Open Excel File And Reusing Existing Excel Instance?

Jul 13, 2010

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.


IDE :: Open An Existing Excel Workbook From A Form?

Dec 5, 2009

I have successfully created a new excel with the code

[xlApp = New Excel.ApplicationClass]

and can transfer and manipulate data from my VB2008 form back and forth with the spreadsheet One time only each time I try and add additional data it wants to open a new workbook with the same name but cant seem to get it to just add the additional info.

View 1 Replies View Related

Took Oledbconnection With Excel File But Unable To Open That Excel Manually?

Mar 10, 2009

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 Replies View Related

Open An Existing Excel (.xlsx) Spreadsheet Into MemoryStream?

Apr 23, 2010

I want to know how to open an existing Excel Spreadsheet into a MemoryStream to that I can write to the Response object.

Dim ms As MemoryStream = CreateBasicWorkbook(True)
Dim FileName = "\Ihe-webprod1tvinjurytrackingdocuments$ExcelSpreadsheetsHours.xlsx"

I need the code to get File the xlsx file to a memory string



View 8 Replies View Related

Open An Existing Excel Workbook Code Mods?

May 30, 2009

I have questions on this [FAQ's: OD] How do I open an existing Excel Workbook? I have playing around with the code little. Trying to mod the code to display the selected path and File name in the textbox I have on a form. I can to get it to work right

View 1 Replies View Related

How To Open A File In Existing Program Instead Of A New Instance

Mar 17, 2009

I have a program that runs some data manipulation on a file when it is double-clicked and then displays this to the user.However, when I double click on the same file type of a different file it opens in a separate instance of my program instead of the same instance already running, i.e. some message that says would you like to reload file, YesNo, and then given the answer perform the action required.I have found some code to stop a second instance from opening, but this is inconvienient for the user to close out of the program everytime they want to view a new file.[code]

View 6 Replies View Related

Export To Excel Excel Could Not Open The File Because The File Format Is Not Valid?

May 8, 2012

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

View 2 Replies View Related

IDE :: Open Existing Excel Workbook From A Form Created With VB2008

Dec 4, 2009

here is a copy of my current code.  Am trying to open an existing Excel spreadsheet then retrieve the old balance data refigure the new balance and store new data into the spreadsheet. Am I on the right tracK, or way out in left field?

"Checkbook.xlsx") Nothing


View 1 Replies View Related

C# - Excel Interop Quitting The Excel Application Instance Makes Tests Fail?

Feb 23, 2011

I want to encapsulate the use of Excel Interop to make it easier to use somehow in a reuseable library.So far, I have written some tests that work good altogether, except that between each test, I force Excel to quite so that it does have handle on the test file no more in order to be able to delete.Once I quit the application instance between after each of my tests, Excel seems to be no longer responding, causing Windows to display "Excel has stopped working and is looking for a solution"

message. This message lasts a few seconds, meanwhile Excel is closing, causing the hang on the file to occur and my tests to throw an exception like "Cannot access file because it is being used by another process..."


View 2 Replies View Related

C# - OpenXML Add New Row To Existing Excel File?

Jul 12, 2011

I've got lots of XLSX files and I need to append a new row after the last one in the file. I'm using OpenXML and so far I know how to open/create spreadsheet, but my search for adding new rows to existing files returned nothing.

View 1 Replies View Related

How To Add Data To An Existing Excel File?

Jan 13, 2011

Please see the code below:

Dim objExcel As New Excel.Application
Dim objWorkbook As Excel.Workbook
Dim objSheet As Excel.Worksheet


View 5 Replies View Related

Adding To Existing Excel File From Datagridview?

Oct 17, 2010

I'm trying to figure out what would be the easier method for what I'm trying to accomplish. What I have is in, on the main form, a datagridview that is bound to an xls file. I then have another form that the user can import/paste data to another dgv. This content then needs to be appended to the end of the main form's dgv. Would it be easier to add it straight to the dgv and then save it to the excel file or save it to the excel file and reload the dgv? Or does it matter? I'm not exactly sure how to do either method but I figured I would start here.

