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QueryFileSystem Method
See Also  Example
Leadtools.Twain Namespace > TwainSession Class : QueryFileSystem Method




fileSystem
TwainFileSystem contains file system information
message
Determines the Twain file system message.
Query Twain file system.

Syntax

Visual Basic (Declaration) 
Public Sub QueryFileSystem( _
   ByVal fileSystem As TwainFileSystem, _
   ByVal message As TwainFileSystemMessage _
)
Visual Basic (Usage)Copy Code
Dim instance As TwainSession
Dim fileSystem As TwainFileSystem
Dim message As TwainFileSystemMessage
 
instance.QueryFileSystem(fileSystem, message)
C# 
public void QueryFileSystem( 
   TwainFileSystem fileSystem,
   TwainFileSystemMessage message
)
Managed Extensions for C++ 
public: void QueryFileSystem( 
   TwainFileSystem* fileSystem,
   TwainFileSystemMessage message
)
C++/CLI 
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

Example

Visual BasicCopy Code
Public Sub QueryFileSystemExample(ByVal parent As IWin32Window)
   Dim session As TwainSession = New TwainSession()
   Dim fileSystem As TwainFileSystem = New TwainFileSystem()
   Dim msg As String

   Try
      session.Startup(parent, "LEAD Technologies, Inc.", "LEAD Twain .NET", "Version 14", "LEADTools Twain test sample", TwainStartupFlags.None)
      session.QueryFileSystem(fileSystem, TwainFileSystemMessage.AutomaticCaptureDirectory)

      ' I changed the following line from "fileSystem.FileType" to "fileSystem.FileFormat"
      msg = String.Format("Input Name = {0}" & Constants.vbLf & "Output Name = {1}" & Constants.vbLf & "Recursive = {2}" & Constants.vbLf & "FileType = {3}" & Constants.vbLf & "FileSize = {4}" & Constants.vbLf & "CreateTimeDate = {5}" & Constants.vbLf & "ModifiedTimeDate = {6}" & Constants.vbLf & "FreeMediaSpace = {7}" & Constants.vbLf & "NewImageSize = {8}" & Constants.vbLf & "NumberOfFiles = {9}" & Constants.vbLf & "NumberOfAudioSnippets = {10}" & Constants.vbLf & "DeviceGroupMask = {11}" & Constants.vbLf, fileSystem.InputName, fileSystem.OutputName, fileSystem.Recursive, fileSystem.FileFormat, fileSystem.FileSize, fileSystem.CreateTimeDate, fileSystem.ModifiedTimeDate, fileSystem.FreeSpace, fileSystem.NewImageSize, fileSystem.NumberOfFiles, fileSystem.NumberOfAudioSnippets, fileSystem.DeviceGroupMask)

      MessageBox.Show(msg)
   Catch ex As Exception
      MessageBox.Show(ex.Message)
   Finally
      session.Shutdown()
   End Try
End Sub
C#Copy Code
public void QueryFileSystemExample(IWin32Window parent) 
{ 
   TwainSession session = new TwainSession(); 
   TwainFileSystem fileSystem = new TwainFileSystem(); 
   string msg; 
 
   try 
   { 
      session.Startup(parent, "LEAD Technologies, Inc.", "LEAD Twain .NET", "Version 14", "LEADTools Twain test sample", 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(); 
   } 
}

Remarks

This method will query Twain file system for digital cameras. And update the Twain file system upon the passed message to fileSystemMsg parameters.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also