[mapguide-users] Regarding - Set Feature Label at Run Time

Kenneth Skovhede, GEOGRAF A/S ks at geograf.dk
Thu Mar 5 08:36:53 EST 2009


Yes, that is how it's supposed to be.
If you want to assign the label style, you must set many of the required 
properties for a
label style object:

ar.Label = new TextSymbolType();
ar.Label.BackgroundColor = System.Drawing.Color.FromArgb(0, 
System.Drawing.Color.White); //Transparent
ar.Label.ForegroundColor = System.Drawing.Color.Black;
ar.Label.Unit = LengthUnitType.Points;
ar.Label.SizeX = "12";
ar.Label.SizeY = "12";
ar.Label.FontName = "Arial";

I think those are the required ones, but I have not tested it.

Regards, Kenneth Skovhede, GEOGRAF A/S



ravinder.singh at BIRLASOFT.COM skrev:
>
> Hi,
>
>  
>
> I have tried it and written the following code. It works if I 
> check(select) the Display feature Labels in Label Style Dialog Box(in 
> maestro) and even don’t set any property, but It does not work if I 
> don’t check the Display feature Labels.
>
>  
>
> Means if there is text “None”  set in Label Style  in Area Style then 
> it does not work , otherwise it works by simply checking the Display 
> feature Labels in Label Style Dialog Box.
>
>  
>
> That’s why in your example code, this code “if (ar.Label != null)” is 
> written.
>
>  
>
> But my problem is that I do have Only Area style defined in maestro , 
> but I have not defined any property as feature label. So I don’t want 
> to check the  Display feature Labels checkbox, To Generate the dynamic 
> label I tried to write my commented line of code (c#), but does not work.
>
>  
>
> Please If can be done ?
>
>  
>
>   foreach (VectorScaleRangeType vsr in 
> vectorLayerDefinition1.VectorScaleRange)
>
>             {
>
>                 foreach (object o in vsr.Items)
>
>                 {
>
>                     if (o is AreaTypeStyleType)
>
>                     {
>
>                         AreaTypeStyleType ast = o as AreaTypeStyleType;
>
>                         if (ast.AreaRule != null)
>
>                         {
>
>                             foreach (AreaRuleType ar in ast.AreaRule)
>
>                             {
>
>                                       //Code to Create the label at 
> run time
>
>    //====================================
>
>                                 //TextSymbolType txtSymb = new 
> TextSymbolType();
>
>                                 //txtSymb.Text = "MY_PROPERTY_NAME";
>
>                                 //ar.Label = txtSymb;       
>
>   //====================================                       
>
>                                 if (ar.Label != null)
>
>                                 {
>
>                                     ar.Label.Text = "MY_PROPERTY_NAME ";
>
>                                 }
>
>                             }
>
>                         }
>
>                     }
>
>                 }
>
>             }                       
>
>  
>
> *Thanks & Regards,*
>
> Ravinder
>
> ------------------------------------------------------------------------
>
> *From:* mapguide-users-bounces at lists.osgeo.org 
> [mailto:mapguide-users-bounces at lists.osgeo.org] *On Behalf Of *Kenneth 
> Skovhede, GEOGRAF A/S
> *Sent:* Thursday, March 05, 2009 1:12 PM
> *To:* MapGuide Users Mail List
> *Subject:* Re: [mapguide-users] Regarding - Set Feature Label at Run Time
>
>  
>
> That is a bit difficult for two reasons.
> 1) The MapGuide style model is fairly large, so there are many 
> subitems to examine
> 2) The styles for Point, Line and Area don't share the same 
> properties, so they must be handled individually.
>
> I have put up an example on how to do this here:
> http://trac.osgeo.org/mapguide/wiki/maestro/MaestroAPI/samples/IterateLayerRules
>
>
> Regards, Kenneth Skovhede, GEOGRAF A/S
>
>
>
> ravinder.singh at BIRLASOFT.COM <mailto:ravinder.singh at BIRLASOFT.COM> skrev:
>
> Hi All,
>
>  
>
> I have to set a property as Feature Label for a layer at run time. I 
> got some hints and tried with VectorLayerDefinitionType and 
> TextSymbolType.But not able to do so as I don’t know the exact procedure.
>
>  
>
> I am using maestro api for creating run time map.
>
>  
>
> Please assist…
>
>  
>
> I am using c#, asp.net.
>
>  
>
>  
>
> *Thanks & Regards,*
>
> Ravinder
>
>  
>
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>
>  
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