[gdal-dev] Checking for a NULL value in a field using OGR

[Tamas Szekeres]

You could probably use OGRFeature::IsFieldSet but I doubt if it is
properly handled by the driver for the numeric fields.

Best regards,

Tamas


2008/6/12 Xavi Almolda <xavi.almolda+OGR at gmail.com>:
> Hello,
>
> I am using OGR to read information from ESRI Shapefile files. I have a
> problem with empty or null fields. I need to know when a value for a field
> has not been set. Something like an isNull() or isSet() function.
> For example, if I read a value as integer from a field that is empty, the
> value returned is a 0. The same value is returned if the field has a value
> of 0.
>
> Is there any way to check for these empty or not set field values using OGR
> ?
>
> Thank you,
>
> Xavi
>
>
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