[MAPSERVER-USERS] How TO change color of a layer using mapscript(without editing mapfile)

[Sucharita Samuel]

 Hi Yatendra,
                  To change the colour of a layer, you can create a
temporary layer, assign the attributes (like color,outline color etc) and
then add the shape to your existing layer and redraw the map image..
The following code might help,

 //*************Code for creating a temporary layer to be added onto the
existing map******

                    layerObj oTempLayer = new layerObj(map);
                    oTempLayer.type = MS_LAYER_TYPE.MS_LAYER_POLYGON;
                    oTempLayer.status = 1;
                    classObj oTempClass = new classObj(oTempLayer);
                    labelObj oLabel = oTempClass.label;
                    oLabel.color.setRGB(0,0,0);
                    styleObj oStyle = new styleObj(oTempClass);
                    oStyle.outlinecolor.setRGB(100, 12, 12);
                    oStyle.color.setRGB(221, 160, 221);
                    oTempLayer.addFeature(shape);
                    layer.close();
                    oImg = map.draw();
                    int i= oTempLayer.draw(map, oImg);

//*********************************************************************************

Regards,
Sucharita


On Fri, May 2, 2008 at 12:18 PM, yatendra <yatendra.jaiswal at gmail.com>
wrote:

>
> Hi
> Thanks for reply
> i tried this code but there is null reference in
> "$style->color->setRGB( 255, 0, 0 );
> $style->outlinecolor->setRGB( 255, 0, 0 );"
> this step....
> Please giude me...
> color of  a layer is not schanging
>
> Thanks Regards
>
>
> yatendra wrote:
> >
> > Hi friends,
> > I am using asp.net to develop application on mapserver.
> > I want to change layer color available in my mapfile.
> > Is it possible to change layer color without editing layer in mapfile?
> > What function do i need to use to do this?
> > Can i give unique value to each feature?
> > Is it also possible?
> > Please reply if any one know regarding this.
> > any idea will also be helpful to me...
> > Thanks regards
> >
>
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