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Get the Total Size of Selected Files in ASP.NET MVC Uploader control

You can get the total size of selected files before uploading it to the designated server. This can be achieved by using the selected event. Refer to the following example to calculate the total file size.

<div class="control_wrapper">
    @Html.EJS().Uploader("UploadFiles").Selected("onSelect").AsyncSettings(new Syncfusion.EJ2.Inputs.UploaderAsyncSettings { SaveUrl = "", RemoveUrl = "" }).Render()

    function onSelect(args) {
        var uploadObj = document.getElementById("UploadFiles").ej2_instances[0];
        var totalSize = 0;
        for (var i = 0; i < args.filesData.length; i++) {
            var file = args.filesData[i];
            totalSize = totalSize + file.size;
        var size = uploadObj.bytesToSize(totalSize);
        alert("Total select file's size is " + size);
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

namespace EJ2CoreSampleBrowser.Controllers.TextBoxes
    public partial class UploaderController : Controller
        public ActionResult DefaultFunctionalities()
            return View();