Little Help - C#

[Ian Erickson]

Alright,

Got it working - Thanks!  The following code is what I ended up using - 
in case anyone else needs it.  Also, I noticed that the styleObj does 
not seem to work properly when using the symbolname property.  I was 
forced to user the symbol index instead.  Any reason why this might be?  
Code follows:

        mapObj m_obj = new mapObj(@"C:\base.map");

        layerObj layer = new layerObj(m_obj);
        layer.name = "PointLayer";
        layer.type = MS_LAYER_TYPE.MS_LAYER_POINT;
        layer.setProjection("init=epsg:4326");
        layer.status = 1;

        classObj c = new classObj(layer);
        c.name = "MARKER";
        c.label.type = MS_FONT_TYPE.MS_TRUETYPE;
        c.label.font = "arial";
        c.label.size = 7;
        c.label.color.setRGB(0, 0, 0);
        c.label.outlinecolor.setRGB(255, 255, 255);

        styleObj style = new styleObj(c);
        style.symbol = 7;
//        style.symbolname = "circle";
        style.antialias = 1;
        style.minsize = 12;
        style.maxsize = 12;
        style.size = 12;
        style.color.setRGB(192, 0, 0);
        style.outlinecolor.setRGB(255, 0, 0);

        imageObj i_obj = m_obj.draw();

        pointObj p = new pointObj(-111.4752, 33.377321, 0.0, 0.0);
        Console.WriteLine("p.x = " + p.x);
        Console.WriteLine("p.y = " + p.y);
       
        p.draw(m_obj, layer, i_obj, 0, "TEXT");

        p.Dispose();

        try
        {
            i_obj.save(@"C:\output.png",m_obj);
        }  catch (Exception e) 
        {
            Console.Writeln(e.printStackTrace());
         }



Sean Gillies wrote:

> On Dec 14, 2005, at 8:13 PM, Ian Erickson wrote:
>
>> Alright,
>>
>> I've compiled a working version of the mapscript_csharp assembly and
>> everything seems to be working fine.  I can load, enumerate the  layers,
>> and save a copy of the image to the file system.  However, I need  to 
>> add
>> a point to a dynamically created layer (all of this mind you in C#).
>> Here's what I've got:
>>
>>         mapObj m_obj = new mapObj(@"C:\base.map");
>>
>>         layerObj layer = new layerObj(m_obj);
>>         layer.name = "PointLayer";
>>         layer.type = MS_LAYER_TYPE.MS_LAYER_POINT;
>>         layer.setProjection("init=epsg:4326");
>>         layer.status = 1;
>>
>>         classObj c = new classObj(layer);
>>         c.label.type = MS_FONT_TYPE.MS_TRUETYPE;
>>         c.label.font = "arial";
>>         c.label.size = 7;
>>         c.label.color.setRGB(0, 0, 0);
>>         c.label.outlinecolor.setRGB(255, 255, 255);
>>
>>         styleObj style = new styleObj(c);
>>         style.symbolname = "circle";
>>         style.size = 14;
>>         style.color.setRGB(0, 255, 0);
>>         style.outlinecolor.setRGB(0, 0, 0);
>>
>>         Console.WriteLine ("# Map layers " + m_obj.numlayers + "; Map
>> name = " + m_obj.name);
>>         for (int i=0; i<m_obj.numlayers; i++)
>>         {
>>             Console.WriteLine("Layer [" + i + "] name: " +
>> m_obj.getLayer(i).name);
>>         }
>>
>>         imageObj i_obj = m_obj.draw();
>>
>>         pointObj p = new pointObj(-111.4752, 33.377321, 0.0, 0.0);
>>
>>         lineObj l = new lineObj();
>>         l.add(p);
>>
>>         shapeObj s = new shapeObj(0);
>>         s.add(l);
>>         s.text = "TEXT";
>>
>>         layer.addFeature(s);
>>
>>         p.draw(m_obj, layer, i_obj, 0, "TEXT");
>
>
> Ian,
>
> The last two lines here are redundant. There are 3 different ways to  
> render a point.
>
> 1) pointObj#draw
> 2) shapeObj#draw
> 3) layer#addFeature and then layer#draw
>
> You're doing a little bit of each. I recommend that you go with #1  
> and delete the lines in between the creation of the new point, and  
> p.draw().
>
>>
>>         s.Dispose();
>>         l.Dispose();
>>         p.Dispose();
>>
>>         Console.ReadLine();
>>
>> As I mentioned, the assembly is creating the appropriate file, and
>> everything seems to be working - with the exception of creating a  point
>> symbol on the new layer.  No exceptions are thrown so I must be  missing
>> something crucial.  If anyone can provide some hints, I'd be grateful!
>>
>
> How do you know that points are not drawn? Are you saving the  
> imageObj? I can't tell from the code.
>
> ---
> Sean Gillies
> sgillies at frii dot com
> http://zcologia.com/news
>

-- 
Ian Erickson
AnalyGIS, LLC
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http:// www.analygis.com

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