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ONLINE HELP
 WINDEV, WEBDEV AND WINDEV MOBILE
  • Generation wizard
  • Special case: Extraction from a database
  • Special case: ".WDD" file (analysis description)
WINDEV
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystUniversal Windows 10 App
Others
Stored procedures
Extracts a resource from the application into a physical device location.
Remarks:
  • Universal Windows 10 AppAndroidAndroid Widget iPhone/iPadIOS WidgetMac Catalyst The resource to extract must have been included in the generated application by the generation wizard (see Notes).
  • WindowsLinux In WINDEV applications or WEBDEV sites, the resource to extract must be:
    • in the "Other" category of the Project explorer pane,
    • in the main library of the application (WDL file).
  • AndroidAndroid Widget This function can be used in the Android simulator.
Caution: To prevent piracy, WINDEV, WEBDEV and WINDEV Mobile elements (reports, windows, etc.) cannot be extracted at runtime.
Example
Android
// Reads the content of readme.txt text file included in the application resources
IF fExtractResource("readme.txt", "/sdcard/extraction.txt") = True THEN
EDT_Text = fLoadText("/sdcard/extraction.txt") 
END
Android
// Used to precisely locate the HFSQL data on the Android Smartphone
sDataPath is string = SysRepDirStorageCard() + fSep() + "Customer tests"  + fSep()
IF NOT fDirectoryExist(sDataPath) THEN fMakeDir(sDataPath)
 
fExtractResource("Product.fic", sDataPath + "Product.fic")
fExtractResource("Product.ndx", sDataPath + "Product.ndx")
fExtractResource("Product.mmo", sDataPath + "Product.mmo")
 
IF NOT HChangeDir(Product, sDataPath) THEN
Error(HErrorInfo())
END
Android
// Extracts all the images in PNG format
fExtractResource("*.png", CompleteDir(SysDirStorageCard()) + "images")
Syntax
<Result> = fExtractResource(<Resource name> [, <Destination>])
<Result>: Boolean
  • True if the resource was extracted,
  • False otherwise. If an error occurs, the ErrorOccurred variable is set to True. To get more details on the error, use ErrorInfo.
<Resource name>: Character string
Name of resource to extract (file name with its extension).
AndroidAndroid Widget iPhone/iPadIOS WidgetMac Catalyst Wildcard characters (* and?) are allowed. This allows you to extract several resources in a single call. In this case, the <Destination> parameter must correspond to a directory (that exists or not).
WindowsLinux The resource to extract must be found in the main application library (WDL file). The library must have not been loaded by LoadWDL.
<Destination>: Optional character string
AndroidAndroid Widget Full or relative path of destination file. This path can be relative to the current directory (returned by fCurrentDir). This parameter is case-sensitive.
If the directory exists, the resource is directly extracted into this directory.
The directory is created if it does not exist.
If this parameter is not specified or if it corresponds to an empty string (""), the resource will be extracted into the current application directory in a file named like the resource.
The destination file will be overwritten if it already exists before the extraction.
Reminder: In Android, the file system is read-only on the device and on the emulator. An application can only write to its setup directory or one of its subdirectories, as well as to the external memory (SDCard).
iPhone/iPadIOS WidgetMac Catalyst Full path of destination file. This parameter is case-sensitive.
If the directory exists, the resource is directly extracted into this directory.
The directory is created if it does not exist.
If this parameter is not specified or if it corresponds to an empty string (""), the resource will be extracted into the "Documents" application directory in a file named like the resource.
The destination file will be overwritten if it already exists before the extraction.
WindowsLinux Full path of destination file.
If the directory exists, the resource is directly extracted into this directory.
The directory is created if it does not exist.
If this parameter is not specified or if it corresponds to an empty string (""), the resource will be extracted into the application data directory (returned by fDataDir) in a file named like the resource.
The destination file will be overwritten if it already exists before the extraction.
Remarks
Universal Windows 10 AppAndroidAndroid Widget iPhone/iPadIOS WidgetMac Catalyst

Generation wizard

The wizard for generating Android, Universal Windows 10 app or iPhone/iPad applications allows you to specify whether files and libraries must be included in the application.
In an Android application, you have the ability to include:
  • specific resources.
  • specific Java archives.
Then, these files can be:
  • used directly (files that will only be read, for example: sound files, image files, etc.).
  • extracted with fExtractResource (e.g., files that will be modified by the application)
If an image is included in the application, it can be directly assigned to a control by specifying its name. For example:
IMG_Image = image1
AndroidAndroid Widget iPhone/iPadIOS WidgetMac Catalyst You have the ability to list the files included in the application with fListResource.
For more details, see:
AndroidAndroid Widget

Special case: Extraction from a database

If the file to extract is an SQLite database, use fDataDir to extract it into the data directory of the application ("databases" directory).

Example:
fExtractResource(<Database vame>.db, CompleteDir(fDataDir()) + <Database name>.db)
To connect to this database, all you have to do is specify <Database name>.db as source for the SQLite connection. For more details, see Android application: Using a database.

Special case: ".WDD" file (analysis description)

An analysis description (".WDD" file) integrated to the library of an application cannot be extracted.
To extract a file from a library that cannot be extracted by fExtractResource, you can use an HFSQL data file integrated in the library.
Component: wd280vm.dll
See also
Minimum version required
  • Version 16
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