Overwrite /update A File That Is Currently Being Served By IIS?
Feb 21, 2012
My company puts out a monthly newsletter which I host on our internal website. I have a page for the author of the newsletter to upload the latest version. Once the author has uploaded the latest newsletter, he sends a broadcast email to announce the new newsletter. Employees invariably check the new newsletter and send feedback to the author with corrections that need to be made.
Once the author has made the necessary corrections (typically within an hour of sending the broadcast email), he revisits my page and replaces the latest version with the updated newsletter.
Immediately following the replacement (or update, if you will) of the newsletter, anyone attempting to access it gets a 500 - Internal Server Error.
My IT guy who maintains the server cannot delete/rename/move the file because of a permissions error and has to do a lot of convoluted things to get the file deleted (and once the file is deleted, the author of the newsletter can re-upload the corrected copy and it works fine.
My IT guy and I are pretty sure that the problem stems from that I'm trying to replace the file while IIS is actively serving it to users (which I thought of and thought that I had coded against happening).[code]...
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Oct 16, 2010
I have written a generic file serving handler in asp.net/vb.net..I recently moved to a windows 7 box and am now debugging under IIS7, and this is where the problems occure.Whenever I serve a file to either FireFox or Chrome (IE8 works fine) from IIS 7, the download will fail.
- In FireFox the error is "[some file name and path].part could not be saved, because the source file could not be read."
- In Chrome the error is "Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error."
- In IE8 it works fine
If I run the same code in IIS6, it works fine.If I run the same code in the Visual Studio virtual web server, it works fine (on windows 7 or XP).I am rather concerned about this as our production web server will soon be IIS7; which I'm starting to really love, and would hate to revert to IIS6 just because this won't work in IIS7.I've tried a number of different patterns.It seems to always fail on the Flush() line with the error "System. Web.HttpException = {"The remote host closed the connection. The error code is 0x8007 0040."}"One thing I have noticed, if I move the flush statment to the finally clause or remove it all together; firefox will attempt to read the entire file - it appears to be looping through the entire block of code just fine, until it hits the flush statement.If I remove the flush statment I still get an error and it still tries to read the entire file before asking me to save it.[code]
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Feb 11, 2010
How can I save an Excel-file, which I'd edit with VB.NE, to a file, which already exists? Evertime there is a dialog: File already exists. Do you really want to overwrite? YES|NO|Abort
How can I overwrite without this dialog?
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Jul 15, 2010
I have a program that records time data in database when the user performs task. When I published the program for user install, I did not specify any update location. So, since initial creation, whenever I need to update the software, I simply install the new .exe file and this overwrites the old version and erases all data created by the old version (similar to uninstall and reinstall). Is there a way to only install updates to the software so that all data is not erased each time I need to update? Seems like this would be simple, but I can't figure out how to do it and am quite new to programming. I will eventually want to have the software check for updates online, but I need to understand how to update from a local file location first (without erasing current data).
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Mar 10, 2011
I'm trying to get a save file dialogue to overwrite a file with the same name.
Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
If RadioButton16.Checked Then
[code]....
I keep getting an error saying "Unhandled exception has occurred in your application." Then the next paragraph says "The process cannot access the file 'E:Copy of Release+Fontsob.txt' because it is being used by another process."
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Nov 8, 2010
I am trying to download a file off my web server (easy) but the file its downloading is the updated version of the file running. I finally was able to program my automatic update software the program simply downloads a .txt file from my web server, reads it, and if the the version = (new version here) then download. If not, then go to another form. The problem I am getting though, is when the version is outdated, the file will go to download the new .exe and it gets and error saying "File already exists"
[Code]...
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Jan 16, 2011
I am trying to get a text file to be overwritten since it's already there. The thing is, that I'm not trying to overwrite a specific file. In fact, EVERYTHING must have the right name, or my project won't turn out right: http:[url]....However I don't have that problem any more because I solved it. Now my problem is much more simple. Again, I'm NOT trying to overwrite one specific file, so I couldn't say something like,
HTML
RmDir("C:KQQuestion1")
I need a way to overwrite any file name.