View 1 Replies View Related

Insert Blank Row Into Existing Excel File?

Apr 1, 2011

how to insert a row into an excel file via

I am familiar on how to do this inside the spreadsheet using vba - but not certain how to accomplish this within vb.Net.

View 4 Replies View Related

Load File From Excel If It Has An Existing Cell

Apr 23, 2012

the following is a working button to load excel data into a listbox. When I first wrote it I just used a loop to pull items 1-10 to do testing. Then sufficiently forgot about it and remembered just now. So in short here's the button:


View 1 Replies View Related

Modify The Third Column Of An Existing Excel File?

Dec 18, 2009

I want to modify the third column of an existing excel file. The problem with below code is a new file is prduced with the new values in Column C and erases all other values in the orginal file. I want to update the orginal file with the new values.
Public oExcel As Excel.Application
Public oBook As Excel.Workbook
Public oSheet As Excel.Worksheet


View 4 Replies View Related

Writing Data To An Existing Excel File

Mar 16, 2010

I'm fairly new to coding in Visual Basic, and I'm working on a project where I have to allow users to write data to an existing Excel worksheet (by entering the data into a form created in Visual Basic.NET). I've created a form that allows users to enter data such as the following:


View 8 Replies View Related

Writing Data To An Existing Excel File?

Mar 15, 2010

I'm working on a project where I have to allow users to write data to an existing Excel worksheet (by entering the data into a form created in Visual Basic.NET). I've created a form that allows users to enter data such as the following:

Name (First, Last)
Mailing Address
Email Address

...and so on. I've programmed the data to be sent to the Excel file upon clicking on the Submit button in the form itself. I've also created the Excel file and placed it on my C: drive, but the problem I'm having is trying to send the data from the VB form to the Excel file itself. Can someone please show me some sample code or point me in the right direction as to how to get the submitted information from the form to save into the Excel file, please?

I'm trying to get the information to show up in rows and columns in Excel like the following below (the dashes are just to show that the information should be in rows and columns):

Name--------------------------Mailing Address-------Email Address-------Gender-------Age
John Doe---------------------2300 Jackson Street--------

View 4 Replies View Related

Adding A Rdlc Report To An Existing Excel File?

Jun 2, 2011

This may be a lengthy explaination, but I am hoping to make myself clear.I have an existing Excel file that is created using the following code:

Dim warnings() As Microsoft.Reporting.WinForms.Warning = Nothing
Dim streamids() As String = Nothing
Dim mimeType As String = Nothing


View 1 Replies View Related

Export Data From Gridview To An Existing Excel File?

Apr 7, 2012

I need to save the results of each search that I run on my database, into an excel file. So it is an iterative process where the new search results are added on as new rows to the excel file in each export. I am running the following code which works perfectly fine but for the fact that each export is saved to a newly created excel file.[code]...

View 1 Replies View Related

Close Excel Instance After Creating .xls File In VB

Oct 28, 2009

I am creating an excel file in my vb app. Below is the code I am using to do this. But when the application is closed, I still have an instance of Excel running in the background. How do i close it? I can do it with the xlWBook but not the xlApp.

'create empty excel file
xlApp = CType(CreateObject("Excel.Application"), Microsoft.Office.Interop.Excel.Application)


View 8 Replies View Related

Export A Datagridview To Excel And Open The Excel Spreadsheet (not SAVE The Worksheet)?

Jan 10, 2012

I'm trying to export a datagridview to Excel and open the Excel spreadsheet (not SAVE the worksheet).

Public Sub ExcelRpt(ByVal DgvName As GridView, ByVal url As String)
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet


View 1 Replies View Related

Import Single Column Excel File To Existing SQL Server Table?

Dec 15, 2009

i need to import a Single Column Excel File to an Existing SQl Server Table.

