[mapguide-users] Load Layer Definition XML

[wordsy]

Thanks for the quick response.  It was exactly what I needed.

Cheers!


Kenneth Skovhede, GEOGRAF A/S wrote:
> 
> If you want to modify the layer xml, you just read the xml like this:
> 
> MgByteReader rd = resourceSrvc.GetResource(new 
> MgResourceIdentifier("Library://layer.LayerDefinition"));
> 
> If you want to work seriously with layerdefinitions (and the MapGuide 
> xml), I have created the MaestroAPI,
> which lets you manipulate classes instead of xml:
> http://trac.osgeo.org/mapguide/wiki/maestro/MaestroAPI
> 
> Using the MaestroAPI, you can just do:
> LayerDefinition ldef = 
> con.GetLayerDefinition("Library://layer.LayerDefinition");
> VectorLayerDefinition vldef = ldef.Item as VectorLayerDefinition;
> foreach(VectorScaleRangeType vsr in vldef.ScaleRanges)
>     foreach(object o in vsr.Item)
>        if (o is PointTypeStyleType)
>           ; //Layer has points
>        else if (o is LineTypeStyleType)
>           ; //Layer has lines
>        else if (o is AreaTypeStyleType)
>           ; //Layer has polygons
> 
> 
> Also, changing a style is easy, eg:
> PointTypeStyleType point = vldef.ScaleRanges[0].Item[0] as 
> PointTypeStyleType;
> p.PointRule[0].Label.BackgroundColor = System.Drawing.Color.Red;
> 
> Then save:
> con.SaveResource(ldef);
> 
> All is fully intellisense supported in VS.
> 
> 
> Regards, Kenneth Skovhede, GEOGRAF A/S
> 
> 
> 
> wordsy skrev:
>> Hey Everyone;
>>
>> Fairly new to MGOS.
>>
>> Here is what I am trying to do.  
>>
>> I have a map with many Layers.  One of my requirements is to allow users
>> to
>> be able to change the layer styles via a web wizard.  The user will be
>> able
>> to adjust certain styles for line/point/polygon (surface).  Ie font,
>> symbol,
>> line thickness, color etc.
>>
>> Already my site allows a user to select the layer they want to change,
>> then
>> change the styles for a point only.  The changing doesn't seem to be a
>> problem right now.
>>
>> The problem I have:
>>
>> Once a user selects the layer they want to load.  How would I get the
>> layer
>> and use XML document or XPATH or something to allow the users edit XML
>> nodes.
>>
>> Here is my code that checks to see what layer type I have when the user
>> selects the layer.  I have 3 different user controls (one for line, one
>> for
>> poly, one for line).  What I really want, is to load the layer and
>> populate
>> the appropriate controls inside the user control.
>>
>>  MgSiteConnection conn = InitializeGisWebTier();
>>             string resource = "Library://MUNICIPALITIES/" + Municipality
>> +
>> "/2_DATA/" + LayerName + ".FeatureSource";
>>
>>             MgResourceService svc =
>> (MgResourceService)conn.CreateService(MgServiceType.ResourceService );
>>
>>             // Populate some values that we will need.
>>             MgResourceIdentifier resourceId = new
>> MgResourceIdentifier(resource);              
>>             MgFeatureReader featureReader =
>> LayerDefinitionFactory.MakeAFeatureReader(conn, resourceId);                        
>>             
>>             // Find out what type of Geometric property the FeatureSource
>> we
>> uploaded has.
>>             string geometricPropertyType =
>> LayerDefinitionFactory.GetFeatureSourceGeometricPropertyType(featureReader);
>>
>>             switch (geometricPropertyType)
>>             {
>>                 case "SURFACE":
>>                     // We load the Polygon usercontrol
>>                     this.phStylizeLayerControl.Controls.Add(new
>> PolygonStyleBuilder());
>>                     break;
>>                 case "POINT":
>>                     // we load the point usercontrol
>>                     //this.phStylizeLayerControl.Controls.Add(new
>> PointStyleBuilder());
>>                     PointStyleBuilder control =
>> (PointStyleBuilder)LoadControl("~/Pages/Controls/PointStyleBuilder.ascx");
>>                     this.phStylizeLayerControl.Controls.Add(control);
>>                     txtSymbol.Enabled = true;
>>                     txtSymbolSize.Enabled = true;
>>                     break;
>>                 case "CURVE":
>>                     // we load the line user control
>>                     this.phStylizeLayerControl.Controls.Add(new
>> LineStyleBuilder());
>>                     break;
>>             }
>>
>> Thanks for any help in advance.
>>   
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> 
> 

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