Re: [UMN_MAPSERVER-USERS] React on query error

[Stefan Schwarzer]

Hi, my application offers the possibility to preselect countries that should be displayed on the map. Thus, instead of having all countries, I get only these preselected ones mapped; the others are grayed out. But if a user now uses the query tool and clicks on one of those not-preselected countries, than an mapscript error occurs (naturally). Is there a way to react on such an error warning and continue at another point, so that this "problem" is just ignored and the application can continue to work? if (!$imgbox) $map -> queryByPoint($click_pt, MS_MULTIPLE, -1); // here is then the error

                else

$map -> queryByRect($click_rt); "Warning: [MapServer Error]: msQueryByPoint(): No matching record(s) found. in /www/ geodataportal/htdocs/mod_map/etc/php/query.php on line 42" Thanks for any help!

Stefan,

Being that is just a warning message you should be able to set a variable to the result of the queryByPoint and then test for MS_SUCCESS or MS_FAILURE and react accordingly.

Lowell

Thanks for that. I did it now the following way:

                //Query the Map at the point clicked
                if (!$imgbox)
                        @ $a = $map -> queryByPoint($click_pt, MS_MULTIPLE, -1);
                else
                        @ $a = $map -> queryByRect($click_rt);
                
                if ($a == MS_SUCCESS)
                {
                        xxxx
                }