解决C#使用Microsoft.Office.Interop.Excel操作Excel后进程一直存在的问题

This resolved the issue for me. Your code becomes:

public Excel.Application excelApp = new Excel.Application();

public Excel.Workbooks workbooks;

public Excel.Workbook excelBook;

workbooks = excelApp.Workbooks;

excelBook = workbooks.Add(@"C:/pape.xltx");

 

　　

... 

Excel.Sheets sheets = excelBook.Worksheets; 

Excel.Worksheet excelSheet = (Worksheet)(sheets[1]); excelSheet.DisplayRightToLeft = true;

 Range rng; 

rng = excelSheet.get_Range("C2"); 

rng.Value2 = txtName.Text;

 

And then release all those objects, (Note: All the com object should be release, othewise the excel process won't be closed.)

System.Runtime.InteropServices.Marshal.ReleaseComObject(rng);

System.Runtime.InteropServices.Marshal.ReleaseComObject(excelSheet);

System.Runtime.InteropServices.Marshal.ReleaseComObject(sheets);

excelBook .Save();

excelBook .Close(true);

System.Runtime.InteropServices.Marshal.ReleaseComObject(xlBook);

System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);

excelApp.Quit();

System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);

 

I wrap this in a try {} finally {} to ensure everything gets released even if something goes wrong (what could possibly go wrong?) e.g.

public Excel.Application excelApp = null;

public Excel.Workbooks workbooks = null;

...

try

{

    excelApp = new Excel.Application();

    workbooks = excelApp.Workbooks;

    ...

}

finally

{

    ...

    if (workbooks != null) System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);

    excelApp.Quit();

    System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);

}