在C＃中ComObject发布后如何修复Excel？

Question

执行以下代码后：

            Microsoft.Office.Interop.Excel.Application oXL;
            oXL = new Microsoft.Office.Interop.Excel.Application();
            oXL.Visible = false;
            oXL.IgnoreRemoteRequests = true;
            oXL.DisplayAlerts = false;
            Workbook oWB;
            oWB = oXL.Workbooks.Open(path, 0, false, 5, "", "", false, XlPlatform.xlWindows, "", true, false, 0, true, false, false);

            Sheets excelSheets = oWB.Worksheets;
            string currentSheet = "PC_HW_Info";
            Worksheet excelWorksheet = excelSheets.get_Item(currentSheet);

            string columnRange;
            int rowsNumber = 2;

            Range PC_User;
            PC_User = excelWorksheet.get_Range("A2", "A2");
            while ((PC_User.Value2) != null)
            {
                ++rowsNumber;
                columnRange = "A" + rowsNumber;
                PC_User = excelWorksheet.get_Range(columnRange, columnRange);
            }
            PC_User.Value2 = "aaaa";

            oXL.UserControl = false;
            oWB.SaveAs("valid path to my file", XlFileFormat.xlWorkbookDefault, Type.Missing, Type.Missing,
            false, false, XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

            oWB.Close();
            oXL.Quit();
            Marshal.ReleaseComObject(oXL);
            Marshal.ReleaseComObject(oWB);
            Marshal.ReleaseComObject(excelSheets);
            Marshal.ReleaseComObject(excelWorksheet);

我的Excel某种程度上已损坏，即使重新启动后，它也不会恢复其初始工作状态。 现在，我无法直接打开工作表，我必须使用“打开”->“浏览”来访问工作表。

在第一次运行时，当我打开已处理的原始文档的“已恢复”版本的工作表时，似乎已还原了该文件，但我又还原了它，但是从那时起，我无法像以前那样使用Excel。

有什么想法吗？ 我在ReleaseComObject上做错了什么？ 我应该如何关闭excel应用程序？

LE：如果我在关闭并释放对象的所有最后一行中添加注释，则说明它工作正常。

Answer 1

        Microsoft.Office.Interop.Excel.Application oXL;
        oXL = new Microsoft.Office.Interop.Excel.Application();
        oXL.Visible = false;
        oXL.IgnoreRemoteRequests = true;
        oXL.DisplayAlerts = false;
        Workbook oWB;
        Workbooks wbs = oXL.Workbooks; //Never use two dots, since the middle one needs free as well
        oWB = wbs.Open(path, 0, false, 5, "", "", false, XlPlatform.xlWindows, "", true, false, 0, true, false, false);
        Marshal.ReleaseComObject(wbs);

        Sheets excelSheets = oWB.Worksheets;
        string currentSheet = "PC_HW_Info";
        Worksheet excelWorksheet = excelSheets.get_Item(currentSheet);

        string columnRange;
        int rowsNumber = 2;

        Range PC_User;
        PC_User = excelWorksheet.get_Range("A2", "A2"); // Need to free
        while ((PC_User.Value2) != null)
        {
            ++rowsNumber;
            columnRange = "A" + rowsNumber;

            Marshal.ReleaseComObject(PC_User);
            PC_User = excelWorksheet.get_Range(columnRange, columnRange);
        }
        PC_User.Value2 = "aaaa";
        Marshal.ReleaseComObject(PC_User);


        oXL.UserControl = false;
        oWB.SaveAs("valid path to my file", XlFileFormat.xlWorkbookDefault, Type.Missing, Type.Missing,
        false, false, XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

        oWB.Close();
        Marshal.ReleaseComObject(excelWorksheet);
        Marshal.ReleaseComObject(excelSheets);
        Marshal.ReleaseComObject(oWB);

        oXL.Quit();
        Marshal.ReleaseComObject(oXL);

您忘记释放Range和工作簿对象。 您还犯了免费订购错误（尽管为了安全起见，我认为这不会产生影响）

通过不释放所有对象，您将在后台留下一个幽灵excel进程。 尝试杀死它们，看看是否能解决问题