vb.net check if file is being used by another process (2023)

vb.net check if file is being used by another process

You could do the following to check if the application has other instances running: Process.GetProcessesByName("app.exe", "Machine1").Length > 0 Which is a more appropriate way of checking if the app is running. Have a look at File.Move MSDN documentation. It details what exceptions are thrown.

Public Function IsFileInUse (sFile As String) As Boolean Try Using f As New IO.FileStream (sFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None) End Using Catch Ex As Exception Return True End Try Return False End Function You should check to see if the file exists before calling this function.

VB.NET. On Form load always check if you can open a file exclusiv. Access to a file which is being used by another process in C#.

first you open your file for reading here : Dim objReader As New System.IO.StreamReader(NAME1) //1st open Second you call the form1 : Application.Run(New Form1()) in that Form you have : Dim objWriter As New System.IO.StreamWriter(FILE_NAME) //2nd open. But wait you didn't close your file so you can't open it 2nd time for writing.

How to check if a file is open by another user

Expand System Tools > Expand Shared Folders and click Open Files Step 5: Find the path to that Folder and close it! Find the folder, Right click on it and click on Close.

You may view open files using Computer Management (compmgmt.msc) by selecting System Tools\Shared Folders\Open Files in the left pane. Computer Management is available from the Tools menu within Server Manager. Larry Struckmeyer [SBS-MVP] If your question is answered, please mark the response as the answer so that others can benefit.

Check if this one works. Fix-5 Empty Temp folder-Emptying the Temp folder has solved the problem for some users. 1. Press Windows key+R to open Run window. 2. To open the temp folder, type this simple command and then hit Enter. %temp% The Temp folder will open on your computer. 3.

The document is shared over a network, and another user has it open. Resolution. To resolve this issue, first confirm that another user on the network does not have the document open. If the document is in use, open the document as read-only. If it is not in use, quit all instances of Word, and then remove the owner file. To do so, follow these steps.

An issue with trying to find out if a file is being used by another process is the possibility of a race condition. You could check a file, decide that it is not in use, then just before you open it another process (or thread) leaps in and grabs it (or even deletes it).

C check if file can be written

The basic steps for using a File in C are always the same: Create a variable of type "FILE*". Open the file using the "fopen" function and assign the "file" to the variable. Check to make sure the file was successfully opened by checking to see if the variable == NULL.

If the file is opened successfully fopen ( ) loads it into memory and sets up a pointer which points to the first character in it. If the file cannot be opened fopen ( ) returns NULL. “w” – Searches file. If the file exists, its contents are overwritten. If the file doesn’t exist, a new file is created.

FILE *fp; fp = fopen ("data.txt", "r"); fclose (fp); The fclose function takes a file pointer as an argument. The file associated with the file pointer is then closed with the help of fclose function. It returns 0 if close was successful and EOF (end of file) if there is an error has occurred while file closing.

Tests whether the file can be accessed for execution. You can take the bitwise inclusive-OR of any or all of the last three symbols to test several access modes at once. If you are using F_OK to test for the file's existence, you cannot use OR with any of the other symbols.

Input/output with files C++ provides the following classes to perform output and input of characters to/from files: ofstream: Stream class to write on files; ifstream: Stream class to read from files; fstream: Stream class to both read and write from/to files. These classes are derived directly or indirectly from the classes istream and ostream.

Most people try to detect an open file before they try to write to it but that is the incorrect approach. A file can be opened for reading and writing by different people at the same time. In general you'll just try the operation and if it fails, and you're interested, then you can check the exception to see why it failed.

vb.net if file is open close it

This new application is in vb.net rather than excel vba - it is self opening and cannot be closed (except for a very robust and heavily tested internal timer structure) this will check if they have the workbook in question open and then close it. As with most code the problem is the STUPID END USER..

End If. Next. If returnval <> "fopen" Then. Workbooks.Open (FilePath) End If. End Sub. ADJUSTABLE PARAMETERS. File Name: Select the file name of a workbook that you want to check if it's open by changing the file name "Parameters.xlsx" in the VBA code. File Path: Select the file path, including the name of the file, by changing "C:\Excel\Parameters.xlsx" in the VBA code.

FileInfo check if file is locked

The following FileIsLocked method returns true if a file is locked for a given kind of access. For example, pass this routine the access value FileAccess.Write if you want to learn whether the file is locked to prevent you from writing into it.

Function OpenDataFile(ByVal FileName As String) As Byte() ' Check the FileName argument. If FileName Is Nothing OrElse FileName.Length = 0 Then Throw New ArgumentNullException("FileName") End If ' Check to see if the file exists. Dim fInfo As New FileInfo(FileName) ' You can throw a personalized exception if ' the file does not exist. If Not fInfo.Exists Then Throw New FileNotFoundException("The file was not found.", FileName) End If ' Open the file.

Now you know how to check for a file (as long as it isn't opened in Notepad) to determine if it is locked by some other user or application. About the Author Boe Prox is a Microsoft MVP in Windows PowerShell and a Senior Windows System Administrator.

The process cannot access the file because it is being used by another process vb net

Fix: The Process Cannot Access the File Because It is Being Used by Another Process. If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption.

2. Setting a New IP Range –. If The Process Cannot Access The File Because it is Being Used by Another Process BitTorrent issue is related to IP conflict, and you’re trying to resolve it through running Netsh command, then setting a new IP Range might prove helpful.

Accept Solution Reject Solution. The most possible chance might the file your uploading is already open or in use. You can open the task manager and check for the file. You can close any other that might have access to the file and try uploading again. Permalink.

