Class tfieldfieldlink
Unit
Declaration
type tfieldfieldlink = class(tfieldlink, idbeditinfo)
Description
This item has no description. Showing description inherited from tfieldlink.
tfieldlink updates a field value (typically to initialize it on insert) in onupdatedata; ttimestampfieldlink is a descendant that sets a field to the current timestamp before post. See also tfieldfieldlink, to update a field from the value of a field in another dataset (e.g. to copy a master key into a new detail record), and tfieldparamlink (unit msesqldb), to feed a field value into a query parameter of another dataset — useful for a server-side lookup, or for master/detail filtering.
Hierarchy
- TObject
- tpersistent
- tcomponent
- tmsecomponent
- tfieldlink
- tfieldfieldlink
Overview
Methods
| Protected | procedure updatedata(const afield: tfield); override; |
| Protected | procedure defineproperties(filer: tfiler); override; |
| Public | constructor create(aowner: tcomponent); override; |
| Public | destructor destroy; override; |
| Public | function sourcefield: tfield; |
Properties
| Published | property fieldname: string read getfieldname
write setfieldname; |
| Published | property datasource: tdatasource read getdatasource write setdatasource; |
Description
Methods
| Protected | procedure updatedata(const afield: tfield); override; |
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| Protected | procedure defineproperties(filer: tfiler); override; |
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| Public | constructor create(aowner: tcomponent); override; |
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| Public | destructor destroy; override; |
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| Public | function sourcefield: tfield; |
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Properties
| Published | property fieldname: string read getfieldname
write setfieldname; |
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| Published | property datasource: tdatasource read getdatasource write setdatasource; |
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