How to implement a single-table header and multi-body electronic quotation form in Vue and perform automatic calculation and summary?

Vue.js builds single-head multi-body electronic quotation form and automatic calculation summary

In modern business environments, electronic quotation forms are crucial, which can significantly improve efficiency and accuracy. This article will explain in detail how to use the Vue.js framework to build complex quotation forms with single headers and multiple table bodies, and realize automatic calculation and summary functions.

Requirements Analysis

The goal is to create a quote form with one header and multiple bodies. Each table body is a table whose row data calculates the recommended price based on the preset business logic and is automatically summarized to the total price of the table body. Unlike Excel, users cannot directly modify calculation formulas.

Implementation plan

We adopt the componentized development model of Vue.js, combine v-for instructions to render tables dynamically, and use computational properties and methods to achieve automatic calculation and summary.

1. Data structure: Use an array to store the data of each table body. Each array element is an object that contains all rows of data of the table body.

2. Table rendering: Use Vue.js' template syntax to render the table header and table body. v-for instruction traverses the data array and dynamically generates each table body and its row. Consider using a custom component to encapsulate each watch body to improve code reusability.

3. Recommended price calculation: define a function calculateSuggestedPrice(item) in methods of the Vue component to calculate the recommended price of each row based on the preset business logic. The parameter item of this function represents the data object of the current row.

    methods: {
     calculateSuggestedPrice(item) {
       // Calculate the suggested price based on actual business logic, for example:
       return item.quantity * item.unitPrice; 
     }
   }

4. Automatic summary: Use the computed attribute computed to calculate the total price of each body and the total of all body in real time.

    computed: {
     tableTotals() {
       return this.tableData.map(table => ({
         total: table.reduce((sum, item) => sum this.calculateSuggestedPrice(item), 0)
       }));
     },
     grandTotal() {
       return this.tableTotals.reduce((sum, table) => sum table.total, 0);
     }
   }

5. User input limit: In order to prevent users from modifying the calculation logic, the calculation logic can be completely encapsulated inside the Vue component, allowing the user to enter only the original data (such as quantity, unit price, etc.). You can use v-model to bind data and add input verification as needed.

Through the above steps, a fully functional single-table multi-body electronic quotation form can be built in Vue.js to realize automatic calculation and summary, and effectively prevent users from misoperating or maliciously modifying calculation formulas. To enhance the user experience, consider adding data verification, form verification, and a more granular UI design.

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