I have the code given below for reading and displaying all the drives on a computer.However,it does not read the NTFS mounted volume..I need the program just to read the mounted drive,
Module Module1
Sub Main()
For Each drive As String In System.Environment.GetLogicalDrives()
[Code].....
I'm trying to make a small app that reads MFT from a NTFS drive and lists deleted files and their names. The code is not ordered since its not finished yet. I made it basing on information a read at ntfs.com and some other examples found on the net. But the problem itself is the following. I have hard disk with to NTFS partitions, the main one having 250 GB and the second one having 1,5 GB. If I execute my code on the smaller drive, (using D as parameter for readfile api), I get the list of all deleted files exactly (I checked it with a recovery file app).
The problem is when I execute it on the other drive (C where Windows is installed, 7 if it matters), the problem is that I cant find any deleted file!!. The code gets all the files from MFT and then saves in a string variable only the deleted ones, I found that after deleting one file, it also disappears from the MFT (at least using my code). So, there may be some other way in which NTFS marks deleted files? As you see in my code, I iterate through the MFT entries and, from those that start with FILE, I take bytes 22 and 23 (0 base) and evaluate, if its value is 0 then its deleted, otherwise, it isn't (its a file or directory I think).
Public Structure SECURITY_ATTRIBUTES
Dim nLength As Integer
Dim lpSecurityDescriptor As Integer
Dim bInheritHandle As Boolean
End Structure
[Code] .....
I am trying to find some VB code examples on how to read the MFT/FAT Tables from NTFS and FAT32 drives. I am trying to scan the drive and to detect all deleted files and unallocated clusters on a particular drive.
View 4 RepliesThe drive is connected via USB and the problem I'm having is that, periodically, while my code is executing, the usb drive seems to disconnect and reconnect. (Nothing to do with the program, but the drive itself).I want to find a way to prevent these temporary drive reconnects from interrupting my code. IE, i want to insure that whatever read or write that is requested is actually executed even in the case of a temporary drive interruption.
View 1 RepliesI want to get mounted and unmounted drives using vb.net. Using getlogicaldrives methods we can get mounted drive. but i want to get unmounted drives also.
View 1 RepliesI need to Poll remote machines and list the drives they have mapped along with the path(UNC) of that mapping.So far I got some code that will allow me to Poll my machine not the remote one and instead of giving me the UNC it gave me the share name which code work but is not Ideal.
-----------------code----------------------------
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button3.Click
Dim allDrives() As DriveInfo = DriveInfo.GetDrives()
[code]....
I'm working on an app that should be able to read files from an External Hard Drive or even an iPhone or iPod. I'm a beginner so it would be great to keep it simple :) I suppose I should use the SerialPort class? But I'm not sure and I couldn't make it work.
View 7 RepliesI already have a code for detecting a removable device. However, I would like to enable my program to detect that USB drive and read and print the text in that specific text file on my webpage. I also have a program code for reading and printing a text file from a USB but that program needs the drive letter to be specified. My problem is, how would I program if the drive letter is unspecified?
Here is my code by the way,
Code:
<%@ Import NameSpace="System.IO" %>
<%For Each d As System.IO.DriveInfo In My.Computer.FileSystem.Drives
If d.DriveType = DriveType.Removable Then
Dim test As String = File.ReadAllText(& ":\sample.txt")
Response.Write(test)
End If
Next
%>
How to let the string test get the data so that I could put it on my page. I'm currently using that File.ReadAllText method.
My Dad made an application which had a feature that i want, basically his programme reads the users hard drive serial number and then multiplies it by say 12 and then divides it by 7 for example. This number is then shown as a 'Authorisation Code' which the user has to email to him and then his breaks it back down to the original hard drive serial number which he sends back which is the application serial number to activate it. I want to know how to read the actual hard drive serial number or a number that every computer has so i can do the same but i have searched everywhere and cannot find any examples for VB 2008 apart from one which didn't work
View 8 Repliesthis project im working on is giving me a headache. am trying to write a program to recognie both ntfs and ext3 fileformats and enable the copying of files between them. ive done the ntfs bit and my problem is how do i implement the ext3 file system reader and writer using visual basic.net.any references would be really useful.
