.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

How to run application made in vb.net of multiple instances of excel add ins

Posted By:      Posted Date: October 26, 2010    Points: 0   Category :Windows Application

My project is based on Excel Addins. and when i run my application then open excel and working my project running fine but when i am trying to open multiple excel then this condition my project not worked except single excel when opened. so i would like to work on multiple instances of excel running fine.

Plz help me out if u have any idea regarding this.

Thanks in advance,


View Complete Post

More Related Resource Links

To create Multiple Instances in windows application?


we are running multiple instances of application.we want to have  connection string seperate for each instance as long as instance is running?

How to achieve?

application created in .net 3.5

Please Help.

Multiple Instances of User Control


I have a user control that I place on a page severl times.  When I make a selection on a ddl in one one control the SelectedIndexChanged event fires for all the control on the page for that ddl.  So I get duplication of an insert that I do.  Is there a way to make sure these events are isolated so this doesn't happen.


Read Excel file from Web Application (C#)



I have a web app where user uploads a file.

File is saved in server locally and I want to read some data from it.

Currently my development  server has office 2003.

So do I need office 2007 in order to be able to  read an excel from office 2007 ?

What are other requirements  ?

I tried a test, using

Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook wrkBook; // = new Microsoft.Office.Interop.Excel.Workbook();

wrkBook = excelApp.Workbooks.Open(@"C:\www\excel_files\b.xls", ....);

But When trying to open the file I get the error:

Exception from HRESULT: 0x800A03EC

So I'm wondering what I'm missing.


Windows Forms: Give Your .NET-based Application a Fast and Responsive UI with Multiple Threads


If your application performs any non-UI processing on the thread that controls the user interface, it may make the app seem slow and sluggish, frustrating users. But writing multithreaded apps for Windows has long been restricted to C++ developers. Now with the .NET Framework, you can take advantage of multiple threads in C# to control the flow of instructions in your programs and isolate the UI thread for a fast and snappy user interface. This article shows you how. Also, it discusses the pitfalls of multiple threads and presents a framework for safe concurrent thread execution.

Ian Griffiths

MSDN Magazine February 2003

How to run multiple instances of workflow



I've created simple sequential workflow. It's only creates one task and is waiting in while loop until task is Approved. It works fine when I run only one instance of this workflow, but if I start another instance before first one is finished it gets stack and doesn't complete task an workflow stays in In Progress state forever.

Multiple domains in single asp.net mvc application




I want to use my asp.net mvc application with multiple domains (maybe of hundreds),

so I have created custom Route class that matches requests including domain.

Each domain could has different routes, so the number of routes in RouteTable can be huge

(eg 500 domains, each 20 routes = 10000 routes in RouteTable).

I am considering how it will be efficient?


I have an idea to replace RouteTable.Routes (of type RouteCollection)

with custom one (of type Dictionary<string, RouteCollection>).

But how I can override default route matching mechanism with my custom mechanism which will be two step:

1) retrieve RouteCollection from dictionary based on domain name

2) retrieve specyfic Route object (standard route matching mechanism)

How can I do this?


Maybe someone has better idea for solving this problem?


Thanks in advance


Excel 2007 Filter on multiple values

Hi Everyone,How do I use Excel 2007 Pivot Table's label filters/value filters to filter with multiple conditions? for example, I want to get all customers with customer name start with "G" and doesn't include "E" and with measure>100 and measure between 50-60.Regards,George

Importing Excel with multiple worksheets via MVC

Is there a way wherein I could import data from multiple sheets of an excel file?  Thanks in advance...

Enhance SSAS so that a calculation returns multiple cells at once (Excel fill not a single cell but

I wonder if somebody can help me with the following question. I would like to create an enhancement to SSAS in a way so that one can pass in multiple values, run a calculation and in return retrieves not one but multiple cell results at the same time e.g. retSet = functionABC(inSET) where inSet is somthing like 5 4 3 6 7 3 4 4 AND retSet is 4 6 7 8 9 3 4 4 All my calculated members in MDX return a single value BUT I need to have a calculation that if called returns multiple results (a set) at once and in a way so that Excel will properly pick up on it and consequently fills multiple cells in the Pivot table. Is that possible at all and if so how? I would not mind to write a little CLR assembly to enhance the SSAS but don't know how to pass the results back. Any ideas are highly appreciated. Dirk

Generating Multiple Excel Sheet using Reporting Services 2005.

<p> Hi, I'm currently developing a program using ASP.NET 2.0 (C#) and i am using Reporting Services 2005. One of the report requirements is to export a data to an excel with multiple excel sheet. Is there other way to generate multiple excel sheet using the reporting services? if yes, i would like to ask a sample code... Thanks in advance, JP  </p> 

Font didn't change in excel, after change was made on SSAS

Hello!   After I wrote MDX, I gave to my calculated field a format of “courier New” and font size of ‘9’. When I connected to SSAS using excel, and pulled my data but I don’t see the right format that I used. It is not working for any format. I used 2008 SSAS. What is the issue? Thx, Beney

SQLCE 3.5 connection from multiple application, data refresh

I have a native application (wm 6.5) using oledb to connect to a database. *******************************************************************************   result=CoCreateInstance(CLSID_SQLSERVERCE_3_5,0,CLSCTX_INPROC_SERVER,IID_IDBInitialize, (void**)&database);   ... // set properties  database->Initialize(); ******************************************************************************* This part of the app simply queries a single table for all records (query wrapped in a transaction of it own). I believe it is recommended that you keep a single connection for as long as possible, and therefore just create a new session each time I query the table. There is a second application (c#) which my application executes and then waits for. It updates and inserts new records. when the c# app closes and I get control back, my app then runs another query to see if anything has changed. My issue is that, the only way I can get the updated data is to un-initialize and re-initialize the database (IDBInitialize) interface created above.  Is there some properties I should be setting on the session/database in order for this to work. Or do I really have to spawn a new connection for every query?   Thanks in advance. Dylan

ssis 2008 Loading MULTIPLE EXCEL file

HI it is possible for me to load multiple text file using for each loop,but if i try the same process for EXCEL file then my excel source throws an error. Also when i created my variable in value  i have given the path of my excel file ,still it didnt help me..because the moment i map the variable with the connection string of source excel connnection(property->expression->connection string) it start giving error if you could help me or provide some reference it will be of great help http://bi-polar23.blogspot.com/2007/08/loading-multiple-excel-files-with-ssis.html i tried this link but got stuck with it on step 12 and 14 (below  is my connection string) and variable is @Filename which i have created Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\mushtaq.sheikh\Desktop\ForEach\New Microsoft Excel Worksheet1.xlsx;Extended Properties="Excel 12.0;HDR=YES"; The moment i try to edit my connection string by comparing connection string provided in link it gives error(an OLEBD error has occured with error code 0x80040E73) on excel source Thanks in advance

multiple instances of report manager VS multiple users

Hello, I want multiple users to access same report or different reports through report manager for a report server. Will the scenario of opening multiple windows of report manager on same machine and execute reports from all windows simultaneously mean same as multiple users accessing the reports at the same time? If not, then how should I generate the scenario of multiple users? Regards.

Exporting multiple gridviews in multiple excel tabs

Hi All, I am able to export multiple gridviews in a single excel worksheet My question is can I separate these gridviews in multiple tabs under the same excel file ? This is my current method under the link buttonprotected void lnkExport_Click(object sender, EventArgs e) { Response.Clear(); Response.Buffer = true; Response.AddHeader("content-disposition","attachement;filename=TrendAnalysisRpt"+StoreNum); Response.Charset = ""; Response.ContentType = "application/vnd.ms-excel"; StringWriter sw = new StringWriter(); HtmlTextWriter hw = new HtmlTextWriter(sw); HtmlForm frm = new HtmlForm(); this.grd_Inj.Parent.Controls.Add(frm); this.grdBody_1.Parent.Controls.Add(frm); frm.Attributes["runat"] = "server"; frm.Controls.Add(this.grd_Inj); frm.Controls.Add(this.grdBody_1); frm.Controls.Add(this.grdBody_2); frm.Controls.Add(this.grdBody_3); frm.Controls.Add(this.grdBody_4); frm.Controls.Add(this.grdMonth); frm.Controls.Add(this.grdDay); frm.Controls.Add(this.grdHours); frm.Controls.Add(this.grdLengthOS); frm.RenderControl(hw); Response.Write(sw.ToString()); Response.End(); } Thanks again!    

import multiple Excel 2007 files using openrowset

hello, I Have a folder that includes multiple excle files (ver 2007), i am trying  to loop through each file using vbscript to import its data to sql 2000 using openrowset but i am getting this error in the openrowset line "[Microsoft][ODBC sql server driver] [sql server] [OLE/DB provider returned message: the microsoft office access DB engine cannot open or write to the file '', it is already open exclusively by another user or you need permission to view or write its data] code 80040E14 source microsoft OLEDB provider for ODBC drivers Any help please    

An Excel Services Application setting does not allow the requested operation to be performed.

I'm facing a problem with Excel services and JSOM. On the page load, I'm registering a JSOM with a Visio webaccess webpart. On the shape selection changed event I'm trying to show a range of cells accordingly in the Excel web access webpart. Initially when the page is loaded and a shape selection event is fired, range.setValuesAsync(values); throws An Excel Services Application setting does not allow the requested operation to be performed. After pressing f5 on the page, it works fine. I came across a similar post in this link - http://social.technet.microsoft.com/forums/en-us/sharepoint2010programming/thread/B4739DB6-DDC1-42FB-BA6A-FFC41CBEFF1E but it was for Sharepoint 2010 beta 2 version. I'm having 14.0.4763.1000 - RTM build version. I have logged in as farm administrator. Log details Session=36.aceef71f-eb5b-4aab-9ce9-9db4728b45e5163.1.V22.91tY3PgMaeCbJtomFAb9Ab90.5.en-US5.en-US73.+0480#0000-11-00-01T02:00:00:0000#+0000#0000-03-00-02T02:00:00:0000#-006036.918121dd-d18e-4afe-b148-4cba08a0899b1.N b07378be-7293-4770-89cc-f136e1a8d7df WebServiceHelperMethods.ExecuteWebServiceRequestHandler: started processing 'SetRange' web method call b07378be-7293-4770-89cc-f136e1a8d7df WebServiceHelperMethods.ValidateContext: Operation requiring permissions 'SessionIdPresent, AllowEdits' not allowed according to the current permi
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend