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Trigger Click Event of Input File from External Button in ASP.NET Core Uploader control

28 Jul 2021 / 1 minute to read

You can trigger the click event of input file from external button using click event of button. In the below sample, triggered click event of input file from Essential JavaScript 2 Button.

tagHelper
external-click.cs
index.css
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@{
    var asyncSettings = new Syncfusion.EJ2.Inputs.UploaderAsyncSettings { SaveUrl = "https://ej2.syncfusion.com/services/api/uploadbox/Save", RemoveUrl = "https://ej2.syncfusion.com/services/api/uploadbox/Remove" };
}

<div class="col-lg-8 control-section">
    <div class="control_wrapper">
        <!-- Initialize Uploader -->
        <div id="dropArea">
            <span id="drop"> Drop image (JPG, PNG) files here or <button class='e-btn e-control' id="browse">Browse</button></span>
        </div>
        <ejs-uploader id="UploadFiles" dropArea="#drop" asyncSettings="@asyncSettings">
        </ejs-uploader>
    </div>
</div>

<script>
    window.onload = function () {
        document.getElementById('browse').onclick = () => {
            document.getElementsByClassName('e-file-select-wrap')[0].querySelector('button').click();
        };
    }
</script>
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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();
        }
    }
}
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.control_wrapper {
        max-width: 500px;
        margin: auto;
    }
    #dropArea {
        border: 1px dashed #c3c3cc;
        text-align: center;
        padding: 20px 0 10px;
    }

    .e-file-select-wrap {
        display: none;
    }

    .control_wrapper .e-upload .e-upload-drag-hover {
        margin: 0;
    }

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