杀excel进程

private void DoExcel()
    {
        Microsoft.Office.Interop.Excel.Application application = new Microsoft.Office.Interop.Excel.Application();
        //这里释放所有引用的资源
        application.Quit();
        KillExcel(application);
    }

[DllImport("User32.dll", CharSet = CharSet.Auto)] 
public static extern int GetWindowThreadProcessId(IntPtr hwnd,out int ID);
    public static void KillExcel(Microsoft.Office.Interop.Excel.Application excel)
    {
        IntPtr t = new IntPtr(excel.Hwnd); //得到这个句柄，具体作用是得到这块内存入口 

        int k = 0;
        GetWindowThreadProcessId(t, out k); //得到本进程唯一标志k
        System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k); //得到对进程k的引用
        p.Kill(); //关闭进程k
    }