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Versión: 2025
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Resultados 1-25 de 78 para data file
Creating an executable: Data file directory
Two types of directories can be configured when creating the executable...
Analysis: description data file structure
The analysis is used to define the structure of data files used by the project...
Manipular un control Línea de tiempo mediante programación
Un control Línea de tiempo se puede......
HReadLast (Function)
Sets the position on the last record of a data file according to a browse item.
HClose (Function)
Closes either a data file or all data files opened by the current user: all corresponding physical data files are closed for the current user.
HListFile (Function)
Returns the list of files:
  • analysis in progress.
  • of analyses in progress (case of projects with multiple analyses).
  • specific analysis recognized by the HFSQL engine.
  • available for connection via a Native Connector or an OLE DB driver.
  • for a group of files defined in the data model editor.
HPrevious (Function)
Sets the position on the previous record of the data file according to a browse item.
HEndNoModif (Function)
Unlocks a file that was locked by the same program with HNoModif.
Unalterable data files
This feature is used to signal that a data file cannot be modified after writing...
HDescribeItem (Function)
Describes a file item programmatically.
HUnlockRecNum (Function)
Unlocks a record locked by:
  • HLockRecNum,
  • a read function used with a locking parameter (HRead associated with the hLockWrite or hLockReadWrite constant for example).
HRead (Function)
Reads a record in a file according to a given record number.
HRecordToString (Función)
Convierte el contenido de la Record actual en cadena (en un archivo de datos, vista HFSQL, consulta, etc.).
HReadPrevious (Function)
Sets the position on the previous record of a file according to a browse item.
HDelete (Function)
Deletes a record from a data file (query or view).
HExportJSON (Function)
Exports the records found in a data file (HFSQL or OLE DB), view or query to a JSON file.
HListLink (Function)
Returns the list of data file bindings (Merise type) present:
  • in the current analysis,
  • Versiones 2024 y posteriores
    in ongoing analyses (case of projects with multiple analyses).
    New in SaaS
    in ongoing analyses (case of projects with multiple analyses).
    Novedad versión 2024
    in ongoing analyses (case of projects with multiple analyses).
    in ongoing analyses (case of projects with multiple analyses).
  • in a specific analysis.
HDescribeTrigger (Function)
Adds or modifies a trigger on an HFSQL data file.
HRestorePosition (Function)
Restores the previously saved context of a file (function HSavePosition): recording in progress, filter, playback pointers.
HFound (Function)
Checks whether the current record corresponds to the current filter or search.
HFirst (Function)
Sets the position on the first record of a data file according to the specified browse item.
HFilter (Function)
Defines and enables a filter on a data file, view or query.
fDataDir (Function)
Returns the full path of the directory of HFSQL data files specified by the user when installing the application.
HReadNext (Function)
Sets the position on the next data file record according to a browse item.
HExportXLS (Function)
Exports records from a data file (HFSQL or OLE DB), view or query to an Excel file (XLSX).
HDeleteView (Function)
Deletes a previously created view. This function uses the former view mechanism.
HReset (Function)
Initializes:
  • one or all variables of file items with their default values.
  • one or all items of a Record variable with their default values.
HWrite (Function)
Writes a record into a data file without updating the indexes corresponding to all keys used in the file.
HGetCurrentPosition (Function)
Returns the approximate position of current record in the data file.
HErrorLock (Function)
Used to check whether a lock error occurred.
HDeleteAll (Function)
Deletes all records from a data file, an HFSQL view or a query.
<Source>.DescribeTrigger (Function)
Adds or modifies a trigger on an HFSQL data file.
HSavePosition (Function)
Stores the current file context (current record, filter, pointers).
HDeactivateFilter (Function)
Temporarily disables the filter on a data file (view or query).
HOut (Function)
Used to find out whether the record on which you want to be positioned is located outside the data file, filter, view or query.
HListFullTextIndex (Function)
Returns the list of full-text indexes of a file (a query or a view) recognized by the HFSQL engine.
Managing connections
WINDEV, WEBDEV and WINDEV Mobile propose different methods for describing a connection...
HUnlockFile (Function)
Unlocks the records of a data file:
  • locked by HLockFile.
  • individually locked by a locking read function.
HOpen (Function)
Opens a data file.
NULL values in HFSQL
WINDEV, WEBDEV and WINDEV Mobile allow you to manage the NULL value in the items of the HFSQL data files and for all the other types of accesses (Native, OLE DB, ...
HListItem (Función)
Devuelve la lista de artículos:
  • encontrada en un fichero de datos ( una consulta o una vista) conocido por el motor HFSQL. Los archivos de datos definidos por las funciones HDeclare, HDeclareExternal y HDescribeFile se tienen en cuenta.
  • encontrado en una variable Record.
Desencadenantes de la aplicación
Un trigger es un procedimiento WLanguage llamado automáticamente por el motor HFSQL cada vez que se realiza una modificación (adición, eliminación, modificación, ...) en un registro de un archivo de datos.
HRetrieveRecord (Function)
Returns the content of the current record (in a file, a view or a query, ...).
HCreateView (Función)
Crea una vista HFSQL.
Esta función utiliza el anterior mecanismo de vistas.
Unicode management in HFSQL files
The analysis proposes two types of Unicode items...
HLast (Function)
Sets the position on the last record of a data file according to a browse item.
HDescribeFullTextIndex (Function)
Describes a full-text index of data file created programmatically.
HSetPosition (Function)
Sets the position on a record, based on the approximate position of one of its items.
HListKey (Function)
Returns the list of keys in a data file (query or view) recognized by the HFSQL engine.
HListStopWord (Function)
Returns the list of stop words used by a full-text index.
HNoModif (Function)
Forbids all the modifications on a data file (for all the programs, including the one that requested the no-modification policy).
HListREP (Function)
Returns the list of assignments for the data files handled by the current application, which means the list of physical files corresponding to the files described in the analysis.
HExportXML (Function)
Exports the records found in a data file (HFSQL or OLE DB), view or query to an XML file.
HExportCSV (Function)
Exports the records found in a data file (HFSQL or OLE DB), a view or a query to a CSV file.
HDescribeLink (Function)
Describes a link between two data files programmatically.
Errores en la gestión de archivos de datos
Cuando una función HFSQL falla (devuelve False, por ejemplo), se puede conocer mediante programación el número del error correspondiente con la función HError......
HCancelDeclaration (Función)
Permite: Borrar una declaración realizada de antemano por HDeclare, HDeclareExternal, HDescriveFile.. Después de esta operación, el archivo de datos motor HFSQL deja de reconocerlo.. Liberar los recursos de una consulta (después de la llamada a HExecuteQuery o HExecuteSQLQuery)....
SQLTransaction (Example)
Usage example of the SQLTransaction function
HDescribeItem (Example)
Usage example of the HDescribeItem function
Type (Example)
Usage example of the Type property
FileToArray( Función)
Llena una array de clases o estructuras con el contenido de un archivo de datos o consulta HFSQL.
Size (Example)
Usage example of the Size property
HCopyRecord (Example)
Usage example of the HCopyRecord function
HDeclareExternal (Example)
Usage example of the HDeclareExternal function
HLinkMemo (Example)
Usage example of the HLinkMemo function
Control Looper basado en un archivo de datos
Este tipo de control Looper utiliza los datos de un archivo de datos o consulta......
HIndex (Example)
Usage example of the HIndex function
HDescribeFullTextIndex (Example)
Usage example of the HDescribeFullTextIndex function
HViewToFile (Example)
Usage example of the HViewToFile function
fExtractPath( Función)
Devuelve los diferentes elementos de una ruta: disco, directorios, nombre y extensión del archivo.
BuildBrowsingTable (Example)
Usage example of the BuildBrowsingTable function
HCreation (Example)
Usage example of the HCreation function
HFileExist (Example)
Usage example of the HFileExist function
HState (Example)
Usage example of the HState function
HCancelDeclaration (Example)
Usage example of the HCancelDeclaration function
fDate (Example)
Usage example of the fDate function
Editor de código: Entrada predictiva
El siguiente mecanismo permite a los desarrolladores escribir código WLanguage más fácilmente en el editor de código ......
fDateTime (Example)
Usage example of the fDateTime function
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