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Stored procedures
HActivateAutoFilter (Function)
In french: HActiveFiltreAuto
Native Connectors (Native Accesses)Available only with this kind of connection
Enables an automatic filter on the linked data files when browsing an XML file. This filter can be disabled by HDeactivateAutoFilter.
Caution: This function is only available for the Native XML Connector.
Versions 17 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
New in version 17
iPhone/iPad This function is now available for iPhone/iPad applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
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.
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.
Remark: From version 19, HFSQL is the new name of HyperFileSQL.
Example
// Enable all the possible automatic filters on the CUSTOMER data file
HActivateAutoFilter(CUSTOMER, "*" )
// except between CUSTOMER and ORDER data files
HDeactivateAutoFilter(CUSTOMER, ORDER)
 
/////////////////////////////
 
// Browse orders
HReadFirst(ORDER, ORDERID)
WHILE NOT HOut()
// Browse order lines of current order
HReadFirst(ORDLINE, ORDERID)
WHILE NOT HOut()
HReadNext(ORDLINE, ORDERID)
END
// Next order
HReadNext(ORDER, ORDERID)
END
Syntax
<Result> = HActivateAutoFilter(<Browse data file> , <Data file to filter>)
<Result>: Boolean
  • True if the filter is enabled,
  • False if an error occurred (file or item not found).
<Browse data file>: Character string (with or without quotes)
Name of the data file used for the browse.
This parameter can correspond to "*". In this case, all the possible automatic filters will be enabled.
If <Browse data file> and <Data file to filter> correspond to "*", <Result> is set to True and no filter is enabled.
<Data file to filter>: Character string (with or without quotes)
Name of the data file to filter when positioned in the browse data file.
This parameter can correspond to "*". In this case, all the possible automatic filters will be enabled.
If <Browse data file> and <Data file to filter> correspond to "*", <Result> is set to True and no filter is enabled.
Remarks
Let's see a simple example:
HActivateAutoFilter(Parent, Child)

This code indicates that the records in the Child data file are browsed according to the current 'context' (node) of the Parent data file: all 'Child' of the current 'Parent' will be browsed.

HDeactivateAutoFilter(Parent, Child)

This code indicates that the previous filter is not enabled: The Child data file will be browsed independently of Parent. This means that all the records of Child will be browsed in the given child.
HActivateAutoFilter is used to enable/disable the hierarchical link between Parent and Child during browse operations.
Component : wd250hf.dll
Minimum version required
  • Version 9
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