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  • Binding between a control and a WLanguage variable or between a control and an item of a data file
  • Binding to an item: types of bindings
  • Miscellaneous
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Stored procedures
Automatically updates the values of the controls in a window or page with:
  • the values of the bound items in the current record (loaded in memory) of the data file described in the data model editor. This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
  • the values of the associated WLanguage variables. This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
PHP Only the binding to the items of a data file is supported. The binding to WLanguage variables is not supported in this version.
Remarks:
  • <Window/Page>.FromFile performs no read operation on the data file. The value of the record loaded in memory is used to initialize the controls. Therefore, a record must be loaded in memory beforehand (<Source>.Read, <Source>.ReadSeek, <Source>.ReadFirst, etc.).
  • This function is global to the window. If it is called in an internal window, the parent window and the other internal windows will benefit from it. The mechanism is identical for the pages.
  • In WEBDEV, you also have the ability to use <Page>.FromFile.
Remark: From version 19, HFSQL is the new name of HyperFileSQL.
Example
HReadSeekFirst(Customer, Name, "PAUL")
IF HFound() = True THEN
WIN_Customer.FromFile(Customer)
END
// Read the record and transfer the items to the controls
HReadFirst(Customer, Name)
WIN_Customer.FromFile(Customer)
Syntax
<Window/Page>.FromFile([<Source>])
<Window/Page>: Name of window or page
Name of the window or page containing the controls to initialize.
If this parameter is not specified or is an empty string (""), the window of the current code is used.
<Source>: Optional character string (with quotes)
Name of the source the controls to be updated are bound to. This source can be:
  • The name of a data file: only controls that have a binding to this data file are taken into account.
  • The name of a WLanguage variable: only controls that have a binding to this WLanguage variable are taken into account.
    Remarks:
    • If the name of the variable is enclosed in quotes, the control will be bound to the specified variable.
    • If the name of the variable is not enclosed in quotes, the control will be bound to the content of the variable (e.g., a variable containing the name of another variable).
If this name is not specified, all the window or page controls that are bound to a data file described in the data model editor or with a WLanguage variable will be taken into account.
Remarks

Binding between a control and a WLanguage variable or between a control and an item of a data file

The binding between a control and a WLanguage variable or between a control and an item of a data file can be determined:
  • In the editor, in the control description window ("Binding" tab).
  • In the code, with the DataBinding property.

Binding to an item: types of bindings

There are two types of bindings between a control and an item
  • direct binding: In this case, <Window/Page>.FromFile transfers the value of the items of the record loaded in memory to the bound control, without reading any values.
  • binding by reading the records in the bound data file.

Miscellaneous

  • Auto-filled Combo Box control bound to an HFSQL data file: <Window/Page>.FromFile must not be in the window "Global Declarations" event. The function must be in the "Initializing" event of the window.
  • Space characters in HFSQL items are kept.
  • <Window/Page>.FromFile updates the Image controls bound to image memo items.
  • <Window/Page>.FromFile manages the NULL value. If the content of the item corresponds to NULL, an empty string will be displayed in the associated edit control. To modify this display mode, use ControlError.
  • <Window/Page>.FromFile is not available on views. The values of the items must be assigned to each control
Component: wd260obj.dll
Minimum version required
  • Version 24
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