ant-design/components/form/demo/global-state.md

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---
order: 7
title:
zh-CN: 表单数据存储于上层组件
en-US: Store Form Data into Upper Component
---
## zh-CN
通过 `onFieldsChange``fields`,可以把表单的数据存储到上层组件或者 [Redux](https://github.com/reactjs/redux)、[dva](https://github.com/dvajs/dva) 中,更多可参考 [rc-field-form 示例](https://rc-field-form.react-component.now.sh/?selectedKind=rc-field-form&selectedStory=StateForm-redux&full=0&addons=1&stories=1&panelRight=0&addonPanel=storybook%2Factions%2Factions-panel)。
**注意:** 将表单数据存储于外部容器[并非好的实践](https://github.com/reduxjs/redux/issues/1287#issuecomment-175351978),如无必要请避免使用。
## en-US
We can store form data into upper component or [Redux](https://github.com/reactjs/redux) or [dva](https://github.com/dvajs/dva) by using `onFieldsChange` and `fields`, see more at this [rc-field-form demo](https://rc-field-form.react-component.now.sh/?selectedKind=rc-field-form&selectedStory=StateForm-redux&full=0&addons=1&stories=1&panelRight=0&addonPanel=storybook%2Factions%2Factions-panel).
**Note:** Save Form data globally [is not a good practice](https://github.com/reduxjs/redux/issues/1287#issuecomment-175351978). You should avoid this if not necessary.
```tsx
2020-01-22 12:11:49 +08:00
import React, { useState } from 'react';
import { Form, Input } from 'antd';
interface FieldData {
name: string | number | (string | number)[];
value?: any;
touched?: boolean;
validating?: boolean;
errors?: string[];
}
interface CustomizedFormProps {
onChange: (fields: FieldData[]) => void;
fields: FieldData[];
}
const CustomizedForm: React.FC<CustomizedFormProps> = ({ onChange, fields }) => (
<Form
name="global_state"
layout="inline"
fields={fields}
onFieldsChange={(_, allFields) => {
onChange(allFields);
}}
>
<Form.Item
name="username"
label="Username"
rules={[{ required: true, message: 'Username is required!' }]}
>
<Input />
</Form.Item>
</Form>
);
const Demo = () => {
const [fields, setFields] = useState<FieldData[]>([{ name: ['username'], value: 'Ant Design' }]);
return (
<>
<CustomizedForm
fields={fields}
onChange={newFields => {
setFields(newFields);
}}
/>
<pre className="language-bash">{JSON.stringify(fields, null, 2)}</pre>
</>
);
};
ReactDOM.render(<Demo />, mountNode);
```
<style>
#components-form-demo-global-state .language-bash {
max-width: 400px;
border-radius: 6px;
margin-top: 24px;
}
</style>