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[英]How to pass href parameter from parent vue component to child component?
[英]How to pass parameter from Vue root to component?
我試圖將一個字符串從 index.cshtml 傳遞給 vue 根元素。
我試圖傳遞的參數是:userId
查看:Index.cshtml(這是我獲取參數的地方)
@using Microsoft.AspNetCore.Identity
@inject SignInManager<User> SignInManager
@using LaBouteilleDamour.Domain.Models;
@inject UserManager<User> UserManager
@if (SignInManager.IsSignedIn(User))
{
User user = await UserManager.GetUserAsync(User);
var userid = UserManager.GetUserId(User);
<div id="cartApp" userId:"userid"></div>
<script src="./js/Cart.bundle.js" asp-append-version="true"></script>
}
Vue 根目錄:Cart.boot.ts
import Vue from "vue";
import Cart from "./Components/Cart.vue";
new Vue({
el: "#cartApp",
template: '<Cart :userId="userId" />',
props: {
*userId: String,
},
components: {
Cart
}
});
Vue 組件:Cart.vue(我需要參數去的地方)
<template>
/*HTML*/
</template>
<script lang="ts">
import ShoppingCartItem from "../Components/ShoppingCartItem.vue";
import ShoppingCartService, { ICartItem } from "./AP
/ShoppingCartService";
import Vue from "vue";
interface IShoppingCartpageData {
items: ICartItem[],
}
export default Vue.extend({
data(): IShoppingCartpageData {
return {
items: [],
}
},
props: {
userId: {
type: String,
required:true,
}
},
...
})
</script>
您正在模板中傳遞“userId”,但 userId 未在 vue 的數據函數中定義,因此不是響應式的,這意味着您不能在 DOM 中使用它,除非您在數據函數中聲明它。
根視圖也不需要道具,道具應該只有組件將從父組件接收的那些元素。
所以你的根元素代碼必須是這樣的
import Vue from "vue"; import Cart from "./Components/Cart.vue"; new Vue({ el: "#cartApp", template: '<Cart :userId="userId" />', data: function(){ return { userId: userid, // Accessing userId from global scope as it is defined in Index.cshtml. } }, components: { Cart } });
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