open_gps.Enabled = false;

            close_gps.Enabled = true;

        }

        //菜单:关闭GPS设备

        private void close_gps_Click(object sender, EventArgs e)

        {

            if (gps.Opened)

            {

                gps.Close();

            }

            open_gps.Enabled  = true;

            close_gps.Enabled = false;

        }

        //菜单:退出

        private void exit_Click(object sender, EventArgs e)

        {

            if (gps.Opened)

                gps.Close();

            Close();

        }

        //获取经纬度坐标值

        private void getdata_Click(object sender, EventArgs e)

        {

            string str;

            if (!gps.Opened)

            {

                str = "GPS设备没有打开,请点击打开GPS菜单后重试!";

                MessageBox.Show(str);

                return;

            }

            if (device == null)

            {

                str = "GPS设备打开错误,请重新插拔GPS卡后重试!";

                MessageBox.Show(str);

                return;

            }

            if (position != null)

            {

                string strJd;       //经度

string strWd;  //纬度

                strJd = position.DoubleLongtitude.ToString();

                strWd = position.DoubleLatitude.ToString();

                DialogResult result;

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