---
order: 8
title:
zh-CN: 表单数据存储于上层组件
en-US: Store Form Data into Upper Component
---
## zh-CN
通过使用 `onFieldsChange` 与 `mapPropsToFields` ，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。
## 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 `mapPropsToFields` .
````jsx
import { Form, Input } from 'antd';
const FormItem = Form.Item;
const CustomizedForm = Form.create({
onFieldsChange(props, changedFields) {
props.onChange(changedFields);
},
mapPropsToFields(props) {
return {
username: {
...props.username,
value: props.username.value.toUpperCase(),
},
};
},
})((props) => {
const { getFieldDecorator } = props.form;
return (
< Form inline >
< FormItem label = "Username" >
{getFieldDecorator('username', {
rules: [{ required: true, message: 'Username is required!' }],
})(< Input / > )}
< / FormItem >
< / Form >
);
});
const Demo = React.createClass({
getInitialState() {
return {
fields: {
username: {
value: 'benjycui',
},
},
};
},
handleFormChange(changedFields) {
this.setState({
fields: { ...this.state.fields, ...changedFields },
});
},
render() {
const fields = this.state.fields;
return (
< div >
< CustomizedForm { . . . fields } onChange = {this.handleFormChange} / >
< 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 >
