File Still In Use After Close / Dispose Everything
May 12, 2009
I have created a CMS-system and I am using it on different homepages. To manage updates quick and easy I made a administration-system for uploading the updates on all homepages on the same time. As long as I only have to overwrite the old files everything is going fine, but there are some few files on every homepage containing some different constants.
For that purpose I made this code:
Open the new file to be copied from my default cms-system:
Dim fs as new FileStream("D:WEBLOCALUSERmysite.dkskabelondefault.aspx",FileMode.OpenOrCreate)
Dim objReader as new StreamReader(fs)
Dim strFile as string = objReader.ReadToEnd
objReader.close()
[Code] .....
Sometimes first file is updated successfully, but for the next file I got this error:'D:WEBLOCALUSERmysite.dkskabelonempdefault.aspx' because it is being used by another process. I tried to close and dispose everything possible, but still the file is in use for minutes.
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Apr 21, 2011
I used to always do the following:
con.close()
set con = nothing
Does con.Dispose() do both of the above 2 lines of code or do I do con.close() and then con.dispose()?
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Mar 20, 2011
whats the difference of Me.Close and Me.Dispose...What code does releases memory resources that was used by ".show" command?Im currently creating a program and i just used both of them... is that ok?if it is ok... i know some commands have issues on what should i type first.. so what will i type first?
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May 6, 2009
I am using VB.NET (Visual Studio 2008) and thus .Net framework 3.5. I have developed an application which has a MDI form and then has several other forms, most of which are shown using form.showdialog and some set of forms are shown using form.show.Whenenver a form (shown using form.showdialog) was closed (usually by clicking on a button (OK or Cancel)) I wrote code Me.dispose. After careful testing and R&D I figured this caused flickering on the screen. There use to be a flicker on the screen and it looked weird.In some rare circumstances if I clicked on button and form closed using me.dispose the focus of application was lost and some other program that was running came on focus. (This has happened but was rare.)Now the reason I used disposed was that after a form was shown using .showdialog I didnt want its contents to be in memory so I used the .dispose thing. But I noticed that If I use form.close then there is no flicker and form closes fine. But I think that would not dispose the form from the memory.
What should I do so that form closes and is disposes as well without any flicker.?I read on net that for forms shown using .show it gets disposed off automatically the moment it is closed (by using me.close) or user clicking on cross. Is this true? I also think that If I call a form using showdialog then I can write formx.dispose from where I am calling and not in the form itself.
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Mar 25, 2011
Is it always a good idea to use dispose prior to close? Or only under certain circumstances?
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Jun 2, 2010
In VB.NET when I am closing a form and no longer need to use it, do I do a me.Close() and me.Dispose()? Does the dispose erase the form from memory?
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May 6, 2009
I am using VB.NET (Visual Studio 2008) and thus .Net framework 3.5. I have developed an application which has a MDI form and then has several other forms, most of which are shown using form.showdialog and some set of forms are shown using form.show. Whenenver a form (shown using form.showdialog) was closed (usually by clicking on a button (OK or Cancel)) I wrote code Me.dispose. After careful testing and R&D I figured this caused flickering on the screen. There use to be a flicker on the screen and it looked weird.
[Code]....
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Oct 23, 2008
Is there a way to have a form within a program that doesn't dispose when you close it? I have a form in my project and a menu item to show it. When I declare the form globally and show in menuItem.click, then the click event breaks because the form no longer exists. When I declare the form within menuItem.click, then this creates a new form every time I click and that's not what I want.
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Jan 16, 2009
I'm currently in the process of building a text editor type program, and have run into a brick wall. I haven't done VB in years, so I may just need a little reminder on some things. I have coded everything so far as far as opening files, saving them, changing fonts, colors, etc. However, I'm looking to add a Close button to my menu strip that will just close the currently opened file, and not the entire program, while also ask the user if he/she would like to save before closing the file, and then if they select yes, it will show the save dialog, and if not, it will go ahead and close the currently opened item.
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Jun 25, 2012
I looked at the Dispose() method in System.Data.SqlClient.SqlTransaction (using a decompiler):
[Code]....
Why does everyone say in forums that it is Rolling back in the dispose? Where does it rollback?
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Oct 21, 2010
Which different abount Form1.Close and Form1.Dispose?
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Sep 12, 2011
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
Try
[code].....
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Oct 20, 2010
I'm getting some problems to read a text file with this configuration:
[Code]....
I want to put all 3 lines in a data grid view.
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Jun 14, 2009
I have an app that loads a jpg into a picyure box, then updates exif data in exifworks classThe problem is that when I save the image(from image used for picture box) or class (to save exif data) then try to delete, sometimes I get success, others it won't allow delet I have gone to the trouble of using gc.collect, do events, put the delete in a timer & wait for the delete before continuing & still get the problem
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Mar 3, 2009
How do I open a bmp file in VB.NET add a line then close the file?