View 1 RepliesAssessing NTFS user folder permissions
View 4 RepliesI have a piece of code to debug. Because of unknown bugs it creates a dummy filename. I want to track all the pieces of code who fires that creates the dummy filename, so I can change the dummy file creation to a thrown exception. Since I the dummy filename is stored on a string, I plan to modify that string to contain an invalid NTFS filename, maybe containing invalid chars. Is there a reason to prefer some invalid chars over others? There are some predefined invalid NTFS filename destined to this purpose? (I may think of AUX , COM1 , LPT1 or PRN , but those names run the risk of start sending data to a port instead of throwing an exception).
View 1 RepliesI need to build an app that can create a network share and give it full read/write permissions to everyone.
I have this code to create/delete network shares: [Code] But it only changes the NTFS permissions, not the share permissions. I'm running Windows 7 RC (64-bit) using Visual Basic 2008 Express. Does anyone have any ideas on how to change the share permissions, not ntfs?
Basically, we have an application which batch creates a large amount of files (pairs of PNG plus ASCII). The file count can exceed the one million.The first time the application ran the results were quite disappointing. The files get stored in folder structures of maximum 2000 files per folder. The tree depth gets only to two levels (root + packs folders). So the results would be stored in folders like "pack1","pack2"..."packn" each containing no more than 2000 files (1000 pairs in essence).
So getting back to the results, what happened was that although the application reported over 1.4 million files written, the results were that files were missing from the filesystem and others were corrupt (PNG cant be read and ASCII were blank filled with spaces).The speed that the files were written was not anything great (about 7 files per sec) and the total size ranged from 160K to 1.5M (rarely). The PNG images are 2000x2000 in size although I doubt it has anything to do with my problem.
Everything is done in pure .NET (image and ascii generation).The OS that has been tried was Win 2000 Advanced Server, Win 2003 Server plus XP Pro. The hardware ranged from Dual Core Workstation to high spec servers. The irony is that on the XP system the number of corrupt files was quite low where on the other two all hell broke loose. There were event logs written stating Event ID 2021 on the Win 2000 system and Paging faults on XP, which lead me to the next approach.
We wrapped the code to do an Application.DoEvents every second and refresh various statistic UI components. We obviously added Stream.Flush().Plus we added code to check the files (re-read them) once they are written. Even added "WriteThrough" option to avoid the OS cache! The result was stuggering as no errors were report yet the NTFS table again got corrupted!Now we inserted Thread.Sleep(100) after writing and then reading to confirm the file. Obviously this is slowing down the process but hope to have more stable results.
Reading and article about Event ID 2021 we saw it was suggesting to modify registry values, but the IT dep did not wish to accept this as they believe it is an application error.In pseudo code, here is more or less what is done:
<try>
<Create Image in memory>
<Open stream to filesystem>
[code]....
I need to gain access to Windows NTFS unique FileID...via VB.NET 2003...I found Kernel APIs ZwQueryDirectoryFile... calls which can return this info.
View 3 RepliesI'm running the following WMI script to get the associations between drive letters and physical drives on the system, but for some reason it omits CDROMs/DVD-ROMs. Can someone tell me how to get those as well?
Code:
ComputerName = "."
Set wmiServices = GetObject _
("winmgmts:{impersonationLevel=Impersonate}!//" & ComputerName)
Set wmiDiskDrives = wmiServices.ExecQuery _
("SELECT DeviceID FROM Win32_DiskDrive")
[Code3]...
I have a program that allows the user to enter a drive letter into a text box. The program then takes the letter and find the physical drive number (i.e. deviceharddisk3..). It then stripes out everything and leaves me with the number 3.
In VB6 I used mDrive.bas from vbAccelerator.com and it worked perfectly. I have been all over the internet and back and cannot find a solution written in VB.NET.
I want to make a tool that will assign a USB pen drive a drive letter, I am using WMI to acknowledge the device being plugged in, I can pull the deviceID, name, etc now I just need to work out how to assign the device to a drive and I just cant figure it out
View 4 RepliesDoes anyone know if there is a way to determine if a drive is local or a network drive?
