C#彻底关闭Excel进程excel.exe

下面是完整的调用Excel，关闭Excel，结束Excel进程的代码. [原创]

环境：VS2008 + Excel

2011.11.26 再次修订

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;

namespace KillExcelProcess
{

    public partial class Form_KillExcelProcess : Form
    {
        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);
        //函数原型；DWORD GetWindowThreadProcessld(HWND hwnd，LPDWORD lpdwProcessld);
        //参数：hWnd:窗口句柄
        //参数：lpdwProcessld:接收进程标识的32位值的地址。如果这个参数不为NULL，GetWindwThreadProcessld将进程标识拷贝到这个32位值中，否则不拷贝
        //返回值：返回值为创建窗口的线程标识。

        [DllImport("kernel32.dll")]
        public static extern int OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);
        //函数原型：HANDLE OpenProcess(DWORD dwDesiredAccess,BOOL bInheritHandle,DWORD dwProcessId);
        //参数：dwDesiredAccess：访问权限。
        //参数：bInheritHandle：继承标志。
        //参数：dwProcessId：进程ID。

        public const int PROCESS_ALL_ACCESS = 0x1F0FFF;
        public const int PROCESS_VM_READ = 0x0010;
        public const int PROCESS_VM_WRITE = 0x0020;

        //定义Excel Application, Workbook
        public static Microsoft.Office.Interop.Excel.Application ExcelApp;
        public static Microsoft.Office.Interop.Excel.Workbook WorkBook;
        public static object doNotSaveChanges = XlSaveAction.xlDoNotSaveChanges;

        //定义句柄变量
        public static IntPtr hwnd;

        //定义进程ID变量
        public static int pid = 0;

        public Form_KillExcelProcess()
        {
            InitializeComponent();
            this.lb_ProcessID.Text = "";
        }

        private void bt_StartExcel_Click(object sender, EventArgs e)
        {
            ExcelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
            WorkBook = ExcelApp.Workbooks.Open("C:\\1.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                                                Type.Missing,Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                                                Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
            //获取Excel App的句柄
            hwnd = new IntPtr(ExcelApp.Hwnd);
            //通过Windows API获取Excel进程ID
            GetWindowThreadProcessId(hwnd, out pid);
            this.lb_ProcessID.Text = pid.ToString();

        }

        private void bt_KillExcel_Click(object sender, EventArgs e)
        {
            try
            {
                //正常退出Excel
                //ExcelApp.Quit()后,若Form_KillExcelProcess进程正常结束,那么,Excel进程也会自动结束.
                //ExcelApp.Quit()后,若Form_KillExcelProcess进程被用户手工强制结束,那么,Excel进程不会自动结束.
                WorkBook.Close(doNotSaveChanges, null, null);
                ExcelApp.Quit();
            }
            catch (Exception)
            {
                //正常退出Excel失败,可以记录一下日志.
            }
            finally
            {
                //强制结束Excel进程
                if (ExcelApp != null && pid > 0)
                {
                    int ExcelProcess;
                    ExcelProcess = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE, false, pid);
                    //判断进程是否仍然存在
                    if (ExcelProcess > 0)
                    {
                        try
                        {
                            //通过进程ID,找到进程
                            System.Diagnostics.Process process = System.Diagnostics.Process.GetProcessById(pid);
                            //Kill 进程
                            process.Kill();
                            this.lb_ProcessID.Text = "";
                        }
                        catch (Exception)
                        {
                            //强制结束Excel进程失败,可以记录一下日志.
                        }
                    }
                    else
                    {
                        //进程已经结束了
                        this.lb_ProcessID.Text = "";
                    }
                }
            }
        }

         
    }
}