[mapguide-users] help
saloua wakrim
wakrimsaloua.wakrim at gmail.com
Tue May 26 11:18:00 EDT 2009
hi! thanks alot for your help, i found exemple in phpsamples explaining how
to get features from XMLSelection, i tried use it today, but i've prob wich
i don't understand:
i've prob with use the xml selection wich i get after user clic on polygone,
this is javascript function i use to get selection:(i write it in textfiel
and read it by Request.Form:
function test()
{
k= document.formulaire.classe.value=carte.GetMapFrame().GetSelectionXML();
}
for get this selection i use this code
selectionXml = getValue("classe")
Private Function getValue(ByVal champ As String) As String
' récupère la valeur du champ [champ] de la requête postée
' qq chose ?
If Request.Form(champ) Is Nothing Then Return ""
' on récupère la ou les valeurs du champ
Dim valeurs() As String = Request.Form.GetValues(champ)
Dim valeur As String = ""
Dim i As Integer
For i = 0 To valeurs.Length - 1
valeur += valeurs(i)
Next
valeur = Server.UrlDecode(valeur)
Return valeur
End Function
after user clic on polygone and get xml selection , i use this code for
filter and identify polygone ID:
Public Sub getselectionpartiel(ByVal map As MgMap, ByVal resourceService As
MgResourceService, ByVal XmlSel As String)
Dim k = 0
If ((XmlSel <> Nothing) And (XmlSel <> "")) Then
Dim selection As New MgSelection(map, XmlSel)
Dim Layers As MgReadOnlyLayerCollection = selection.GetLayers()
If Not Layers.GetCount = 1 Then
Response.Write("More than one object was selected")
Exit Sub
End If
Response.Write("calques selectionnés")
End If
End Sub
and i call this function like that:
getselectionpartiel(map, resourceSrvc, selectionXml)
it gives me this error:
"La référence d'objet n'est pas définie à une instance d'un objet." in the
line:
(the object reference is not associated to the object instance)
If Not Layers.GetCount = 1 Then
i think that Layers is empty but when i display "selectionXml" by using:
Response.Write(selectionXml) it gives me the correct selection!!!
if you have some idea about the error i do,please tell it me, thanks a lot
on advance
2009/5/26 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>
> The keyword for this is base64 encoding, see:
> http://lists.osgeo.org/pipermail/mapguide-users/2008-February/011245.html
> and
> http://www.mail-archive.com/mapguide-users@lists.osgeo.org/msg03312.html
>
> Regards, Kenneth Skovhede, GEOGRAF A/S
>
>
>
> saloua wakrim skrev:
>
> i resolved coordinates point prob and transparency layer, now i want
> identify polygone wich i draw on map by user clic, i use GetSelectionXml()
> when user select polygone, this function gives me:
>
> <?xml version="1.0" encoding="UTF-8"?><FeatureSet><Layer
> id="d610b562-ffff-ffff-8002-0016356155d0"><Class
> id="BufferLayerSchema:BufferClass"><ID>GQAAAA==</ID></Class></Layer></FeatureSet>
>
> i want understand how can i identify polygone (id polygone) by this
> description i think that i must use
> <ID>GQAAAA==</ID> cause i've remarked that all what it changes when i
> select another polygone, but i don't see the relation with
> <ID>GQAAAA==</ID> end the ID wich i associate to my polygone when i create
> it.there is any relation?? thanks a lot on advance.
>
> 2009/5/20 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>
>
>> UNIT is the coordinate system unit, eg. degrees, meters or inches.
>>
>> If the layers and map have the correct coordinate systems assigned,
>> MapGuide will automatically convert the data to display correctly,
>> so you get the correct map.
>>
>> You do not have to work with the projection string manually.
>> Beware of trying to calculate coordinates manually based on the UNIT,
>> because
>> projections are not always compatible just because the use the same UNIT.
>> Instead, use the MgCoordinateSystem classes to convert points from one
>> projection to another.
