[gdal-dev] Update existing shape file

[Mateusz Loskot]

wow wrote:
> Hi,
>   I wanna set new field value to an existing shape file which has been
> opened with update access, but it doesn't work, my code like this:
>  
>   OGRFeature* pFeature = pLayer->GetFeature(2); 
>   int nIdx = pFeature->GetFieldIndex("Name");
>  pFeature->UnsetField(nIdx);
>  pFeature->SetField( "Name", "hanJ reiver" );
>  
>   Anyone give me some advices?

You need to call OGRLayer::SyncToDisk method

http://www.gdal.org/ogr/classOGRLayer.html#ebb07284c734e485d8611b7c8599254f

to get data update flushed to file on disk.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org