- Binding between a control and a WLanguage variable or between a control and an item of a data file
- Updating the items: Special cases
In french: PageVersFichier
Not available with this kind of connection
- the value of the items in a data file with the value of the controls in the page. The basic of the data file fields linked to the Page fields are automatically assigned with the values of the corresponding fields.
- the value of the WLanguage variables with the value of the page controls. The WLanguage variables linked to the Page fields are automatically assigned with the values of the corresponding fields.
This operation is performed regardless of the state of the controls (grayed, inactive or invisible).
- 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, use the functions HAdd, HModify, HWrite, etc.
- Only the binding to the items of a data file is supported. Bindings to WLanguage variables are not supported in this version.
// Clic sur le bouton "Ajouter"
IF HErrorDuplicates() = True THEN Error("Ce numéro existe déjà")
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
Name of the source containing the data to update. This source can be:
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.
- 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.
- 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).
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)
- Programmatically, with the DataBinding property.
Updating the items: Special cases
- To automatically assign the NULL value to an item with PageToFile:
- Check "NULL supported" for the item in the data model editor.
- 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 the HLinkMemo function.
- PageToFile is not available on views.
- Binding with "Secure Password" items: The value of the "Password" item cannot be modified until the user changes the value in the control bound to the item.