Olga Vlasova

Author Homepage: http://www.volgadb.com/

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Author Products

Total 3 products

VolgaDB Controls v.3.10

DB-Aware Components > Visual > Packs

By Olga Vlasova.

Freeware + source 01 Jul 2006


This library contains TVolgaDBGrid, TVolgaDBEdit, TVolgaCalendar, TVolgaPeriod, TVolgaFindEdit, TVolgaMeter, TFRVGrid. It works with any TDataset descendants (not only VolgaDB Engine).
  • TVolgaDBGrid is an improved DBGrid and fully replaces it. Column button style of TVolgaDBGrid may be: cbsCombo (with PickValues), cbsLookup, cbsCalendar, cbsCheck, cbsEllipsis, cbsNone. Other features: can edit calculated fields, title cells as buttons, Enter as TAB, fixed cells, wrap text in cells...
  • TVolgaDBEdit replaces TDBEdit, TDBComboBox, TDBLookupCombo, TDBDateTimePicker in one component. TVolgaDBEdit may be DB-aware and non DB-aware. It has following dialog styles: vdsEdit, vdsCustomDlg, vdsCombo, vdsLookup, vdsCalendar, vdsCalculator, vdsTree. TVolgaDBEdit supports ENTER and Up/Down keys for navigating between several TVolgaDBEdit components and Space key to drop dropdown list and can filter dropdown list on key press.
  • TVolgaCalendar is component for date choice from calendar.
  • TVolgaPeriod is component to change the period (range) of date.
  • TVolgaFindEdit is component for incremental searching or filtering data in linked dataset.
  • TVolgaMeter is simple progress bar with text.
  • TFRVGrid is used for printing TVolgaDbGrid with FastReport.


  • Status: Fully functional
  • Source: Included
  • Size: 439kB

Platforms: CB4, CB5, CB6, D4, D5, D6, D7

VolgaDB Engine v.5.1

DB-Aware Components > Direct DB Access > Custom

By Olga Vlasova.

GPLS 20 Jun 2006


VolgaDB Engine is a single-user engine for working with flat files or client-server multi-user engine for working with MSSQL, MySQL, MS Access without using BDE. Component package consists of TVolgaTable, TVolgaQuery, TVolgaServQuery, TVolgaDatabase.

Main features:

  • all standard properties, methods, events of TDataSet, working with any visual DB-aware controls;
  • supporting most data types (including BLOB and autoinc fields), field descriptions, default values;
  • record range and filter, sort-on-the-fly;
  • cached updates, reverting records;
  • temporary in-memory tables, automatic backup;
  • cloning and batch move, restructuring tables in code;
  • password protection with ciphering;
  • saving external objects (pointers) for any record;
  • saving any arbitrary text within Volga table;
  • exporting data to text, DBF, XML, Excel files, importing from text;
  • loading and saving data from table to stream;
  • executing SQL-select queries for Volga tables on disk and already opened datasets in memory;
  • executing SQL queries for MS SQL, MySQL, MS Access databases;
  • edit, sort, range, master-detail, filter operations on query result as a table;
  • cached updates in queries which can be saved in one (original) table;
  • callback events to visualization loading/saving process;
  • properties ReadOnly for whole table and RecReadOnly for current record.


  • Status: Trial (work while IDE is running)
  • Source: Included
  • Size: 115kB

Platforms: CB4, CB5, CB6, D2006, D4, D5, D6, D7

VolgaDB Engine for Kylix v.5.1

Kylix > Database > Direct Access

By Olga Vlasova.

GPLS 21 Jun 2006


VolgaDB Engine is a small and fast single-user engine for working with flat files in own Volga format or client-server multi-user engine for working with MS SQL, MySQL, MS Access, dBASE databases without using BDE. Component package consists of TVolgaTable, TVolgaQuery, TVolgaServQuery, TVolgaDatabase and VolgaDB Desktop utility for managing Volga files. It works with any visible DB-aware controls.
  • All necessary code is included in your application without additional DLLs. Distribution of your applications will be very simple - only copy exe and data files into any folder and it works.
  • Files in Volga format usually have *.d extension, although it is not mandatory. No external index or memo files are used. Sorting records is performed on the fly in memory, memos and images are saved within the *.d file.
  • Cloned tables are used for avoiding duplicate file loading and to use one data source in different views: use different sort orders, ranges and filters at the same time. All changes in all cloned tables are placed into shared cursor and saved with one ApplyUpdates method.
  • VolgaDB Engine implements password protection and uses Sapphire algorithm for ciphering flat Volga files.
  • Sort-on-the-fly, cached updates, master-detail, exporting data to text, DBF, XML, Excel files and more...


  • Status: Fully functional
  • Source: Included
  • Size: 79kB

Platforms: KLX3

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