Javascript ReactJs:从父URL获取数据并将其传递给子组件
我正在从reactjs中的表单发送表单数据。用户的一些预输入必须与表单一起发送。我从父文件的URL获取数据,表单位于子组件中 父url: http://localhost:3000/uploadlist?phmcy=2 我必须从URL获取phmcy值。(此处必须传递的数据为“2”) 父组件:Javascript ReactJs:从父URL获取数据并将其传递给子组件,javascript,reactjs,post,Javascript,Reactjs,Post,我正在从reactjs中的表单发送表单数据。用户的一些预输入必须与表单一起发送。我从父文件的URL获取数据,表单位于子组件中 父url: http://localhost:3000/uploadlist?phmcy=2 我必须从URL获取phmcy值。(此处必须传递的数据为“2”) 父组件: import Upload froimportm './Upload' import axios from "axios"; import { Link, withRouter } fr
import Upload froimportm './Upload'
import axios from "axios";
import { Link, withRouter } from "react-router-dom";
import { useLocation } from 'react-router';
export default function Uploadlist() {
let phmcy = (new URLSearchParams(window.location.search)).get("phmcy")
var myphmcy = JSON.stringify(phmcy);
//const phmcyvalue = new URLSearchParams(this.props.location.search);
//const phmcy = phmcyvalue.get('phmcy')
console.log(myphmcy);
const ordersAPI= (url='https://localhost:44357/api/Orders') => {
return {
fetchAll: () => axios.get(url),
create: newRecord => axios.post(url, newRecord),
update: (id, updateRecord) => axios.put(url + id, updateRecord),
delete: id => axios.delete(url+id)
}
}
const addOrEdit = (formData, onSuccess) => {
ordersAPI().create(formData)
.then(res => {
onSuccess();
})
.catch(err => console.log(err.response.data))
}
return (
<div className="row">
<div className="jumbotron jumbotron-fluid py-4 "></div>
<div className="container text">
<h1 className="display-4"> Order Register</h1>
</div>
<div className="col-md-4 offset-3">
<Upload
addOrEdit = {addOrEdit}
myphmcy = {myphmcy}
/>
</div>
<div className="col-md-1">
<div> </div>
</div>
</div>
)
}
import-Upload froimportm./Upload'
从“axios”导入axios;
从“react router dom”导入{Link,withRouter};
从“react router”导入{useLocation};
导出默认函数Uploadlist(){
让phmcy=(新的URLSearchParams(window.location.search)).get(“phmcy”)
var myphmcy=JSON.stringify(phmcy);
//const phmcyvalue=新的URLSearchParams(this.props.location.search);
//const phmcy=phmcyvalue.get('phmcy')
console.log(myphmcy);
常量ordersAPI=(url=)https://localhost:44357/api/Orders') => {
返回{
fetchAll:()=>axios.get(url),
create:newRecord=>axios.post(url,newRecord),
update:(id,updateRecord)=>axios.put(url+id,updateRecord),
delete:id=>axios.delete(url+id)
}
}
const addOrEdit=(formData,onSuccess)=>{
ordersAPI().create(formData)
。然后(res=>{
onSuccess();
})
.catch(err=>console.log(err.response.data))
}
返回(
订单登记簿
)
}
子组件:(这是表单所在的位置。我只包含了一部分)
import React,{useState,useffect}来自“React”;
从“/Uploadlist”导入myphmcy;
//const myphmcy=JSON.stringify(phmcy);
console.log(myphmcy);
const defaultImageSrc='/images/7.jpg';
常量初始字段值={
医嘱ID:0,
日期时间:“”,
状态:“”,
状态2:“”,
pharmacyName:“”,
客户名称:'',
患者姓名:'',
耐心地说:,
地址:'',
电子邮件:“”,
电话号码:'',
客户ID:1,
pharmacyId:myphmcy,//从URL获取的数据在发布时必须作为pharmacyId发布。
图像名称:“”,
imageSrc:“”,
图像文件:空
}
导出默认功能上传(道具){
常量{addOrEdit}=props
常量{myphmcy}=props
const[values,setValues]=useState(initialFieldValues)
const[errors,setErrors]=useState({})
常量handleInputChange=e=>{
常量{name,value}=e.target;
设定值({
价值观
[名称]:值
})
}
const showPreview=e=>{
if(e.target.files&&e.target.files[0]){
设imageFile=e.target.files[0];
const reader=new FileReader();
reader.onload=x=>{
设定值({
价值观
图像文件,
imageSrc:x.target.result
})
}
reader.readAsDataURL(图像文件)
}
否则{
设定值({
价值观
imageFile:null,
imageSrc:'
})
}
}
常量验证=()=>{
设temp={}
temp.customerName=values.customerName==“”?false:true;
设置错误(临时)
返回Object.values(temp.every)(x=>x==true)
}
常量重置形式=()=>{
setValues(initialFieldValues)
document.getElementById('image-uploader')。值=null;
}
常量handleFormSubmit=e=>{
e、 预防默认值()
if(validate()){
const formData=new formData()
formData.append('orderId',values.orderId)
formData.append('dateTime',values.dateTime)
formData.append('status',values.status)
formData.append('status2',values.status2)
formData.append('pharmacyName',values.pharmacyName)
formData.append('customerName',values.customerName)
formData.append('patientName',values.patientName)
formData.append('patientAge',values.patientAge)
formData.append('address',values.address)
formData.append('email',values.email)
formData.append('teleNo',values.teleNo)
formData.append('customerId',values.customerId)
formData.append('pharmacyId',values.pharmacyId)
formData.append('imageName',values.imageName)
formData.append('imageFile',values.imageFile)
addOrEdit(formData,resetForm)
警报(“正在上载您的文件!”)
