Read A File Even When Getting An 'in Use By Another Process' Exception?
Dec 9, 2010
In VB.NET or C#, I'm trying to read the contents of a text file that is in use by another program (that's the point, actually, I can't stop the program or it stops writing to the text file, and I want to periodically read out what is currently in the text file in another program)[code]in VB the code is above (a C# answer would be fine as well), however, it still throws the IO exception "The process cannot access the file 'file.txt' because it is being used by another process." Are there any workarounds in this scenario?
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Jun 12, 2011
I am writing a program that creates a file and attaches it to an email. I use a loop to create the attachment, send the email and then do it again with different information in the attachment. This works well for one tim through the loop, but on the second time through I get an error when I try to open the file for output to create the new version of the file. I get an unhandled exception of "The process cannot access the file 'c:ProjectArticles1Article.txt' because it is being used by another process.". How can I release the file from being used once the email has been sent?
[Code]...
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Dec 15, 2011
I'm trying to build a program updater based around downloading XML files from a server. The idea being that the servers XML file contains the current version number and installer location. the updater either gets dumped in the startup folder or gets installed as a service, etc. The program successfully reads and parses the current version xml file and it successfully downloads the xml file from the server.
However when I try to parse the newly downloaded file from the server I get the error:
'IOException was unhandled'
'The process cannot access the file 'C:Program Files (x86)TestServerVersion.xml' because it is being used by another process.'
The code is as follows with the error marked by a comment on line 52:
Imports System.IO
Imports System.Xml.XmlTextReader
Imports System.Net
Module Module1
[Code] .....
It's still work in progress but there's not much point in writing code to download and execute the installer if I can't work out the location of the new version. In case it's of use here is the XML:
<?xml version="1.0" encoding="UTF-8"?>
<VersionConfig>
<AvailableVersion>2.0.0.0</AvailableVersion>
<ApplicationUrl>http://192.168.2.226/EPI/2.0.0.0/</ApplicationUrl>
</VersionConfig>
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Jul 17, 2011
My.Computer.FileSystem.Rename(pathname,name) < < Throws the above exception I am trying to rename a small .jpg image, - previously (in this application program flow) accessed by the following:
btmp = New Bitmap(pathname) < < , and was followed by a btmp.Dispose well before the Rename called it. Plenty of time had gone by. But for some reason the "application process" is not releasing the pathname for me to rename or delete it.
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May 20, 2012
I have been searching throughout the forums and have yet to find an answer that will work for resolving the above problem in my program The exception is occurring within the declaration of a new streamwriter and after the closing of a previously used streamreader that accessed the same file I'm trying to write to. I think that the file is completely closed at the end of the streamreader block, but I cannot tell for sure.
This bit of code is the block just before the streamwriter declaration and the declaration itself:
Dim fn As Integer = 1 'first number for searching for file
[Code]...
If you need more info or more code chunks to help solve the problem, feel free to ask
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Dec 20, 2011
Am trying to achieve a couple of things: merge a bunch of individual text files into a combined file, move the files that were combined into a new folder. I have assigned each of these tasks to a method. Something in the first method is hanging on to the file, even though I am closing and disposing the stream reader - but I can't figure out what. I know that a process from the first method is hanging on to the file because when I comment out the first method, the second method moves the files without a problem.
EDIT The first method is returning a value for new big file. This is passed as a parameter to the second method. When the second method tries to reference this file, that is when the program throws the error (5th line from bottom) Most posts on SO advise closing/disposing IO objects, but I am already doing that. They also advise using a third party tool to investigate what process is hanging on to a file, but I already know that it is the first merge method (because when it is commented out the program runs).
[Code]....
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Aug 4, 2010
I am creating a file and then trying to read and write to it. I'm coming up with an UnauthorizedAccessException wa unhandled. My question is, How do I get around this properly or otherwise improperly to read and write to my text file?
Imports Scripting
Imports System.IO
Imports System.Security
Imports System.Security.Permissions
Public Class Form1
[Code] .....
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Sep 1, 2011
i'm having trouble reading a slightly different structured xml file , it looks like :
HTML
<?xml version="1.0" encoding="iso-8859-1" ?>
-<VESSELS>
<vessel MMSI="205416000" TIME="2011-09-01 09:31:16 GMT" LONGITUDE="3.19722"
[Code]....
I do need the different fields like time / lontitude e.d.
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Aug 27, 2010
I need to open and read a Dbase file in my ASP.NET application. When I try to open the connection, I am getting the exception "Could not find installable ISAM." I have tried the solutions in the top answer in this question, but they did not work for me.The filepath of the data file is C:devDATA.DBF. Here is the code I am using to try to open the connection:
Dim connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;DataSource=C:devDATA.DBF;Extended Properties=dBASE IV;"
Dim connection As OleDbConnection = New OleDbConnection(connectionString)
[code].....
