How To Tell If Certain Excel File Is Opened
May 26, 2010
I'm exporting my Dataset to an excel file, and I want to make sure I keep any file errors under control. One in particular that I'm concerned about is accessing a file that's already open. A general IOException occurs that says:
"The process cannot access the file 'C:Reports eport300.csv' because it is being used by another process."
Here is the line in which the error will occur:
Dim output As New IO.StreamWriter(path, False, UnicodeEncoding.Default)
I guess I could just throw a try catch around it, but what if an IOException happens that isnt related to this particular incident? Is there a way I can check to see if the file is already open before allowing this code to run? Especially when I'm using excel.
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Aug 3, 2009
I use the following code snippet
Dim exlapp As New Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook_new As Microsoft.Office.Interop.Excel.Workbook
Dim strOriginal As String
strOriginal = Server.MapPath(Request.ApplicationPath & "/Attachments/") & "abc.xls"
xlWorkBook_new = exlapp.Workbooks.Open(strOriginal)
The code hangs in the last line. It works fine in the development environment. i deployed in windows server 2000 ,where I get this issue. the browser goes half way and throws the below exception after some time
[Code]...
I have set the identity impersonate to true in web config. This should be mostly an access rights issue.I have even provided access rights for the "everyone " user in the excel file and as well for the interop component. Please post ur valuable comments.
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Apr 26, 2012
My program opens 4 excel spreadsheets updating info. I update one at a time and then close it before opening the next one.I want to add code to my program to test if the file is already open, before trying to open it. Occasionally someone will have one of the files opened and it causes a crash. If I test to ensure it is not open, then I can avoid this.
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Aug 25, 2009
I using Microsof Visual Basic 2008 Express Edition. I need to create a form like: 2 buttons are open and save existing .xls file which each generation can choose a different.2 textbox that can be entered on the column
and last button to when choose two columns, to find duplicates values and mark different color same values. Is it possible?
At the moment Excel file opens, but the comparison does not require the introduction of the columns
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Jan 14, 2011
I have the code below:
Dim i As Integer
Dim objExcel As New Excel.Application
Dim objWorkbook As Excel.Workbook
objExcel.Workbooks.Add()
[code]....
At the end of this routine, eventhough the data was correctly saved to my Data.xlsx file, this routine also opened 15 EXCEL.EXE tasks in task manager.I thought that I had cleaned up before quitting. By the way, whether I write to 1 or 5 or 10 cells in Data.xlsx, 15 EXCEL.EXE tasks would be opened regardless.Is there a way to (easily and) completely close all EXCEL.EXE in task manager before leaving my application?
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Mar 7, 2011
The problem I have is that I have a 3rd party add-in working in excel to convert certain info into a barcode.
When I open excel normally, the add in works without a problem, but when I open it through excel it just doesnt work until I manually go into the add-in option, disable the add-in and the reenable it.
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Sep 28, 2009
I need some code which checks if excel is open or not, if excel is not open then opens it (that code is fine)
else try to write some content/cellvalues to the already opened excel, basically I am creating windows application, which has been scheduled to run numbers of time in a day, when ever application executed, the application has something to write to the excel. one more thing is i don't want excel to save and close every time i execute the application, Its like transparent processing of EXCEL writing, a file is already opened, just write some content, and after writing it exit the application without either closing or saving the excel
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Apr 28, 2009
I need code to save the opened excel book (save as) and close it.
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Apr 28, 2009
I want to save the opened excel book and close it. My code is given below but i found errors in that code .
xlBook.SaveAs (strTargetFile)
xlBook.Saved = True
xlBook.Close
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Jun 21, 2010
What I wanted to do is close all opened workbooks. This code does the work IF there is at least one or more opened workbooks. My problem is IF there is NO opened workbook at all; It goes around unendlessly in the WHILE Loop. How do I not process the closing IF there is no any opened workbook at all? (NOTE: I found this code from somewhere else.)
[Code]...
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May 4, 2012
I will know how do I work with the opened excel instance, when I use multiple userforms. I have on my form1_load open a excel file. Then I observed that on my next userform, was unable to write to that file again. Project have no instance of APP.workbook.
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Feb 15, 2011
I developing an application that downloads some reports from a external ASP web app. I use the control webbrowser to navigate through the pages, generates and download the reports. The URL are in an array ArrURL and I have 2 situacions:[code]
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Aug 24, 2009
I need to:
1) Read a CSV file,
2) Put the data in a list object that I can sort,
3) and populate a few GridView controls on a form,
4) Write my sorted list to an excel file, which I've never done.
I'd like to create a formatted summary table that would look organized when opened in Excel. Who is best person/ or place to ask about that?
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Oct 25, 2009
I want my program to be able to create a '.txt' file when it is run for the first time, with the date and time the program was accessed, and to be able to add new 'logs' of program history every time it is accessed. What i mean is that i want my program to be able to create a '.txt' file, and then fill in the dates and times when the program is opened.
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Jun 5, 2009
Is there a better way of finding the path of a file that was opened with the open file dialogue? This is what I did. It works, but it seems like there should be a way to get the path through one of the open dialogue options.
Code:
'm_PicSource = OpenFileDialog1.FileName
'm_PicSource is a global var
Dim strCnt As Integer = m_PicSource.Length - 1
[Code].....
