如何C＃的16进位转10进位

程式可以执行
我想要把下面5个变数原本16进位换成10进位
TAG_RSSI
TAG_LQI
TAG_DI
TAG_T1
TAG_T2
如何把输出的资料
TAG_ID
TAG_RSSI
TAG_LQI
TAG_DI
TAG_T1
TAG_T2
写入MySQL的资料库  public partial class Form1 : Form
    {
        string TAG_Data="";
        int TAG_Total = 0;
        bool Processing = false;        public Form1()
        {
            InitializeComponent();
            for (int i = 1; i <= 16; i++)
            {
                comboBoxPort.Items.Add("COM"+i.ToString());
            }
            comboBoxPort.SelectedIndex = 3;
            // 
            // dataGridTextBoxColumn1
            // 
            dataGrid1.TableStyles.Add(this.dataGridTableStyle1);
            dataGridTableStyle1.GridColumnStyles.Add(this.dataGridTextBoxColumn1);
            dataGridTextBoxColumn1.Width = 320;
        }        private void button_Start_Stop_Click(object sender, EventArgs e)
        {
            int i,Single_Length = 0;
            char[] com = new char[5];
            bool empty;
            string TAG_ID, TAG_RSSI, TAG_LQI, TAG_DI, TAG_T1, TAG_T2;            if (button_Start_Stop.Text == "Stop")
            {
                button_Start_Stop.Text = "Start";
                serialPort1.Close();
                return;
            }
            try
            {
                serialPort1.PortName = comboBoxPort.Text;
                serialPort1.Open();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error!!");
                return;
            }
            button_Start_Stop.Text = "Stop";
            Processing = false;
            System.Threading.Thread.Sleep(3000);
            com[0] = 'A';
            com[1] = '3';
            com[2] = Convert.ToChar(0x0D);
            serialPort1.Write(com, 0, 3);
            while (serialPort1.IsOpen)
            {
                while(TAG_Data.Length > 22)
                {
                    Single_Length = TAG_Data.IndexOf(Convert.ToChar(0x0D));
                    if (Single_Length >= 22 && Single_Length < TAG_Data.Length)
                    {
                        Processing = true;
                        TAG_ID = TAG_Data.Substring(0, 16);
                        TAG_RSSI = TAG_Data.Substring(16, 2);
                        TAG_LQI = TAG_Data.Substring(18, 2);
                        TAG_DI = TAG_Data.Substring(20, 2);
                        if (Single_Length > 22)
                        {
                            TAG_T1 = TAG_Data.Substring(22, 4);
                        }
                        else
                        {
                            TAG_T1 = "-";
                        }
                        if (Single_Length > 26)
                        {
                            TAG_T2 = TAG_Data.Substring(26, 4);
                        }
                        else
                        {
                            TAG_T2 = "-";
                        }
                        empty = true;
                        for (i = 0; i < TAG_Total; i++)
                        {
                            
                            if (dataSet1.Tables["TAGMessage"].Rows[i]["ID"].ToString() == TAG_ID)
                            {
                                dataSet1.Tables["TAGMessage"].Rows[i]["RSSI"] = TAG_RSSI;
                                dataSet1.Tables["TAGMessage"].Rows[i]["LQI"] = TAG_LQI;
                                dataSet1.Tables["TAGMessage"].Rows[i]["DI"] = TAG_DI;
                                dataSet1.Tables["TAGMessage"].Rows[i]["T1"] = TAG_T1;
                                dataSet1.Tables["TAGMessage"].Rows[i]["T2"] = TAG_T2;
                                tAGMessageBindingSource.Position = i;
                                empty = false;
                                break;
                            }
                            Application.DoEvents();
                        }
                        if (empty)
                        {
                            dataSet1.Tables["TAGMessage"].Rows.Add(TAG_ID, TAG_RSSI, TAG_LQI, TAG_DI, TAG_T1, TAG_T2);
                            TAG_Total++;
                            textBox1.Text = TAG_Total.ToString();
                        }
                        dataGrid1.Refresh();
                        TAG_Data = TAG_Data.Substring(Single_Length + 1);
                    }
                    else
                    {
                        break;
                    }
                    Application.DoEvents();
                }
                Processing = false;
                Application.DoEvents();
            }
        }        private void button_Clear_Click(object sender, EventArgs e)
        {
            dataSet1.Clear();
            TAG_Total = 0;
            textBox1.Text = TAG_Total.ToString();
        }        private void button_Exit_Click(object sender, EventArgs e)
        {
            serialPort1.Close();
            Application.Exit();
        }        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            if (!Processing)
            {
                TAG_Data = serialPort1.ReadExisting();
            }
        }
    }