}
}
const applyErrorClass=field=>((错误中的字段和错误[field]==false)?“无效字段”:“”
返回(
在这里下单
提交
)
}
这不太好用,我也没办法
import React, {useState, useEffect} from 'react';
import myphmcy from './Uploadlist';
//const myphmcy = JSON.stringify(phmcy);
console.log(myphmcy);
const defaultImageSrc = '/images/7.jpg';
const initialFieldValues ={
orderId:0,
dateTime:'',
status:'',
status2:'',
pharmacyName:'',
customerName:'',
patientName:'',
patientAge:'',
address:'',
email:'',
teleNo:'',
customerId:1,
pharmacyId:myphmcy,//data obtaind from the URL have to posted as the pharmacyID when posting.
imageName:'',
imageSrc:'',
imageFile: null
}
export default function Upload(props) {
const {addOrEdit} = props
const {myphmcy} = props
const [values, setValues] = useState(initialFieldValues)
const[errors, setErrors] = useState({})
const handleInputChange= e => {
const {name, value} = e.target;
setValues({
...values,
[name]:value
})
}
const showPreview = e => {
if(e.target.files && e.target.files[0]){
let imageFile = e.target.files[0];
const reader = new FileReader();
reader.onload = x => {
setValues({
...values,
imageFile,
imageSrc : x.target.result
})
}
reader.readAsDataURL(imageFile)
}
else{
setValues({
...values,
imageFile:null,
imageSrc:''
})
}
}
const validate = () => {
let temp = {}
temp.customerName = values.customerName == "" ? false : true;
setErrors(temp)
return Object.values(temp).every(x => x == true)
}
const resetForm = () => {
setValues(initialFieldValues)
document.getElementById('image-uploader').value = null;
}
const handleFormSubmit = e => {
e.preventDefault()
if (validate()){
const formData = new FormData()
formData.append('orderId',values.orderId)
formData.append('dateTime',values.dateTime)
formData.append('status',values.status)
formData.append('status2',values.status2)
formData.append('pharmacyName',values.pharmacyName)
formData.append('customerName',values.customerName)
formData.append('patientName',values.patientName)
formData.append('patientAge',values.patientAge)
formData.append('address',values.address)
formData.append('email',values.email)
formData.append('teleNo',values.teleNo)
formData.append('customerId',values.customerId)
formData.append('pharmacyId',values.pharmacyId)
formData.append('imageName',values.imageName)
formData.append('imageFile',values.imageFile)
addOrEdit(formData, resetForm)
alert("Your file is being uploaded!")
}
}
const applyErrorClass = field => ((field in errors && errors[field] == false) ? ' invalid-field' : '')
return (
<>
<div className="container text-center ">
<p className="lead"></p>
</div>
<form autoComplete="off" noValidate onSubmit={handleFormSubmit}>
<div className="card">
<div className="card-header text-center">Place Your Order Here</div>
<img src={values.imageSrc} className="card-img-top"/>
<div className="card-body">
<div className="form-group">
<input type="file" accept="image/*" className="form-control-file" onChange={showPreview} id="image-uploader"/>
</div>
<div className="form-group">
<input type="datetime-local" className="form-control" placeholder="Date Time" name="dateTime" value={values.dateTime}
onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Enter the prescription items and qty" name="status" value={values.status} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="What are the symptoms?" name="status2" value={values.status2} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Pharmacy Name" name="pharmacyName" value={values.pharmacyName} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className={"form-control" + applyErrorClass('customerName')} placeholder="Your Name" name="customerName" value={values.customerName} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Patient Name" name="patientName" value={values.patientName} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Patient Age" name="patientAge" value={values.patientAge} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Delivery address" name="address" value={values.address} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Your Email" name="email" value={values.email} onChange={ handleInputChange}/>
</div>
<div className="form-group">
<input className="form-control" placeholder="Contact Number" name="teleNo" value={values.teleNo} onChange={ handleInputChange}/>
</div>
<div className="form-group text-center">
<button type="submit" className="btn btn-light">submit</button>
</div>
</div>
</div>
</form>
</>
)
}
const handleFormSubmit = e => {
e.preventDefault();
if (validate()) {
const formData = new FormData();
formData.append('orderId', values.orderId);
formData.append('dateTime', values.dateTime);
formData.append('status', values.status);
formData.append('status2', values.status2);
formData.append('pharmacyName', values.pharmacyName);
formData.append('customerName', values.customerName);
formData.append('patientName', values.patientName);
formData.append('patientAge', values.patientAge);
formData.append('address', values.address);
formData.append('email', values.email);
formData.append('teleNo', values.teleNo);
formData.append('customerId', values.customerId);
formData.append('pharmacyId', myphmcy) // <-- use the prop directly
formData.append('imageName', values.imageName);
formData.append('imageFile', values.imageFile);
addOrEdit(formData, resetForm) ;
alert("Your file is being uploaded!");
};