Javascript m“反应”; 从“react bootstrap”导入{Alert、Form、Col、Row、Button、Card}; 从“/EmployeeForm”导入EmployeeForm; 从“/services/EmployeeService”导入EmployeeService; 导出默认类CreateEmployee扩展React.Component{ 构造函数(){ 超级(); this.employeeService=新的employeeService(); 此.state={ 雇员:{ 名字:“, 姓氏:“, 出生日期:“, 被雇佣者:“, 性别:“ } }; } //在这里创建handleChange并将其作为道具传递给EmployeeForm //使用setState而不是mutate handleChange=e=>{ this.setState({employee:{[e.target.id]:e.target.value}) }; 保存=()=>{ console.log(this.state.values); 这是雇员服务 .createEmployee(this.state.values) 。然后(结果=>{ this.setState({error:null}); }) .catch(错误=>{ 控制台日志(err); this.setState({error:err}); }); }; render(){ log(“reder:,this.state.employee”); 返回( 雇员 创建员工 创造 ); } }
注意:我只修复了这个问题所要求的错误-您可能仍然需要重构代码的某些部分。不要忘记不要直接改变状态。你正在改变状态:Javascript m“反应”; 从“react bootstrap”导入{Alert、Form、Col、Row、Button、Card}; 从“/EmployeeForm”导入EmployeeForm; 从“/services/EmployeeService”导入EmployeeService; 导出默认类CreateEmployee扩展React.Component{ 构造函数(){ 超级(); this.employeeService=新的employeeService(); 此.state={ 雇员:{ 名字:“, 姓氏:“, 出生日期:“, 被雇佣者:“, 性别:“ } }; } //在这里创建handleChange并将其作为道具传递给EmployeeForm //使用setState而不是mutate handleChange=e=>{ this.setState({employee:{[e.target.id]:e.target.value}) }; 保存=()=>{ console.log(this.state.values); 这是雇员服务 .createEmployee(this.state.values) 。然后(结果=>{ this.setState({error:null}); }) .catch(错误=>{ 控制台日志(err); this.setState({error:err}); }); }; render(){ log(“reder:,this.state.employee”); 返回( 雇员 创建员工 创造 ); } },javascript,reactjs,Javascript,Reactjs,注意:我只修复了这个问题所要求的错误-您可能仍然需要重构代码的某些部分。不要忘记不要直接改变状态。你正在改变状态:this.props.employee[e.target.id]=e.target.value将一个更改函数从父级传递到子级,该函数执行设置状态而不发生变化。谢谢,这是实际的子级到父级通信。一旦用户在子窗体中输入了所有数据,我想将其传输到父窗体。谢谢,handleChange()帮助解决了这个问题。 import React, { Component } from "reac
this.props.employee[e.target.id]=e.target.value代码>将一个更改函数从父级传递到子级,该函数执行设置状态而不发生变化。谢谢,这是实际的子级到父级通信。一旦用户在子窗体中输入了所有数据,我想将其传输到父窗体。谢谢,handleChange()帮助解决了这个问题。
import React, { Component } from "react";
import { Form } from "react-bootstrap";
export default class EmployeeForm extends Component {
constructor(props) {
super(props);
console.log("this.props.employee ", this.props.employee);
}
/** Generic handle change events for all fields */
handleChange = e => {
this.props.employee[e.target.id] = e.target.value;
console.log(e.target.value);
};
// handleChange = (key, e) => {
// e.preventDefault();
// console.log(key);
// console.log(e.target.value);
// this.props.employee[key] = e.target.value;
// };
render() {
const { employee } = this.props;
console.log("ef render ", employee.firstName);
return (
<div>
<Form.Group controlId="firstName">
<Form.Label>First name</Form.Label>
<Form.Control
type="text"
value={employee.firstName}
onChange={this.handleChange}
placeholder="Enter first name"
/>
</Form.Group>
<Form.Group controlId="lastname">
<Form.Label>Last name</Form.Label>
<Form.Control
type="text"
value={employee.lastName}
onChange={this.handleChange}
placeholder="Enter last name"
/>
</Form.Group>
<Form.Group controlId="birthDate">
<Form.Label>Date of birth</Form.Label>
<Form.Control
type="date"
value={employee.birthDate}
onChange={this.handleChange}
/>
</Form.Group>
<Form.Group controlId="hireDate">
<Form.Label>Date of hire</Form.Label>
<Form.Control
type="date"
value={employee.hireDate}
onChange={this.handleChange}
/>
</Form.Group>
<Form.Group controlId="gender">
