank you (both) for the help!
>>>
>>>
>>>
>>>
>>>
>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>
>>>> I agree with Maksim, there seems to be some confusion as to what you
>>>> want to do.
>>>> There are two basic scenarios:
>>>>
>>>> 1. You want to display some points based on context.
>>>> An example would be searching for hotels in a certain price interval,
>>>> and the opening a map with the hotels shown.
>>>>
>>>> 2. You want to display a number of points, but the data changes more or
>>>> less frequently.
>>>> An example of this would be position of vehicles.
>>>>
>>>> A combination would be to show the position of vehicles that are using
>>>> diesel engines.
>>>>
>>>> Could you elaborate on what your scenario is like?
>>>>
>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>
>>>>
>>>>
>>>> Maksim Sestic skrev:
>>>>
>>>>> Hmm, if you're attending to batch-process large number of points
>>>>> (along
>>>>> with
>>>>> attached data) then web service calling FDO directly will do it much
>>>>> more
>>>>> efficiently, since you can preset it on server side to poke exact
>>>>> datastore/schema (thus skipping enumeration). Especially if you're
>>>>> planning
>>>>> to parse some client-side file holding actual information. Other way
>>>>> round
>>>>> you'll be making too many client-server roundtrips.Of couse, it all
>>>>> depends
>>>>> on the overall setup...
>>>>>
>>>>> -----Original Message-----
>>>>> From: mapguide-users-bounces at lists.osgeo.org
>>>>> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Galois
>>>>> Sent: Wednesday, October 15, 2008 16:29
>>>>> To: mapguide-users at lists.osgeo.org
>>>>> Subject: RE: [mapguide-users] Adding a point to a map... PLZ Help!!!
>>>>> (.NET
>>>>> -C#)
>>>>>
>>>>>
>>>>> This is not a solution, cause at the feature, I'll have lot of XML
>>>>> files
>>>>> and
>>>>> the code will have to work in order to put all the interest points
>>>>> automatic
>>>>> on the map....
>>>>>
>>>>> ThanX anyway :-D
>>>>>
>>>>>
>>>>>
>>>>> Maksim Sestic wrote:
>>>>>
>>>>>
>>>>>> If the MG->Datastore approach is making you headaches, why don't you
>>>>>> directly access the datastore (i.e. via FDO if it's managed after
>>>>>> all)
>>>>>> and store the point there "manually"? Of course, if you're poking it
>>>>>> from a client you'll have to establish a web service to do the job on
>>>>>> the server side. And don't forget to call MG refresh method from
>>>>>> JavaScript once you have that point within a datastore.
>>>>>>
>>>>>> Regards,
>>>>>> Maksim Sestic
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: mapguide-users-bounces at lists.osgeo.org
>>>>>> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Galois
>>>>>> Sent: Wednesday, October 15, 2008 16:15
>>>>>> To: mapguide-users at lists.osgeo.org
>>>>>> Subject: Re: [mapguide-users] Adding a point to a map... PLZ Help!!!
>>>>>> (.NET
>>>>>> -C#)
>>>>>>
>>>>>>
>>>>>> Maybe I'm stupid....
>>>>>>
>>>>>> I cannot do it work. I have reconstruct the whole thing, but the new
>>>>>> Layer doesn't appear in the page.
>>>>>>
>>>>>> I followed the Dev's Guide in order to create a Layer and add it in
>>>>>> the map but nothing.
>>>>>>
>>>>>> Basically, I added these three functions. I really would appreciate
>>>>>> if
>>>>>> u could give me some help..
>>>>>>
>>>>>>
>>>>>> public MgLayer addLayerRsc2Map(MgResourceIdentifier layerResId,
>>>>>> MgResourceService resourceSrvc, string layerName, string
>>>>>> layerLegendLabel, MgMap map)
>>>>>> {
>>>>>> //MgLayer newLayer = new MgLayer(layerResId, resourceSrvc);
>>>>>> MgLayer newLayer = new MgLayer(layerResId , resourceSrvc);
>>>>>>
>>>>>> //Add the new layer to the map's layer collection
>>>>>> newLayer.SetName(layerName);
>>>>>> newLayer.SetVisible(true);
>>>>>> newLayer.SetLegendLabel(layerLegendLabel);
>>>>>> newLayer.SetDisplayInLegend(true);
>>>>>> MgLayerCollection layerCollection = map.GetLayers();
>>>>>> if( !layerCollection.Contains(layerName) )
>>>>>> {
>>>>>> //Insert the new layer to position 0 so it is at
>>>>>> //the top of the drawing order
>>>>>> layerCollection.Insert(0,newLayer);
>>>>>> }
>>>>>> MgLayerGroupCollection skata = map.GetLayerGroups();
>>>>>> return newLayer;
>>>>>> }
>>>>>>
>>>>>>
>>>>>> public MgLayer addLayerDef2Map(string layerDefinition, string
>>>>>> layerName, string layerLegendLabel, string sessionId,
>>>>>> MgResourceService resourceSrvc, MgMap map )
>>>>>> {
>>>>>> // Adds the layer definition (XML) to the map.
