I'm checking is a file exists as follows.
If txtGradeObs.Text = "" Or Dir(txtGradeObs.Text) = "" Then
MsgBox("Specify the Grade job of Obstructions", vbExclamation, MsgBoxTitle)
Exit Sub
End If
I get an error if the drive does not exist - i.e. G: rather than C:. It used to work in VB6. How can I get it to work.
I've created the following function and thrown it inside of a timer:
[code]...
It works, but it keeps trying to open media player for each process it looks like. I need to continuously run the function so that Media Player opens when it's closed.how to make sure it opens only once when the process doesn't exist?
How can we check if a Drive exists in the system
View 4 RepliesI need to detect if a file exists within drive C: but I do not know in advance in which directory it should be located so this means that I have to search the entire disk. Is there a way to perform this process directly (through an existing method for example) or do I have to write code for getting the directory structure and search each directory?
View 3 RepliesI am trying to write(what I thought would be a simple piece of code. I was wrong.
What I am trying to do is to get an application to check if a file exists, However, I have it wrong as the file obviously does exists, but when I run the application it tells me it does not.
Imports System.IO
Public Class check
Dim checkfile As New FileInfo("C:\HelloWorld")
[Code].....
I'm using then next method to check if a directory exists but it seems it doesn't work.
[Code]...
im trying to make code to check if a file with the same name exists twice in the same dir one with .dds and one with .veh file extentions and if they do put in a listbox but if only one exists then it puts it in another listbox i have made code to filter .dds in to one listbox and .veh in another but i dont know how to make the "check" if they are both there
this is the code i have to split them at the mo
For Each files In dir
Dim path() As String = files.Split("\")
Dim chunk As Integer = path.Length
[Code]....
but i wanted the Else for the .dds files that dont have the matching .veh file
I am trying to check whether username entered by user is already exist or not in database. But, I dont know how. The codes are below.
If TextBox3.Text = TextBox4.Text Then
Dim conn As New SqlConnection()
Dim cmd As New SqlCommand()
[Code].....
I think this is a really simple question to answer but I can't find a better solution. Basically I am importing data from an external source and as I go through importing each for I am doing a for loop to see if the row already exists; this is taking a life time and I feel it is a very simple way of doing it. Is there a better way to see if a row already exists using specific columns and key indexes?
View 5 RepliesI'm using ADO.Net to work with an Excel Document. Essentially, I'm looking up values in a table called "source" and creating a new table called "result" which will be populated with the results of my query.
I have a couple of questions.A) How can I check if a table exists and create a new one if it doesn't? B) Is a table the same as a sheet in Excel?[URL]...
I haven't used System.IO before, and I'm a little stuck.I need to check if a file exists, for example C:Documents and SettingsverraineDesktopSURNAME Firstname v1.docx, if this file exists the filename has to become v2, and so on. Usually there will only be a v1, but in the case that a clients position changes we have to be able to save the new version without overwriting the old one.
How would I be able to do this efficiently? I'm uncertain to say the least. Because, if I manage to find out how to save the file as a different number, that's alright, but if that next number exists as well? I can only think of ways to do this that require a lot of code.
i have a checkbox on a form, which is of type boolean in the database .when the user check the checkbox, before the data enters the database, the program should check if there exists already a "1" on the database for this field.If so the user is not allowed to check the depot.
View 5 RepliesCompletely new to ASP.net
Page Language="vb"
Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
I want to check on the server for the existence of an image, then if it does exist, display the image wrapped in other code. E.g.
if "/images/name.jpg" exists then
<div><img src="/images/name.jpg"></div>
else
Do nothing.
Seems really simple to me but NOTHING I have tried has worked (compilation errors). I've tried examples using system.io, DIM stuff with 'FileInfo', Set fs. FileInfo examples produce 'not defined' errors, 'Set' says it's outdated and not used anymore and so on.
I want to check if an Outlook folder exists, if it doesn't then create it & if it does then carry on with other code. I can create the folder as a sub folder of the Inbox but once it is created I get an error because it is still looking to create when it's already created. I have tried to capture the error but still no joy.
[Code]...
I am having a ton of trouble trying to check if a record exists. I continue to get a data mismatch on my command.ExecuteScalar().
Code:
Protected Sub btnRegister_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnRegister.Click
[code].....
I am having problems verifying that the drive is mapped. The code I have is this:For the Public Class I have this:
Dim wshNet As New IWshRuntimeLibrary.WshNetwork
wshNet.MapNetworkDrive("Z:", "\\10.21.2.218\Share", True, "wecon\sophosuser", "soweco")
To remove the drive I am using:
'wshNet.RemoveNetworkDrive ("Z:\", False, False)
What I am looking for is how to verify that the z drive is mapped, and if so then run the unmapping drive command.When I try to use a if wshNet. anything the stupid thing won't return a true or false value?I searched all through the net to find some sort of If drive mapped = true, however nothing comes up that I can implement.
I'm trying to download files using the Net.WebClient call to DownloadFile
Using client As New Net.WebClient()
[code...]
Is there a polite way I can ask for the file instead of calling DownloadFile, and handling the exception ?
I am adding the text of a label into a datagridview. But before i do the insert, i want to check if the text does not already exist in the datagridview.
View 1 RepliesI have been on MSDN about this and searched but it's not quite telling me what I'm after. I've extracted a list of file names from an Excel spreadsheet and want to check whether they all exist in a directory which a user can select in a text box. It feels like I'm nearly there with it but currently my listbox is displaying everything, I want it to just show the files that are missing. I'm a beginner so I'm not exactly sure if I'm even telling it to compare the two things properly, I've tried a couple of ways of checking if a file exists but neither seem to work.[code]
View 1 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 RepliesIs it possible to use VB to see if a certain URL exists. For example see if [URL]
View 3 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 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.
Is there any better performance by checking for a true value like this:
[CODE]..............
Than like this:
[CODE]..............
Controls: textbox, combobox and button
I want to have a condition to find out if the value I enter in the textbox exists in the combobox. The combobox reads a text file.