problem with class_expression

[Tomasz Wlaz?owski]

Hello!

I am pretty new mapserver user and  I don’t know any body from this
mailing list.
I hope that some will help me.
I have problem with class expression.
Till now I know how to choose one attribute from attribute table and
"highlight" it:
I use following syntax :

<input type="hidden" name="layer" value="Qroads">
<input type="hidden" name="map_Qroads_class_expression value = "[street]">
 <SELECT value="1" NAME="map_Qroads_class_expression"
style="font-size:12;color:blue;" onchange="javascript:Doit();">
<OPTION   value="none"> select street </OPTION>
<OPTION   value="none">---------------- </OPTION>
<OPTION   value="abc">street_A</OPTION>
<OPTION   value="cde">street_B</OPTION>
<OPTION   value="efg">street_C</OPTION>

... and in my map file I have defined layer:

LAYER
    NAME Qroads
    DATA qroads
    STATUS OFF
    TYPE LINE
LABELITEM "STREET"
CLASSITEM "STREET"
   CLASS
         EXPRESSION ([STREET])
         SYMBOL "triangle"
         SIZE 8
         COLOR 255 0 0
              LABEL
          COLOR 255 50 0
           TYPE BITMAP
          FONT arial-bold
          SIZE GIANT
            ANGLE AUTO
          ANTIALIAS TRUE
          POSITION UC
          PARTIALS FALSE
          MINDISTANCE 100
          BUFFER 4
               END
       END
END

I want to zoom to  the selected object from my 'select menu'.
Please, does anybody could help me?

Tomasz Wlazlowski
Insitute of Spatial Management and Housing



wlazlowski at igpik.waw.pl