>>
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>>
>>
>>
>> saloua wakrim skrev:
>>
>> but please if you know what that UNIT means in coordinates System say it
>> me:
>>
>>
>> <
>> CoordinateSystem>GEOGCS["WGS84 Lat/Long's, Degrees, -180 ==>
>> +180",DATUM["D_WGS_1984",SPHEROID["World_Geodetic_System_of_1984",6378137,298.257222932867]],PRIMEM["Greenwich",0],
>> *UNIT*["Degree",0.017453292519943295]]</CoordinateSystem> cause i want
>> draw polygone representing view of cam (dome) and it must be proportional to
>> the real view of cam, and my layer must be added to map with another layer
>> wich contains cams so i must know wich units is used on map(m, km, cm) or
>> what? that what i do that i convert (m) to unit by this code:
>>
>> MgCoordinateSystemFactory
>> csFactory = new MgCoordinateSystemFactory(); MgCoordinateSystem srs =
>> csFactory.Create(map.GetMapSRS()); MgCoordinateSystemMeasure mesure = new
>> MgCoordinateSystemMeasure(srs);
>>
>> distanceunits = pointa.Distance(pointb, mesure);
>>
>> Response.Write(
>> "distance entre les deux points du calque en unit‚: "+distanceunits.ToString());
>>
>>
>> distancemeters = srs.ConvertCoordinateSystemUnitsToMeters(distanceunits);
>> but i don't know if this layer (wich contains polygone) will be compatible
>> with another layer or not? if you don't understand me say it me please.
>> thanks or advance, i ask you cause i remark that you master more than
>> onother mapguide developpers mapguide, thanks on advance.
>>
>> 2009/5/19 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>
>>
>>> There is an example for MgCreateSdfParams() in the
>>> "buffer.(php|aspx|jsp)" file in the folder
>>> C:\program
>>> files\MapGuideOpenSource2.0\WebServerExtensions\www\mapviewer(php|net|java)
>>>
>>> It also shows how to set the coordinate system.
>>> If your data has the correct projection, MapGuide will convert it to fit
>>> the map projection.
>>> If that does not work, you have to manually convert the items, which is
>>> not a trivial procedure.
>>>
>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>
>>>
>>>
>>>
>>> saloua wakrim skrev:
>>>
>>> hi! did you know lease how MgCreateSdfParams() works and what attributes
>>> i must give it cause ii think that the prob i have is coordinates i use for
>>> inserting polygone or line or point wich are not compatibl with map
>>> cordinates
>>>
>>> 2009/5/11, Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>:
>>>>
>>>> Yes, that looks right.
>>>>
>>>> You must also refresh the map (refresh/pan/zoom/etc.) in the browser via
>>>> javascript.
>>>>
>>>> In addition to my other suggestions, you can also check the error log
>>>> for messages.
>>>>
>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>
>>>>
>>>>
>>>>
>>>> saloua wakrim skrev:
>>>>
>>>> hi! please i want know if this code is that what all i must do for
>>>> adding new layer to map and see it in viewer frame or i must do some
>>>> relation with the feature source i create in my code?? thanks on advance
>>>>
>>>>
>>>> myLayer =
>>>> New MgLayer(layerDefId, resourceSrvc)
>>>>
>>>> myLayer.SetName(myLayerName)
>>>>
>>>> myLayer.SetLegendLabel(myLayerName)
>>>>
>>>> myLayer.SetDisplayInLegend(
>>>> True)
>>>>
>>>> myLayer.SetSelectable(
>>>> False)
>>>>
>>>> map.GetLayers().Insert(0, myLayer)
>>>>
>>>> myLayer.ForceRefresh()
>>>> map.Save(resourceSrvc)
>>>>
>>>>
>>>> 2009/5/10 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>
>>>>
>>>>> The code looks alright.
>>>>> Do you refresh the map afterwards?
>>>>> What is in the "insertResults" ?
>>>>> (There can be a hidden error, due to a bug in MapGuide)
>>>>> Are you sure that the LayerDefinition matches the FeatureSource?
>>>>> Try to create the FeatureSource and LayerDefinition in "Library://"
>>>>> instead,
>>>>> so you can examine the layer from Studio/Maestro.
>>>>>
>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> saloua wakrim skrev:
>>>>>
>>>>> i try the following code for displaying layer wich contains line in
>>>>> map, so i digitize a line, create temporary feature for this line, create a
>>>>> layer wich contains it and add it to the map. it doesn't give me some error
>>>>> but i can see the line in the map (i can draw it). Please help me. the code
>>>>> is following:
>>>>>
>>>>>
>>>>>
>>>>> String
>>>>> dataSource = "Session:" + sessionid1 + "//" + myLayerName +
>>>>> ".FeatureSource"; MgResourceIdentifier dataSourceId = new
>>>>> MgResourceIdentifier(dataSource); MgFeatureService featureSrvc = (
>>>>> MgFeatureService)siteConnection.CreateService(MgServiceType.FeatureService);
>>>>> if (DoesLayerExist(myLayerName, map) == false)
>>>>>
>>>>> {
>>>>>
>>>>>
>>>>> //create Feature Source MgClassDefinition myClassDef = new
>>>>> MgClassDefinition();
>>>>>
>>>>> myClassDef.SetName(myLayerName);
>>>>>
>>>>> myClassDef.SetDescription(myLayerName +
>>>>> " Feature Source");
>>>>>
>>>>> myClassDef.SetDefaultGeometryPropertyName(
>>>>> "SHPGEOM"); MgDataPropertyDefinition prop = new
>>>>> MgDataPropertyDefinition("KEY");
>>>>>
>>>>> prop.SetDataType(
>>>>> MgPropertyType.Int32);
>>>>>
>>>>> prop.SetAutoGeneration(
>>>>> true);
>>>>>
>>>>> prop.SetReadOnly(
>>>>> true);
>>>>>
>>>>> myClassDef.GetIdentityProperties().Add(prop);
>>>>>
>>>>> myClassDef.GetProperties().Add(prop);
>>>>>
>>>>> prop =
>>>>> new MgDataPropertyDefinition("ID");
>>>>>
>>>>> prop.SetDataType(
>>>>> MgPropertyType.Int32);
>>>>>
>>>>> myClassDef.GetProperties().Add(prop);
>>>>> MgGeometricPropertyDefinition geomProp = new
>>>>> MgGeometricPropertyDefinition("SHPGEOM");
>>>>>
>>>>> geomProp.SetGeometryTypes(
>>>>> MgFeatureGeometricType.Curve);
>>>>>
>>>>> myClassDef.GetProperties().Add(geomProp);
>>>>> MgFeatureSchema schema = new MgFeatureSchema(myLayerName + "Schema",
>>>>> myLayerName + "SchemaDesc");
>>>>>
>>>>> schema.GetClasses().Add(myClassDef);
>>>>> MgCreateSdfParams sdfParams = new MgCreateSdfParams("MGA-56 (GDA94 /
>>>>> MGA zone 56)", map.GetMapSRS(), schema);
>>>>>
>>>>> featureSrvc.CreateFeatureSource(dataSourceId, sdfParams);
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> //create layer //String layerDef = "Session:" + sessionid1 + "//" +
>>>>> myLayerName + ".LayerDefinition"; MgResourceIdentifier layerDefId =
>>>>> new MgResourceIdentifier(
>>>>> "Library://essaicalque/Redline.LayerDefinition");
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> MgByteSource content = new MgByteSource(@"C:\Program
>>>>> Files\MapGuideOpenSource\WebServerExtensions\www\essaiselect2\Layerdef.xml");
>>>>>
>>>>>
>>>>> resourceSrvc.SetResource(layerDefId, content.GetReader(),
>>>>> null); //code enlev‚ d'ici: ajouter layer resource … la carte //il
>>>>> faut ajouter l'autre code: add layer resource to map //DOMDocument
