RAD Studio VCL Reference
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TField.IsNull Property
TField Class | TField Members | DB Namespace | Description | See Also
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Indicates whether the field has a value assigned to it.

Pascal
property IsNull: Boolean;
C++
__property Boolean IsNull;
Description

Inspect IsNull to ascertain whether the field contains a value. If IsNull is true, the field is blank. If IsNull is false, the field has a value. 

 

See Also
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