Question

我试图打开一个xls文件，读入几行数据，从数据中形成一个自定义列表，然后关闭excel表。这就是我所拥有的：

InitializeWorkbook(Path);
List<Custom> list = new List<Custom>();

Worksheet wkSht = (Worksheet)workBk.Worksheets[3];

if (wkSht.Name.Equals("Sht3", StringComparison.OrdinalIgnoreCase))
{
    Range PartNumRange = wkSht.get_Range("A:A", System.Reflection.Missing.Value);
    Range RevRange = wkSht.get_Range("C:C", System.Reflection.Missing.Value);
    Range SwRange = wkSht.get_Range("L:L", System.Reflection.Missing.Value);
    Range NomenRange = wkSht.get_Range("M:M", System.Reflection.Missing.Value);

    // Start at Row 6
    int i = 6;
    object Num = (PartNumRange[i, 1] as Range).Text;
    object Nomen = (NomenRange[i, 1] as Range).Text;
    object Sw = (SwRange[i, 1] as Range).Text;
    object SwRev = (RevRange[i, 1] as Range).Text;

    while (!string.IsNullOrEmpty(Num.ToString()) || !string.IsNullOrEmpty(Nomen.ToString()) || !string.IsNullOrEmpty(Sw.ToString()) || !string.IsNullOrEmpty(SwRev.ToString()))
    {
        if (!string.IsNullOrEmpty(Nomen.ToString()) && !string.IsNullOrEmpty(Sw.ToString()) && !string.IsNullOrEmpty(SwRev.ToString())
        {
            Custom item = new Custom();

            item.PartNumber = (PartNumRange[i, 1] as Range).Text.ToString();
            item.Nomenclature = (NomenRange[i, 1] as Range).Text.ToString();
            item.SwNumber = (SwRange[i, 1] as Range).Text.ToString();
            item.SwRevision = (RevRange[i, 1] as Range).Text.ToString();

            list.Add(item);
        }

        i++;
        Num = (PartNumRange[i, 1] as Range).Text;
        Nomen = (NomenRange[i, 1] as Range).Text;
        Sw = (SwRange[i, 1] as Range).Text;
        SwRev = (RevRange[i, 1] as Range).Text;
    }

    GC.Collect();
    GC.WaitForPendingFinalizers();

    Marshal.ReleaseComObject(PartNumRange);
    Marshal.ReleaseComObject(RevRange);
    Marshal.ReleaseComObject(SwRange);
    Marshal.ReleaseComObject(NomenRange);

    Marshal.ReleaseComObject(wkSht);
    workBk.Close(false, System.Reflection.Missing.Value, false);
    Marshal.ReleaseComObject(workBk);

    Marshal.ReleaseComObject(ExcelWorkSheets);

    ExcelApp.Quit();
    Marshal.ReleaseComObject(ExcelApp);

    GC.Collect();
    GC.WaitForPendingFinalizers();
}

我不知道为什么但是在完成执行后Excel没有关闭。只有当程序退出时才退出Excel。我尝试了各种各样的组合，避免了两点规则，但仍然没有。关于我缺少的任何想法？

编辑：调用ExcelApp.Quit将关闭ExcelApp和ExcelWorksheets。

Answer 1

您可能想看一下这篇文章：How do I properly clean up Excel interop objects?

有很多关于在C＃中处理COM对象的深入讨论，你可能会发现它们很有帮助。值得一读。

Answer 2

你还需要在

上打电话

ExcelWorkSheets
ExcelApp

调用Marshal.ReleaseComObject处理运行时可调用包装器，但让应用程序本身仍处于活动状态并且无法启动。

Answer 3

您可以尝试使用此代码 - 它可以正常工作

while (Marshal.ReleaseComObject(YourRange) > 0) 
{}

while (Marshal.ReleaseComObject(YourWorkSheet) > 0) 
{}

while (Marshal.ReleaseComObject(YourWorkBook) > 0) 
{}

YourApplication.quit()

while (Marshal.ReleaseComObject(YourApplication) > 0) 
{}

C＃在读取xls后关闭excel句柄

3 个答案: