Office Automation :: Code Hangs When An Excel File Is Opened To A Excel Workbook Object?

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


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.


Office Automation :: Excel File - Set A Reference To The Microsoft Excel 12.0 Object Library

Oct 6, 2009

I'm trying to upgrade a VB6 app to VB 2008. I have read the article in the tutors corner about automating Excel from VB but I cannot get it to work. Heres what I have done:

1) set a reference to the Microsoft Excel 12.0 Object Library

2) Added "Imports Excel = Microsoft.Office.Interop.Excel" to the top of the module

3) in a routine I have added: Dim X As New Excel.Application Here's where I get an error: Error 75 'Application' is ambiguous in the namespace 'Microsoft.Office.Interop.Excel'.

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Office Automation :: Excel 2003 Workbook Project

Oct 6, 2010

I have a seemingly simple question I can't seem to figure out. I have an old VBA application that connects to a database using OLEDB, grabs data, and populates an excel sheet using Excel.QueryTable after the user clicks a button. I'm trying to port this rather large program to VB.NET. I've created a few projects in my solution, one of which being an ExcelWorkBook. I want this workbook to load each time users launch the program and be blank until they click a button which will populate the data.


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Office Automation :: Excel Object Library 10.0 Versus 11.0 Version?

Jan 6, 2012

I have 2003 xls file which is saved on a web share point. File combines vbs functionalities, of which one is uploading data to this file (from another file on the same share point) by clicking command button.When I open file from my location it all functionalities are working without problems. My customer is running it from his location, he is also using Excel 2003, the moment he wants to upload the data he gets the bug.

Message: Method "Worksheets" of object "_Global" failed

I checked and it seems that in the references he has 10.0 object library and I have 11.0 What i can do to unify the coding so it is indifferent from Object Library version?I have read about late va early binding, I guess i'm using late binding I also check that i can adjust late binding buy standard codes.

Dim oExcel As Object
Dim oWorkbook As Object
Dim oWorksheet As Object


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Office Automation :: Excel Program Leaves EXCEL.EXE Floating After Completion

Feb 24, 2012

I am writing a program that loops through all of the sheets in an Excel workbook and saves each sheet as its own workbook. It turned out to be a bit trickier than I expected, since the Sheet.Copy method creates a strange object (see here for the MSDN discussion that I believe is relevant: [URL]. Anyway, I found a Stack Overflow post [URL] that got me to where I am, which is essentially complete, outside of one hanging EXCEL.EXE process that is left after the program completes, which I believe is a result of the sheet.copy method creating a new workbook (potentially a new application as well?). The other thing I run into, which I believe is related to this, is that even though I have my application set to visibility off, when I run the program, excel still opens up and is visible going through the steps.

Here is my code:

Imports System.Data
Imports System.IO
Imports Microsoft.Office.Interop


Now I think the problem comes from the end of the loop, where I try to close the export file and the new worksheet it creates:

'close excel and release com objects
exportsheet = Nothing
xlApp1.Workbooks(fileNames(counter - 1)).Close(False)

I can't figure out what to do to release the `ComObject` for the new worksheet that is created. I have been trying all sorts of things, but it always throws a COM error when I do it and if I try to define it as nothing (like I do with exportsheet) is says that it is read only by default, so I can't do it. It seems like it should be something as simple as: System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp1.Workboo ks(fileNames(counter - 1))) But that is not the case. I have tried a few variants of this and I am thinking it has to do with the MSDN link above, but I can't quite sort out what to do. So the code works for my purposes, outside of leaving one EXCEL.EXE after it is done. As far as a test file, I am just using an Excel file with 3 sheets and I put some information on each and change the sheet name, so it is easy to see if it is working or not.

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Office Automation :: Excel - Code To Compare 2 Worksheets In The Same Work Book

Dec 12, 2009

I have been looking for a good Example of Code to Compare 2 worksheets in the Same work book I have not had much luck. The Goal when complete is to compare Sheet 1 to Sheet 2 Then the Difference Recorded on Sheet 3 as a complete row with a date Stamp in A . If it is just a change then it is color coated Orange. If total new entry that was not on the sheet then it would be green If a Row is deleted in would be Pink.

