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Tests whether a Field has a null-value. A field has a null-value after calling ClearFields or after explicitly assigning a null-value to a Field by either calling TVPEField.SetNull or TVPETemplate.SetFieldToNull.

property boolean TVPEField.IsNull

read; runtime only

Remarks:

In case of an error, an exception is thrown (for example out of memory).

 

The Template Object itself offers simple methods to access a Field's value directly, i.e. without retrieving a Field Object first. See GetFieldIsNull and SetFieldToNull.

 

See also:

"dycodoc Template Processing" in the Programmer's Manual