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May 7, 2010
I've been searching all over the web to find a code to copy a file to a destination. I found one, but i need to get one so it can overwrite cause i get error when the file already exist in both location.There is my code:
Dim FileToCopy As String
Dim NewCopy As String
FileToCopy = "C:\test.txt"
NewCopy = "C:\NewTest.txt"
[code]....
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Jul 6, 2009
I have a text file to read. Then i took the lines from the text file and write in temporary file. Now i want to overwrite the lines from temporary file to original file.My original file contain Top and bottom part.
My temporary file look like this
4.5 28 Red (T1 ) [1 12.86 53.8] 100.00 100.00 198452 -1309 | 11.0 28 Red (2 13.10 04.0) [T1 ] 130611 2948 100.00 100.00
1.5 28 Blue (T2 ) [1 07.06 59.1] 102.54 100.00 190456 39339 | 6.5 28 Blue (2 03.00 03.0) [T2 ] 132111 -67725 102.54 100.00
[code]....
So i want to overwrite the lines before "|" to the Top part and the line after the "|" to bottom part.. I attach my original and temporary files.
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Jan 14, 2010
How can I force SaveFileDialog in Visual Basic 2008 not to allow overwrite file or Files?To aim is not enough.
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May 4, 2011
I have a couple of files which I have to update periodically through a process written in VB.net . These files are on a server and part of a domain that many users can access. These files should never be written to as they are for reference only. I need to be able to overwrite some of them even if a user has them opened. Is it possible to do this? Presently the files permissions are not set as read-only but I can do this as long as the user under which the process runs will still have permission to overwrite them.
UPDATE: thx for your responses. The files are pdf and are opened by clicking on them from windows file explorer. This also happens when a user simply has the file selected in windows explorer.
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Jun 6, 2011
I'm creating an program that needs to delete/overwrite an image called "Image.jpeg".i have to code to upload already, but i need to be able to overwrite image.jpeg, so i was thinking of: delete file, upload new version or[code]...
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Jul 6, 2010
I am wondering how I can replace a file locked by another application. I am using VB.NET from 2008.
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Nov 12, 2009
Is that even possible in Vb
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May 19, 2012
Here's the catch - for the program I'm making I would like to avoid creating a copy of the file in its totally unencrypted state (I'm using a modified, quick-and-dirty XOR cipher for that. It's secure enough for my purposes and faster than the stronger encryption). Anyhow, what I would like to do is read a block of data, de/encrypt it (in memory) and then write the changed bytes to the same location they previously would have been within the file.
I've found the problem a little outside my programming abilities, so I was wondering if anybody had a pre-made solution, links to appropriate examples, or an all out explanation.
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Oct 2, 2008
I was wndering if its possible to change specific data in a text file from VB.NET code? i want to use a save game feature, and update the score of the user currently logged in, but i dont know how to do this. Any ideas? my text files stores 4 fields from the user; Username, Age, Score and Password.[url]...
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Dec 10, 2010
I have a log file that is open and in use by another program, and I read it's contents with the following:[code]This works for reading the text from the file while it is still in use by the other program, however, immediately after this I need to truncate the text file (without deleting it) so that it is blank again. But the file will still be in use by the other program.[code]But I get the "in use by another application" exception. I've tried looking in StackOverflow and googling but I can't seem to find an answer, and I can't find a way to do this with filestreams either, or I would try to use Dim fs As New FileStream(FullPath, FileMode.Open, FileAccess.Write, FileShare.ReadWrite)
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Feb 6, 2010
i have this simple code for reading image from file
pic = Application.StartupPath & "\medlem" & "\" & txtp.Text & ".jpg"
Dim myimage As New Bitmap(pic)
Try
[Code]....
the new image comes from the computers web camera.
the only thing i cant get to work is how to overwrite the file.
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Jul 9, 2009
I have been working on a project in .net. I can now write to a txt file using [code]What I need to do though is instead of writing new lines to the file is replace what is all ready there with new text.
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Jan 12, 2010
How to read from a line in vb .net, I need to do the following:
change the line in a text file
[Path] = "c: hiscertainpath"
With this line
[Path] = "c: hatother
ewerpath"
These paths will most certainly be different lengths, so I need to either replace what's in the quotes or erase the line completely and enter a new one, but in the same spot, not appended to the end of the document.