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Office Automation :: Error With Excel Dll On Server Without Excel?

Jun 15, 2011

We have a VB 2005 program that reads data from a database and builds an Excel output file to be emailed. This works fine from my computer but when we put it on the server it fails on the Excel functionality.

The error is: Unhandled Exception: System.Runtim.InteropServices.COMException

Although Excel is not installed on the server we did also build a Setup program to install our program. It copies the Microsoft.Office.Interop.Excell.dll to the server folder with the exe.I thought the setup program should register the Excel DLL and the program should work even if the server does not have Office or Excel installed.

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Office Automation :: Excel Import CSV File

Oct 19, 2009

How do I import data in Excel from a CSV file using C#? Actually, what I want to achieve is similar to what we do in Excel, you go to the Data tab and then select From Text option and then use the Text to columns option and select CSV and it does the magic, and all that stuff. I want to automate it.


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Office Automation :: Method Not Found: Void Excel.Range.set_Value(System.Object,System.Object)

Mar 11, 2009

following error message:

Method not found: Void Excel.Range.set_Value(System.Object,System.Object)

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Office Automation :: Automation Excel Without Install Excel

May 28, 2009

I am developing an application using excel automation.The worst thing is the client's side doesn't have excel installed.What is the solution for this case?

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Office Automation :: Write A Code For Excel So That It Generates Results In Last Empty Column On Sheet

Jan 4, 2012

I am trying to write a code for excel so that it generates results in the last empty column on the sheet. below is a sample data of what is there:[code]

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Office Automation :: Fill An Excel File With Some Data?

Dec 13, 2011

In my app I need to fill an excel file with some data. On change of customer the data needs to be on another worksheet, sheet renamed and so on.

The workbook now has 19 sheets (wSheet.Add(,,16), the first worksheet gets renamed to custno. and the sheets gets filled.

But whatever I try, I can't get onto the other worksheets.

All I Googled seem to raise errors; following code is part of a nested 'If'

Dim excel As New Microsoft.Office.Interop.Excel.Application
Dim wBook As Microsoft.Office.Interop.Excel.Workbook
Dim wSheet As Microsoft.Office.Interop.Excel.Worksheet
If w < 1 Then


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Office Automation :: PrintPreview Excel File From .net 2008?

Feb 12, 2009

The program creates the report in excel just fine and it creates the borders and headers. I want to know how can I printpreview an excel file from You can refer a tutorial or explanation or sample of how can I do this.

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VS 2008 Write Excel File Without Office Automation?

Aug 9, 2010

I have a VB app that exports some data to dbf tabes.I have empty dbf files,I write data and then save them,all works fine,but now I need to export to a .xls file(I have a structure just like dbf),I need to write data to the file without having Excel installed.

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Check For Opened Excel Workbook (if Any) Before Closing Using 2005

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.)


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Office Automation :: Opening An Excel File Using VB 2010 Express?

Sep 22, 2010

I have created a picturebox in a form that I want to click on and then it would send me to a excel file that I already have created. I don't know if it is even possible. Do I need to use a button instead?, or am I just way off all together.

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Office Automation :: Ow To Close Excel File After Reading Or Writing?

Nov 9, 2011

I did ana application that interacts with excel (reading and writing files)But when the application ends and I close it, the excel file is still in the task manager procceses (ctrl+alt+del ->Proccesses)How can I completely close it?I'm using 2010 express

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Office Automation :: Load Excel, Perform Operations And Then Show File?

Feb 28, 2010

I'm trying to figure out some Excel automation. I have a form set up so the user can click on a label to open an Excel file (as a background process I guess) so the file isn't actually visible. Once they click on the "Convert to Count" button it will multiply all the values in Column B by 1,250 and put the output in Column C. Once it has finished this action, it makes the file visible so the user can choose to save it or not. Also, some users have Excel 2003 and some have 2007. Would it be possible to be able to load both xls and xlsx?[URL]..I must say I am very new with .NET and have a little bit of knowledge with VB6. I'm not sure where to even begin. I've looked up some ways to load an excel file but couldn't get it to work the way I need it to. Most of the ways I found were loading the file into a DataGridView. I don't want to use a DataGridView if I don't have to. Some of the files the users might be loading could have 10,000+ rows and that would take too long I think.

