TField TDataSet (, , TField - ).
Fields TDataSet . Fields TField, . .
TField , . , , , AsString, AsBoolean, AsFloat, AsInteger. Text (c , ) FieldName ( ).
Fields Editor , . TDataSet, TTable TQuery, SQL-. Fields Editor Field . Fields Editor , TDataSet, TField, , .
Fields Editor :
- TTable TQuery .
- DatabaseName TTable TQuery.
- TableName TTable SQL TQuery.
- TDataSet , .
- Fields ditor. , TTable.
- Add Fields.
Add Fields (. 1.)
.1.
- , , OK.
. 2. ,
- , New Field ( OnCalcFields TTable, ).
- , Delete.
, Fields Editor , , - h- .
|
|
drag-and-drop Fields Editor , , ( - DBEdit, , , , , DBImage, Clipboard ). TDBNavigator ( TTable TQuery, ) TDataSource, , .
. 3. Fields Editor
Fields Editor , . TField. 1 :
1. TField
TStringField | 8192 . |
TAutoIncField | -2,147,483,648 2,147,483,647. . TIntegerField. |
TIntegerField | -2,147,483,648 2,147,483,647. |
TSmallIntField | -32768 32767. |
TWordField | 0 65535. |
TFloatField | 1.2x10e-324 1.7x10e308 15-16 . |
TCurrencyField | 1.2x10e-324 1.7x10e308 15-16 . |
TBooleanField | true false. |
TDateTimeField | . |
TDateField | . |
TTimeField | . |
TBlobField | . |
TBytesField | . |
TVarBytesField | 65535 , . |
TMemoField | . |
TGraphicField | , , . |