I am using VB.NET 2008 Express Edition to access Serial Port which is a USB to Serial port. Since this is removable, the app user can disconnect it at any time in app. I am getting an unhandled exception when I remove the USB Serial Port.
View 2 RepliesI have a little code for get the serial port available in the system.
For Each pn As String In IO.Ports.SerialPort.GetPortNames
Debug.WriteLine("NAME : " + pn.ToString)
Next
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So, The PORT1 and PORT5 its ok (because this are real serial port, with a real RS232 interface), but PORT4, I don't know.
How I can do for get only true serial ports ?
i am a absolute beginner and i want to use vb to receive data from micro controller through serial port using rs232 standards, i found this code to receive the data serially, can any one tell me where should i paste this code, so that the data received will be displayed in message box.Private Sub DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) HandlesSerialPort1.DataReceived
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The link below has code to connect to a modem thru the serial port but it is for an earlier version of VB. when I convert the code, it does not fully convert and has 4 errors that prevent building the project. can someone tell me what needs to be changed or added?
[URL]
Note: the error: not CLS-Compliant
I'm debugging a VB app where I'm using a comm port attached to a bluetooth radio paired to another bluetooth radio in order to communicate with a remote barcode scanner. The pair of bluetoooth devices basically work as a serial cable replacement. Sometimes it works fine, but after a while I get an UnauthorizedAccessException message which breaks the program (see attached jpeg).
I only get this when I use the radios and not when I use a direct cable. I wonder if it has something to do with other bluetooth devices nearby trying to communicate with mine. I've used the .NET Framework 2.0 Confuration tool to adjust the zone security to give full trust to MyComputer, so I don't think it has to do with security, but I'm really going beyond my area of expertise here. I don't know what's going on.
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I would like to create a local user on a windows 7 PC, but gets the following error when commitchanges runs. I am administrator on the PC:
A first chance exception of type 'System.UnauthorizedAccessException' occurred in System.DirectoryServices.dll
Here is my code:
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I am using Visual Basic 2010 ultimate in Visual Studio 2010.
I have a stand alone VB.Net 2005 application that uses a serial port that generally stays open while the application runs on a Windows XP system. In trying to bullet-proof the UI, I ran into a problem when the USB to Serial Converter normally used to provide the serial port is disconnected while the serial port is open. In trying to handle the resulting error when accessing the port, I find I cannot close the port.
When trying to do so, the error message says something like "unable to close the port. You may not have sufficient permissions." Reconnecting the USB/Serial Converter does not reactivate the port.
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I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
View 7 RepliesI have a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
View 2 RepliesIf I uninstall the COM1 and reboot, it works. If I shut down (power off) and restart, I get the message below. If I uninstall then click on Scan for Hardware Changes,The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name:portName
View 8 RepliesGet this when attempting to write to the registry.
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I get the error on the last line, what's wrong with it?
Dim filePath As String = "~/Images/FleaMarket/uploadedImages/" & User.Identity.Name.ToString & "/" & itemID & Path.GetExtension(fuImage.FileName)
MsgBox(filePath)
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Dim filePath As String = "~/Images/FleaMarket/uploadedImages/" & User.Identity.Name.ToString & "/" & itemID & Path.GetExtension(fuImage.FileName)
MsgBox(filePath)
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I get an error "System.UnauthorizedAccessException: Access to the path 'D:TriceDealsII Updated13-10-11Tricedeals II(4)ImagesFleaMarketuploadedImagesmitali2054' is denied"
I searched for that error but got nothing.. strange.. so I'll ask..ok I have some code that I'm using to open MP3's and change the titles so I dont have to listen to audiobooks out of order....got this code from the web.. <below>I got it to open one.. and see all the tag's etc.. now I wanted to change oneof them.. but when it opens it.. I get that permission error.. the file is in c:/users/kevin and the file has permissions like normal.. but it wont letme open it..this is the open command its trying..FileOpen(intFile, mstrFilename, OpenMode.Binary, OpenAccess.ReadWrite, OpenShare.LockWriteEven tried changin the UAC settings to full priv.. that didnt work.
View 4 RepliesSystem.UnauthorizedAccessException was unhandled. I'm following motcom's tutorial on creating a simple directory explorer, and everytime I try to expand I get the error above. How can I be getting that error on my own computer ? I'm on my administrator account, it happens even if I compile it and run it as administrator also. What could be causuing this ?