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Office Automation :: Automatic Deployment Of Excel Automation Addin?

Jan 25, 2011

I have written an automation addin in Excel with C# (addin.dll). To use the addin, I need to 1. register it using "regasm /codebase c:...addin.dll"2. select in ExcelOptionsAddInsExcel AddinsAutomation the respective addin from the list

I would like to automatize 1) and 2), so that the user just needs to run an exe-file in order to use the addin. 1) should be no problem, but how can one automatize 2)?

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Office Automation :: Excel 2003 Automation With VB 2005 Express?

Apr 20, 2010

Ok basically what I need to do is the following:Read FirstExcelDoc (attached)For every row in that: Retrieve data from sql server db based on info in the Orange columns of FirstExcelDoc Let's say I retrieved data elements A, B, C, D, and E from sql server. Then I need to enter those same data elements A, B, and C in another excel spreadsheet (which has formulas etc) After inputing A, B, and C in that spreadsheet, read a couple of calculated fields and compare those results to data elements D and E retrieved originally from SQL Server DB. Finally, output the results in the Blue columns of the FirstExcelDoc spreadsheet for that row.Loop through and do the same thing for row 2 of the FirstExcelDoc and keep on until you see "END TEST" in the FirstExcelDoc.

I'm looking for a method of doing this efficiently. I have read several articles over the past few days as well as those from Mike R. but just need some direction to get started on this.To start of I'm looking for whether to read the entire FirstExcelDoc spreadsheet or just read the info for first policy number(2nd row) and process it and write out the blue column info for that row and then loop through and come back and read the second policy number (3rd row) etc... Please attach a code snippet for either way of reading the data.

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Office Automation :: Orphan Excel Process Started Via Automation

Jun 17, 2009

I'm using excel via interop in application.Sometimes users kill application that created excel instance and that results in excel instance sitting in memory without any chance of disposing it.First I tried to tackle this using ROT(running object table) looks like not all instances of excel are registered there.Than I tried to somehow mark excel process after it is started via interop.[code]This works as long as excel is visible but in my case excel window is invisible.All I need is to somehow mark process that started via automation with the parent PID, so that later I can kill it if parent does not exist.

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Office Automation :: MultiThreading In MS Office 2007 (Excel, Outlook, Etc)?

Mar 28, 2011

i was wondering if someone could give me the final explanation on what i might be doing wrong here.I spent a lot of time reading around the net and the forum about how to add Threading capabilities to a VB project.

Nos, i've got .NET 4 installed, and i've added the system.tsr and mscorlib.dll files as reference in, say, Excel 2007 (see screenshot).However, when i try to make a thread with anything as basic as "Dim Thread1 As System.Threading.Thread", i get a user-defined type not found error.Indeed, when i use the object browser to see what's in the System file, theres nothing remotely linked to any Threading, and in the mscorlib file, nothing under "Threading" either, just a few Thread related functions, but nothing defining a data type

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Office Automation :: Excel Automation - Call Rejected

Dec 17, 2010

I have been pulling my hair out trying to fix this.


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Office Automation :: Excel Automation Causing: Rpc_e_serverfault

Jun 1, 2010

We have a vb program which is run on our server by scheduled task every day. The program opens about 30 excel files, refreshes the data connections, pivot tables and then saves the document in another location.

This may run fine for a couple days but sooner or later the process starts crashing, usually with this error: RPC_E_SERVERFAULT.

My question is, Is it expected that continually opening/closing/refreshing workbooks will inevitably cause the Excel object to crash at some point.

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Office Automation :: Excel Automation - Cannot Use Office PIAs

Feb 14, 2009

It appears that when one creates an instance of Excel, using CreateObject, (Late binding), the suggested Excel closing function (with GC.collect etc) does not work. I have tried several suggestions, and the only one that works is process.kill method. Do you see any problem in using this? BTW: the reason we are using late binding is that we cannot use Office PIAs....not sure which version of Office would be installed on the client site. We work with O2003, but the client might still be at 2000 or 2002.

