I have a excel file place on server. I am using a application which written by VB.NET to open file in read only mode. User 1 open file in read only mode. How can user 2 detect that file is open or not status?
View 2 RepliesMy 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.
View 7 RepliesThis is a simple fragment of my code:
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The last line throws an exception "Cannot open file" with certain end-user profiles. It works perfectly fine when executing from an Admin account. I just cannot figure out what user privileges and access settings may cause the error. Note that it also works with some end-user accounts (not admins). What missing user rights can cause this?
I have this issue that occurs with me and driving me crazy i have a report that contains thousands of records and i need to export it to excel , but the excel normal extension .xls
is showing missing records at the end of the file , so i save my file as an .xlsx extension it saves correctly but when i open the file it generates an error
"Excel cannot open the file '<var>filename</var>.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file."but when i test the file i drag it and open it in an empty notepad all the records shows up correctly
I would like to open the excel file after create the excel file. The creating file function is done, but the system unable to open the excel file. My coding as below:
Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim misValue As Object = System.Reflection.Missing.Value
[code]....
I have an application the contains several excel files bundled with it. I'm not opening the files and processing them within my application. These files contain a data-connection to reload all of the pivot-tables within each excel file. I have a 'link' on my form, that when clicked, it determines which file to open and calls a sub using filename and executing Process.Start(filename) for any excel file I want to open. I have no problems opening any one of the files and then exiting excel.
The problem is when I 'close' a file, but don't exit Excel; then try to open another file(clicking link on form)... it creates a new instance of Excel.
I know from experimenting that the fileopendialog form will 'reuse' an existing Excel instance, IF it does not already have a file open.
How can I do the same thing without using the fileopendialog?
I don't want the end-user to have access to the folders where these files live. That's why I have multiple 'links' on my form, one for each xls that already exists. I just want them to be able to click on a link and the xls file opens AND if they choose to merely 'close' a file and not exit... Don't create a new instance of Excel, but re-use the existing one.
I took oledbconnection with excel file, after disposing this connection i m still unable to open that excel manually,It shows some access error.
View 1 RepliesI've gone through about 16 hours and two packs of cigarettes trying to figure this out. First a little background. I was using 6.0 up until 2004 when I went to prison. I'm out now, and trying to relearn the trade, using VS 2005. I'm currently porting some 6.0 code from another project, SpyCast Webcam Studio, into VB 8.0. It's disheartening, to say the least. None of the old built-in subs/functions work anymore, so I have to scour the forums to relearn each and every function.The section I'm doing now takes a snapshot from the webcam (Video API --> PictureBox --> Save as Jpeg), then upens the file to upload it to the server via HTTP POST. I've been using this code in SpyCast for years with no trouble, but I spent many hours trying to piece together the right code to open the binary file to read its contents. I pieced together two methods I found around the forums, one using FileStream() though the code I found wasn't for binary files, even though it said it was, so that code doesn't really work. Method two uses Microsoft.VisualBasic.FileOpen() and works better.
Here's the kicker. By the time I run through the rest of the rigamarole of uploading the file, by the time I read it on the webserver, it's *slightly* corrupted. It's a valid Jpeg, no errors, but the picture looks like when I use to watch the Playboy Channel when I was a kid scrambled with weird colors and whatnot. [code] Each "chunk" is basically one "line" of the file. It looks like a single LineInput() return is the text between two carriage returns. Am I correct? I tested this with a flat text file, and it looks true. However, That one input line returns the text or data with the carriage returns *stripped*! ***?!? =( Fine, I have no problem adding my own vbCrLf to each LineInput(), if I were opening text. but this's binary. A character could be Chr(10) or Chr(13), both of which are removed from the original file contents.So I could very well need to use something other than LineInput(), but I haven't found any other examples on the web using this method.
The following code works to check if a file exist, but I need to also check if the file is open. How would I do that?
[Code]...
I need to open an excel file from vb.net and then search it for specific data. I then need to take those data and insert them into text boxes on a form that i have created. This is all controlled by a button click. I already have some code that will open a file dialog box and let me navigate to the correct file, but I am having trouble with the search portion. I have tried the Find function but I am not sure of the proper syntax. I am using Visual Studio 2008 and Excel 2003.
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Supposedly I create a file called "hi.txt" and I use Process.Start(filename) to open it. then I File.Opentext(filename), edit it and close it using stream writer/reader, while I still have that file open.
In order to see the changed text I need to close "hi.txt" and reopen it.
Is there a way to automatically do that? Been experimenting a bit but with no luck.
I have a filesystemwatcher that watches a certain folder.. Now i use system.thread.sleep to be sure that the file is completely copied to the folder that i watch..But this is not a good way!i know there is a way to check if the file is open or used by another process, but i dont know the code.[code]
View 2 RepliesI have a filesystemwatcher that watches a certain folder.. Now i use system.thread.sleep to be sure that the file is completely copied to the folder that i watch..[code]....
