In this article I will explain with an example, how to implement File Upload using AngularJS in ASP.Net MVC Razor.
This article will illustrate how to upload multiple files with the standard FileUpload element using HTML5 and AngularJS in ASP.Net MVC Razor.
 
 
Namespace
You will need to import the following namespace.
using System.IO;
 
 
Controller
The Controller consists of two Action methods.
Action method for handling GET operation
Inside this Action method, simply the View is returned.
 
Action method for handling POST operation
This Action method handles the call made from the AngularJS client for upload.
It first loops through the Request.Files collections and then inside the loop, each file is saved in the folder named Uploads.
Finally a success response is sent back to the AngularJS client.
C#
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public ContentResult Upload()
    {
        string path = Server.MapPath("~/Uploads/");
        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }
 
        foreach (string key in Request.Files)
        {
            HttpPostedFileBase postedFile = Request.Files[key];
            postedFile.SaveAs(path + postedFile.FileName);
        }
 
        return Content("Success");
    }
}
 
 
View
The View consists of an HTML DIV to which ng-app and ng-controller AngularJS directives have been assigned.
Note: If you want to learn more about these directives, please refer my article Introduction to AngularJS.
 
The HTML DIV consists of an HTML FileUpload element for which the multiple property is set, so that user can select multiple files.
The HTML FileUpload element has also been assigned the ngf-select directive so that when files are selected in the HTML FileUpload element, it makes call to the UploadFiles function inside the AngularJS controller.
The selected files are sent to the Controller’s Action method using the Upload function of the ngFileUpload AngularJS module.
Timeout function has been used which periodically checks the response of the upload and it updates the Progress Bar.
@{
    Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width"/>
    <title>Index</title>
    <style type="text/css">
        body {
            font-family: Arial;
            font-size: 10pt;
        }
 
        .thumb {
            width: 24px;
            height: 24px;
            float: none;
            position: relative;
            top: 7px;
        }
 
        form .progress {
            line-height: 15px;
        }
 
        .progress {
            display: inline-block;
            width: 100px;
            border: 3px groove #ccc;
        }
 
        .progress > div {
            font-size: smaller;
            background-color: red;
            width: 0%;
        }
    </style>
</head>
<body>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.9/angular.min.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/danialfarid-angular-file-upload/12.2.13/ng-file-upload.min.js"></script>
    <script type="text/javascript">
        var app = angular.module('MyApp', ['ngFileUpload'])
        app.controller('MyController', function ($scope, Upload, $timeout) {
            $scope.UploadFiles = function (files) {
                $scope.SelectedFiles = files;
                if ($scope.SelectedFiles && $scope.SelectedFiles.length) {
                    Upload.upload({
                        url: '/Home/Upload/',
                        data: {
                            files: $scope.SelectedFiles
                        }
                    }).then(function (response) {
                        $timeout(function () {
                            $scope.Result = response.data;
                        });
                    }, function (response) {
                        if (response.status > 0) {
                            var errorMsg = response.status + ': ' + response.data;
                            alert(errorMsg);
                        }
                    }, function (evt) {
                        var element = angular.element(document.querySelector('#dvProgress'));
                        $scope.Progress = Math.min(100, parseInt(100.0 * evt.loaded / evt.total));
                        element.html('<div style="width: ' + $scope.Progress + '%">' + $scope.Progress + '%</div>');
                    });
                }
            };
        });
    </script>
    <div ng-app="MyApp" ng-controller="MyController">
        <input type="file" multiple="multiple" ngf-select="UploadFiles($files)"/>
        <hr/>
        Files:
        <ul><li ng-repeat="file in SelectedFiles">{{file.name}}</li></ul>
        <div id="dvProgress" class="progress" ng-show="Progress >= 0">
        </div>
    </div>
</body>
</html>
 
 
Uploading Large files
In order to upload large files, you will need to
1. Set the following setting in the system.web section of the Web.Config file. The executionTimeout value is set to 540 seconds while the maxRequestLength is set to the maximum size of the files in Bytes.
<httpRuntime targetFramework="4.5" executionTimeout="540" maxRequestLength="904857600" />
 
2. Set the following setting in the system.webServer section of the Web.Config file. The maxAllowedContentLength is set to the maximum size of the files in Bytes.
<security>
   <requestFiltering>
     <requestLimits maxAllowedContentLength="904857600"></requestLimits>
   </requestFiltering>
</security>
 
 
Screenshot
File Upload using AngularJS and ASP.Net MVC
 
 
Browser Compatibility

The above code has been tested in the following browsers only in versions that support HTML5.

Internet Explorer  FireFox  Chrome  Safari  Opera 

* All browser logos displayed above are property of their respective owners.

 
 
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