Why does calling Quit() on an Interop.Excel.Application in a .Net application not terminate the process?

Hi:

I'm having issues using Microsoft Interop.Excel.Application in my .Net program.

Consider the following code snippet:
                // Open to force Excel to perform calculation itself
                Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
                //excelApp.WindowState = Microsoft.Office.Interop.Excel.XlWindowState.xlMinimized;
                var excelWorkbook = excelApp.Workbooks.Open(tempFileName);
                excelWorkbook.Save();
                excelWorkbook.Close();
                excelApp.Quit();
                excelApp = null;

Open in new window



When I check in Task Manager, I notice that the EXCEL.EXE task created by the above code snippet does not terminate.

I'm not directly accessing any of the worksheets.
For my purposes all I need to do is:
1) Launch the application (which will force a recalc on open)
2) Save the spreadsheet
3) Terminate the application

What am I missing here?
Is there some sort of COM object that needs to be released?


Thanks,
JohnB
LVL 1
jxbmaSoftware ConsultantAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
Boyd (HiTechCoach) Trimmell, Microsoft Access MVPConnect With a Mentor Commented:
It sounds like you code may be starting two instances of Excel and only closing one.

You may also want to check out this:
How to open an Excel file in C#
http://csharp.net-informations.com/excel/csharp-open-excel.htm
0
 
zorvek (Kevin Jones)ConsultantCommented:
Did you try closing the workbook after saving it so that there are no open workbooks when invoking the Quit method?

Kevin
0
 
ShareD_PointCommented:
You may need to kill the excel process.

Process[] AllProcesses = Process.GetProcessesByName("excel");
// check to kill the right process
  foreach ( Process ExcelProcess in AllProcesses)
{
    if (myHashtable.ContainsKey(ExcelProcess.Id) == false)
        ExcelProcess.Kill();
}
AllProcesses = null;

Ref Link:

http://july-code.blogspot.de/2008/11/kill-excelexe-process-in-c-net.html

Hope this helps.
0
 
jxbmaSoftware ConsultantAuthor Commented:
There are not 2 instances of Excel running.

I just need to do a release on the workbook and application COM objects.
Thanks for pointing me in the right direction.

JB
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.