>>>>> domdoc = new DOMdocument(); MgLayerresult=add_layer_resource_to_map(layerDefId,resourceSrvc,myLayerName,myLayerName,map);
>>>>>
>>>>>
>>>>> }
>>>>> MgInsertFeatures insertFeatures = new MgInsertFeatures(myLayerName,
>>>>> makeLine("1", x0, y0, x1, y1)); MgFeatureCommandCollection commands =
>>>>> new MgFeatureCommandCollection();
>>>>>
>>>>> commands.Add(insertFeatures);
>>>>> int commandIndex = commands.IndexOf(insertFeatures);
>>>>> MgPropertyCollection insertResults;
>>>>>
>>>>> insertResults = featureSrvc.UpdateFeatures(dataSourceId, commands,
>>>>> false); MgLayer myLayer1 = map.GetLayers().GetItem(myLayerName) as
>>>>> MgLayer;
>>>>>
>>>>> myLayer1.ForceRefresh();
>>>>>
>>>>>
>>>>> //commands.Add(new MgInsertFeatures(myLayerName,makeLine("1", x0, y0,
>>>>> x1, y1)));
>>>>>
>>>>>
>>>>>
>>>>> map.Save(resourceSrvc);
>>>>>
>>>>>
>>>>>
>>>>> <
>>>>> script runat=server> Boolean result; MgPropertyCollection makeLine(
>>>>> String Name, Double x0, Double y0, Double x1, Double y1)
>>>>>
>>>>> {
>>>>> MgPropertyCollection PropertyCollection = new MgPropertyCollection();
>>>>> MgInt32Property nameProperty = new MgInt32Property("ID", 1);
>>>>>
>>>>> PropertyCollection.Add(nameProperty);
>>>>> MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
>>>>> MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter();
>>>>> MgGeometry geometry = wktReaderWriter.Read("LINESTRING XY (" + x0 + "
>>>>> " + y0 + "," + x1 + " " + y1 + ")") as MgLineString; //MgGeometry
>>>>> geometry = wktReaderWriter.Read("LINESTRING(3 4,10 50,20 25)") as
>>>>> MgLineString; MgByteReader geometryByteReader =
>>>>> agfReaderWriter.Write(geometry); MgGeometryProperty geometryProperty =
>>>>> new MgGeometryProperty("SHPGEOM", geometryByteReader);
>>>>>
>>>>> PropertyCollection.Add(geometryProperty);
>>>>> return PropertyCollection;
>>>>>
>>>>> }
>>>>>
>>>>> Boolean
>>>>> DoesLayerExist(String LayerName, MgMap Map)
>>>>>
>>>>> {
>>>>> MgLayerCollection layers = Map.GetLayers();
>>>>>
>>>>> result = (layers.Contains(myLayerName));
>>>>> return result;
>>>>>
>>>>> }
>>>>> MgLayer add_layer_resource_to_map(MgResourceIdentifierlayerresourceid,
>>>>> MgResourceService rs, String layername, String layerlegendlabel, MgMapmap)
>>>>>
>>>>> {
>>>>> MgLayer myLayer = new MgLayer(layerresourceid, rs);
>>>>>
>>>>> myLayer.SetName(layername);
>>>>>
>>>>> myLayer.SetLegendLabel(layerlegendlabel);
>>>>>
>>>>> myLayer.SetDisplayInLegend(
>>>>> true);
>>>>>
>>>>> myLayer.SetSelectable(
>>>>> true);
>>>>>
>>>>>
>>>>> if (!map.GetLayers().Contains(layername))
>>>>>
>>>>> {
>>>>>
>>>>> map.GetLayers().Insert(0, myLayer);
>>>>>
>>>>> }
>>>>>
>>>>> myLayer.SetVisible(
>>>>> true);
>>>>>
>>>>> myLayer.ForceRefresh();
>>>>>
>>>>> map.Save(resourceSrvc);
>>>>> return myLayer;
>>>>>
>>>>> }
>>>>>
>>>>> </
>>>>> script>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------
>>>>>
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>>>>>
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