终止excel.exe的进程

using System.Diagnostics;
using System.Runtime.InteropServices;

/// <summary>
/// 获取进程ID
/// </summary>
/// <param name="hwnd">窗口句柄 由FindWindow获取</param>
/// <param name="ID">进程ID</param>
/// <returns></returns>
[DllImport("User32.dll", CharSet = CharSet.Auto)] 
public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID); 

/// <summary>
/// 关闭Excel进程
/// </summary>
/// <param name="excel"></param>
public void KillExcel(Microsoft.Office.Interop.Excel._Application excel)
{
    //获得句柄
    IntPtr ptr = new IntPtr(excel.Hwnd);
    //获取进程ID
    int processID = 0;
    GetWindowThreadProcessId(ptr, out processID);
    //获取进程
    Process process = Process.GetProcessById(processID);
    //关闭进程
    if (!process.CloseMainWindow())//尝试关闭进程
    {
        process.Kill();//强制关闭
    }
}

public void Dispose()
{
    System.Runtime.InteropServices.Marshal.ReleaseComObject(this.worksheet);
    this.worksheet = null;
    System.Runtime.InteropServices.Marshal.ReleaseComObject(this.workbook);
    this.workbook = null;
    if (this.application != null)
    {
        this.application.Quit();

        //关闭Excel进程（程序异常关闭的情况下）
        this.KillExcel(this.application);

        System.Runtime.InteropServices.Marshal.ReleaseComObject(this.application);
        this.application = null;
    }
}