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Office Automation :: .net Automation Excel App Not Closing

Sep 25, 2009

I'm having an issue where my excel.exe process doesn't close until I close my .net application. I'd like to avoid using Process.Kill() if at all possible.


Private Sub WriteRowsToXls(ByVal rows As DataRowCollection, ByVal xlsPath As String, ByVal showStatus As Boolean, Optional ByVal AddTotals As Boolean = True)
Dim xlsApp As New Microsoft.Office.Interop.Excel.Application


This method references a couple of other methods I use for repeated formatting tasks, I'll include those methods below. (I added the FinalReleaseComObject into the other methods after reading Mike's thread but the issue persists)

Private Sub SetRangeValidation(ByVal rng As Range)
With rng.Validation


Method SetRangeAllBorders does about the same as these other methods but my post is too long to add it. The only other things not shown in these code snippets are a few string variable that are defined in the class, studentWS, studentsWSPW, paymentsWS and paymentsWSPW My App creates an instance of the class, loads some data, runs the method above, and then sets the class to nothing. I'm using .NET 3.5 automating Excel 10

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Turn A Microsoft.Office.Interop.Excel.Chart Object Into A Microsoft.Office.Tools.Excel.Chart Object?

Aug 5, 2010

Basically I've coded an Excel 2007 project in VB.NET 2010 that allows you to create charts with a fair amount of interactivity. I want the user to be able to save and reopen this workbook and still have that interactivity in any already-created charts, so they don't have to re-create them.

When I create the charts, I use Sheet1.Controls.AddChart(...), which returns a Microsoft.Office.Tools.Excel.Chart with which I can handle events and such. However, when I reopen the file and look through the Sheet1.Controls collection, there are no Chart objects. Accessing the charts through Sheet1.ChartObjects.Chart gives me Interop Charts, when I need the Tools Charts.

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Office Automation Using Excel And .Net?

Aug 7, 2009

when the worksheet is built i get the error message "Object reference not set to an instance of an object.".Here is my code:


Dim myXLApp As Excel.Application
Dim myXLWbs As Excel.Workbook
Dim myXLSht As Excel.Worksheet


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Office Automation :: Add A Combobox To Excel

Jun 19, 2012

I am creating a new software with visual studio 2010 using the program language visual basic .NET, well in that software I create a new file in excel 2007, my question is because I do not know how I can create a combobox with data of my database inside, [code]

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Office Automation :: Closing Excel.EXE From App?

Jun 9, 2010

I work for a financial firm doing work.I open an excel doc and populate it using calls to range...i however dont dim the range...I call xlsSheet.Range.ValueI have about 30 ranges i update in this method before printingdo i need to set the .Range.Value to Nothing in order to close the excel.exe

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Office Automation :: Connecting To Excel Via ADO

Dec 1, 2009

When connecting, I am getting the error 'Provider is not specified and there is no designated default provider.'[code]

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Office Automation :: Excel .NET Interaction Via DLL?

Dec 7, 2010

I would like to keep part of an Excel workbook open to the user (including some VBA code) while protecting other code. What I hope to accomplish is to rewrite some of my code from Excel VBA in VB.Net and compile it into a DLL which I can then call from Excel VBA. I want end users to be able to modify most of the code in the module, but some of the process should never be touched. Say I have an array in VBA

ArrONE(1 to n, 1 to n)

I would like to pass this through into a DLL and return a new array back to VBA:

ArrTWO(1 to n, 1 to n)

1) What are the best resources for VB.Net?

2) What are some main differences between VBA and VB.Net code

3) I have read that VB.Net doesn�t handle Variant data types, which (as far as I know) is a requirement to perform matrix multiplication in Excel VBA. Any detail on this issue would be of use.

4) VB.Net test environment? I often use msgboxes or simple subs printing to a spreadsheet to test my code in Excel VBA as I go to make sure everything I code is working properly before advancing. What would be .NET equivalents.

5) How to compile VB.Net into a DLL

6) How to call a DLL from Excel VBA

7) What effect will this have on the speed of my procedure?

