C＃关闭excel句柄后读取xls

Question

我试图打开一个xls文件，读取多行数据，从数据形成自定义列表，然后关闭Excel表。这是我的：

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Excel完成后不关闭。只有在程序退出时Excel退出。我尝试了各种各样的组合，并且避免了两点规则，但仍然是不成功的。关于我失踪的任何想法？

编辑：调用ExcelApp.Quit关闭ExcelApp和ExcelWorksheets。

Answer 1

你可能想看看这篇文章：How do I properly clean up Excel interop objects?

有很多深入的讨论有关在处理COM对象C＃，你可能会发现有帮助。值得一读。

Answer 2

您还需要密切呼吁

• ExcelWorkSheets
• ExcelApp

调用Marshal.ReleaseComObject的部署运行时可调用包装，但保留应用程序本身还活蹦乱跳的。

Answer 3

您可以使用此代码尝试 - 它的做工精细

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

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

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

YourApplication.quit() 

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