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  • Link between a control and a WLanguage variable or between a control and an item of a data file
  • Updating the items: Special cases
WINDEV
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WEBDEV
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WINDEV Mobile
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Others
Stored procedures
Automatically initializes:
  • the memory value of the items of a data file with the value of the controls found in the window or in the page. The items of the base data file linked to the window controls or to the page controls are automatically assigned with the values of the corresponding controls (even if these controls are grayed, inactive or invisible).
  • the value of the WLanguage variables with the value of the controls found in the window or in the page. The WLanguage variables linked to the window controls or to the page controls are automatically assigned with the values of the corresponding controls (event if these controls are grayed, inactive or invisible).
Remarks:
  • ScreenToSource cannot be used to write into the data file: only variables of the data file items are assigned (i.e variables of the record loaded in memory). To modify the records, you must use HAdd, HModify, HWrite, ...
  • In WEBDEV, you also have the ability to use PageToSource.
Versions 16 and later
WINDEVLinux This function is now available for WINDEV applications in Linux.
New in version 16
WINDEVLinux This function is now available for WINDEV applications in Linux.
WINDEVLinux This function is now available for WINDEV applications in Linux.
Remark: From version 19, HFSQL is the new name of HyperFileSQL.
Versions 22 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Java This function is now available for Java applications.
New in version 22
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Java This function is now available for Java applications.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Java This function is now available for Java applications.
Example
// Click the "Add" button
ScreenToSource()
HAdd(Customer)
IF HErrorDuplicates() = True THEN Error("This number already exists")
Syntax
ScreenToSource([<Window/Page> [, <Source>]])
<Window/Page>: Name of window or page
Name of the window or page where the controls are found.
If this parameter is not specified or if it corresponds to an empty string (""), the window or the page to which the current code belongs will be used.
Java If this parameter is specified, it must correspond to the name of the current window. 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 that have a link with this data file are taken into account.
  • The name of a WLanguage variable: only the controls that have a link with this WLanguage variable are taken into account.
    Remarks:
    • If the name of the variable is enclosed in quotes, the link will be performed with the specified variable.
    • If the name of the variable is not enclosed in quotes, the link will be performed with the content of the variable (variable containing the name of another variable for example).
If this name is not specified, all the window/page controls that have a link with a data file described in the data model editor or with a WLanguage variable will be taken into account.
Remarks

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

The link between a control and a WLanguage variable or between a control and an item of a data file can be known:
  • In the editor, in the description window of the control ("Link" tab).
  • By programming, with ..Filelink.

Updating the items: Special cases

  • To automatically assign the NULL value to an item with ScreenToSource:
    1. Check "NULL supported" for the item in the data model editor.
    2. Select the "NULL if empty" option in the edit control associated with the item.
  • The items of the data file that are not linked to a control are not updated by ScreenToSource.
  • If several window/page controls are linked to the same data file item, the linked item may not be updated properly by ScreenToSource. We do not advise you to link several controls of a window/page to the same item of a data file.
  • For Image controls, ScreenToSource does not assign data to items or variables (databinding). Use HLinkMemo.
  • ScreenToSource does not operate with the views.
Component : wd250obj.dll
Minimum version required
  • Version 14
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