Sort the Selected Files in JavaScript Uploader control

27 Jul 2021 / 2 minutes to read

You can sort the selected files in uploader component by using the selected event. Refer to the following example.

Source

Preview

app.ts

index.html

index.css

import {  Uploader, FileInfo, SelectedEventArgs } from '@syncfusion/ej2-inputs';
import { Event } from '@syncfusion/ej2-base';

let initial: boolean = true;

let uploadObj: Uploader = new Uploader({
    asyncSettings: {
        saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
        removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove'
    },
    selected: onSelect

});
uploadObj.appendTo('#fileupload')

function onSelect(args: SelectedEventArgs): void {
    if (initial) { initial = false; return; }
    args.isModified = true;
    let oldFiles: FileInfo[] = uploadObj.getFilesData();
    let filesData: FileInfo[] = args.filesData.concat(oldFiles);
    let modifiedData: FileInfo[] = sortFileList(filesData);
    args.modifiedFilesData = modifiedData;
}

function sortFileList(filesData: FileInfo[]): FileInfo[] {
    let files: FileInfo[] = filesData;
    let fileNames: string[] = [];
    for (let i: number = 0; i < files.length; i++) {
        fileNames.push(files[i].name);
    }
    let sortedFileNames: string[] = fileNames.sort();
    let sortedFilesData: FileInfo[] = [];
    let index: number = 0;
    for (let name of sortedFileNames) {
        for (let i: number = 0; i < files.length; i++) {
            if (name === files[i].name) {
                sortedFilesData.push(files[i]);
            }
        }
    }
    return sortedFilesData;
}

<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 Uploader</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 Uploader Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <input type="file" id="fileupload" name="UploadFiles"/>
    </div>
</body>
</html>

#container {
  visibility: hidden;
  margin: 0 auto;
  width: 300px;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

You can also explore JavaScript File Upload feature tour page for its groundbreaking features. You can also explore our JavaScript File Upload example to understand how to browse the files which you want to upload to the server.