View 10 Replieswould it be possible to check if any notepad or word file is open that contains the word 'test'?I was thinking something like the following.
Dim Process() As Process = System.Diagnostics.Process.GetProcessesByName("notepad")
Dim Process2() As Process = System.Diagnostics.Process.GetProcessesByName("word")
For Each p As Process In Process
If p.MainWindowTitle.Contains("test") Then
[code]....
The following code works to check if a file exist, but I need to also check if the file is open.How would I do that?
If System.IO.File.Exists(Application.StartupPath & "players.txt") = False Or System.IO.File.Exists(Application.StartupPath & "preferences.txt") = False Then
bla bla bla
End if
When the main program is doing it's routine, it is looking at, and using, data from the two files.So, when the user pauses the program by opening the control panel, one or both of the files may still be opened. When the control panel tries to open them, it causes an error.(I am guessing that to just tell it to close them will cause the same problem if they are already closed.)
A user exported a excel file and he opened it.Some reason, he tried to export same exel file as same name.Then, the application is gone because it does not know what do with it.How do I check the excel file is opned or not when I try to export as same file name again?
View 2 RepliesI have written an access application for project management and am trying to convert it to VB so i can make an exe. what i need to do is open an excel file because my gnatt chart creator is an excel document.When i run my debugger it says it doesn;t know what the open command is..I think i need to include a reference but do not know which one and there are lots to choose from. i have included the excel reference so the compiler knows what an Excel.Application is and what Application.Workbooks is. but when i try and go beyond work book i get no options like open or save or saveas or worksheets.[code]
View 1 Repliesi want to open an excel file inside my folder which is dynamic meaning it can be in drive c: or d: as long as it is inside a specific folder grace
View 4 RepliesI want to open a excel file, and then close my projekt:
so when the projekt is close the excel is open with a file.
how open excel's file from vb
View 5 RepliesI am trying to save the text file in this path:"C:Test est.txt" and when the file is already opened I need to check whether the file is opened and I need to close it before writing it to the file.[code]...
View 3 RepliesI have a filesystemwatcher that watches a certain folder.. Now i use system.thread.sleep to be sure that the file is completely copied to the folder that i watch..But this is not a good way!
I know there is a way to check if the file is open or used by another process, but i dont know the code..
[Code]....
The following gives me an error when I try to open an Excel file if the value of lblFileName is different than the file on disk by differences of upper or lowercase letters.
[code]...
[code]...
how can I assign value to wb witout open the file (I want another function to give wb value without open the file)
Im struggling on how to open an excel workbook without one of two problems.
1. After the first workbook is opened and I close the workbook, if another is opened the worksheet area is "transparent", as in, you can see the desktop or any open app behind excel.
2. Closing excel and opening another workbook after X times (4+?) via the vb.net app I use causes the computer to reboot.
I am stuck thinking it is the method used to open excel within the app.The code below has two methods, both produce the same affect. One method is blocked (makes it easy to test either one).[code]I have two buttons that open workbooks, both have identical code less the workbook requirements.Is there a better or best method to use for opening excel workbooks from vb.net?
I've been trying for a while to declare or to open a excel sheet in vb.net. I already read excel file in vb.net and other links but it doesn't work. I added Microsoft Excel 12.0 Object Library. I included:
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On my computer I've VB.net 2005. and also office 2007. I try to open an excel file like that
Imports Excel = Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
I am working on a VB.net program that must get data from excel workbooks. I open the excel workbook, copy a chart image tp the clipboard, then copy the contents of the clipboard to a PictureBox.Image. The problem I am having is the files contain links to other workbooks so when I open them I get a message box asking if I want to update the links. Since this is ment to run automaticaly at certain times I will not be there to click on Yes or No.I also have a similar problem when I try to close the workbook. I get the messagebox for saving changes to the file.Here is the code I am using:
Dim objXLS As Object = CreateObject("Excel.Application")
Dim FileName, Sheet As String
Dim data As IDataObject
[code]....
objXLS.ActiveWorkbook.Close()'This is where I get the file save changes message boxI am using Visual Studio 2008 Pro and excel 2003My operating system is XP?
I'm using vb.net 2008 I want to use this code to open Excel file from the same folder where the program(exe) will be.
Dim exl As New Excel.Application
exl.Workbooks.Open("Name.xlsx")
as when did in Process.Start("Name.xlsx")
I have an excel file,having lot or micros, connecting to database, doing some complex calculation..inshot that excel file is itself an application.
Now I want to open that excel in VB.net form, on button click. I prefer to open that excel in vb.net form itself having all the excel tool bar etc, If that is not possible then opening in separate window using excel will also solve my purpose (coz when we open in excel it self we will get all the toolbar option etc automatically)