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

---
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` 和 `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
import React, { useState } from 'react';
import { Form, Input } from 'antd';

interface FieldData {
  name: string[];
  value: any;
  touched: boolean;
  validating: boolean;
  errors: string[];
}

interface CustomizedFormProps {
  onChange: (fields: FieldData[]) => void;
  fields: FieldData[];
}

const CustomizedForm: React.FC<CustomizedFormProps> = ({ onChange, fields }) => {
  return (
    <Form
      name="global_state"
      layout="inline"
      fields={fields}
      onFieldsChange={(changedFields, 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([{ name: ['username'], value: 'Ant Design' }]);

  return (
    <div>
      <CustomizedForm
        fields={fields}
        onChange={newFields => {
          setFields(newFields);
        }}
      />
      <pre className="language-bash">{JSON.stringify(fields, null, 2)}</pre>
    </div>
  );
};

ReactDOM.render(<Demo />, mountNode);
```

<style>
#components-form-demo-global-state .language-bash {
  max-width: 400px;
  border-radius: 6px;
  margin-top: 24px;
}
</style>