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Nov 29, 2009
I have a text file in this format
Date TimeTickerSectorOpenHighLowCloseVolumeAsk AskVolBid Bid VolMidSpread Fact1
200802069:30:00AAPL45130.88130.88130.88130.88294028130.93850130.92700130.9250.500000
200802069:30:05AAPL45130.92130.95130.82130.9417294130.95700130.94100130.945-0.200000
[CODE]...
Basically I would like to read in this file line by line and separate every every field into a custom variable and then do some processing. So, I would read in the first record and put the data into these fields
date
time
ticker
sector
open
high
ETC
I started coding this using a TEST file that only had two fields name and a number
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Dim FILE_NAME As String = "C:aaple2.txt"
[CODE]...
I got an unhandled exception on this line: mNum = objReader.ReadLine
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May 4, 2012
i want to ask about read file and then convert to binary i am using this code
Function readd(ByVal path As String, Optional ByVal Separator As String = " ")
' Store the line in this String.
Dim line As String
[code].....
it works fine to read small file, example 2MB file, etc but it get error "Exception of type 'System.OutOfMemoryException' was thrown." when try to read 100MB file i think the error code because the file is too big
For Each Character As Byte In ASCIIEncoding.ASCII.GetBytes(line)
oReturn.Append(Convert.ToString(Character, 2).PadLeft(8, "0"))
oReturn.Append(Separator)
Next
how can i read 100MB or bigger file?or maybe is it another method / code to read a file and convert it into binary?
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Dec 9, 2009
I have an application that starts one of two external CAD applications depending upon the extension of a file in a ListView. I have been able to start up the application to view the file selected without a problem. I also have a seperate print click event for printing the file that opens the viewer application in the background and prints the file. This works perfectly for one of the CAD viewers but when I select a file that requires the other viewer application to print I get a Win32 exception and an error message stating that the file is not associated with any application and it cannot be opened. This of course is rediculous as it opens fine in the "View File" click event that opens the viewer to check the drawing.
One rather strange observation is that the CAD viewer that does print the associated file will launch the other CAD viewer application (that is associated with the other file extensions) when the "View" click event is handled even though I had not incuded the code to execute the process to start the viewer for that type of file. I realize this rather convoluted and may lie in the ProcessStartInfo arguments that I pass to the application.
Here's a code snippet:
Private Sub PrintFinGoods_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PrintFinGoods.Click
Dim message As String = "No application is associated with file"
Dim source_exception As New Exception
[code]....
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Sep 21, 2007
When I load my solution and compile it after first starting the IDE, everything works as expected. After changing source and recompiling, I get the following compile error:
Error 11 Unable to copy file "objDebugCAMDRS.Library.dll" to "binCAMDRS.Library.dll". The process cannot access the file 'binCAMDRS.Library.dll' because it is being used by another process. CAMDRS.Library.
After closing Visual Studio 2005 and reopening the solution I can compile again successfully. This is an old solution that has been fine for a long time. I just recently changed computers and reinstalled everything.I am running win XP Pro sp2, Visual Studio 2005 sp1.
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Feb 1, 2012
My program writes to a .txt file (and this is the ONLY program that writes to it) in a thread (with lowest priority), but every now and then it gets an error "The process cannot access the file because another process has locked a portion of the file" when it executes this code: swLog.WriteLine(sPacket).Other program reads from the file, not write to it, why do I get this error, and how can I get around it, or what shall I do when I get this error since I can't write to the file ?
Class
clsFile
Private swLogOrig As StreamWriter
[code].....
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Jan 30, 2010
In the process of finnishing up the application. Some NOT all beta testers have had the same problem.
An error box that states: Unhandled exceptions has occurred in your application. If you click Continue, the application will ignor this error and attempt to continue. If you click Quit, the applicatiob will close immediatly.
An error occurred creating the form. See Exception.InnerException for detailes. The error is: Could not load file or assembly "Microsoft VisualBasic PowerPacks vs, Version = 9.0.0.0, Culture=neutral, PublicKeyToken=b03f50a3a' or one of its dependencies. The system cannot find the file specified.
The details displays this: See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
Exception Text
CODE:
JIT Debugging
To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled.
For example:
CODE:
When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.
This does not happen on all the forms within the app, just some. This happens on some systems running XP and the app runs fine on others running XP. So foar it has run on all systems running Vista. It happens some of the time on Windows 7
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Aug 29, 2011
Can you kindly tell me why I am getting a runtime exception when trying to run this code?
[Code]...
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Sep 1, 2009
I am getting an error with this code.
The process cannot access the file 'C:UsersdavidDesktopTest Folderdavid 2.xml' because it is being used by another process.
how do i end the prosess after I create the file? Or am I creating it in the wrong manner.The underlined line is where the error ocures.
Public Sub AddDTData(ByVal value1 As String, ByVal value2 As String, ByVal filename As String)
dtUser.Rows.Add(value1, value2, Now.Date)
If My.Computer.FileSystem.FileExists(filename) Then
[code]....
