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Is the field empty
Source position: db.pas line 431
public property TField.IsNull : Boolean |
IsNull is True if the field does not have a value. If the underlying data contained a value, or a value is written to it, IsNull will return False. After TDataset.Insert is called or Clear is called then IsNull will return True.
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Clear the field contents. |
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Insert a new record at the current position. |