[Vue3:组件通信)子组件props接收和watch监听,emit发送父组件 (添加修改设置成绩,添加、删除选课记录)
文章目录
一:系统功能:设置成绩(添加或修改)
交互逻辑:涉及页面 Page02.vue,ModalEdit.vue
点击成绩修改按钮弹出 成绩修改页面,展示分数并可设置分数
点击提交发送请求/api/baseStudentCourse/updata
成功则返回上一页面进行刷新数据发送请求/api/baseStudentCourse/list
主页面Page.vue注入子页面,使用子页面标签属性
<el-table-column label="操作" width="380">
<template #default="{ row, $index }">
<el-button size="mini" type="warning" @click="editItem(row, $index)" @updateData="handleData" >成绩修改</el-button>
<el-button size="mini" type="warning" @click="addItem(row, $index)" @updateData="handleData" >成绩添加</el-button>
<el-button size="mini" type="danger" @click="handleDeleteCourse(row, $index)" @updateData="handleData" >删除选课</el-button>
</template>
</el-table-column>
</el-table>
<ModalEdit v-model:visible="showModal" :edit-data="editData" :show-flag = "showFlag" @refreshData="refreshData" />
<ModalCourseAdd v-model:visible="showModalAddCourse" @refreshData="refreshData" />
<script setup>
import { useRouter } from 'vue-router';
import {onMounted, ref} from 'vue';
import axios from "axios";
import ModalEdit from "./ModalEdit.vue";
import ModalCourseAdd from "./ModalCourseAdd.vue";
const showModal = ref(false);
const showModalAddCourse = ref(false);
const editData = ref(null);
const showFlag = ref(String);
主页面对子页面做通信,子页面ModalEdit接收参数和监听时间涉及到组件props,watch
子页面ModalEdit通过props属性接收控制属性
在 Vue.js 中,props 用于接收来自父组件的数据。这里定义了三个属性(props):visible、editData 和 showFlag。我将逐一分析这些属性
父页面Page当点击add或edit, 设置这个showModal.value属性为true(v-model:visible=“showModal”),这里showModal,并给editData赋值
在 Vue 3 中,v-model 可以绑定到组件的任意 prop 上,这里它绑定了 showModal 数据属性,这意味着 showModal 的值将与 ModalEdit 组件内部的 visible 状态保持同步。当 ModalEdit 组件的 visible 状态改变时,它会更新父组件的 showModal 数据属性,反之亦然。
:show-flag=“showFlag”: 类似地,这也是一个动态 prop 绑定,将父组件中的 showFlag 数据传递给 ModalEdit 组件。showFlag 可能用于控制模态框中某些元素的显示或隐藏。
const editItem = (item, index) => {
editData.value = item;
showModal.value = true; // v-model:visible="showModal"
showFlag.value = '成绩修改';
};
const addItem = (item, index) => {
editData.value = item;
showModal.value = true;
showFlag.value = '成绩添加';
};
watch是vue组件的一个选项,这里是用来监视visible这个数据属性的变化;
父页面visible属性默认是false
<ModalEdit v-model:visible="showModal" :edit-data="editData" :show-flag = "showFlag" @refreshData="refreshData" />
const showModal = ref(false);
父页面点击操作visible设置true,子页面同时watch监听visible发生变化,editData展示和渲染默认成绩数据,visible 为true展示页面(默认隐藏)
watch: {
visible() {
this.formData.id = this.editData.id; // 初始化id字段
this.formData.score = this.editData.score;
// this.formData.score = this.editData.score;
}
},
props: {
visible: {
type: Boolean,
required: true
},
editData: {
type: Object,
default: () => ({})
},
showFlag: {
type: Object,
default: () => ({})
}
},
子页面ModalEdit向父页面传递参数
这部分定义了该组件可能向父组件发出的三个自定义事件:
update:visible:通常用于更新一个名为 visible 的 prop 的值,这是 Vue 的 .sync 修饰符常用的模式。
submit:可能是当表单数据被提交时触发的事件。
refreshData:可能是当数据更新后,通知父组件刷新或重新获取数据的事件。
这里主要用了refreshData事件:当子页面更新成功后通知父组件事件函数(重新请求刷新数据)
ModalEdit
子页面:
this.$emit('refreshData', { // 假设服务器返回了更新后的数据,或者你可以传递更新后的id和score
success: true,
message: resp.data.message,
});
父页面:
<template>
<ModalEdit v-model:visible="showModal" :edit-data="editData" :show-flag = "showFlag" @refreshData="refreshData" />
</template>
<script setup>
// 成绩修改
const refreshData = () => {
axios.post("/api/baseStudentCourse/list", {
id: localStorage.getItem('id')}).then(resp => {
if (resp.data.code === 200) {
tableData.value = resp.data.data
} else {
alert(resp.data.message);
}
})
showModal.value = false;
showModalAddCourse.value = false;
} ;
</script>
emits: ['update:visible', 'submit', 'refreshData'],
methods: {
handleSubmit() {
// 确保发送完整对象,包含id字段
