【发布时间】：2020-01-26 00:25:05
【问题描述】：
我创建了一个链接到 reactJs 前端的用户 CRUD api。我一直在使用引导组件并决定使用模态组件来编辑表单。唯一的问题是，由于某种原因，当模式打开时，除非我重新加载浏览器，否则我无法再次退出。
EditUserModal.js 的代码如下：
import React, { Component } from 'react';
import {Modal, Button, Row, Col, Form} from 'react-bootstrap';
import * as moment from 'moment';
const BASE_API_URL = `http://localhost:56062/api/users`;
var currentDate = new Date();
export class EditUserModal extends Component{
constructor(props){
super(props);
this.handleSubmit = this.handleSubmit.bind(this);
}
componentDidMount(){
}
handleSubmit(event){
event.preventDefault();
fetch(BASE_API_URL,{
method:'PUT',
headers:{
'Accept':'application/json',
'Content-Type':'application/json'
},
body:JSON.stringify({
Id: event.target.Id.value,
firstName: event.target.firstName.value,
lastName: event.target.lastName.value,
Email: event.target.Email.value,
mobileNumber: event.target.mobileNumber.value,
dateOfBirth: event.target.dateOfBirth.value,
lastModified: currentDate
})
})
.then(res=> res.json())
.then((result) =>
{
console.log(result);
},
(error) => {
console.log('Failed')
}
)
}
render(){
return(
<Modal
{...this.props}
size="lg"
aria-labelledby="contained-modal-title-vcenter"
centered
>
<Modal.Header closeButton>
<Modal.Title id="contained-modal-title-vcenter">
Edit User
</Modal.Title>
</Modal.Header>
<Modal.Body>
<div className="editFormContainer">
<Row>
<Col sm={12}>
<Form onSubmit={this.handleSubmit}>
<Form.Group controlId="Id">
<Form.Label>User ID</Form.Label>
<Form.Control name="Id" disabled defaultValue = {this.props.userid} type="text" placeholder="Id" />
</Form.Group>
<Form.Group controlId="firstName">
<Form.Label>First Name</Form.Label>
<Form.Control name="firstName" required type="text" defaultValue = {this.props.firstname} placeholder="First Name" />
</Form.Group>
<Form.Group controlId="lastName">
<Form.Label>Last Name</Form.Label>
<Form.Control name="lastName" required type="text" defaultValue = {this.props.lastname} placeholder="Last Name" />
</Form.Group>
<Form.Group controlId="Email">
<Form.Label>Email address</Form.Label>
<Form.Control name="Email" required type="email" defaultValue = {this.props.useremail} placeholder="Email e.g. name@example.com" />
</Form.Group>
<Form.Group controlId="mobileNumber">
<Form.Label>Mobile Number</Form.Label>
<Form.Control name="mobileNumber" required type="text" defaultValue = {this.props.mobilenumber} placeholder="Mobile e.g. 0723218223 or +447236475886" />
</Form.Group>
<Form.Group controlId="dateOfBirth">
<Form.Label>Date of Birth</Form.Label>
<Form.Control name="dateOfBirth" required type="date" defaultValue = {moment(new Date(this.props.dateofbirth)).format('YYYY-MM-DD')} placeholder="Date of Birth e.g. 05-02-97" />
</Form.Group>
<Form.Group>
<Button variant="primary" type="submit">Edit User</Button>
</Form.Group>
</Form>
</Col>
</Row>
</div>
</Modal.Body>
<Modal.Footer>
<Button variant="danger" onClick={this.props.onHide}>Close</Button>
</Modal.Footer>
</Modal>
)
}
}
然后对于使用modal的页面，相关代码如下：
export class User extends Component {
constructor(props){
super(props);
this.state = {users:[], addModalShow : false, editModalShow: false}
}
render(){
const {users, userid, firstname, lastname, useremail, mobilenumber, dateofbirth, lastmodified} = this.state;
let addModalClose =() => this.setState({addModalShow:false});
let editModalClose =() => this.setState({editModalShow:false});
return(
<div>
<ButtonToolbar>
<Button variant='outline-dark' style={{margin:"auto"}} onClick={()=> this.setState({addModalShow:true})}>
Add User
</Button>
<AddUserModal show={this.state.addModalShow} onHide={addModalClose} />
</ButtonToolbar>
<Table responsive borderless style={{borderRadius:"0.3em"}} striped hover size="sm" variant="dark" className="mt-4">
<thead>
<tr>
<th>Id</th>
<th>First Name</th>
<th>Last Name</th>
<th>Email</th>
<th>Mobile Number</th>
<th>Date of Birth</th>
<th>Last Modified</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
{users.map(user=>
<tr key = {user.Id}>
<td>{user.Id}</td>
<td>{user.firstName}</td>
<td>{user.lastName}</td>
<td>{user.Email}</td>
<td>{user.mobileNumber}</td>
<td>{moment(new Date(user.dateOfBirth)).format('YYYY-MM-DD')}</td>
<td>{user.lastModified}</td>
<td>
<ButtonToolbar>
<Button className="mr-2" variant="outline-light" onClick={()=> { ReactDOM.render(<EditUserModal show={true} userid={user.Id} firstname={user.firstName}
lastname={user.lastName} useremail={user.Email} mobilenumber={user.mobileNumber} dateofbirth={user.dateOfBirth} onHide = {editModalClose} /> , document.getElementById('root')) }}>
Edit User
</Button>
</ButtonToolbar>
</td>
<td>
<Button variant="outline-danger" onClick={()=> this.deleteUser(user.Id)} >Delete</Button>
</td>
</tr>
)}
</tbody>
</Table>
</div>
)
}
}
为什么模态没有正确退出？或者我可以用什么方法使这成为可能？单击关闭模式、取消或 X 按钮似乎不会关闭模式。
========================编辑======================= ================
我意识到，当模态处于该状态时，我提交了编辑表单，控制台会显示来自该代码块的“失败”消息，即使当我刷新页面时，它也成功加载了新的编辑信息.
handleSubmit(event){
event.preventDefault();
fetch(BASE_API_URL,{
method:'PUT',
headers:{
'Accept':'application/json',
'Content-Type':'application/json'
},
body:JSON.stringify({
Id: event.target.Id.value,
firstName: event.target.firstName.value,
lastName: event.target.lastName.value,
Email: event.target.Email.value,
mobileNumber: event.target.mobileNumber.value,
dateOfBirth: event.target.dateOfBirth.value,
lastModified: currentDate
})
})
.then(res=> res.json())
.then((result) =>
{
console.log(result);
},
(error) => {
console.log('Failed')
}
)
}
【问题讨论】：
-
你总是通过 show={true}。你不应该传递 editModalShow 属性而不是 {true} 吗？
-
当我这样做时，单击模态按钮后我只会得到一个白屏。 @G_S
-
另外，我现在的方式基本上也给出了白屏，但至少显示了模态形式。但我就是无法退出。
-
白屏时控制台出现任何错误？
-
@G_S 它说：警告：无法对未安装的组件执行 React 状态更新
标签： javascript reactjs bootstrap-modal react-bootstrap