c#-mapscript, zooming problem on Landsat-Layer

[Tamas Szekeres]

Christian,

>
> Know it works, the Problem realy was the metadataObj of the Layer. After a short time the Object was destroyed...the number of metadata in the Object were OK but the programm were not able to find some specific metadata information, so I get that error message.
>
> I solved the problem by declaring the metadata-Object as a class-Member. So now it works, but what could be the reason for that problem?
>

Yeah.  After looking into the code i see that setting the metadata of
the layer is unsafe and to be avoided. I have posted a bug for it:

http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1803

Instead of creating a metadata object from scratch you should get the
reference of the HashTableObj of the layer by reading
layerObj.metadata a set the items as you have done before.

>
> Another problem I've got is on closing the application. Not every but often I get the following error:
> System.AccessViolationException was unhandled
>   Message="Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
>   Source="mapscript_csharp"
>   StackTrace:
>        at mapscriptPINVOKE.delete_mapObj(HandleRef jarg1)
>        at mapObj.Dispose()
>        at mapObj.Finalize()
>
>

You should use the latest CVS version because you are using the
layerObj(mapObj) costructor. For more details see:

http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1743

Best Regards,

Tamas