>>>>>> // Returns the layer.
>>>>>>
>>>>>> //Validate the XML.
>>>>>> XmlDocument domDocument = new XmlDocument();
>>>>>> domDocument.LoadXml(layerDefinition);
>>>>>> domDocument.PreserveWhitespace = true;
>>>>>> MemoryStream stream = new System.IO.MemoryStream();
>>>>>> domDocument.Save(stream);
>>>>>>
>>>>>> Byte[] byteArray = stream.ToArray();
>>>>>> string outerXml =
>>>>>> System.Text.Encoding.UTF8.GetString(byteArray,
>>>>>> 0,
>>>>>> byteArray.Length);
>>>>>> byteArray = System.Text.Encoding.UTF8.GetBytes(outerXml);
>>>>>>
>>>>>> //Save the new layer definition to the Session.
>>>>>> MgByteSource byteSource = new MgByteSource(byteArray ,
>>>>>> byteArray.Length);
>>>>>> byteSource.SetMimeType(MgMimeType.Xml);
>>>>>> MgResourceIdentifier resourseId = new
>>>>>> MgResourceIdentifier("Session:" + map.SessionId + "//" + layerName +
>>>>>> "." + MgResourceType.LayerDefinition);
>>>>>>
>>>>>> // Set the map with the new resource
>>>>>> resourceSrvc.SetResource(resourseId, byteSource.GetReader(),
>>>>>> null);
>>>>>>
>>>>>>
>>>>>> MgLayer newLayer = addLayerRsc2Map(resourseId, resourceSrvc,
>>>>>> layerName, layerLegendLabel, map);
>>>>>> return newLayer;
>>>>>> }
>>>>>>
>>>>>>
>>>>>>
>>>>>> public void addLayer2Group(MgLayer layer, string layerGroupName,
>>>>>> string layerGroupLegendLabel, MgMap map)
>>>>>> // Adds a layer to a layer group. If necessary, it creates
>>>>>> // the layer group.
>>>>>> {
>>>>>> //Get the layer group
>>>>>> MgLayerGroup layerGroup;
>>>>>> MgLayerGroupCollection layerGroupCollection =
>>>>>> map.GetLayerGroups();
>>>>>> if( layerGroupCollection.Contains(layerGroupName) )
>>>>>> {
>>>>>> layerGroup =
>>>>>> layerGroupCollection.GetItem(layerGroupName);
>>>>>> }
>>>>>> else
>>>>>> {
>>>>>> //It does not exist, so create it.
>>>>>> layerGroup = new MgLayerGroup(layerGroupName);
>>>>>> layerGroup.SetVisible(true);
>>>>>> layerGroup.SetDisplayInLegend(true);
>>>>>> layerGroup.SetLegendLabel(layerGroupLegendLabel);
>>>>>> layerGroupCollection.Add(layerGroup);
>>>>>> }
>>>>>> //Add the layer to the group.
>>>>>> layer.SetGroup(layerGroup);
>>>>>> }
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>
>>>>>>
>>>>>>> Did you look at the buffer sample code in the AJAX viewer?
>>>>>>> It does exactly what is required, besides inserting your points.
>>>>>>>
>>>>>>> About your code:
>>>>>>> You do not use the "resourceIdentifier" variable, which means your
>>>>>>> layer might reference something else.
>>>>>>> You save the layers to the regular repository, which is fine, but
>>>>>>> each use will overwrite the previous copy, making it impossible to
>>>>>>> reliably serve more than one user.
>>>>>>> You do not add the layer to the runtime map, and you do not save the
>>>>>>> runtime map.
>>>>>>>
>>>>>>> You write: "I just want to display them".
>>>>>>> Well, MapGuide works by displaying data from a FeatureSource, styled
>>>>>>> through a LayerDefinition.
>>>>>>> You cannot insert data in the LayerDefinition, it must be in a
>>>>>>> FeatureSource.
