QueryFileSystem Method

Summary
Queries the TWAIN file system.
Syntax
C#
C++
public void QueryFileSystem( 
   TwainFileSystem fileSystem, 
   TwainFileSystemMessage message 
) 
vb[VB Syntax] 
Public Sub QueryFileSystem( _ 
   ByVal _fileSystem_ As TwainFileSystem, _ 
   ByVal _message_ As TwainFileSystemMessage _ 
) 
public: 
void QueryFileSystem(  
   TwainFileSystem^ fileSystem, 
   TwainFileSystemMessage message 
)  

Parameters

fileSystem
TwainFileSystem contains file system information

message
Determines the TWAIN file system message.

Return Value

A TwainFileSystem object that represents the specified TWAIN file system message

Remarks

This method will query the TWAIN file system for digital cameras, and update the TWAIN file system based on the message passed to the fileSystemMsg parameters.

Example
C#
using Leadtools; 
using Leadtools.Twain; 
 
 
public void QueryFileSystemExample(IntPtr parent) 
{ 
   TwainSession session = new TwainSession(); 
   TwainFileSystem fileSystem = new TwainFileSystem(); 
   string msg; 
 
   try 
   { 
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None); 
      session.QueryFileSystem(fileSystem, TwainFileSystemMessage.AutomaticCaptureDirectory); 
 
      msg = String.Format(@"Input Name = {0}\nOutput Name = {1}\nRecursive = {2}\nFileType = {3}\nFileSize = {4}\nCreateTimeDate = {5}\nModifiedTimeDate = {6}\nFreeMediaSpace = {7}\nNewImageSize = {8}\nNumberOfFiles 
            = {9}\nNumberOfAudioSnippets = {10}\nDeviceGroupMask = {11}\n", 
         fileSystem.InputName, 
         fileSystem.OutputName, 
         fileSystem.Recursive, 
         // I changed the following line from "fileSystem.FileType" to "fileSystem.FileFormat" 
         fileSystem.FileFormat, 
         fileSystem.FileSize, 
         fileSystem.CreateTimeDate, 
         fileSystem.ModifiedTimeDate, 
         fileSystem.FreeSpace, 
         fileSystem.NewImageSize, 
         fileSystem.NumberOfFiles, 
         fileSystem.NumberOfAudioSnippets, 
         fileSystem.DeviceGroupMask); 
 
      MessageBox.Show(msg); 
   } 
   catch (Exception ex) 
   { 
      MessageBox.Show(ex.Message); 
   } 
   finally 
   { 
      session.Shutdown(); 
   } 
} 
Requirements

Target Platforms

Help Version 22.0.2022.4.5
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Leadtools.Twain Assembly

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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.