Question

鉴于以下代码（控制台应用程序C＃），Word应用程序在大约300-400毫秒后停止，但Excel应用程序继续运行。我无法找到阻止它的方法（不会杀死进程）。

有什么建议吗？

using System;
using System.IO;
using System.Text;
using System.Threading;
using System.Diagnostics;
using Microsoft.Office.Interop.Word;
using Microsoft.Office.Interop.Excel;
using Microsoft.Office.Interop.PowerPoint;
using System.Collections.Generic;

namespace test
{

    class Program
    {

        private static int GetProcessIdByWindowTitle(string AppId) 
        {
            Process[] P_CESSES = Process.GetProcesses();
            for (int p_count = 0; p_count < P_CESSES.Length; p_count++) 
            {
                if (P_CESSES[p_count].MainWindowTitle.IndexOf(AppId) != -1) 
                {
                    return P_CESSES[p_count].Id;
                }
            }
            return Int32.MaxValue;
        }

        static void Excel()
        {

            // create the MS-Excel Application
            Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();

            // Set the appID
            string appID = "zizozazezu";
            excelApp.Application.Caption = appID;
            excelApp.Application.Visible = true;

            // Excel needs a workbook to sete a caption visible...
            Microsoft.Office.Interop.Excel.Workbooks wbs = excelApp.Workbooks;
            Microsoft.Office.Interop.Excel.Workbook wb = wbs.Add();

            // find the 
            int processID = GetProcessIdByWindowTitle(appID);

            // verified this is the pid of MS-Excel
            Console.WriteLine(processID);

            // bailing out, no save
            object saveChanges = false;
            ((Microsoft.Office.Interop.Excel._Workbook)wb).Close(saveChanges);
            ((Microsoft.Office.Interop.Excel._Application)excelApp).Quit();

            System.Runtime.InteropServices.Marshal.ReleaseComObject(wb);
            wb = null;

            System.Runtime.InteropServices.Marshal.ReleaseComObject(wbs);
            wbs = null;

            System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);
            excelApp = null;

            Console.WriteLine("Excel is done...");

            for (int i=0; i<100; i++)
            {
                // Patience....
                Thread.Sleep(100);

                // still running???
                bool isRunning = false;
                try 
                {
                    Process p = Process.GetProcessById(processID);
                    if (!p.HasExited)
                    {
                        isRunning = true;
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("{0} Exception caught.", ex);
                }

                if (isRunning) 
                {
                    Console.Write(".");
                }
                else
                {
                    Console.WriteLine("Excel done at i=" + i.ToString());   
                    return;
                }
            }
            return;
        }

        static void Word()
        {
            // create the MS-Word Application 
            Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();

            // Set a caption - find the right instance
            string appID = "ladadidada";
            wordApp.Caption = appID;
            wordApp.Visible = true;

            // find the 
            int processID = GetProcessIdByWindowTitle(appID);

            // verified this is the pid of MS-Word
            Console.WriteLine(processID);

            // Stop MS-Word
            object saveChanges = false;
            ((Microsoft.Office.Interop.Word._Application)wordApp).Quit(ref saveChanges);

            for (int i=0; i<100; i++)
            {
                // Patience....
                Thread.Sleep(100);

                // still running???
                bool isRunning = false;
                try 
                {
                    Process p = Process.GetProcessById(processID);
                    if (!p.HasExited)
                    {
                        isRunning = true;
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("{0} Exception caught.", ex);
                }

                if (isRunning) 
                {
                    Console.Write(".");
                }
                else
                {
                    Console.WriteLine("Word done at i=" + i.ToString());    
                    return;
                }
            }
            return;
        }

        static int Main(string[] args)
        {

            Word();
            Excel();

            return -1;
        }
    }
}

Answer 1

所以有一些事情在我身上跳出来。

您不会在Excel应用程序本身上调用quit。这是它关闭的信号。
您还要确保在工作簿上调用“关闭”。
确保在完成后将所有对象设置为null
我还发现，不仅可以在我使用的所有对象上调用Marshal.ReleaseComObject，还可以调用Marshal.FinalReleaseComObject。
你是双点，这意味着你泄漏了一堆参考。糟糕的做法，并鼓励Excel闲逛

最后，要真的真的确保我杀了Excel，在完成上述所有操作后，我会通过窗口句柄终止进程。

public static bool TryKillProcessByMainWindowHwnd（int hWnd） {

uint processID;

GetWindowThreadProcessId((IntPtr)hWnd, out processID);

if (processID == 0) return false;

try
{
    Process.GetProcessById((int)processID).Kill();
}
catch (ArgumentException)
{
    return false;
}
catch (Win32Exception)
{
    return false;
}
catch (NotSupportedException)
{
    return false;
}
catch (InvalidOperationException)
{
    return false;
}

return true;

}

为了完成上述工作，您还需要确保包含Win32 API。

[DllImport("user32.dll")]
        private static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

如何从C＃控制台停止办公应用程序

1 个答案: