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Stored procedures
FileToArray (Function)
In french: FichierVersTableau
Fills an array of classes or structures with the content of a HFSQL data file or query. The values of members of instances of structures or classes are filled with the values of items of records found in the data file or in the query.
Versions 18 and later
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Universal Windows 10 App This function is now available in Windows Store apps mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Remark: From version 19, HFSQL is the new name of HyperFileSQL.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Versions 23 and later
Java This function is now available for Java applications.
New in version 23
Java This function is now available for Java applications.
Java This function is now available for Java applications.
Example
// Declare a MyContacts class
MyContacts is Class
FamilyName is string
FirstName is string
EmailAddress is string
END
 
// Loading a data file's records Contacts.fic
// in an array of objects of MyContacts class
arrContact is array of MyContacts
 
HOuvre(Contacts)
FilesTable(tabContact, Contacts)
Syntax
FileToArray(<Array> [, <Data file> [, <Search key>]])
<Array>: Array of structures or objects
Name of one-dimensional array into which the elements found in the data file or in the query will be added. This array must be allocated in a structure or class type.
<Data file>: Character string (with or without quotes)
Name of the HFSQL data file or query used.
<Search key>: Character string (with or without quotes)
Versions 16 and later
Name of search item used. This parameter is used when a filter is defined by HFilter. This parameter corresponds to the optimal search key to use, returned by HFilter.
New in version 16
Name of search item used. This parameter is used when a filter is defined by HFilter. This parameter corresponds to the optimal search key to use, returned by HFilter.
Name of search item used. This parameter is used when a filter is defined by HFilter. This parameter corresponds to the optimal search key to use, returned by HFilter.
Remarks
  • The array is entirely cleared by FileToArray.
  • The automatic arrays are automatically resized according to the requirements.
  • The file browse is performed by respecting the current filter on the data file.
  • The position and the values of the current record are not modified by FileToArray.
  • For each record found in the data file or in the query:
    • for each member of structure or class with the same name, or same "mapping" attribute, as a file item, the item value is copied into the member value.
    • if a structure or class member has no item with the same name in the data file, its value is not modified.
    • if an item of data file has no member with the same name in the class, no copy of value will be performed.
  • Caution: FileToArray is a locking function for all the threads.
Component : wd250vm.dll
Minimum version required
  • Version 15
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Comments
LIMITATION: Missing auto assignment on subclass members
This function works great but is missing one neat feature, the assignment towards members of subclasses (Typically useful when implementing a Model-View-Controller architecture).

Here's a simplified example:
1) Classes used
Class CustomerClass
CustomerID is int
Name is string
CityID is int
City is a CityClass
END

Class CityClass
CityID is int
CityName is string
PostalCode is string
CountryID is int
Country is CountryClass
END

Class CountryClass
CountryID is int
CountryISOCode is string
CountryName is string
END

2) Query used to assign to class members
Assume we have a query that joins customers with the city table and the country table resulting in a data source with the format:
CustomerID | Name | CityID | CityName | PostalCode | CountryID | CountryISOCode | CountryName

3) Array used
MyArray is array of 0 CustomerClass

4) Now we assign this query result to the array of CustomerClass objects using the FichierVersTableau(MyArray, MyQuery) function. This would unfortunately only assign the members at the level of the Customer Class instance and not the members of the subclass City instance and the subsubclass Country instance limitating this feature in real life OO scenario's.
PeHoBe
18 Aug. 2010