this.$emit('submit', { ...this.formData });
},
closeModal() {
this.$emit('update:visible', false);
},
// 成绩录入/修改
submit () {
debugger
console.log(this.formData)
// 编辑逻辑
const response = axios.post("/api/baseStudentCourse/update", {
id: this.formData.id,
score: this.formData.score
}).then(resp => {
if (resp.data.code === 200) {
alert(resp.data.message);
// 发送一个事件给父组件,表示数据已更新
this.$emit('refreshData', { // 假设服务器返回了更新后的数据,或者你可以传递更新后的id和score
success: true,
message: resp.data.message,
});
} else {
alert(resp.data.message);
}
})
}
}
二:系统功能:添加选课
父组件与子组件交互和上述设置成绩交互逻辑一致,
主要是多了进入子页面展示下拉列表:v-for,
<form @submit.prevent="handleSubmit">
<label>
选择学生:
<select v-model="formData.student">
<option v-for="student in students" :key="student.id" :value="student.id">
{{ student.name }}
</option>
</select>
</label>
<label>
选择课程:
<select v-model="formData.course">
<option v-for="course in courses" :key="course.id" :value="course.id">
{{ course.name }}
</option>
</select>
</label>
<!-- 其他需要编辑的字段也可以在这里添加 -->
<button type="submit" @click="submit">提交</button>
<button @click="closeModal">取消</button>
</form>
<script>
import axios from "axios";
export default {
props: {
visible: {
type: Boolean,
required: true
},
showFlag: {
type: Object,
default: () => ({})
}
},
emits: ['update:visible', 'submit', 'refreshData'],
data() {
return {
formData: {
id: null, // 添加id字段
score: null
}
};
},
created () {
axios.post("/api/student/list", {}).then(res => {
if (res.data.code === 200) {
debugger
this.students = res.data.data
}
})
axios.post("/api/course/list", {}).then(resp => {
if (resp.data.code === 200) {
debugger
this.courses = resp.data.data
}
})
console.log("准备输出课程和学生信息")
console.log(this.courses)
console.log(this.students)
},
methods: {
closeModal() {
this.$emit('update:visible', false);
},
// 成绩录入/修改
submit() {
console.log(this.formData)
// 编辑逻辑
axios.post("/api/baseStudentCourse/save", {
studentId: this.formData.student,
courseId: this.formData.course,
teacherId: localStorage.getItem('id')
}).then(resp => {
三:系统功能:删除选课
直接删除当前行数据
// 删除选课
const handleDeleteCourse = (row, index) => {
console.log(row)
axios.post("/api/baseStudentCourse/delete", {
id: row.id
}).then(resp => {
if (resp.data.code === 200) {
alert(resp.data.message);
axios.post("/api/baseStudentCourse/list", {
id: localStorage.getItem('id')}).then(resp => {
if (resp.data.code === 200) {
tableData.value = resp.data.data
} else {
alert(resp.data.message);
}
})
} else {
alert(resp.data.message);
}
})
};
四:相关页面完整代码
Page02.vue
<template>
<div class="container">
<div class="title-container" style="margin-top: 20px;">
<h3 class="title">学生管理平台</h3>
</div>
<div class="user-info">
<div class="buttons">
<el-button size="mini" class="user-button primary" @click="handleAddCourse()" :closeCourseModal = "closeModal">添加选课</el-button>
            
            
            
            
<span><b>当前用户:</b></span>{{currentUser}}
<el-button size="mini" class="user-button" @click="resetUser()">注销当前用户</el-button>
</div>
<!-- <h5 class="user-name">当前登录用户:{{ localStorageValue }}</h5>-->
</div>
<el-table :data="tableData">
<el-table-column prop="id" label="编码" width="100"></el-table-column>
<el-table-column prop="studentId" label="学号" width="100"></el-table-column>
<el-table-column prop="studentName" label="学生" width="100"></el-table-column>
<el-table-column prop="courseName" label="课程" width="180"></el-table-column>
<el-table-column prop="majorName" label="专业" width="100"></el-table-column>
<el-table-column prop="score" label="分数" width="100"></el-table-column>
<el-table-column prop="teacherName" label="教师" width="100"></el-table-column>
