C#使用移位运算符获取汉字编码的示例代码

using System.Text;
 
namespace _019
{
    public partial class Form1 : Form
    {
        private Label? label1;
        private TextBox? textBox1;
        private TextBox? textBox2;
        private Button? button1;
     
        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {          
            // 
            // txt_Num
            // 
            textBox2 = new TextBox
            {
                Location = new Point(146, 52),
                Name = "txt_Num",
                Size = new Size(100, 21),
                TabIndex = 7
            };
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(24, 19),
                Name = "label1",
                Size = new Size(113, 12),
                TabIndex = 6,
                Text = "输入一个汉字字符："
            };
            // 
            // txt_chr
            // 
            textBox1 = new TextBox
            {
                Location = new Point(146, 14),
                Name = "txt_chr",
                Size = new Size(100, 21),
                TabIndex = 5
            };
            // 
            // btn_Get
            // 
            button1 = new Button
            {
                Location = new Point(26, 50),
                Name = "btn_Get",
                Size = new Size(100, 23),
                TabIndex = 4,
                Text = "获取汉字编码值",
                UseVisualStyleBackColor = true
            };
            button1.Click += new EventHandler(Button1_Click);
            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(6F, 12F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(269, 89);
            Controls.Add(textBox2);
            Controls.Add(label1);
            Controls.Add(textBox1);
            Controls.Add(button1);
            Name = "Form1";
            Text = "获取汉字编码值";
            SuspendLayout();
        }
 
        /// <summary>
        /// GB2312并不是VS默认支持的编码，需要安装编码库。
        /// </summary>
        private void Button1_Click(object? sender, EventArgs e)
        {
            try
            {
                Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
                /*char chr = textBox1!.Text.ToCharArray()[0]; *///获取文本框中位置为1的汉字
                char chr = textBox1!.Text[0];     //等效语句
                char[] chars = [chr];
                byte[] bytes = Encoding.GetEncoding("gb2312").GetBytes(chars: [chr]);   //使用gb2312编码方式获得字节序列               
                int n = bytes[0] << 8;           //将字节序列的第一个字节向左移8位
                n += bytes[1];                   //第一个字节移8位后与第二个字节相加得到汉字编码
                textBox2!.Text = n.ToString();   //显示汉字编码
            }
            catch (Exception)
            {
                MessageBox.Show("请输入汉字字符！", "出现错误！");
            }
        }
    }
}