>>>>>>>
>>>>>>> If you insert the data in an existing FeatureSource, with an
>>>>>>> existing
>>>>>>> layer, that is fine too, but I cannot guess that is what you want.
>>>>>>>
>>>>>>> You did not mention an Xml file with points before, just a single
>>>>>>> point.
>>>>>>>
>>>>>>> Depending on your data, you may want to insert them into a database
>>>>>>> (like Sqlite or Access), or into an SDF file.
>>>>>>> If you choose the database version, your FeatureSource can be of
>>>>>>> type
>>>>>>> ODBC.
>>>>>>>
>>>>>>> If you use a database, you can insert the points using regular SQL
>>>>>>> queries against the database.
>>>>>>> If the points are persistent (that is, not tied to a particular
>>>>>>> users
>>>>>>> map, like session values), you can just create a FeatureSource +
>>>>>>> Layer through Maestro or Studio without requirering any code.
>>>>>>>
>>>>>>> If you are looking to create something similar to "Points of
>>>>>>> interrest"
>>>>>>> with a nice little flag, you might
>>>>>>> consider using OpenLayers instead of the AJAX viewer:
>>>>>>> http://www.openlayers.org/
>>>>>>> http://www.openlayers.org/dev/examples/georss-markers.html
>>>>>>> (OpenLayers also supports MapGuide as the backend server)
>>>>>>>
>>>>>>>
>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Galois skrev:
>>>>>>>
>>>>>>>
>>>>>>>> First of all, thank u fro your reply.
>>>>>>>>
>>>>>>>> I don't get why should I create a temp layer.
>>>>>>>> I have some coordinates in an XML file, and I just want to display
>>>>>>>> them on an existing layer.
>>>>>>>>
>>>>>>>> Though I tried to create a new layer, it does not appear in my maps
>>>>>>>> layers.
>>>>>>>>
>>>>>>>> That's what I did...
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> MgResourceIdentifier resourceIdentifier = new
>>>>>>>> MgResourceIdentifier("Library://GoSpatial/Data/airports.FeatureSource");
>>>>>>>> MgResourceIdentifier layerResId = new
>>>>>>>> MgResourceIdentifier("Library://GoSpatial/Layers/TmpLayer.LayerDefin
>>>>>>>> i
>>>>>>>> tion");
>>>>>>>>
>>>>>>>>
>>>>>>>> string layerDefinition =
>>>>>>>> File.ReadAllText("C:/Inetpub/wwwroot/iwaygis/TmpLayer.LayerDefinitio
>>>>>>>> n
>>>>>>>> .xml");
>>>>>>>>
>>>>>>>>
>>>>>>>> MgByteReader reader = new MgByteReader(layerDefinition,
>>>>>>>> "text/xml");
>>>>>>>>
>>>>>>>> resourceSrvc.SetResource(layerResId, reader, null);
>>>>>>>>
>>>>>>>>
>>>>>>>> tmpLayer = new MgLayer(layerResId, resourceSrvc);
>>>>>>>> tmpLayer.SetName("TempLayer");
>>>>>>>> tmpLayer.SetLegendLabel("TempLayer");
>>>>>>>> tmpLayer.SetDisplayInLegend(true);
>>>>>>>> tmpLayer.SetSelectable(true);
>>>>>>>>
>>>>>>>> MgLayerCollection layers = map.GetLayers();
>>>>>>>> layers.Insert(0, tmpLayer);
>>>>>>>> tmpLayer.SetVisible(true);
>>>>>>>> tmpLayer.ForceRefresh();
>>>>>>>>
>>>>>>>> Thx!
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>> A few steps are involved:
>>>>>>>>>
>>>>>>>>> 1. Create a temporary featuresource 2. Create a temporary layer to
>>>>>>>>> display the features 3. Insert the temporary layer into the
>>>>>>>>> runtime
>>>>>>>>> map
>>>>>>>>>
>>>>>>>>> The buffer files in the MapGuide viewer has template code for all
>>>>>>>>> three steps.
>>>>>>>>> All steps are explained in the Developer Guide (PDF version at
>>>>>>>>> least).
>>>>>>>>>
>>>>>>>>> You might also want to look here:
>>>>>>>>> http://trac.osgeo.org/mapguide/wiki/CodeSamples/ASP.Net/ScribbleApp
>>>>>>>>>
>>>>>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Galois skrev:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Hello,
>>>>>>>>>>
>>>>>>>>>> I´m trying to add a point to a map but I have no idea how to it.
>>>>>>>>>>
>>>>>>>>>> I have declare the map object, and also I create a point with
>>>>>>>>>> it's
>>>>>>>>>> coordinates.