<el-table-column label="操作" width="380">
<template #default="{ row, $index }">
<el-button size="mini" type="warning" @click="editItem(row, $index)" @updateData="handleData" >成绩修改</el-button>
<el-button size="mini" type="warning" @click="addItem(row, $index)" @updateData="handleData" >成绩添加</el-button>
<el-button size="mini" type="danger" @click="handleDeleteCourse(row, $index)" @updateData="handleData" >删除选课</el-button>
</template>
</el-table-column>
</el-table>
<ModalEdit v-model:visible="showModal" :edit-data="editData" :show-flag = "showFlag" @refreshData="refreshData" />
<ModalCourseAdd v-model:visible="showModalAddCourse" @refreshData="refreshData" />
</div>
</template>
<script setup>
import { useRouter } from 'vue-router';
import {onMounted, ref} from 'vue';
import axios from "axios";
import ModalEdit from "./ModalEdit.vue";
import ModalCourseAdd from "./ModalCourseAdd.vue";
const tableData = ref([]); // 使用ref来创建响应式数据
onMounted(async () => {
const response = await axios.post("/api/baseStudentCourse/list", {
id: localStorage.getItem('id')});
tableData.value = response.data.data; // 将请求结果赋值给响应式数据
});
const currentUser = localStorage.getItem("username");
const showModal = ref(false);
const showModalAddCourse = ref(false);
const editData = ref(null);
const showFlag = ref(String);
const editItem = (item, index) => {
editData.value = item;
showModal.value = true;
showFlag.value = '成绩修改';
};
const addItem = (item, index) => {
editData.value = item;
showModal.value = true;
showFlag.value = '成绩添加';
};
const closeModal = () => {
showModalAddCourse.value = false
};
const handleData = () => {
console.log("Page02 handleData")
const response = axios.post("/api/baseStudentCourse/list", {
id: localStorage.getItem('id')});
tableData.value = response.data.data; // 将请求结果赋值给响应式数据;
console.log(response)
};
const router = useRouter();
const resetUser = () => {
// 编辑逻辑
const key = 'id'; // 替换为你需要获取的localStorage的key
const value = localStorage.getItem(key);
// 如果需要解析JSON,可以在这里进行解析
try {
axios.post("/api/base/reset", {
id: localStorage.getItem('id')
}).then(resp => {
if (resp.data.code === 200) {
alert(resp.data.message);
localStorage.removeItem(localStorage.getItem('id'))
router.push('/')
} else {
alert(resp.data.message);
}
})
} catch (error) {
console.error(error);
// 处理错误
}
};
// 添加选课
const handleAddCourse = () => {
debugger
// editData.value = item;
showModalAddCourse.value = true;
};
// 删除选课
const handleDeleteCourse = (row, index) => {
console.log(row)
axios.post("/api/baseStudentCourse/delete", {
id: row.id
}).then(resp => {
if (resp.data.code === 200) {
alert(resp.data.message);
axios.post("/api/baseStudentCourse/list", {
id: localStorage.getItem('id')}).then(resp => {
if (resp.data.code === 200) {
tableData.value = resp.data.data
} else {
alert(resp.data.message);
}
})
} else {
alert(resp.data.message);
}
})
};
const updateList = (updatedItem) => {
// 假设使用index来更新list,但这种方式不推荐,如果数据顺序改变会有问题
const index = tableData.value.findIndex(item => item.id === updatedItem.id);
tableData.value.splice(index, 1, updatedItem);
showModal.value = false;
};
// 成绩修改
const refreshData = () => {
axios.post("/api/baseStudentCourse/list", {
id: localStorage.getItem('id')}).then(resp => {
if (resp.data.code === 200) {
tableData.value = resp.data.data
} else {
alert(resp.data.message);
}
})
showModal.value = false;
showModalAddCourse.value = false;
} ;
// console.log(""")
</script>
ModalEdit.vue
<template>
<div v-if="visible" class="modal">
<div class="modal-content">
<!-- <h2>编辑数据</h2>-->
<h2>{{ showFlag }}</h2>
<form @submit.prevent="handleSubmit">
<label>
分数:
