Open Excel Workbook On Client Machine With Web Application?

Sep 29, 2009

I'm writing a VB.NET WEB application and I'm fairly new at it. What I want to do is open Excel workbooks on the client workstation so the user can "Save As" or print or basically do whatever they want with it past that point. I've done this in a windows application using System.Diagnostics but all the information I've read so far doesn't seem to work. I can open .txt and .xls files using this approach:[code]but it opens in the browser, which is not what I want. Do I need to mix Javascript with the HTML and the VB code?


Set The Value To An Already Open Excel Workbook?

Jun 15, 2011

I am working with an application, which stores and manipulates data in Excel. have successfully imported the necessary Excel libraries viaImports Excel = Microsoft.Office.Interop.Excel

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Mar 4, 2012

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For example, try to open the website in excel for 45 seconds. If still not open, skip and move to next line of code.

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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.

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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.

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Aug 8, 2010

I am finally switching from VB6 to VB Net and am rewriting a technical application that calculates the heat transfer performance of automotive radiators, heater cores, evaporators, condensers, etc.The user can calculate a heat exchanger and save the results to an Excel spreadsheet. After a series of calculations he can then plot curves of performance.

He can also click on a previous calculation in Excel and import it into the VB routine. The user may have a number of workbooks open when he does this.My problem is I need to open the Excel workbook that is the active workbook. I have been able to select the active worksheet but have been forced to specify the index of the workbook. I have not been able to get the workbook I want.. The code I used is the following,

Dim oExcel As Object = GetObject(, "Excel.Application")
Dim oBook As Object = oExcel.Workbooks(1)
Dim oSheet As Object = oBook.activesheet

How do I get the active workbook instead of Workbooks(1) with an index of 1?

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NullReferenceException Was Unhandled Trying To Open A Workbook In Excel 2003?

Jul 19, 2010

I am trying to transfer data from a VB form to an existing Excel 2003 file. This is the code I am using, but it is throwing up the following error:I have coded in VBA but am new to VB.NET and am struggling with setting up the objects

Dim oXL As Excel.Application
Dim oWB As Excel.Workbook
Dim oSheet As Excel.Worksheet


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May 30, 2009

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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


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Jun 9, 2011

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An Excel Workbook's Sheet Tabs Be Sorted Within The Workbook?

Jan 6, 2011

In building an Excel workbook with VB.Net, is it possible to sort all the worksheet tabs into a particular order? I'm building a workbook with individual sheets named by drive letter, i.e., "C Drive", "D Drive", etc.

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Create 3.5 Web Form Application Derived From Excel Workbook

Sep 8, 2009

A customer has provided me with a spreadsheet file his team uses to provide quotes for a product. The spreadsheet has extensive data in underlying sheets and calls those sheets as part of the numerous formulas on the quote sheet.

I've been tasked with web-enabling this tool such that the quotes can be generated on the client's website, hosted in a shared environment, running 3.5 webforms. The quote web form will be in a Restricted portion of the website controlled by membership API.

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Oct 10, 2009

Create 3.5 web form application derived from Excel Workbook

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Dec 15, 2011

I need to know how to run an application on client machines from a Central location for example from an application server?

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Jun 28, 2010

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Dec 9, 2010

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Jun 29, 2010

I have an application that takes a series of reports and sends them as attachments in an email to a specified group of email accounts.

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I have a VB.NET web application running on a server that uses similar code. I tried that code locally and it fails. Yet, the web application is working perfectly.

Why is it that the Java application can send the email, but the .NET application cannot?[code]....

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Aug 20, 2009

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Aug 3, 2009

I use the following code snippet

Dim exlapp As New Microsoft.Office.Interop.Excel.Application
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Dim strOriginal As String
strOriginal = Server.MapPath(Request.ApplicationPath & "/Attachments/") & "abc.xls"
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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


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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Client Needs To Have Sql Server On His Machine If Application Uses Sql Server?

Jul 16, 2009

I am creating small application (desktop search engine) which uses sql server as back end. Sql server is used to store huge data using indexing (for quick search). Is it necessary that client should have sql server on his machine to run the application? I don't want to install sql server on client's machine, because my application is just a small utility.Is there any other way so that I can store huge data using indexing?

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Merge Multiple Excel Files Into One Excel File And It Works For 3 Source Files But Its Not Working If Workbook With Worksheet Count Is > 3?

Aug 18, 2011

I'm trying to copy multiple excel source files into one excel file. My current code is working only for 3 source files..If more than 3 files are there, it doesn't copy the data but creates blank work sheet in the output excel file. Lets say I have a source folder with 5 excel files. Each workbook contains one worksheet with data. It copies upto 3 worksheets along with data into output excel file.

Lets say excel1 contains A as work sheet, excel2 contains B as work sheet ,excel3 contains C as work sheet ,excel4 contains D as work sheet ,excel5 contains E as work sheet .Now my output excel file should look like..OutputExcel with A, B, C, D, E along with respective data.But my current code is giving output as A,B,C worksheets along with respective data but its creating blank sheet1,sheet2 in place of D & E.

SSIS Script Task Vb.Net Code:

Sub Main()
Dim filePath
String =


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Feb 8, 2012

I have got problem, I got function which should correctly check if Woorkbook is open or not, but anyway if i got open my excel file or not I always get False Value in MsgBox. I don't know where is a problem. Please check it:

Imports Excel = Microsoft.Office.Interop.Excel
Public Class Form1
Function IsXLBookOpen(strName As String) As Boolean


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Sep 4, 2009

I'm trying to open open an excel workbook thats going to be used as a template that i'm going to paste raw data in. It comes up with as an error saying that the file is missing, but its not. The path and file name are correct. So I'm curious if its something else or what.[code]...

