[mapserver-users] Re: Highlighting symbols dynamically on a point layer using C# mapscript

[sireesha]

Thank you Tamas for the reply.
I am not able to view the selected data with different symbol.

i created a new layer 

            layerObj layer = new layerObj(map); 
            layer.name = "test";
            layer.type = MS_LAYER_TYPE.MS_LAYER_POINT;
            layer.status = mapscript.MS_TRUE;
            classObj clsobj = new classObj(layer);
            styleObj styobj = new styleObj(clsobj);
            styobj.setSymbolByName(map, "circle");
            styobj.size = 20;
            styobj.color.setRGB(255, 50, 0);
            styobj.outlinecolor.setRGB(0, 0, 0);

Now to add the selected point data to the layer i wrote the code mentioned
below:But i am not able to view the points in different symbols.

 foreach (DataRow dr in dtVillages.Rows)
            {
                
string villCode = dr["VILLAGE_CODE"].ToString().Trim();
cmd.CommandText = "select x(the_geom),y(the_geom) from villages_fdhs WHERE
vlg_code ='" + villCode + "'";
                pointObj point = new pointObj(0, 0, 0, 0);
                double x_coor, y_coor;
                Npgsql.NpgsqlDataReader rdr = cmd.ExecuteReader();
                while (rdr.Read())
                {
                    x_coor =
Double.Parse(rdr.GetValue(0).ToString().Trim());
                    y_coor =
Double.Parse(rdr.GetValue(1).ToString().Trim());
                    point.setXY(x_coor, y_coor, 0);
                    image = map.draw();
                    layer = map.getLayerByName("test");
                    layer.status = mapscript.MS_ON;
                    point.draw(map, layer, img, 0, "abc");
                    map.draw();
                }
            }
Please help me where i am going wrong.



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