Tips for pairing Vue with Excel: How to implement dynamic filtering and sorting of data

Tips for pairing Vue with Excel: How to implement dynamic filtering and sorting of data

Introduction:
In modern data processing, Excel is one of the most widely used tools. However, sometimes we need to integrate data from Excel into our applications and be able to dynamically filter and sort the data. This article will introduce techniques to use the Vue framework to achieve this requirement and provide code examples.

1. Import the Excel file
First, we need to import the Excel file and parse the data in it. This can be done through some libraries, such as xlsx or xlsjs. In Vue, you can introduce the Excel file in the mounted life cycle hook and process the data in it. The following is a sample code:

<template>
  <div>
    <input type="file" ref="fileInput" @change="handleFileChange" />
  </div>
</template>

<script>
import XLSX from 'xlsx';

export default {
  methods: {
    handleFileChange(event) {
      const file = event.target.files[0];
      const reader = new FileReader();

      reader.onload = (event) => {
        const data = new Uint8Array(event.target.result);
        const workbook = XLSX.read(data, { type: 'array' });
        const worksheet = workbook.Sheets[workbook.SheetNames[0]];
        const jsonData = XLSX.utils.sheet_to_json(worksheet, {header: 1});

        // 在这里处理Excel数据
        // 将jsonData存储到Vue数据中，用于后续操作
      };

      reader.readAsArrayBuffer(file);
    }
  }
}
</script>

In the above code, we first introduced the xlsx library, and then passed FileReader in the handleFileChange method The object reads the Excel file and parses it into JSON formatted data using the xlsx library. Finally, we can save the parsed data in the data of the Vue instance for subsequent operations.

2. Dynamically filter data
Next, we can use Vue’s calculated properties and filters to implement the function of dynamically filtering data. The following is a sample code:

<template>
  <div>
    <input type="text" v-model="searchKeyword" placeholder="输入关键字过滤表格" />

    <table>
      <thead>
        <tr>
          <th v-for="header in headers">{{ header }}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(row, index) in filteredData" :key="index">
          <td v-for="cell in row">{{ cell }}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      data: [], // Excel数据
      searchKeyword: '' // 过滤关键字
    };
  },
  computed: {
    headers() {
      if (this.data.length > 0) {
        return this.data[0];
      }
      return [];
    },
    filteredData() {
      if (this.data.length > 0) {
        return this.data.filter(row => {
          return row.some(cell => cell.includes(this.searchKeyword));
        });
      }
      return [];
    }
  }
}
</script>

In the above code, we add an input box to the template for entering filter keywords. In the calculated attribute headers, we return the first row of Excel data, that is, the header information. In the calculated property filteredData, we use the filter method to filter out the rows containing the filter keyword.

3. Dynamic sorting of data
In addition to filtering data, we may also need the function of sorting data. In Vue, you can use the sort method of the array to implement sorting. The following is a sample code:

<template>
  <div>
    <table>
      <thead>
        <tr>
          <th v-for="header in headers">
            {{ header }}
            <button @click="handleSort(header)">排序</button>
          </th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(row, index) in filteredData" :key="index">
          <td v-for="cell in row">{{ cell }}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      data: [], // Excel数据
      searchKeyword: '', // 过滤关键字
      sortKey: '', // 排序关键字
      sortOrder: '' // 排序顺序，'asc'为升序，'desc'为降序
    };
  },
  computed: {
    headers() {
      if (this.data.length > 0) {
        return this.data[0];
      }
      return [];
    },
    filteredData() {
      if (this.data.length > 0) {
        return this.data.filter(row => {
          return row.some(cell => cell.includes(this.searchKeyword));
        }).sort((a, b) => {
          if (this.sortKey !== '' && this.sortOrder !== '') {
            const indexA = this.headers.indexOf(this.sortKey);
            const indexB = this.headers.indexOf(this.sortKey);

            if (this.sortOrder === 'asc') {
              return a[indexA] > b[indexB] ? 1 : -1;
            } else if (this.sortOrder === 'desc') {
              return a[indexA] < b[indexB] ? 1 : -1;
            }
          }
        });
      }
      return [];
    }
  },
  methods: {
    handleSort(key) {
      if (this.sortKey === key) {
        this.sortOrder = this.sortOrder === 'asc' ? 'desc' : 'asc';
      } else {
        this.sortKey = key;
        this.sortOrder = 'asc';
      }
    }
  }
}
</script>

In the above code, we have added a button in each column of the table header to trigger the sorting method. In the handleSort method, we determine whether the currently sorted column is consistent with the previous sorting column. If it is consistent, switch the sorting order; if it is inconsistent, set a new sorting column and set the sorting order to ascending order. . In the computed property filteredData, we sort the data based on the sorting column and the sorting order.

Conclusion:
Through the above code examples, we can see how to use Vue to dynamically filter and sort Excel data. With Vue's computed properties and filters, we can easily implement these features and make our applications more flexible and efficient. Hope this article helps you!

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