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Mar 28, 2009

I have to write a macro which should run a .BAT file and

should enter username and password. click on 'OK' button. click on other buttons available on the application.

how can i do all these things from excel VBA.

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Why Is The Message Box Behind The Excel Workbook?

May 16, 2010

In the following code why does the message box display behind the workbook,instead of on top of it? It does this related to the line, app.Visible = True.  if this line is commented out the message box appears in front, but there is no workbook visible. I've used the message box in other places without a problem. Is there something fundamental here that I'm missiing?


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Office Automation :: Check If Workbook Is Open?

Jul 26, 2010

how I might check to see if a specific Excel Workbook (call it Test.xlsx) is open?I have a routine that calls a subroutine. Sometimes at the time of the call Test.xlsx is open, sometimes not. So when the subroutine runs, I need it to check first to see if Test.xlsx is open. If it isn't then the subroutine should open it and perform the subroutine's purpose operations. If it is open, it should not try to "re-open" it or worse open a copy of it; it should simply perform the subroutine's purpose operations.

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Add Multiple Worksheets To An Excel WorkBook?

May 10, 2010

I wrote code that creates an Excel workbook wit a single worksheet (see below).  How can I update this to add multiple worksheets to the workbook?

''' <summary>
''' Create a new XLS Excel spreadsheet based on a passed CSV (comma separated values) file.
''' </summary>


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Jun 5, 2011

I'm trying to create an excel 2003 workbook from my project I referenced the code from this website [URL]

However i'm getting error on this line "objSheets = objBook.Worksheets"

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

''Create the Excel object declaration

Dim objExcel As Excel.Application = Nothing


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Create Excel Workbook With Macros?

Jun 30, 2011

need to create an excel workbook with macros that clients accessingthe web app will download. Data to populate the workbooks comes from a database and I need macros to generate lookup tables in the workbooks. I cannot automate Excel to do this sincewill NOT beinstalled on the server. Which tool or component can I use for this task?

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Creating Excel Workbook Dynamically Through .net?

Jun 5, 2011

to create excel workbook dynamically where data will be input and manipulated by user. i want graph as well to be created using the data i manipulated and entered.i want as many as work sheets to be added in workbook once it is created.

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Declaring Excel Workbook In VS/VB 2010?

Mar 25, 2011

My question centers upon the two approaches, (1) and (2), shown below, to declaring Excel workbooks in .Net.The two approaches interact differently with the lines "wkbk10 =" and later with

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Multithreading Errors With Excel Workbook?

Aug 26, 2009

I have a .Net program that responds to worksheet updates of an Excel 2003 workbook.  Sometimes when the worksheet is updated and I try to write related data to my forms, I'm getting "Cross-thread operation not valid...." errors.  This confuses me, as I have never done any multi-threading in my program.  Does the mere act of me responding to events of an external excel worksheet mean I am now multithreading?  Is there a way to handle the events without multithreading?

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Retrieve And Save To Another Excel Workbook?

May 17, 2012

I tried the following code to retrieve data from an excel file,apply query and save the result of query to another excel file. Now there are two problems: One,I am getting the required data but some reduntant unwanted data too. Second,It only works if the excel file, from which the data is retrieved, is open.

Dim dr As OleDbDataReader
Dim i As Integer
Dim strLine As String = ""


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Aug 28, 2010

I am working on an application where I need to locate a range of cells within a worksheet.  Since the actual location of the data will vary for each worksheet, I have come to the conclusion that I can put a string near the range that I am looking for (i.e. the text "*SUMMARY*") and since I will know the location of the data that I am looking for relative to the location of this text string, it should work.

I have made some progress but am having trouble getting the Find method of the range component to work.  My code is below.  This code finds each worksheet and shows me the name but I also need to to find the location of the cell with the string "*SUMMARY*" in it (if it exists).

Imports Microsoft.Office.Interop.Excel
Public Class Form1
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Feb 16, 2012

I wanted to know if i could use (visual studio) to create an application that seaches these worksheets for a key word then returns any rowns with this key word on?

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Feb 21, 2011

I have a little problem with a small application that uses an excel workbook, and i don't know what's the best way to handle this.In the past every computers here in the company had the same culture and the same office version/language.Now the company bought some new machines, that came with english version of the office (en-US). Now the program doesn't work, throwing the exception related with the assembly of the office.

I have two solutions to solve this, install the mui in all the computers, or the one that i want, adapt the application to work independent of the culture in the client machine.So how to accomplish this? Set the application culture to the same culture in the computer (i think this will not work, because the excel assembly that i ship with the application isn't the correct one for the client language it's the assembly of my machine language)... One copy for each language, once again it's not possible

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Write Excel 2007 Workbook With C#, .NET?

Nov 29, 2010

Content in Excel 2007(as the attachment):

C# Source:
private void ExcelDocViewer( string fileName )
02 {
03 try


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Jan 7, 2010

How to get MAC address of client machine in c# and

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Office Automation :: How To Reference Open Workbook [VS 2008]

Aug 11, 2010

Edit by Moderator: [URL]...I know this thread is extremely old but it applies to my situation.Using Visual Studio 2008, VB, I get an error in this code:

Dim strWorkbkName As String
Dim strWorkshtName As String
Dim XlApp As Object
Set XlApp = GetObject(, "Excel.application")


not reply to threads which have been inactive for more than one month and please start your own threads to ask your own questions. Since you question is about VB.Net, I have moved your thread from the Office VBA forum to the .Net Office Automation forum.

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