PC SOFT

ONLINE HELP
FOR WINDEV, WEBDEV AND WINDEV MOBILE

Home | Sign in | English US
  • 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
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadApple WatchUniversal Windows 10 AppWindows Mobile
Others
Stored procedures
ScreenToSource (Function)
In French: EcranVersSource
ODBCNot available with this kind of connection
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).
PHP Only the link with the items of a data file is supported. The link with the WLanguage variables is not supported in this version.
Notes:
  • ScreenToSource cannot be used to write into the data file: Only the variables of the file items are assigned (which means the 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 the WINDEV applications in Linux.
New in version 16
WINDEVLinux This function is now available for the WINDEV applications in Linux.
WINDEVLinux This function is now available for the WINDEV applications in Linux.
Versions 18 and later
iPhone/iPad This function is now available for the iPhone/iPad applications.
New in version 18
iPhone/iPad This function is now available for the iPhone/iPad applications.
iPhone/iPad This function is now available for the iPhone/iPad applications.
Note: 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.
Android This function is now available for the Android applications.
Java This function is now available for the Java applications.
New in version 22
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Android This function is now available for the Android applications.
Java This function is now available for the Java applications.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Android This function is now available for the Android applications.
Java This function is now available for the Java applications.
Example
// Click the "Add" button
ScreenToSource()
HAdd(Customer)
IF HErrorDuplicates() = True THEN Error("This number already exists")
Syntax
ScreenToSource([<Window Name> [, <Source Name>]])
<Window Name>: Optional character string (with or without quotes)
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.
PHP If this parameter is specified, it must correspond to the name of the current page. Otherwise, an error occurs.
<Source Name>: 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.
    Notes:
    • 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.
  • ScreenToSource does not affect the items or the variables (databinding) for the image controls. Use HLinkMemo.
  • ScreenToSource does not operate with the views.
Components
WINDEVReports and Queries wd230obj.dll
WEBDEV - Server code wd230page.dll
Windows Mobile wp230obj.dll
Java wd230java.jar
Linux wd230obj.so
Android wd230android.jar
Minimum required version
  • Version 14
This page is also available for…
Comments
Click [Add] to post a comment