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  • Operating mode in Windows Vista (and later)
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Stored procedures
fLoadBuffer (Function)
In french: fChargeBuffer
Loads the content of an external file (text, image, ...) in a buffer variable.
Versions 18 and later
Stored procedures This function is now available in the code of stored procedures.
New in version 18
Stored procedures This function is now available in the code of stored procedures.
Stored procedures This function is now available in the code of stored procedures.
Versions 21 and later
WEBDEV - Server codePHP This function is now available for PHP sites.
New in version 21
WEBDEV - Server codePHP This function is now available for PHP sites.
WEBDEV - Server codePHP This function is now available for PHP sites.
Example
WEBDEV - Server codeAjax
MyBuffer is Buffer
MyBuffer = fLoadBuffer("c:\tmp\MyFile.raw")
WEBDEV - Server codeAjax
// Read the first 50 bytes of the file from the beginning
MyBuffer is Buffer
MyBuffer = fLoadBuffer("C:\Dir\Fic.test", 0, 50)
Syntax
<Result> = fLoadBuffer(<External file> [, <Position> [, <Size>]])
<Result>: Buffer
Content of text file.
<External file>: Character string (with quotes)
Name and full (or relative) path of external file (text, image, ...). A UNC path can be used. This file is not necessarily a file in TXT format: indeed, the binary zeros are allowed.
<Position>: Optional integer
Versions 18 and later
Position from which the text file must be loaded. This position is expressed in bytes (or in number of characters).
This parameters corresponds to 0 (beginning of file) by default.
New in version 18
Position from which the text file must be loaded. This position is expressed in bytes (or in number of characters).
This parameters corresponds to 0 (beginning of file) by default.
Position from which the text file must be loaded. This position is expressed in bytes (or in number of characters).
This parameters corresponds to 0 (beginning of file) by default.
<Size>: Optional integer
Versions 18 and later
Maximum size of the file to load. This size is expressed in bytes (or in number of characters).
By default, this size corresponds to the total size of the file.
New in version 18
Maximum size of the file to load. This size is expressed in bytes (or in number of characters).
By default, this size corresponds to the total size of the file.
Maximum size of the file to load. This size is expressed in bytes (or in number of characters).
By default, this size corresponds to the total size of the file.
Remarks
WEBDEV - Server code

Operating mode in Windows Vista (and later)

If this function does not operate properly in Windows Vista (and later), check whether the file or directory used is not in one of the system directories (Windows directory or "Program Files" directory).
Indeed, in Windows Vista (and later), with the UAC mechanism (User Account Control) enabled, you must have the administrator privileges to handle and/or modify the files or directories in the system directories (Windows directory or "Program Files" directory).
Programming tip: To handle and/or modify the files or directories without administrator privileges, you should:
  • avoid writing into the Windows directory or into the "Program Files" directory,
  • use the system directory corresponding to the application (returned by SysDir associated with the srCommonAppData constant).
Component : wd250std.dll
Minimum version required
  • Version 16
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Comments
Seleciona Imagem e Resize
PROCEDURE SelecionaImagem(Janela, ControleImagem,bResize is boolean)

bufImagebuffer is Buffer

sFile is string = fSelect("c:\", "Selecione uma Foto...", "Todos os arquivos (*.*)" + TAB + "*.*" + CR + "PNG" + TAB + "*.PNG" + CR + "JPEG" + TAB + "*.JPEG" + CR + "JPG" + TAB + "*.JPG", "*.*")

IF fFileExist(sFile) = True

bufImagebuffer = fLoadBuffer(sFile)

sControlTelaImg is string = Janela +"."+ ControleImagem //monta a string do indirection

{sControlTelaImg,indControl} = bufImagebuffer

IF bResize = True

dResize({sControlTelaImg,indControl},{sControlTelaImg,indControl}..Width,{sControlTelaImg,indControl}..Height,drHomotheticCentered)

END

ELSE

Info("Nenhum arquivo selecionado!")

END

RESULT bufImagebuffer
//CASE ERROR:
//
CASE EXCEPTION:
BOLLER
23 Mar. 2019
Como usar a procedure SelecionaImagem
IMG_LogoCompany = SelecionaImagem("WIN_GPU_02_Menu","IMG_LogoCompany",True)
BOLLER
23 Mar. 2019