<Form.Label>Gender</Form.Label>
<Form.Control
as="select"
value={employee.gender}
onChange={this.handleChange}
>
<option value="">Please select</option>
<option value="F">Female</option>
<option value="M">Male</option>
</Form.Control>
</Form.Group>
</div>
);
}
}
import React from "react";
import { Alert, Form, Col, Row, Button, Card } from "react-bootstrap";
import EmployeeForm from "./EmployeeForm";
import EmployeeService from "./services/EmployeeService";
export default class CreateEmployee extends React.Component {
constructor() {
super();
this.employeeService = new EmployeeService();
this.state = {
employee: {
firstName: "",
lastName: "",
birthDate: "",
hireDate: "",
gender: ""
}
};
}
save = () => {
console.log(this.state.values);
this.employeeService
.createEmployee(this.state.values)
.then(result => {
this.setState({ error: null });
})
.catch(err => {
console.log(err);
this.setState({ error: err });
});
};
render() {
console.log("reder : ", this.state.employee);
return (
<div>
<Form>
<Alert variant="primary">Employee</Alert>
<Card style={{ width: "500px" }}>
<Card.Header>Create Employee</Card.Header>
<Card.Body>
<EmployeeForm employee={this.state.employee} />
<Row>
<Col>
<Button variant="primary" type="button" onClick={this.save}>
Create
</Button>
</Col>
</Row>
</Card.Body>
</Card>
</Form>
</div>
);
}
}
export default class Parent extends React.Component {
constructor(props) {
super(props);
this.state = {
employee: {
firstName: '',
lastName: '',
birthDate: '',
hireDate: '',
gender: '',
},
};
}
inputs = ['lastName'];
render() {
return (
<div>
{this.inputs.map(key => (
<Child
key={key}
//value from this.state
value={this.state.employee[key]}
//will set this.state with value passed
change={val =>
this.setState({
...this.state,
employee: {
...this.state.employee,
[key]: val,
},
})
}
/>
))}
</div>
);
}
}
const Child = ({ change, value }) => {
const onChange e => change(e.target.value);
return (
<input type="text" onChange={onChange} value={value} />
);
};
import React from "react";
import { Alert, Form, Col, Row, Button, Card } from "react-bootstrap";
import EmployeeForm from "./EmployeeForm";
import EmployeeService from "./services/EmployeeService";
export default class CreateEmployee extends React.Component {
constructor() {
super();
this.employeeService = new EmployeeService();
this.state = {
employee: {
firstName: "",
lastName: "",
birthDate: "",
hireDate: "",
gender: ""
}
};
}
// Create handleChange here and pass it to EmployeeForm as props
// Use setState instead of mutating state
handleChange = e => {
this.setState({employee: {[e.target.id]: e.target.value}})
};
save = () => {
console.log(this.state.values);
this.employeeService
.createEmployee(this.state.values)
.then(result => {
this.setState({ error: null });
})
.catch(err => {
console.log(err);
this.setState({ error: err });
});
};
render() {
console.log("reder : ", this.state.employee);
return (
<div>
<Form>
<Alert variant="primary">Employee</Alert>
<Card style={{ width: "500px" }}>
<Card.Header>Create Employee</Card.Header>
<Card.Body>
<EmployeeForm handleChange={this.handleChange} employee={this.state.employee} />
<Row>
<Col>
<Button variant="primary" type="button" onClick={this.save}>
Create
</Button>
</Col>
</Row>
</Card.Body>
</Card>
</Form>
</div>
);
}
}