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Feb 15, 2011
I have created a windows service that update a database(FOXPRO->MYSQL) every one hour. I fill the database from foxpro into a dataset and then write an xml file then load it to mysql database. It is a success every start of a service, the problem is every next run I am receiving an error --> The process cannot access the file 'D:\CivilStatus.xml' because it is being used by another process. To resolve this problem I stop the service and then restart again manually. What I want is the service will automatically run every an hour without restarting it manually. Here is the part of my code:
Dim XMLFilePath As String = "D:\CivilStatus.xml" 'Path of my xml document
If File.Exists(XMLFilePath) Then
My.Computer.FileSystem.DeleteFile("D:\CivilStatus.xml")
[code]....
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Mar 5, 2009
I am writing something to a excel file.So far so good. The only thing is the excel file is pop up.My question is how to make it invisible.I can open it directly from the hard drive when I want.
Public Sub WriteSpreadsheetFromArray(ByRef strOutputArray(,) As String, Optional ByVal strExcelFileOutPath As String = "")
Dim objxlOutApp As Excel.Application
Dim objxlOutWBook As Excel.Workbook[code]....
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Jun 4, 2011
I'm using visual studio 2010, and for my recent assignment i am having difficulty when closing a text file. My program is to read in the data from a text file and then do some calculations and then output the result.
[code]...
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Mar 21, 2011
In my code I have
IO.File.Create("C: ext.txt")
then I try to
IO.File.Delete("C: ext.txt")
How do I close the file that was created?
I have done something like this for writing to files but not creating files.
Dim infile As IO.StreamReader = IO.File.OpenText(path)
infile.close()
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Oct 9, 2010
Any code I could get that would Open + Close a .bat or .cmd file? Not ALL .bat / .cmd files that are open, but just ONE (runserver.bat / runserver.cmd).
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Jan 17, 2009
I have set up a notify icon for my form. I want to make it so that when the user clicks the close button that it doesn't close the form it just takes it to shows the notify icon. They can exit the program from the notify icon. Can someone tell me how to keep it running?
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Nov 29, 2009
It seems like whenever i click my close button the application will close but the debugger is still in active.How to exit this debugger? :)
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Mar 4, 2011
In a program I'm working on, I want a "Loading..." dialog to close when it can't log in to a site using the username and password provided by the user. Basically, I have the code set up right because the function it is supposed to carry out when that occurs does work, but for some reason it ends up in some really weird stuff happening. In the Loading form, I have it set to do "Form1.Show()" and then "Me.Close()", assuming it would simply show the login form and then close the Loading form. However, when this happens, the Loading form closes, and then for only an instant Form1 shows, and then the Loading form shows and Form1 closes. This happens forever until I stop the debugging, and I can't seem to figure out why. Am I using the wrong method? What exactly does Me.Close() do anyways? All I want to do is close the form and open another
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May 12, 2010
I have two Close() functions in same class as below:
[Code]...
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Mar 20, 2012
In this project I want to read text from the text file.. after that want to update the text file.. if i just run the code manually, the code run well.. but if I want use timer to keep the code run automatically there show problem.
here my code
Imports System.IO
Public Class Form1
Dim skrng As Date = Date.Now()
[code]....
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Mar 4, 2009
everytime i try to delete this file it says there is a connection open and it can't close. i think i've narrowed it down to my crystal report, but i can't get it close the connection.
[Code]...
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Jun 14, 2009
I want catch excel file close event
Like this :
if Xapp.exit = true then...
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Jul 24, 2010
I should mention that I'm mainly concerned with Random files.Which is the best method?
1.) Open file, manipulate data and immediatly close the file. (Which means doing this alot everytime data needs to be read, edited, deleted, or saved)
(2.) Open the file when the app starts and let it open for data manipulation until it's time to close the app at which time the file would be closed.
I was always taught option 1. The main reason at the time was to cut down on the chance for data corruption in the file or an outright loss of the file due to outside circumstances like power failure.
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Mar 26, 2012
I am trying to install a .inf file on form close. Here is my code
I get an error that says
Quote:
Object variable or With block variable not set.
[Code].....
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Jun 9, 2011
I am having issues with people not closing an important file in excel.I have a new vb.net based application that i want to close the excel file when i prompt it to. The application checks for specific named files in a hidden folder on a timer event, (that all works fine) how do i tell it to close a file that is already open.All threads i have read say things like this:
Dim XLApp As New Application
Dim WkBook As Workbook = XLApp.Workbooks.Open("C:Book1.xls")
Dim Sheet As Worksheet = CType(WkBook.Sheets(1), Worksheet)
[code]....
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