#region 判断系统是否装excel
        /**//// <summary>
        /// 判断系统是否装excel
        /// </summary>
        /// <returns></returns>
        public static bool IsInstallExcel()
        {
            RegistryKey machineKey = Registry.LocalMachine;
            if( IsInstallExcelByVersion( "12.0", machineKey ) )
            {
                return true;
            }
            if( IsInstallExcelByVersion( "11.0", machineKey ) )
            {
                return true;
            }
            return false;
        }
        /**//// <summary>
        /// 判断系统是否装某版本的excel
        /// </summary>
        /// <param name="strVersion">版本号</param>
        /// <param name="machineKey"></param>
        /// <returns></returns>
        private static bool IsInstallExcelByVersion( string strVersion, RegistryKey machineKey )
        {
            try
            {
                RegistryKey installKey = machineKey.OpenSubKey( "Software" ).OpenSubKey( "Microsoft" ).OpenSubKey( "Office" ).OpenSubKey( strVersion ).OpenSubKey( "Excel" ).OpenSubKey( "InstallRoot" );
                if( installKey == null )
                {
                    return false;
                }
                return true;
            }
            catch
            {
                return false;
            }
        }
        #endregion

        #region 判断系统是否装word
        /**//// <summary>
        /// 判断系统是否装word
        /// </summary>
        /// <returns></returns>
        public static bool IsInstallWord()
        {
            RegistryKey machineKey = Registry.LocalMachine;
            if( IsInstallExcelByVersion( "12.0", machineKey ) )
            {
                return true;
            }
            if( IsInstallExcelByVersion( "11.0", machineKey ) )
            {
                return true;
            }
            return false;
        }
        /**//// <summary>
        /// 判断系统是否装某版本的word
        /// </summary>
        /// <param name="strVersion">版本号</param>
        /// <param name="machineKey"></param>
        /// <returns></returns>
        private static bool IsInstallWordByVersion( string strVersion, RegistryKey machineKey )
        {
            try
            {
                RegistryKey installKey = machineKey.OpenSubKey( "Software" ).OpenSubKey( "Microsoft" ).OpenSubKey( "Office" ).OpenSubKey( strVersion ).OpenSubKey( "Word" ).OpenSubKey( "InstallRoot" );
                if( installKey == null )
                {
                    return false;
                }
                return true;
            }
            catch
            {
                return false;
            }
        }
        #endregion