import React, { useState } from 'react';

function MyComponent() {
  const [selectedValue, setSelectedValue] = useState('');

  // 其他组件代码...

  return (
    <div>
      <select onChange={(e) => setSelectedValue(e.target.value)}>
        <option value="option1">选项1</option>
        <option value="option2">选项2</option>
        <option value="option3">选项3</option>
      </select>
    </div>
  );
}

function handleButtonClick() {
  console.log(selectedValue);
}

// 其他组件代码...