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

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    发表于 2021-5-22 16:29:58 | 显示全部楼层 |阅读模式

    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);
    }

     

    哎...今天够累的,签到来了1...
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