View 1 Repliesi am creating an application that needs to read a text file from an external hard drive, the paths etc are all correct however i am getting the error System.UnauthorizedAccessException"i have searched through various forums and googled it and the only solution i can find is to allow the .net user permissions however i dont have this user/group on my system.also i am using Windows 7, dont know if that should make a difference.
Public Class frmMain
Public Structure Movie
Public Name As String
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In my application I need to rename a folder ( in order to replace it) and then to delete it
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I want to search an string in all files on C:.For this I use list = My.Computer.FileSystem.FindInFiles("C:", "Bula Bula", CaseSensitive, SubDirectorys)So when the search come to "c:Documents and Settings" for example I get this error:
System.UnauthorizedAccessException was unhandled
Message="Der Zugriff auf den Pfad "c:Documents and Settings" wurde verweigert."
Source="mscorlib"
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My application needs to change the default signature of outlook and I need to change the value of a registry key for this. But I get a error that I probaly don't have enough permissions. Strange thing is, if I change it manually it doesn't complain.
Error:System.UnauthorizedAccessException : Cannot write to the registry key.
Happens at the 2nd line:
vb
Dim subkey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("SoftwareMicrosoftWindows NTCurrentVersionWindows Messaging SubsystemProfilesOutlook9375CFF0413111d3B88A00104B2A6676�0000002") subkey.SetValue("New Signature", Text.Encoding.Unicode.GetBytes("Eigen"), Microsoft.Win32.RegistryValueKind.Binary)
In my VB.NEt 2008 application, I am frequently creating and killing the file Fileopen and Kill(Multiple times ). It was working fine with Windows XP. But in Windows 7, it is worjking fine for some time (creating and killing theile properly) and then t is creating unautoriszed Access exception after some time .it does not happen immediately and it happens intermittently.
Sampel code is as give below:
Publicl_filenumber as Integer
Procedure 1:
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This is a slightly tricky one, so bear with me...I have a simple little method:
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the service is for now working correctly. Anyone have any ideas what would cause such an intermittent failing? I'm assured by co-workers that nothing was changed over the weekend (not manually at least). Baffled...
Ok so I have a small problem with an error I am catching. It only produces the file name and not the actual path of the file.I want to delete a folder and all the files and folders inside of it. However an error is thrown when a file is "read-only". A quick fix would be to set the attributes of that file to normal and then try again, the only problem is the error doesn't give you the location of the file.
2008
Module Module1
Sub Main()
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Im having problem with the Serial Port. When i run my program, "Access to the port 'COM1' is denied". What does that mean? Im not sure whats happening because theres no error in my code. Someone suggest me to use 'COM2'. Which is also the same result. I have a microcontroller, programmed and run it. And i need to capture the data onto my vb, which is on a multiline textbox. How to i do that?Just to double check my code?
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I am running vs 2008 and and trying to connect to an sql server 2005 to do userauthentication, but the error message i get is"Access to the registry key 'HKEY_LOCAL_MACHINESOFTWARESmartinfoLibServer' is denied" and the message "A first chance exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll" also shows in the immediate window.
View 1 RepliesI'm running windows 7 64 bit and using VS 2010. I'm trying to use the filesystem.getfiles to find a file on the computer and return the path for it. However, when I search C:/ and its subdirectories, it always throws an error: "A first chance exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll"
I've looked everyone online and can't find a solution. I have administrator privileges and really I dont want people who use my app to have to adjust security settings for this to work. Is there not a way to search the C drive for a specific file and return its path? [Code]
I am trying to buld a DLL in VB.NET 2010 that will be use to control a vending machine.Whin a call into the DLL to a function to open and setup the comport the first time its opens it just fine, but if a call into the DLL again it does not know that the port is open even if it is still open. I can check with another program and is shows the port is open and if I try to call into the DLL again to open the port I get an error that the port is already open. Any idea how to set this up so it will work
View 7 Repliesi'm creating a windows form to send/receive data to/from serial port.At first : i send the data as string to the serial port .Second: i tried to read the string again for test the successfull transmission , but i recieved empty string
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I can find documentation (preferably with code samples) that will guide me through all the steps to activate and read from a serial port?
View 6 RepliesFor my application a need to set a breakstate on/off of 25ms.In Xp this runs fine when I set breakstate=true and wait for 25ms and then breakstate= false and wait 25ms.In CE6.0 when I set breakstate = true, it only throws a puls.It is even not possible to keep breakstate on.
how to solve this or is there an alternative to simulate a breakstate?
can we communicate to Serial port COM1 through Microsoft Robotic Studio?We are developing wireless robot which will take data from serial por
View 14 Replies