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Office Automation :: Write To New Excel Row?

Sep 10, 2009

I am trying to write data to an excel spreadsheet. Simply just todays date and the value of textbox1. I can successfully write it to excel, but how do I get it so each time the application runs it writes the data to the next available row?? I know there must be some loop involved but am having trouble with the coding..

this is what I have so far.

Imports Microsoft.Office.Interop
Imports System.IO
Imports Excel


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Office Automation Saving To Excel

Mar 10, 2010

The following code is working with two exceptions: The ** are lines were a message box will appear saying that "book2.xls is already present. Do you want to save as? " I am not sure how to fix this. I would be interested to know if I am missing something or if there is a better way.[code]

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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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Office Automation - Excel Range References

Apr 22, 2010

I want to define a range in Excel, but I do NOT want to use "A" or "D" references for columns. I am making a table, and to set it's range I use:

However, at the time i write the code I do not know how many columns will be involved, so I don't know if "D" is the end column. For rows this is fine, as i could write this:
.Range("A" & i & ":D" & j)

But how do I do this for columns? I really would rather not have to convert my integer number for the end column to text. If I know that the table should go from row 1 to 5 and column 1 to 10, how to I select this range?

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Office Automation :: .NET Add-in Does Not Work With Excel 2002

Jan 22, 2009

I have created a C# .Net DLL add-in for Excel.When I try it on my home machine with WinXP and OfficeXP 2003 it works as expected. When I try it on a couple of machines at work with WinXP and OfficeXP2002 it does not work.I have spent 2 days solid reading up on this subject in general and I still cannot get to the bottom of the problem. As far as I can work out what I am trying to do should work with Excel 2002.

Some details:

- I am using Visual Studio EXPRESS 2008 (C#).

- The assembly is signed with a Strong Name Key File.

- I have installed the OfficeXP (2002) PIAs.

- I have created a class DLL in accordance with many MSDN and other internet posts.

- I have registered the DLL using RegAsm.exe and GACUtil.exe.

- I have added registry entries for Excel for CURRENT_USER so Excel should know about the DLL.

The DLL adds some Automation functions (Tools-Addins-Automation) which can be accessed in cells within Excel (for example you would enter =MultiplyFirstBySecond(2, 3) in a cell and get a result of 6) and also implements the IDTExtensibility2 methods so that when Excel is opened it creates a button on the toolbar which when pressed pops up a message box. It it this functionality (adding buttons with code behind them) that I want to expand on.I have attached the zips of the batch and registry files I have created to register the DLL in the GAC and in the registry. I have also attached a zip of the complete project. I would like to know if there is anything I should check with my machine's setup or my project or my registration/installation of DLLs, PIAs etc in order to make my DLL work on my Excel 2002 machine.

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Office Automation :: Custom Color In Excel?

Aug 17, 2009

my program lets people pick their color to highlight different shifts.after data manipulation they can export the shifts to Excel.I want Excel to show up the same colors as the users picked so I know I need to add them to the workbook palette.the first color I import works fine but after that, all the colors get jumbled and messed up and put in random spots in the palette

WorkBook.Colors(paletteIndex) = RGB(dColor.R, dColor.G, dColor.B)

leads to

Excel.Cells(i, j).Interior.ColorIndex = paletteIndex

something must be wrong in these two lines. I get no errors, just the wrong set of colors.

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Office Automation :: Error Opening Excel In A Dll?

Apr 25, 2012

We have created a dll to convert an excel spreadsheet to a csv file. At the moment we open the xls file, an eror occured (file doesn't exist / is used by an other user)

Used code:
Dim excel As New Microsoft.Office.Interop.Excel.Application
Dim wb = excel.Workbooks.Open("d:my.xls") '<<<<<<<<<<< not possible to open
wb.SaveAs("d:my.csv", Microsoft.Office.Interop.Excel.XlFileFormat.xlTextMSDOS)

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Office Automation :: Excel - For Next Through Selected Cells?

Jun 21, 2011

I've an excel sheet which is populated with thousands of rows of data, is there a way in I can pick out only selected cells/rows without having to go through every row?

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