小编Zer*_*er0的帖子

我使用 Material-UI 和 React，有如下组件：

const UserDetail = (props: ListDetailProps) => {
    const oldpassword = useRef<TextFieldProps>(null);
    const newpassword = useRef<TextFieldProps>(null);
    const againpassword = useRef<TextFieldProps>(null);
    const handlePasswordChange = async () => {
        console.log(newpassword.current?.value)    //expect the password value but undefined get
        console.log(againpassword.current?.value)  //expect the password value but undefined get
    }
    return (<>
        <p>old password: <TextField ref={oldpassword} label="old password" type="password" /></p>
        <p>new password: <TextField ref={newpassword} label="new password" type="password" /></p>
        <p>new password: <TextField ref={againpassword} label="new password again" type="password" /></p>
        <button onClick={handlePasswordChange}>submit</button>
    </>
    )
}

我想获取 …

在其他语言中，例如 JavaScript，我可以使用：

const obj = { a: 5 };
obj["a"] //returns 5

如果 C# 中的名称以字符串形式给出，是否可以获取对象属性？我不想要一棵巨大的 if/else 树