在Backstage脚手架器上添加下拉控件（或单选按钮）可以使用Office UI Fabric提供的Dropdown组件或ChoiceGroup组件。

Dropdown组件示例代码：

import * as React from 'react'; import { Dropdown, IDropdownOption } from 'office-ui-fabric-react/lib/Dropdown';

const options: IDropdownOption[] = [ { key: 'A', text: 'Option A' }, { key: 'B', text: 'Option B' }, { key: 'C', text: 'Option C' }, { key: 'D', text: 'Option D' } ];

export const DropdownControl: React.FunctionComponent = () => { const [selectedOption, setSelectedOption] = React.useState(undefined);

const handleChange = (event: React.FormEvent, option?: IDropdownOption) => { setSelectedOption(option); };

return ( ); };

ChoiceGroup组件示例代码：

import * as React from 'react'; import { ChoiceGroup, IChoiceGroupOption } from 'office-ui-fabric-react/lib/ChoiceGroup';

const options: IChoiceGroupOption[] = [ { key: 'A', text: 'Option A' }, { key: 'B', text: 'Option B' }, { key: 'C', text: 'Option C' }, { key: 'D', text: 'Option D' } ];

export const RadioButtonsControl: React.FunctionComponent = () => { const [selectedOption, setSelectedOption] = React.useState(undefined);

const handleChange = (event: React.FormEvent, option?: IChoiceGroupOption) => { setSelectedOption(option ? option.key : undefined); };

return ( ); };