<input type="text" v-model="formData.score" />
</label>
<!-- 其他需要编辑的字段也可以在这里添加 -->
<button type="submit" @click="submit()">提交</button>
<button @click="closeModal">取消</button>
</form>
</div>
</div>
</template>
<script>
import axios from "axios";
export default {
watch: {
visible() {
this.formData.id = this.editData.id; // 初始化id字段
this.formData.score = this.editData.score;
// this.formData.score = this.editData.score;
}
},
props: {
visible: {
type: Boolean,
required: true
},
editData: {
type: Object,
default: () => ({})
},
showFlag: {
type: Object,
default: () => ({})
}
},
emits: ['update:visible', 'submit', 'refreshData'],
data() {
return {
formData: {
id: null, // 添加id字段
score: null
}
};
},
methods: {
handleSubmit() {
// 确保发送完整对象,包含id字段
this.$emit('submit', { ...this.formData });
},
closeModal() {
this.$emit('update:visible', false);
},
// 成绩录入/修改
submit () {
debugger
console.log(this.formData)
// 编辑逻辑
const response = axios.post("/api/baseStudentCourse/update", {
id: this.formData.id,
score: this.formData.score
}).then(resp => {
if (resp.data.code === 200) {
alert(resp.data.message);
// 发送一个事件给父组件,表示数据已更新
this.$emit('refreshData', { // 假设服务器返回了更新后的数据,或者你可以传递更新后的id和score
success: true,
message: resp.data.message,
});
} else {
alert(resp.data.message);
}
})
}
}
};
</script>
<style scoped>
.modal {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(0, 0, 0, 0.5);
display: flex;
justify-content: center;
align-items: center;
z-index: 1000;
}
.modal-content {
background-color: #fff;
padding: 20px;
border-radius: 5px;
}
</style>
ModalCourseAdd.vue
<template>
<div v-if="visible" class="modal">
<div class="modal-content">
<h2>添加选课</h2>
<form @submit.prevent="handleSubmit">
<label>
选择学生:
<select v-model="formData.student">
<option v-for="student in students" :key="student.id" :value="student.id">
{{ student.name }}
</option>
</select>
</label>
<label>
选择课程:
<select v-model="formData.course">
<option v-for="course in courses" :key="course.id" :value="course.id">
{{ course.name }}
</option>
</select>
</label>
<!-- 其他需要编辑的字段也可以在这里添加 -->
<button type="submit" @click="submit">提交</button>
<button @click="closeModal">取消</button>
</form>
</div>
</div>
</template>
<script>
import axios from "axios";
export default {
props: {
visible: {
type: Boolean,
required: true
},
showFlag: {
type: Object,
default: () => ({})
}
},
emits: ['update:visible', 'submit', 'refreshData'],
data() {
return {
formData: {
id: null, // 添加id字段
score: null
}
};
},
created () {
axios.post("/api/student/list", {}).then(res => {
if (res.data.code === 200) {
debugger
this.students = res.data.data
}
})
axios.post("/api/course/list", {}).then(resp => {
if (resp.data.code === 200) {
debugger
this.courses = resp.data.data
}
})
console.log("准备输出课程和学生信息")
console.log(this.courses)
console.log(this.students)
},
methods: {
closeModal() {
this.$emit('update:visible', false);
},
// 成绩录入/修改
submit() {
console.log(this.formData)
// 编辑逻辑
axios.post("/api/baseStudentCourse/save", {
studentId: this.formData.student,
courseId: this.formData.course,
teacherId: localStorage.getItem('id')
}).then(resp => {
if (resp.data.code === 200) {
alert(resp.data.message);
// 发送一个事件给父组件,表示数据已更新
this.$emit('refreshData', { // 假设服务器返回了更新后的数据,或者你可以传递更新后的id和score
success: true,
message: resp.data.message,
});
} else {
alert(resp.data.message);
}
})
}
}
};
</script>
<style scoped>
.modal {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(0, 0, 0, 0.5);
display: flex;
justify-content: center;
align-items: center;
z-index: 1000;
}
.modal-content {
background-color: #fff;
padding: 20px;
border-radius: 5px;
}
</style>
五:页面运效果
更多推荐
所有评论(0)