Add Confirm Dialog to Remove the Files in ASP.NET MVC Uploader control

<div class="control_wrapper">
    @Html.EJS().Uploader("UploadFiles").Removing("onremove").AsyncSettings(new Syncfusion.EJ2.Inputs.UploaderAsyncSettings { SaveUrl = "https://ej2.syncfusion.com/services/api/uploadbox/Save", RemoveUrl = "https://ej2.syncfusion.com/services/api/uploadbox/Remove" }).Render()
    @Html.EJS().Dialog("dialog").Target("body").Visible(false).Width("250px").Content("Confirm to remove the file?").Buttons(ViewBag.confirmbutton).Render()
</div>

<script>
    var removeFile = [], dialog;

    window.onload = function () {
        dialog = document.getElementById("dialog").ej2_instances[0];
    }

    function onremove(args) {
        emoveFile = [];
        args.cancel = true;
        removeFile.push(args.filesData);
        dialog.show();
    }

    function onClick(args) {
        var uploadObj = document.getElementById("UploadFiles").ej2_instances[0];
        dialog.hide();
        uploadObj.remove(removeFile[0], false, true);
    }

    function Close() {
        dialog.hide();
    }
</script>

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()
        {
            List<DialogDialogButton> button = new List<DialogDialogButton>() { };
            button.Add(new DialogDialogButton() { Click = "confirmBtnClick", ButtonModel = new confirmButtonModel() { content = "Cancel", isPrimary = true } });
            button.Add(new DialogDialogButton() { Click = "confirmBtnClick", ButtonModel = new confirmButtonModel() { content = "OK"} });
            ViewBag.confirmbutton = button;
            return View();
            
        }
    }
    
    public class confirmButtonModel
    {
        public string content { get; set; }
        public bool isPrimary { get; set; }
    }
}

.control_wrapper {
    max-width: 400px;
    margin: 0 auto;
}