Question

如何保证MS Word进程退出（使用C＃Interop库）？

我目前的做法：

// close word document ("doc")
((_Document)doc).Close(SaveChanges: WdSaveOptions.wdDoNotSaveChanges);
if (doc != null)
{
    System.Runtime.InteropServices.Marshal.ReleaseComObject(doc);
    doc = null;
    GC.Collect();
    GC.WaitForPendingFinalizers();
}

// close word application ("word")
((_Application)word).Quit(false);
if (word != null)
{
    System.Runtime.InteropServices.Marshal.ReleaseComObject(word);
    word = null;
    GC.Collect();
    GC.WaitForPendingFinalizers();
}

// and here is how it fails
Process[] pname = Process.GetProcessesByName("WINWORD");
Assert.IsTrue(pname.Length == 0);

来源：

c# MSOffice Interop Word will not kill winword.exe

Disposing of Microsoft.Office.Interop.Word.Application

Microsoft.Interop object won't quit or "release"

Excel interop COM doesn't close

Ambiguity in Word Interop code

Answer 1

如果使用GC方法滑动堆，则无需使用ReleaseComObject。另外请注意，您需要两次调用GC方法：

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

无论如何，我总是建议使用System.Runtime.InteropServices.Marshal.ReleaseComObject来释放Office（Word）对象。然后在Visual Basic中将变量设置为Nothing（C＃中为null）以释放对该对象的引用。您可以在Systematically Releasing Objects文章中详细了解相关内容。它与Outlook有关，但相同的规则可以应用于任何Office应用程序（包括Word）。

Answer 2

无论如何对我来说都是工作

Word.Application app = null;
Word.Document doc = null;
Word.Tables tables = null;
Word.ContentControls mainControls = null;

try
{
    app = new Word.Application();
    app.ScreenUpdating = false;
    app.Visible = false;
    app.DisplayAlerts = Word.WdAlertLevel.wdAlertsNone;
    doc = app.Documents.Open(fileName);
    tables = doc.Tables;
        //.. my code 
        if (tables.Count < 1)
        val = mainControls[2].Range.Text ?? "";
        //end of my code
    }
catch (Exception exc) { G.log(exc); }
finally
{
    //CLEAN UP
    GC.Collect();
    GC.WaitForPendingFinalizers(); 
    if (mainControls != null)
        System.Runtime.InteropServices.Marshal.FinalReleaseComObject(mainControls);
    if (tables != null)
        System.Runtime.InteropServices.Marshal.FinalReleaseComObject(tables);
    if (doc != null)
        System.Runtime.InteropServices.Marshal.FinalReleaseComObject(doc);
    app.Quit();
    if (app != null)
        System.Runtime.InteropServices.Marshal.FinalReleaseComObject(app);
}

如何使用C＃Interop强制退出Word

2 个答案: