Get Info Regarding Logical Drive?
Aug 9, 2010i'm trying to find a way to get with vb.net info regarding logical drive such as: Total Size, Free Size and Volume label ame and to write the info to some textbox or somthing similar.
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Check If Logical Drive Is CD/DVD Drive
Jun 16, 2009Is 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?
Codes To Lock Logical Drive?
Jun 5, 2010I don't know the codes to lock the logical drive What it will be if anybody knows it
View 1 RepliesAsset Tracking - Pulling Info Automatically From File On Flash Drive
Aug 26, 2010I am starting a large project here at the office. This project will be an asset tracking software. If time permits I would like to be able to develop the system so that I could put a file on a flash drive and then insert that drive into a pc, run the file and then have all the information pulled automatically but this is where I have no clue as to where to start, how to pull this information automatically. I am also planning to have the ability within the program to generate and print barcodes and maintain the database internally, would I be able to do this with ado.net ? I maintain 4 locations, all together 15 servers and 400 plus nodes.
View 4 RepliesBitwise-Logical-Operators?
Dec 29, 2010Did anyone else read this article under Visual Basic News? I thought it was a very bad treatment of the subject. I especially don't like articles like that when the code they post relies on Option Strict Off.
View 12 RepliesGet The First/last/min/max Logical Item Of A List?
Dec 17, 2010Sorting arrays are useful when you want to get the first/last/min/max logical item of a list. I.E. A list that contains numbers and you want to find the Min/Max (without LINQ), you can sort the list and pull the first/last element. It's also useful to display lists to the user in alphabetical order.
View 2 RepliesLogical And Bitwise Operators?
Aug 9, 2011According to MSDN The And operator can act as a bitwise operator OR a logical operator.The only way to know if it is used as One operator or another is, If it is on the right side of an assignment operation? for example x = 3 AND 5. I cannot find any other instances where the bitwise operator would be used instead of the logical operator, are there?
View 1 RepliesWMI To Get Drive Letter Association With Physical Drive Path Misses CDROMs?
Feb 19, 2012I'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")
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Create A Logical Comm Port
Apr 29, 2011Is it possible to create a logical serical port in vb that another application can open and read/write to?
View 2 RepliesDisplay Size Of Logical Drives?
Aug 18, 2010Display Size Of Logical Drives
View 23 RepliesLinq - .NET Logical Expression Evaluator?
May 21, 2010I need to test a logical expression held in a string to see if it evaluate to TRUE or FALSE.(the strig is built dynamically)For example the resulting string may contain "'dog'<'cat' OR (1>4 AND 4<6)". There are no variables in the string, it will logically evaluate. It will only contain simple operators = > < >< >= <= and AND , OR and Open and Close Brackets, string constants and numbers. (converted to correct syntax && || etc.)
I currently acheive this by creating a jscipt function and compiling it into a .dll. I then reference the .dll in my VB.NET project.
class ExpressionEvaluator
{
function Evaluate(Expression : String)
{
return eval(Expression);
}
}
Is there a simpler method using built in .NET functions or Lamdba expressions.
LINQ - Logical Difference Between Max And Aggregate?
Apr 6, 2011I've seen the operator Max used two different ways. The following two queries produce the same results. The MSIL code is slightly different. What is the benefit of using the Aggregate operator? Logically, is there a difference?
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Storing Conditional (Logical Structures) In XML
Jan 20, 2009I have the need to express simple conditionals as program input. The input must be human readable. Is XML suited for this? For example, I have the following conditional statement:
If AnimalType = Leopard And (SourceCountry = Kenya Or TargetCountry = Kenya) Then
ZooKeeper=Jack
Else
ZooKeeper=Jill
End If
Expressing the above in XML might look something like this:
<If>
<Conditional>
<And>
<AnimalType>Leopard<AnimalType>
[Code] .....
How best to represent conditional statements in XML? I haven't yet explored using attributes. I don't currently have the need for nested 'If' statements or the 'Else If' clause, but I'm going to try and work them in anyway. Perhaps the VB code is more 'readable' than XML can be in this case and I should create a custom flat-file format instead.
VS 02/03 Listing All Logical Drives With GetLogicalDrives
Feb 16, 2010I am listing all logical drives with GetLogicalDrives() function and i am getting that----( A: , C: , D: , K: , M:)[code]If i checks "Get FilesCount (Drive_name)" for A: (Floppy Drive) then I gets error "DRIVE NOT READY".I want CODE WITHOUT THIS ERRORRR Even if floppy drive is empty or a CD/DVD-ROM is empty.
View 1 RepliesFinding Physical Drive Number Using Drive Letter?
Jun 16, 2009I 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.
Make A Tool That Will Assign USB Pen Drive A Drive Letter?
Oct 13, 2009I 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 RepliesKnow The Code To Address Logical Block 0 Of A Disk?
Feb 25, 2012Does anyone know the code to address Logical Block 0 of a disk? This is my dump of block 0 of a multipartition disk.
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Color Coding True Values In A Logical Test?
Apr 23, 2010Can I set up a change in the font color when a certain true value comes up with a logical test - e.g. If the "value_if_true" says STOP, can I have the STOP show up in a red font and if the "value_if_false" says OK, then leave it as a black font?
View 1 RepliesLogical Error When Conveting Noun To Plurals Program?
Aug 15, 2009Public Class Final18
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
Reading And Writing Files On External Hard Drive, Code To Ensure SQL Or Data Read/write Execution In Case Of Periodic Drive Reconnect?
Dec 18, 2010The 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 RepliesDetermine If A Drive Is Local Or A Network Drive?
Dec 10, 2008Does anyone know if there is a way to determine if a drive is local or a network drive?
View 1 RepliesGetting Physical Drive Number From Drive Letter?
Jun 17, 2009I 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 RepliesHow Can Read Data From USB Flash Drive Or Pen Drive
Sep 29, 2011USB flash drive or pen drive in vb.net...
View 14 RepliesPhysical Drive Number From Drive Letter
Jun 16, 2009I 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.
Writing Info To And Getting Info From .text File Using A ListBox's Display
Jul 31, 2010I am working on a media player, and I would like to setup a local playlist feature. I am using a single ListBox and its "Display-" and "Value-Member" properties. The display is the song's Artist and Name, and the value is the song's file path (i.e 'C:UsersUSERMusicetc.').To write the file path to the .txt file, I believe I can use the following code:[code]
View 18 RepliesUsing And / Or Operators For Logical Short-circuiting: Any Compiler-directive / Workaround?
Jun 20, 2010I found using AndAlso/OrElse, all the time, VERY annoying. It reduces code readability, especially when conditioning get complicated.
View 2 RepliesCreate Quick Info And/or Parameter Info For Own Code?
Jul 23, 2009how to create Quick info and/or parameter info for own code?
View 6 RepliesRead Info From A Text File And Add Info To A ListBox?
Jun 22, 2011I am making a program, obviously, and I require some assistance. I found an explanation on how to read information from a Text file and have modified it for my needs. Here is my (modded) version:
Public Function GetInfo(ByVal playlistname As String) As String
On Error Resume Next
Dim PlaylistInfo As String
[code].....
VS 2008 Add More Than 1 Info In A Database, But The Rest Of The Info Stays The Same?
Jan 7, 2010I'm making a database app. I've finish the search, add new, and add function. What I'm trying to do is to expand the functionality of the add new item function.
View 2 RepliesVS 2010 - Fill Out A Form With Certain Info, Put The Info Into An Array?
Nov 17, 2011I am trying to do is fill out a form with certain info, put the info into an array, and write it to a listbox using loops, arrays, and maybe a function if I need one. This is for VB2010 and here is what I have so far... I think there are ways to make it shorter but I cannot figure it out.... maybe just brain dead from all the coffee I have been drinking!
[code]...