I want to close a specific excel file amongst more than 1 open without killing excel process

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I have three excel files (MS office 16) opened. My code check for a specific file if it is open then it try to closes it but it closes excel process which ultimately closes all the excel files.

What I noticed is in task manager there is only one EXCEL.EXE porcess for all the files and under Details tab I can see all my open excel file with name.

What I have tried:

C#

System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcesses("Excel");    
  foreach (Process p in processes)
  {
      if (p.MainWindowTitle == "MyFile.xlsx - Excel")
      {
          p.Kill();
          break;
      }
  }

and below code does nothing :

Microsoft.Office.Interop.Excel.Application xlApp = new icrosoft.Office.Interop.Excel.Application();
            Microsoft.Office.Interop.Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(path);
            //xlWorkbook.Close(false);

            xlWorkbook.Close(true, Type.Missing, Type.Missing);
            xlApp.Quit();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkbook);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
            xlWorkbook = null;
            xlApp = null;

            GC.Collect();

Posted 20-Sep-19 2:25am

Member 14571809

Updated 20-Sep-19 2:39am

Maciej Los

v3

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Maciej Los · Answer 1 · 2019-09-20T02:39:00

If you want to check if Excel has already opened files, you have to get an instance of Excel application then loop though the collection of workbooks.

BTW: you need to learn how to use namespace aliases. See: using directive - C# Reference | Microsoft Docs[^]

C#

//on the top of module
using ExcelNs = Microsoft.Office.Interop.Excel;


//then
ExcelNs.Application oExcelApp =  (ExcelNs.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
foreach(ExcelNs.Workbook wbk in oExcelApp.Workbooks)
{
    if(wbk.Name="nameToFind")
    {
        wbk.Close(SaveChanges=false);
    }
}

For further details, please see: Launching Office Apps Programmatically – Andrew Whitechapel[^]