View 1 Replies View Related

App That Opens Excel Visible Then Another Button_click That Writes To The Same Open Excel

May 11, 2012

I have a VB.Net App that on ButtonRun_Click open Excel to get the "tab" and "column" then another buton that past content from textboxes.  I get a "COMException was Unhandled"  If I reopen excel it's in use.  

Private Sub ButtonRun_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonRun.Click
Dim MyExcel As New Excel.Application


View 3 Replies View Related

[2005] Can't Open Excel File By Using XlApp.Workbooks.Open?

Feb 11, 2009

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


View 1 Replies View Related

Cannot Open Excel File

Nov 26, 2010

I 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 Replies View Related

How To Open Excel File

Nov 4, 2009

i 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 Replies View Related

Open An Excel File?

Aug 10, 2010

I want to open a excel file, and then close my projekt:

so when the projekt is close  the excel is open with a file.

View 2 Replies View Related

Open Excel's File From Vb?

Jan 24, 2011

how open excel's file from vb

View 5 Replies View Related

Assign Value Without Open Excel File?

Jan 25, 2011


how can I assign value to wb witout open the file (I want another function to give wb value without open the file)

View 1 Replies View Related

Best Or Better Method To Open Excel File

Jun 2, 2011

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 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

View 4 Replies View Related

Declare / Open Excel File?

Aug 24, 2011

I've been trying for a while to declare or to open a excel sheet in I already read excel file in and other links but it doesn't work. I added Microsoft Excel 12.0 Object Library. I included:


View 2 Replies View Related

How To Open Excel File With 2005

Jun 4, 2010

On my computer I've 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


View 1 Replies View Related

Open An Excel File With Arguments From .net?

Feb 16, 2009

I am working on a 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


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?

View 2 Replies View Related

Open Excel File From The Same Folder?

Nov 26, 2011

I'm using 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
as when did in Process.Start("Name.xlsx")

View 2 Replies View Related

Open Excel File In Program?

Apr 24, 2007

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 form, on button click. I prefer to open that excel in 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)

View 6 Replies View Related

Open File In Excel Then Save It As Csv

Apr 20, 2010

I have a database file that excel reads just fine but i can't figure out what type of file it is. So i figure the easiest thing to do is open the file in via an excel object, then execute the save as i have seen 1000 examples but even after i think i add a reference vb still has no idea what "excel." is.[code]

View 1 Replies View Related

Read From An Excel File That Is Already Open?

Jun 6, 2011

I want to rewad values from an Excel file that is always open and updating. I was using standard code to open up Excel and read from it, which worked fine, but that opens a new instance of the sheet. I need to read from a sheet that's already open.

I'm using xlWorkBook = xlApp.Workbooks.Open("c:\example.xls") which opens a new instanc of example.xls.

If example.xls is already open, is there a way of reading from it?

View 3 Replies View Related

.net - When Importing Data From Excel To File Open

Mar 6, 2010

When importing data from excel to desktop application, Im having "file is open" error. Excel file is at the remote pc. Excel file must open and I have to reach anytime. How can I handle this problem?

View 2 Replies View Related

Check If Excel File Is Open By Other User

Mar 31, 2010

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 Replies View Related

Excel - Open A File In An Active Workbook?

Aug 19, 2010

I have a program that filters data and then outputs it to a tabg delimited file. I then use Excel Interop to open this file in Excel because directly outputting to a worksheet takes too long. So currently I am using this code:

Dim WB As Workbook = ExcelApp.Workbooks.Open(AD.DF.DatafileInfo.WriteToFileLocation)
ExcelApp.Visible = True

The first line takes the filtered data and outputs to a tab delimited file. The second opens that same file in a new workbook in Excel. And obviously the third makes Excel visible. Here is my problem though: right now when this code is run there are two open workbooks. I already have an active workbook and I would just like to open this file to that workbook.

View 2 Replies View Related

Copyrights 2005-15, All rights reserved