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Jan 10, 2010
So I open files and do whatever with them right. I've set the initial directory to equal the last directory, but whenever I open multiple files, it never sets the directories properly. It acts as though nothing was opened there, so it takes the previous directory as the last one. Thoughts on what's not working? Here's the code.
Code:
With FileOpenDialog1
.InitialDirectory = LastDirectory
If .ShowDialog = DialogResult.OK Then
[code]....
I have multiselect enabled earlier and everything else works but this. When you open a single file, the last directory works fine. It only happens with multiselect.On another note, does anyone know why it freezes when I try to do a lot of files and use another program? I opened 700+ files to see what would happen. When I switched to a IM convo, it froze. When I left it to run, it worked.
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Feb 20, 2010
I can't connect to my database now, although yesterday it was perfectly fine. An error message comes up saying "...A database with the same name exists, or specified file cannot be opened, or it is located on UNC share" this has never happened before. Why can't I access my database?
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Apr 24, 2009
I have created a windows application which creates a database file and saves it to disk, it uses a custom file extension so that when the file is clicked it opens the application. In order for the application to use the data in the file it needs to rename the file so that it has a .mdb extension. My problem is that I cannot see how to get the name of the file which opens the application.
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Mar 15, 2012
I made a quick search program so when I browse for a text file, it adds that text file to a listbox1. And then when you search result will be placed in listbox2 Now I'm wondering how to force the program to automaticly load last opened text file on startup.I tried with this and then I stuck.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim reader As IO.StreamReader = _
New IO.StreamReader(winDir & "system.ini")
[code].....
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Feb 29, 2012
How can I upload an image 1.png into the program and then once the program is opened, that image gets saved here:LibrariesDocumentsand if there is already a file called 1.png in that directory.
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Feb 19, 2009
I have the following code to open an Intel format hex file. The file is like this
:020000040000FA
:1000000000000000000000000000000000000000F0
:1000100000000000000000000000000000000000E0
:1000200000000000000000000000000000000000D0
[code]....
After I started running my code, I was told "Error opening file". Can anybody tell me what's wrong? Also how to retrieve each byte on each line to array HexValue?
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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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Nov 29, 2011
I tired this code to check if the Excel File is already open but didn't succeed
vb
Dim exl As New Excel.Application
If exl.Workbooks.Open("C: a1.xlsx") Then MsgBox("Yes")
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Mar 4, 2011
Can anyone point me in the right direction to where I can find information on how to make my own file type that can only be opened with my vb.net program that I'm am making? The file just needs to hold text.
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Nov 16, 2009
I have the following line of code used to input the name of a text file to be opened and during development this was working without a problem. However when I create an executable this is not working and I was hoping someone would be able to give me a tip on resolving this matter.
Dim fileName As String = Application.StartupPath & "" & TextBox1.Text
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May 15, 2010
I've created an application that saves files with an extension of "*.pbca". When i click the saved file in Windows Explorer, it opens my application, as it should, but i now need the code that finds the file path of this file once my application has loaded.[code]...
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Jan 17, 2010
I want to monitor for when a file is opened(movies that I open with a media player) and raise an event when that happens. I figure i've got 2 options: the first is monitoring the filesystem for a change in 'last accessed' property of the file- not good, since it doesn't change immediately. And second,monitor for when a process of the player is launched, and get the info from the titlebar. How can I do that ?
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Aug 30, 2009
How would I make it so that my programs Title is like"Text File Name"-"Program Name"Also, how would I make it so that text files can be opened with my program?I can open a text file within the program but I cant do
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Jul 15, 2011
I am trying to write text to a file in this path "C:\Test\test.txt" and when I want to save image filenames to this path I need to check if the file is opened and if it is opened I need to close the ".txt" file and write the text to the text file.[code]...
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Oct 21, 2011
I'm working through an example in a programming book and stumbling across a problem that I can't seem to figure out. The program in question is basically a very basic 'level viewer' for a tile based bitmap game (its a game creation book). The source code from the author was written for Visual Studio 2005, and I am using 2010. The source code imports fine and the program runs correctly.
I built the same program on my own, starting from scratch in VS2010. The program works like this: It opens a tile set palette (bitmap form), then uses an XML file to create a 'level'. The XML file indicates which tile goes where on the 'level'. The XML file is roughly 1.9MB and has roughly16,000 entries (the program creates a level that is 4096 x 4096 pixels using 32 x 32 pixel tiles).
Running and closing the program from source code runs exactly as expected. Running the program from my version runs exactly as expected. Closing it does not. It basically hangs up for about 2 minutes on close. (for reference every loads in about 3 seconds). I've determined that it is the XML file that is causing the problem by excluding the portion where it loads the XML. In that case it closes fine. If I cut it down to just a few records, my program closes fine as well. So it seems like the program is having trouble dumping the XML document at close.
I've tried to track down any differences between the source code and my code, and the only thing that I have found is that the References in mine are all using .NET version 4.0 and the references in the source are using mostly 2.0 and some 3.5 (System.Data.DataSetExtensions, System.XML.Ling.dll, and System.Core.dll)
The code for the entire form is:
Imports System.Xml
Public Class Form1
Public Structure tilemapStruct
[Code].....
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