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

26 Oct 2021 / 1 minute to read

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.

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<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);
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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();

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