C# check if file is locked

The following FileIsLocked method returns true if a file is locked for a given kind of access. For example, pass this routine the access value FileAccess.Write if you want to learn whether the file is locked to prevent you from writing into it. // Return true if the file is locked for the indicated access.

To test the program, start it and then open the executable file in Microsoft Word. (It will look like gibberish in Word.) Then press the program’s Find Locks button. You should see processes named howto_find_file_locker.vshost (Visual Studio running the program) and WINWORD. If you then double-click the executable file, you can run the program again.

case 'L': try { fileStream.Lock(textLength - 1, byteCount); Console.WriteLine("The specified part " + "of file has been locked."); } catch(IOException e) { Console.WriteLine( "{0}: The specified part of file is" + " already locked.", e.GetType().Name); } break; // Unlock the specified part of the file.

lock(obj) { // perform activity 1 // perform activity 2 // perform activity 3} This code is similar to: Monitor.Enter(obj); //acquire lock on object // perform activity 1 // perform activity 2 // perform activity 3 Monitor.Exit(obj); //release lock Ofcourse its not. they are used in try/finally so it ensures that lock is always released even if exception occurs.

The file could not be opened because it is locked by another process

If The Process Cannot Access The File Because it is Being Used by Another Process BitTorrent issue is related to IP conflict, and you’re trying to resolve it through running Netsh command, then setting a new IP Range might prove helpful. Below are the commands helpful in resolving a DNS and Quickbook Conflict.

Fix: The Process Cannot Access the File Because It is Being Used by Another Process Several Windows users are encountering the “ The process cannot access the file because it is being used by another process” error. Most of the time, the issue occurs when the user tries to run a netsh command.

On the File menu, click Exit Task Manager. Start Windows Explorer, and then browse to the folder that contains the document file that you tried to open when you received the error message. Delete the owner file. The owner file is located in the same folder as the document that you tried to open.

You can check if a file has a handle on it using the next function (remember to pass the full path to that file): import psutil def has_handle (fpath): for proc in psutil.process_iter (): try: for item in proc.open_files (): if fpath == item.path: return True except Exception: pass return False. Share.

Restart file explorer through task manager. Once again, open Task Manager and go to the Processes tab. Here you will find the Windows Explorer program currently in use. Select the process and tap on the “End Task” option. Go to File at the top of the Manager window and select “Run New Task”.

Now open the file and see if the problem disappears or not. Note - to find Excel path, you need to find XLSTART path. Excel folder contains XLSTART folder in itself (In case, your XLSTART path is not in Appdata) 1. Open Excel 2. ALT+F11 3. If Immediate Window is not visible, type CTRL+G. Same can be also be accessed through View > Immediate Window 4.

Go to the folder and right-click, select “Properties” and open “Security” tab. Click “Edit” then “Add” and press “Advanced” button on the new window. After click “Find Now”. The last step you need to do is to find something like SQLServerMSSQLUser$UserName$SQLExpress and click ok, to all the dialogs opened.

Step 1: Go to Folder Options. In Windows Explorer, click the Option key to make the hidden menu appear, then select Tools / Folder Options.

It's most likely because another program is currently trying to use the file. This can occur even if you don't see any programs running. When a file is open by another app or process, Windows 10 puts the file into a locked state, and you can't delete, modify, or move it to another location.

Vb net check if streamwriter is open

StreamWriter writes data to a text file. It can write lines of text or strings to the file. It is easy to use. Ideally it should be used inside a VB.NET Using statement. This ensures the correct disposal of its resources.

In this article. This example opens a StreamWriter object with the My.Computer.FileSystem.OpenTextFileWriter method and uses it to write a string to a text file with the WriteLine method of the StreamWriter class.

Use Null to redirect output to a StreamWriter that will not consume any operating system resources. When the StreamWriter.Write methods are invoked on Null , the call simply returns, and no data is actually written to any backing store.

Some applications lock files so you cannot write, read, delete, or otherwise mess with them. For example, when you open a file in Word, it locks the file so you cannot delete it or open it for writing with a Visual Basic application. Function FileIsLocked returns True if a file is locked for a certain kind of access.

Check if file is open

public bool IsFileInUse (string path) { if (string.IsNullOrEmpty (path)) throw new ArgumentException ("'path' cannot be null or empty.", "path"); try { using (var stream = new FileStream (path, FileMode.Open, FileAccess.Read)) { } } catch (IOException) { return true; } return false; } If you mean that you want to check if a file is open before you try to open it, then no.

Found a better way: :start timeout /T 5 if exist %1 ( 2>nul ( >> %1 (call ) ) && (goto ende) || (goto start) ) else ( exit ) :ende YourCode. This will check every after 5 seconds for "is the file in use" if it its it will start again. if not it turns to ende where you can do your next options. Share.

File Name: Select the file name of a workbook that you want to check if it's open by changing the file name "Parameters.xlsx" in the VBA code. File Path: Select the file path, including the name of the file, by changing "C:\Excel\Parameters.xlsx" in the VBA code.

Vb net file Open exception

The Try / Catch block is VB.NET's preferred syntax for exception handling (it replaces the older On Error syntax which predated.NET). When anything inside of the Try section throws an exception, execution will jump to the Catch section. Once execution of the Catch section completes, it then jumps to the Finally section.

This example opens the file Testfile.txt, reads a line from it, and displays the line in a MessageBox. Dim fileReader = My.Computer.FileSystem.OpenTextFileReader("C:\testfile.txt") Dim stringReader = fileReader.ReadLine() MsgBox("The first line of the file is " & stringReader) Remarks. Only text files can be read with a StreamReader.

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