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Jan 24, 2012
I would like to know how to convince the SaveFileDialog to overwrite a read only file. Currently, it is throwing up a dialog and not even getting to my FileOk method.
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Oct 20, 2010
I'd like to open a text file and not allow any other processes to write to it. I understand I can do this with the following FileStream:Dim fs As New FileStream(_FilePath, FileMode.Open, FileAccess.ReadWrite, FileShare.Read)
Once I have access like this I need to read all of the lines (I will use a StreamReader(fs)) and then I will need to write to the file (I will use a StreamWriter(fs)).
The problem here is that the StreamWriter won't allow me to set the append mode to false (so I can overwrite all text in the file) when I use the filestream as a parameter instead of the file path. So all text written with the StreamWriter is appended onto the text which I don't want. If I use a StreamWriter with the file path (which will let me set append to false) as the parameter instead of the filestream it will be locked out because of the FileStream FileShare. How can I still have exclusive access to read and write to the file but still be able to overwrite the existing text (append mode false)?
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Jan 20, 2012
am facing overwriting file in window mobile 6 professional.bellow are my code.
when the system start loading:
PrivateSubForm1_Load(ByVal sende System.Object, ByVal System.EventArgs)HandlesMyBase.Load
[code].....
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Jan 1, 2009
How do I have it overwrite the file if it already exists with My.Computer.Network.DownloadFile?
Here's the code for where its needed but, this is not all of the code
My.Computer.Network.DownloadFile _
("http:mirror.cc.vt.edu/pub/mozillaseamonkey/releases/1.1.14/seamonkey-1.1.14.en-US.win32.installer.exe", _
"C:\Program Files\Warez-One Package Manager\Downloaded Packages\seamonkey-1.114.en-US.win32.installer.exe")
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Nov 10, 2010
Right now I upload a temp image file, delete the original, and then rename the temp to the original. Is there any way to rename without deleting first? I am doing this in a loop for a webcam program and when I delete the image, it shows a broken image if it is being veiwed right then. I wish I could allow it to overwrite when calling the rename. FYI, I have to upload a temp image first because if I upload the original, it will show as a broken image or partial at timed when being viewed.
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May 14, 2012
I'm with a big problem here. I have a 1.0.0 application that installs an Access Database into the user's machine. I have also a 1.0.1 version that needs to be released, and it has an new database file that i want to be installed overwriting the old file. Unfortunately, if the user does any update to the old file, the 1.0.1 version does not overwrite it anymore, and i did not find in any place how to force this file to be deleted or overwrited after being updated.
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Jun 27, 2011
I have a text file that needs to be uploaded to a ftp , however it needs to overwrite any existing file with that name.the filename will never change but data inside does, thats why we need to upload it to provide the most current data.filename = rawdata.txt..I have a basic form with a timer or button to send the file, I just need the code. In the mean time im messing with my last post code to see if there is a way to modify it to upload files but not having much luck.You Know Your Addicted To Computers When - Your main computer is a 7 terabyte, Core2Quad 3 Ghz +, with 4 or more gigs ram, over 200 programs installed, and you would rather sit with it programming than go to the movies!I've got 13 PC's in the House and 7 are in my bedroom and my main one exceeds this set of stats. Does anyone know a good psychologist?
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Feb 10, 2009
I'm trying to save an excel file:
vb.net
xlWBook.SaveAs("J:DOWNLOADS.xls")
xlWBook.Close()
xlApp.Quit()
If the file already exists excel will open an message box and ask if you want to overwrite. If I click yes, it works. If I click no or cancel, I get an error:
Exception from HRESULT: 0x800A03EC
How can I tell what button the user clicked?
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Sep 21, 2011
I have a number of word documents I am converting. Everything is going great until I get a file that is read only. In this case I get a Save As prompt.
Is there any way to open the file in read/write format? I should have admin privileges so access isn't an issue.
I'm using VB.net to open the files. More specifically
doc = word.Documents.Open(path, Type.Missing, False, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing)
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Jun 28, 2010
I cant seem to figure out how to add text to a text file without overitting all of it. I am using:
Code:
File.WriteAllText
I guess I could read it, copy, and then write it all over. Is there a way to just add text to the end of the current text of a text file?
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