[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
Field class for 32-bit unsigned integer data.
Source position: db.pas line 682
type TLongWordField = class(TNumericField) |
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public |
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constructor Create(); override; |
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Create new instance of TLongWordField. |
function CheckRange(); |
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Checkif a value is in the allowed range. |
property Value: LongWord; [rw] |
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Value as longword. |
published |
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property MaxValue: LongWord; [rw] |
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Maximum field value. |
property MinValue: LongWord; [rw] |
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Minimum field value. |
end; |
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Field class for 32-bit unsigned integer data. |
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Base class for all numerical data field classes. |
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Provide access to the contents of a single field in a record. |
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TObject,IFPObserved |
TByteField is instantiated when a dataset must manage a field with 32-bit unsigned data: the data type ftLongword. It overrides some methods of TField to handle LongWord data, and sets some of the properties to values for LongWord data. It also introduces some methods and properties specific to integer data such as MinValue and MaxValue.
It should never be necessary to create an instance of TLongWordField manually, a field of this class will be instantiated automatically for each integer field when a dataset is opened.
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Minimum field value. |
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Maximum field value. |