Read From An Excel File In Program When It Is Not Open?

May 4, 2012

I have a vb program that reads data from an excel sheet and displays it in a datagridview. The problem with this program is that it is able to read the data and display it only when the excel file is opened but when the excel file is not opened, it gives an error report that[code]...

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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?

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Open - Edit - Read Excel File Columns?

Sep 23, 2009

How do I open, edit, read excel columns in vb.net? Like, for example, I want to know the values of column B up to the cell that it contains values.

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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 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)

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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

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Read Data From Excel But Can Open Exel In Normal Windows?

Mar 31, 2010

I want read data from excel file and it's done.but I've problem about excel that open from program. I cant edit or open that file from ms Office.sample:I have masterCode.xls in my local drive. with vb i open that file, read data and bind into gridview.it's work. after close program, i open masterCode.xls with ms Office, that file opened but it automatically closed.when i open vb and run program again, select the same file, read data but now its error ("File is used").

Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
Dim objExcel As Excel.Application
Dim objWorkBook As Excel.Workbook

[code]....

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[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

[code]....

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C# - Open A Read Only File As Non Read Only And Save/overwrite?

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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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.

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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.

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VS 2008 : Use Code To Read Excel File With Excel Installed?

Feb 7, 2012

I am uploading an excel file to my app and want to read it. Do I need to have excel loaded to read this?I am getting an error of Object reference not set to an instance of an object.

Public Function GetExcelData(ByVal ExcelFilePath As String) As DataTable
Try
Dim OledbConnectionString As String = String.Empty

[code]....

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DB/Reporting :: Read Excel File Without Excel Installed Using VB?

Feb 27, 2012

I tried to read excel file using the method i found here [URL] But i get an error on ADODB.Connection saying "Type 'ADODB.Connection' is not defined" in the following code:

Code:
Private Function GetExcelConnection(ByVal Path As String, _
Optional ByVal Headers As Boolean = True) As Connection
Dim strConn As String

[Code]....

Its was used in VB6... do i need to do something special in Visual Studio 2010?

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VS 2008 Read Process Memory From An Open Program?

Dec 27, 2009

I want to be able to read and write the process memory of Firefox for a game on facebook(It's kind of like cheating only you can't cheat, nothing stays permanent.) this is just for fun. The game is called happy fish aquarium and you raise fish in the game and it's just really addicting. I found a program that reads process memory and lets me change certain values in happy fish aquarium so I can make my fish tank look different or whatever. But if I reload the page it will of course go back to the original state because the fish tank's memory is held online. The point is, I just want to make a program that can read the process memory from Firefox from a certain range and bytes. like 4 bytes and a range of 00400000 to 7FFFFFFF. Does anyone know how I can achieve this? Please note, this is not for cheating purposes in any way whatsoever, it's simply for visual fun(visual meaning only I can see it). What I want to do is the same as using the add-on firebug in firefox to change the html on a webpage.

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File I/O And Registry :: Open / Read Binary File / Care To Check Code?

Jun 14, 2009

I'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.

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Opening An Excel 2003 File Then Searching That Open File For Data

May 22, 2012

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.

[Code]...

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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]

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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

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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.

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Open Excel's File From Vb?

Jan 24, 2011

how open excel's file from vb

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VS 2010 Open Through And Read File?

Mar 16, 2012

My question is a rather simple one and to be honest with you, I am not sure if it can be done. Lets say I have a mutli-line text box, is it possible, and if so how would I go about making it so if I clicked Open with > editor I could do things with this text, such as TextBox.text = [file contents]. If it's not possible just let me know and I'll stick with open file dialogs.

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Cannot Read From Excel File

Mar 6, 2012

I have excel 2007 installed on my laptop. I have vb.net 2010. I have tried a dozen different pieces of same code and I cannot read from an excel file...

Imports Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Form1_Load( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
[Code] .....

Warning1Namespace or type specified in the Imports 'Microsoft.Office.Interop.Excel' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.C:UsersksimonsAppDataLocalTemporary ProjectsWindowsApplication3Form1.vb19WindowsApplication3

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How To Read From An Excel File

May 1, 2009

I am trying to read from an excel file. so far this is what i have:

Public Class testclass
Private wrkbk As Excel.Workbook
Private sht As Excel.Sheets

[code]....

The debugger gets to the "sht = wrkbk.worksheets(1)" line then says its has error: Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND))

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Last Row In Excel File Is Not Read Via .NET 2.0?

Jul 28, 2009

I have a program that I wrote that uses a system generated excel file from a remote system.

[Code]...

The issue I'm having is when I query the system generated excel file, it is not returning the last row. If I open the file in Excel and then save it, It returns all the rows. Since Windows 2008 64bit does not allow control via Excel to the file, I have to query the file via Jet provider or Odbc provider. I have tried using the Jet provider and the odbc provider.How do I get all the return all the rows with the system generation file?

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Open An Excel File If The Value Of LblFileName Is Different Than The File On Disk?

Mar 29, 2012

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]...

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VB To Read Text File And Execute An Excel File?

May 20, 2011

I need to write VB program to open and read text file, store each field (separated by comma) into an array. In the first array, it's an excel file and I need to execute it, and once opened in excel, there is a macro program inside and i need also to exceute using VB.

sample content of textfile:

C:principalsinventory.xls, MacroInventoryReport, 1, 3:00AM
----------
C:principalsinventory.xls, MacroNearExpiringReport, 1, 4:00AM

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VS 2008 - .txt File - Write The File Path So That Someone Else Can Download My Program And File And Read The File

Feb 27, 2012

Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.

This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"

I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?

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Assign Value Without Open Excel File?

Jan 25, 2011

[code]...

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

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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 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?

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Declare / Open Excel File?

Aug 24, 2011

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:

[Code]...

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How To Open Excel File With 2005

Jun 4, 2010

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].....

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