Data.DB.TParam
Delphi
TParam = class(TCollectionItem)
C++
class PASCALIMPLEMENTATION TParam : public System::Classes::TCollectionItem
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| class | public | Data.DB.pas Data.DB.hpp |
Data.DB | Data.DB |
Description
TParam represents a field parameter for a query or stored procedure.
Use the properties of a TParam to set the value of a parameter that represents the value of a field. Datasets that represent queries and stored procedures create TParam objects to represent the parameters of their query or stored procedures. Client datasets use TParam objects to pass parameter values to a source dataset.
Note: ADO-based datasets do not use TParam objects to represent parameter values. They use the TParameter class instead.
TParam shares many properties with TField, as both describe the value of a field in a dataset. However, a TField object has several properties to describe the field binding, and how the field is displayed, edited, or calculated that are not needed in a TParam object. Conversely, TParam includes properties that indicate how the field value is passed as a parameter.
See Also