Little Help - C#

[Sean Gillies]

Ian,

Down in the heart of the MapServer code, style.symbol is all that  
counts. The symbolname attribute is (only) for convenience. The  
closest thing we have in mapscript now is

     symbol_index = map.symbolset.index("some_name")
     style.symbol = symbol_index

cheers,
Sean

On Dec 15, 2005, at 9:03 AM, Ian Erickson wrote:

> 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
> Gold Canyon, AZ  85218
> http:// www.analygis.com
>
> tel: 480.677.6260
> mob: 480.221.7173
> fax: 480.677.6261
>
> See AnalyGIS at work:
> http://65.39.85.13/google/
> http://65.39.85.13/virtualearth/

---
Sean Gillies
sgillies at frii dot com
http://zcologia.com/news