PageToFile (Function)

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Binding between a control and a WLanguage variable or between a control and an item of a data file
Updating the items: Special cases

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See also

PageToFile (Function)

In french: PageVersFichier

Not available with this kind of connection

Automatically updates:

the value of the items in a data file with the value of the controls in the page. The data file items bound to the page controls are automatically updated with the values of these controls (even if they are grayed, inactive or invisible).
the value of the WLanguage variables with the value of the page controls. The WLanguage variables bound to the page controls are automatically updated with the values of these controls (even if they are grayed, inactive or invisible).

Only the binding to the items of a data file is supported. Bindings to WLanguage variables are not supported in this version.

Remark: PageToFile cannot be used to write to the data file: the variables of the data file items can only be updated (i.e variables of the record loaded in memory). To modify the records, you must use HAdd, HModify, HWrite, etc.

Remark: From version 19, HFSQL is the new name of HyperFileSQL.

Example

// Click the "Add" button
PageToFile()
HAdd("Customer")
IF HErrorDuplicates() = True THEN Error("This number already exists")

Syntax

PageToFile([<Page> [, <Source>]])

<Page>: Page name

Name of the page that contains the controls.
If this parameter is not specified or is an empty string (""), the page of the current code is used.
If this parameter is specified, it must correspond to the name of the current page. Otherwise, an error occurs.

<Source>: Optional character string (with or without quotes)

Name of the source containing the data to update. This source can be:
The name of a data file: only the controls bound to the items of the data file are taken into account.
The name of a WLanguage variable: only the controls bound to the 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 variable data (e.g., a variable containing the name of another variable).
If this name is not specified, all the page controls bound to an item of a data file described in the data model editor or to 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.

Updating the items: Special cases

To automatically assign the NULL value to an item with PageToFile:
1. Check "NULL supported" for the item in the data model editor.
2. Select the "NULL if empty" option in the Edit control bound to the item.
The items of the data file that are not bound to a control are not updated by PageToFile.
If multiple controls in the page are bound to the same data file item, PageToFile may not update the bound item properly. It is not recommended to bind multiple page controls to the same item.
PageToFile does not update the items with the values from Image controls. Use HLinkMemo.
PageToFile is not available on views.

Component: wd260page.dll