string P_Chinese ="科";
byte[] P_bt_array =Encoding.Default.GetBytes(Chinese);
short front =(short)(P_bt_array[0]-'\0'); //將字節(jié)數(shù)組的第一位轉(zhuǎn)換成short類型
short back =(short)(P_bt_array[1]-'\0');  //將字節(jié)數(shù)組的第二位轉(zhuǎn)換成short類型
string P_Result =(front -160).ToString()+(back-160).ToString();

//漢字與區(qū)位碼的轉(zhuǎn)換
using System.Text;
 
namespace _037
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private TextBox? textBox2;
        private Button? button1;
        private TextBox? textBox1;
        private Label? label1;
 
        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // textBox2
            // 
            textBox2 = new TextBox
            {
                Location = new Point(102, 57),
                Name = "textBox2",
                Size = new Size(100, 23),
                TabIndex = 3
            };
            // 
            // button1
            // 
            button1 = new Button
            {
                Location = new Point(21, 57),
                Name = "button1",
                Size = new Size(75, 23),
                TabIndex = 2,
                Text = "轉(zhuǎn)區(qū)位碼",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // textBox1
            //             
            textBox1 = new TextBox
            {
                Location = new Point(102, 28),
                Name = "textBox1",
                Size = new Size(100, 23),
                TabIndex = 1
            };
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(21, 34),
                Name = "label1",
                Size = new Size(68, 17),
                TabIndex = 0,
                Text = "輸入漢字："
            };
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 12),
                Name = "groupBox1",
                Size = new Size(220, 102),
                TabIndex = 0,
                TabStop = false,
                Text = "漢字轉(zhuǎn)區(qū)位碼"
            };
            groupBox1.SuspendLayout();
            groupBox1.Controls.Add(textBox2);
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(label1);
          
            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(244, 126);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "漢字轉(zhuǎn)區(qū)位碼";          
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }
 
        private void Button1_Click(object? sender, EventArgs e)
        {
            if (textBox1!.Text != string.Empty) //判斷輸入是否為空
            {
                try
                {
                    textBox2!.Text =            //得到漢字區(qū)位碼信息
                        GetCode(textBox1.Text);
                }
                catch (IndexOutOfRangeException ex)
                {
                    MessageBox.Show(            //使用消息對話框提示異常信息
                        ex.Message + "請輸入正確的漢字", "出錯！");
                }
            }
            else
            {
                MessageBox.Show("請輸入正確的漢字", "提醒！");
            }
        }
        /// <summary>
        /// 得到漢字區(qū)位碼方法
        /// </summary>
        /// <param name="strChinese">漢字字符</param>
        /// <returns>返回漢字區(qū)位碼</returns>
        public static string GetCode(string Chinese)
        {
            byte[] byte_array = Encoding.Default.GetBytes(Chinese); //字符串轉(zhuǎn)Byte數(shù)組
            int front = (short)(byte_array[0] - '\0');              //將字節(jié)數(shù)組的第一位轉(zhuǎn)換成short類型
            int back = (short)(byte_array[1] - '\0');               //將字節(jié)數(shù)組的第二位轉(zhuǎn)換成short類型
            return (front - 160).ToString() + (back - 160).ToString();//計算并返回區(qū)位碼
        }
    }
}

 public virtual byte[] GetBytes(string s)
 {
     if (s == null)
     {
         throw new ArgumentNullException("s", Environment.GetResourceString("ArgumentNull_String"));
     }
 
     int byteCount = GetByteCount(s);
     byte[] array = new byte[byteCount];
     int bytes = GetBytes(s, 0, s.Length, array, 0);
     return array;
 }

//使用UTF-8的字符集，將字符串轉(zhuǎn)換為字節(jié)數(shù)組
byte[]utf8 =Encoding.UTF8.GetBytes(str);