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Lets start out by assuming that you have data in a database, because
the actions are more or less the same.<br>
In Studio or Maestro, create a new Featuresource (Dataconnection).<br>
Choose ODBC as the provider.<br>
Set up the page to match your ODBC information.<br>
Make sure you point out the X and Y columns on the page, to form
geometry.<br>
<br>
When done, save the featuresource.<br>
Then create a new layer, referencing the featuresource.<br>
You can now select the "GEOMETRY" column which is a placeholder for you
X/Y data.<br>
Save the layer, and preview it to make sure it works.<br>
<br>
Now create a map, and insert the layer.<br>
Save the map, and preview it just in case.<br>
<br>
Finally create a WebLayout and reference the map.<br>
<br>
Now go back and make the layer invisible in the map, and save it.<br>
Then try your code to turn it on.<br>
<br>
If you want to modify the map shown to the user, there are three things
that usually go wrong:<br>
1. You cannot access the runtime map before the map has loaded.<br>
If this is a requirement, state this explicitly in the question.<br>
<br>
2. You must call save on the runtime map after modifying it.<br>
<br>
3. The runtime map is NOT the same as the MapDefinition.<br>
<br>
If your data is dynamic, the easiest way to deal with it, is to just
update data from outside MapGuide.<br>
<br>
<pre class="moz-signature" cols="72">Regards, Kenneth Skovhede, GEOGRAF A/S
</pre>
<br>
<br>
Galois skrev:
<blockquote cite="mid:20010502.post@talk.nabble.com" type="cite">
<pre wrap="">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:
</pre>
<blockquote type="cite">
<pre wrap="">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:
</pre>
<blockquote type="cite">
<pre wrap="">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:
</pre>
<blockquote type="cite">
<pre wrap="">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:
</pre>
<blockquote type="cite">
<pre wrap="">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:
</pre>
<blockquote type="cite">
<pre wrap="">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: <a class="moz-txt-link-abbreviated" href="mailto:mapguide-users-bounces@lists.osgeo.org">mapguide-users-bounces@lists.osgeo.org</a>
[<a class="moz-txt-link-freetext" href="mailto:mapguide-users-bounces@lists.osgeo.org">mailto:mapguide-users-bounces@lists.osgeo.org</a>] On Behalf Of Galois
Sent: Wednesday, October 15, 2008 16:29
To: <a class="moz-txt-link-abbreviated" href="mailto:mapguide-users@lists.osgeo.org">mapguide-users@lists.osgeo.org</a>
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:
</pre>
<blockquote type="cite">
<pre wrap="">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: <a class="moz-txt-link-abbreviated" href="mailto:mapguide-users-bounces@lists.osgeo.org">mapguide-users-bounces@lists.osgeo.org</a>
[<a class="moz-txt-link-freetext" href="mailto:mapguide-users-bounces@lists.osgeo.org">mailto:mapguide-users-bounces@lists.osgeo.org</a>] On Behalf Of Galois
Sent: Wednesday, October 15, 2008 16:15
To: <a class="moz-txt-link-abbreviated" href="mailto:mapguide-users@lists.osgeo.org">mapguide-users@lists.osgeo.org</a>
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:
</pre>
<blockquote type="cite">
<pre wrap="">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:
<a class="moz-txt-link-freetext" href="http://www.openlayers.org/">http://www.openlayers.org/</a>
<a class="moz-txt-link-freetext" href="http://www.openlayers.org/dev/examples/georss-markers.html">http://www.openlayers.org/dev/examples/georss-markers.html</a>
(OpenLayers also supports MapGuide as the backend server)
Regards, Kenneth Skovhede, GEOGRAF A/S
Galois skrev:
</pre>
<blockquote type="cite">
<pre wrap="">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:
</pre>
<blockquote type="cite">
<pre wrap="">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:
<a class="moz-txt-link-freetext" href="http://trac.osgeo.org/mapguide/wiki/CodeSamples/ASP.Net/ScribbleApp">http://trac.osgeo.org/mapguide/wiki/CodeSamples/ASP.Net/ScribbleApp</a>
Regards, Kenneth Skovhede, GEOGRAF A/S
Galois skrev:
</pre>
<blockquote type="cite">
<pre wrap="">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;
}
}
</pre>
</blockquote>
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