View 1 RepliesI am trying to get the physical drive (device) number from the drive letter. If the user inputs the drive letter C the program will find the associated physical device number. For example if I input C then the result needs to be \Device\HardDrive1\... Some call it NT Device Name; I think. I have the code for VB6 from vbAccelerator, which works perfectly, but it does not work in VB.NET. My question is there a simple way of pulling the drive info that contains the drive letter and the physical device number. I have searched the internet and found nothing for VB.NET. I would post code but I have nothing for .NET.
View 1 RepliesUSB flash drive or pen drive in vb.net...
View 14 RepliesI have a program I am converting from VB6 to VB.NET and I am stuck at the very last piece of code. I need to determine what physical device number is associated with the drive letter.
The program takes the drive letter from a text box and goes and finds the device number (i.e. deviceharddrive3...) and strips out everything leaving me with the devicer number; in this case the number 3. I have searched the internet to and fro and found nothing in VB.NET.
My program in VB6 uses a .bas module from vbaccelerator.com called mDrive.bas and works great. I can't figure out how to convert it over to VB.NET.
First off a short background of the project I am working on- I am developing a program that will be run off removable media (i.e. USB Flash drive). This will be a �virtual desktop� which you will be able to take with you and have the same �desktop� on any system. As we know drive letters can change with each host system the drive is plugged into, I need to be able to determine the path for the flash drive and access a specific folder ( i.e. My Documents)
I have an picture box(representing the icon) placed on my form (form1) and when I click the icon I want to be able to open and view the a specific folder from the portable drive. I need a click event that will determine a dynamic drive letter for a directory on the removable drive and then open that directory in an explorer window.
[Code]....
I am using the following code to get a list of the letters for each drive on my computer. I want to get the drive letter of CD Drive from this list. The code I am using to get list is as below:
[Code]...
Is it possible to check if a Logical device gathered through a WMI search request is a CD/DVD Drive? Right now, I can get the path of every Win32_LogicalDisk through WMI, but E: (for me) is my DVD drive and unless there is a disc, my program fails because it tries to count the number of folders/files on the disc.
Ultimately, I'd like to be able to tell if it is a CD/DVD drive then check to see if there is a disc there before I do anything else to it. Can it be done using WMI?
I have a function that copies files from a CD to my HDD:CopyFiles(CD_Drive, FullPath & "")
The problem is that the Drive letter "I:" is not consistent. Sometimes when I connect and disconnect external devices, the CD Drive letter changes and then my code doesn't work unless I open the project, change the letter "I" and recompile.What code can I use that will ALWAYS detect my CD Drive, regardless of the drive letter? (Like for instance, NERO will detect and burn CDs regardless of the drive letter)
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('4e1b98200b534bcfb11430c4ef5e5987')
I want my program to find the disk drive. I just do not know how to find it programmically? Can anyone help, please? This should be pretty easy, right?
View 12 Replieshow to open an .exe file from a that is in a certain file, what i am trying to do is create a program that will be portable-via jump drive or cd drive, the reason i feel stupid is that I did not realize that visual basic and vb.net are two different animals- I was trying to use app.path for days- then came across a post that set me straight that I can not use it.[code]
View 4 RepliesI have created a form that I would like to run from a jump drive, or cd drive, were the drive letter will never be the same-
Application.StartupPath is the answer I have come up with- Implementing it is difficult for me- all the examples I have seen retrieves the path and imports it to a textbox. What I got is a form will start a .exe of a portable program- ( that will be located on the jump drive, or cd)
I have created a form that will -when a button is pressed- execute an .exe to a program that will also be on the jump drive. how to do this from start to finish on how to run an .exe from a file that will not ever be located on the same drive-
I should add I'am using visual studios 2010, visual basic.net
What is wrong with this code...... it should remove all folders and files on the "J" drive i am using win7 and would like to just format the drive
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
My.Computer.FileSystem.DeleteDirectory("J:", FileIO.DeleteDirectoryOption.DeleteAllContents, FileIO.RecycleOption.DeletePermanently, FileIO.UICancelOption.DoNothing)
End Sub
End Class