[mapguide-users] How to insert null using MgFeatureService::UpdateFeatures

[christophe_geomap]

Hi all,
I want to insert or update a value with null using
MgFeatureService::UpdateFeatures but i don't know how !
I try to do this :

   MgPropertyCollection insertProperties = new MgPropertyCollection();
   MgInt32Property mgProp = new MgInt32Property(propertyName, 0);
   mgProp.SetNull(true);
   insertProperties.Add(mgProp);
...
  
   MgFeatureCommandCollection commands = new MgFeatureCommandCollection();
   commands.Add(new MgInsertFeatures(classDef.GetName(), insertProperties));
   MgPropertyCollection updatedProps = featureService.UpdateFeatures(resId,
commands, false);

but it doesn't work. If i don't add MgProperty with null value to the
MgPropertyCollection, it work, but i  don't have null in my field (older
value if update, default value if insert).

In mapguide src the function
MgServerFeatureUtil::MgPropertyToFdoDataValue(MgProperty* srcProp) don't
test if the MgProperty is null.

Can anybody help me? 

Christophe
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