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Sep 13, 2011
I try to open a text file and write in some text, when i run the program it says the following error:The process cannot access the file 'D:VB projectsCategory_Characteristics.txt' because it is being used by another process.
THe code is as follows and the error hits in line :
Dim objWriter As New System.IO.StreamWriter(FILE_NAME)
-----------------------------------------
Dim FILE_NAME As String = "D:VB projectsCategory_Characteristics.txt"
[code]....
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Aug 31, 2009
How can i access a file through FileStream which is being used by a window service. Actually i am trying to access a file which is also being used by our window service. I need to read data from this file. I am using below code but also getting following error:
Code:
Dim fs1 As IO.FileStream = New IO.FileStream(psPath, IO.FileMode.Open, IO.FileAccess.Read, IO.FileShare.Read)
Dim sr As IO.StreamReader = New IO.StreamReader(fs1)
sData = sr.ReadToEnd
Error: The process cannot access the file 'FILENAME' because it is being used by another process.
I tried changing FileShare.Read parameter to FileShare.None but it didn't work out. I also read below post which says that it is not possible but i think there is a way to read it like if you open a file through Firefox but still window service is accessing it.
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Oct 27, 2011
I am working with saving and deleting images. What i really want to do is check and see if an image exists in the destination folder and if it does automatically overwrite it. i couldnt figure that out so i figured i would look to see if the file was there if it is Delete it then write the new file..The issue is i keep getting this error.The process cannot access the file "FileName" because it is being used by another process. [code]
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Feb 18, 2011
Moved from Microsoft Developer Network
> Forums Home >
Development Forums >
Windows Debugging
[Code].....
MS has a patch for the OnListChanged event handler issue, even though it seems we have to pay to have access to it. This fix specifically addresses an error message when you press ESC to cancel adding a new row in .NET 2.0: [URL]
FIX: Error message when you try to press ESC to cancel adding a new row to a DataGridView control in the .NET Framework 2.0: "An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll"
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Mar 11, 2010
I have a txt file that I need to read into a listview, but I need to read from a specific line in that file. Below is a sample of the txt file to read,
6400,3200,2,95.5,84,76.6,0
1,2,-20,15,0,0,0,"NO",0,0
TOTAL GPM= 6400 HWT= 95.5 CWT= 84.0 IWBT= 76.6 ALTITUDE= 0
CODE]...
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Dec 4, 2011
The process cannot access the file 'C:UsersJoshuaDocumentsTest1.txt' because it is being used by another process.Now the Problem. When i step through my code, it will do as intended, e.g. clear all contents of test1.txt. when i run it at run time it throws this error. The reason for it throwing an error is the text file is reading string, int, string, and the txt file has a string including in the int part, so i'm making it so you can empty a corrupt file.
vb
Imports System.IO
Public Class Form1
Private norepeat As Boolean
[code]....
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Oct 28, 2011
When I google how to read and process XML files in VB.NET there are heaps of different ways - what way is right? which way is quickest?
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Jan 12, 2010
this process problem only happen when i add the line below (red colored (line 12 and 19))the error pointed at the colored (blue (line 32)) at saving the image to the database
here's the code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
OpenFileDialog1.Title = "Set Image File"
OpenFileDialog1.Filter = "JPEG Files|*.jpg"
OpenFileDialog1.DefaultExt = "bmp"
[code]....
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Aug 22, 2010
I'm trying to read another process's memory starting from mbi.BaseAddress to mbi.RegionSize using the function ReadProcessMemory, however I only succedeed to read 1 address at a time and it takes like forever to finish, the result being stored into a byte() variable, calling the readaddressmemory 1 million times instead of only 1 for example.
[Code]...
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Apr 3, 2012
I'm attempting to read the full contents of a console process (after 3 seconds) with the code below:
Dim NewProcess As New System.Diagnostics.Process()
With NewProcess.StartInfo
.FileName = EXE_PATH
[code]....
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May 15, 2009
Read/Write Process Memory?
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Nov 17, 2010
i have tryed so many times now so is there some one that can Read/ Process Memory in vb.net 08 ?
this is what i got
Dim help2 As Integer
Dim HP_Have As Integer = &H574
Label5.Text = ReadProcessMemory(proc.Handle.ToInt32(), HP_Have, help2, 4, 4)
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May 5, 2011
I am currently facing an issue when i get response from webservice, after reading response in response stream i want to load this response stream using xmltextreader. but when Load(xmlTextreaderObj) is called, it raises an exception displaying that "Root Element is Missing". Here is code which am using.
Dim wResp As HttpWebResponse = CType(wReq.GetResponse(), HttpWebResponse)
Dim respStream As StreamReader = New StreamReader(wResp.GetResponseStream())
Dim Resp As String = respStream.ReadToEnd()[code]....
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