>>>>>>>>>>
>>>>>>>>>> But I don't know what is the next step that I have to do...
>>>>>>>>>>
>>>>>>>>>> The code follows....
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> public partial class _Default : System.Web.UI.Page {
>>>>>>>>>> public string sessionId;
>>>>>>>>>> public string webLayout;
>>>>>>>>>>
>>>>>>>>>> protected void Page_Load(object sender, EventArgs e)
>>>>>>>>>> {
>>>>>>>>>> string physicalPath = @"C:\Program
>>>>>>>>>> Files\MapGuideOpenSource\WebServerExtensions\www\webconfig.ini";
>>>>>>>>>>
>>>>>>>>>> try
>>>>>>>>>> {
>>>>>>>>>> MapGuideApi.MgInitializeWebTier(physicalPath);
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> passAndSession();
>>>>>>>>>>
>>>>>>>>>> //Associate a session ID with the MgSiteConnection
>>>>>>>>>> Object
>>>>>>>>>> MgUserInformation userInfo_new = new
>>>>>>>>>> MgUserInformation(sessionId);
>>>>>>>>>>
>>>>>>>>>> MgSiteConnection siteConnection = new
>>>>>>>>>> MgSiteConnection();
>>>>>>>>>>
>>>>>>>>>> siteConnection.Open(userInfo_new);
>>>>>>>>>>
>>>>>>>>>> MgResourceService resourceSrvc =
>>>>>>>>>> (MgResourceService)siteConnection.CreateService(MgServiceType.Reso
>>>>>>>>>> u
>>>>>>>>>> rceService);
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> MgMap map = new MgMap(siteConnection);
>>>>>>>>>>
>>>>>>>>>> webLayout =
>>>>>>>>>> "Library://GoSpatial/Web+Layouts/Autostrada+Brescia+Padova+Map.Web
>>>>>>>>>> L
>>>>>>>>>> ayout";
>>>>>>>>>>
>>>>>>>>>> MgResourceIdentifier resId = new
>>>>>>>>>> MgResourceIdentifier("Library://GoSpatial/Maps/Italy
>>>>>>>>>> Map.MapDefinition");
>>>>>>>>>>
>>>>>>>>>> String mapName = resId.GetName();
>>>>>>>>>>
>>>>>>>>>> MgResourceIdentifier mapStateId = new
>>>>>>>>>> MgResourceIdentifier("Session:" + sessionId + "//" + mapName +
>>>>>>>>>> "."
>>>>>>>>>> + MgResourceType.Map);
>>>>>>>>>>
>>>>>>>>>> map.Create(resourceSrvc, resId, mapName);
>>>>>>>>>>
>>>>>>>>>> map.Save(resourceSrvc, mapStateId);
>>>>>>>>>>
>>>>>>>>>> map.Open(resourceSrvc, mapName);
>>>>>>>>>>
>>>>>>>>>> createPoint();
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> }
>>>>>>>>>> catch (Exception ex)
>>>>>>>>>> {
>>>>>>>>>> throw (ex);
>>>>>>>>>> }
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> public string passAndSession()
>>>>>>>>>> {
>>>>>>>>>> MgUserInformation userInfo = new
>>>>>>>>>> MgUserInformation("Administrator",
>>>>>>>>>> "admin");
>>>>>>>>>>
>>>>>>>>>> MgSite site = new MgSite();
>>>>>>>>>>
>>>>>>>>>> site.Open(userInfo);
>>>>>>>>>>
>>>>>>>>>> sessionId = site.CreateSession();
>>>>>>>>>> return sessionId;
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> public MgPoint createPoint()
>>>>>>>>>> {
>>>>>>>>>> MgGeometryFactory geometryFactory = new
>>>>>>>>>> MgGeometryFactory();
>>>>>>>>>>
>>>>>>>>>> MgCoordinateXY coordinate = (MgCoordinateXY)
>>>>>>>>>> geometryFactory.CreateCoordinateXY(10.913161, 45.408046);
>>>>>>>>>>
>>>>>>>>>> MgPoint point = geometryFactory.CreatePoint(coordinate);
>>>>>>>>>> return point;
>>>>>>>>>> }
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> mapguide-users mailing list
>>>>>>>>> mapguide-users at lists.osgeo.org
>>>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> mapguide-users mailing list
>>>>>>> mapguide-users at lists.osgeo.org
>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>> .NET--
>>>>>> -C-%29-tp19954532p19994399.html
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>>>>>>
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>>>>>>
>>>>>>
>>>>>>
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>>>>>
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