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Boolean field class type
Source position: db.pas line 657
type TBooleanField = class(TField) |
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protected |
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function GetAsBoolean; override; |
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function GetAsString; override; |
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function GetAsVariant; override; |
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function GetAsInteger; override; |
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function GetDataSize; override; |
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function GetDefaultWidth; override; |
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procedure SetAsBoolean(); override; |
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procedure SetAsString(); override; |
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procedure SetAsInteger(); override; |
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procedure SetVarValue(); override; |
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public |
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constructor Create(); override; |
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Create a new instance of the TBooleanField class. |
property Value: Boolean; [rw] |
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Value of the field as a boolean value |
published |
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property DisplayValues: String; [rw] |
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Textual representation of the true and false values |
end; |
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Boolean field class type |
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Provide access to the contents of a single field in a record |
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TBooleanField is the field class used by TDataset whenever it needs to manage boolean data (TField.DataType equals ftBoolean). It overrides some properties and methods of TField to be able to work with boolean data.
It should never be necessary to create an instance of TBooleanField manually, a field of this class will be instantiated automatically for each boolean field when a dataset is opened.
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Base class for records-based data-access |
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Provide access to the contents of a single field in a record |
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