# OSGeo::FDO::Filter::NullCondition Class Reference
[OSGeo::FDO::Filter]

Inheritance diagram for OSGeo::FDO::Filter::NullCondition:

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List of all members.

## Detailed Description

The NullCondition class derives from SearchCondition and can be used to test if the value of a specified data property is null.

()

## Public Member Functions
__property OSGeo::FDO::Expression::Identifier * | get_PropertyName ()
| Gets the name of the data property.
| NullCondition (System::IntPtr unmanaged, System::Boolean autoDelete)
| Constructs a NullCondition object based on an unmanaged instance of the object.
| NullCondition (OSGeo::FDO::Expression::Identifier *propertyName)
| Constructs an instance of an NullCondition using the specified arguments.
| NullCondition (System::String *propertyName)
| Constructs an instance of an NullCondition using the specified arguments.
| NullCondition ()
| Constructs a default instance of an NullCondition.
System::Void | Process (OSGeo::FDO::Filter::IFilterProcessor *processor)
| Overrides Filter.Process to pass NullCondition to the appropriate filter processor operation.
__property System::Void | set_PropertyName (OSGeo::FDO::Expression::Identifier *value)
| Sets the name of the data property.