AngularJS upload files to backend ASP.NET API controller_AngularJS

The example of this article introduces the implementation method of uploading files from front-end AngularJS to back-end ASP.NET Web API. The specific content is as follows

First server:

public class FilesController : ApiController
{
  //using System.Web.Http
  [HttpPost]
  public async Task<HttpResponseMessage> Upload()
  {
    if(!Request.Content.IsMimeMultipartContent())
    {
      this.Request.CreateResponse(HttpStatusCode.UnsuportedMediaType);
    }
    
    var provider = GetMultipartProvider();
    var result = await Request.Content.ReadAsMultipartAsync(provider);
    
    //文件名类似"BodyPart_26d6abe1-3ae1-416a-9429-b35f15e6e5d5"这样的格式
    var originalFileName = GetDeserializedFileName(result.FileData.First());
    
    var uploadFileInfo = new FileInfo(result.FileData.First().LocalFileName);
    
    //如果前端无表单数据，这里注销
    var filleUploadObj = GetFormData<UploadDataModel>(result);
    
    var returnData = "ReturnTest";
    return this.Request.CreateResponse(HttpStatusCode.OK, new {returnData});
  }
  
  private MultipartFormDataStreamProvider GetMultipartProvider()
  {
    //图片的上传路径
    var uploadFolder = "~/App_Data/FileUploads";
    
    //获取根路径
    var root = HttpContext.Current.Server.MapPath(uploadFolder);
    
    //创建文件夹
    Directory.CreateDirectory(root);
    return new MultipartFormDataStreamProvider(root);
  }
  
  //从Provider中获取表单数据
  private object GetFormData<T>(MultipartFormDataStreamProvider result)
  {
    if(result.FormData.HasKeys())
    {
      var unescapedFormData = Uri.UnescapeDataString(result.FormData.GetValues(0).FirstOrDefault() &#63;&#63; String.Empty);
      
      if(!String.IsNullOrEmpty(unescapedFormData))
      {
        return JsonConvert.DeserializeObject<T>(upescapedFormData);
      }
    }
    return null;
  }
  
  //获取反序列化文件名
  private string GetDeserializedFileName(MultipartFileData fileData)
  {
    var fileName = GetFileName(fileData);
    return JsonConvert.DeserializedObject(fileName).ToString();
  }
  
  //获取文件名
  public string GetFileName(MultipartFileData fileData)
  {
    return fileData.Headers.ContentDisposition.FileName;
  }
}

UploadDataModel.cs

public class UploadDataModel
{
  public string testString1{get;set;}
  public string testString2{get;set;}
}
 

Client main page:

index.html

<div ng-include="'upload.html'"></div>

Quote:

• angular-file-upload-shim.js
  
• angular.js
  
• angular-file-upload.js
  
• angular-cookies.js
  
• angular-resource.js
  
• angular-sanitize.js
  
• angular-route.js
  
• app.js
  
• upload.js
  

The upload.html partial view page is used to accept files.

upload.html

<div ng-controller="UploadCtrl"
  <input type="file" ng-file-select="onFileSelect($files)" multiple>
</div>

app.js module dependencies and global configuration.

app.js

'use strict'

angular.module('angularUploadApp',[
  'ngCookies',
  'ngResource',
  'ngSanitize',
  'ngRoute',
  'angularFileUpload'
])
.config(function($routeProvider){
  $routeProvider
    .when('/', {
      templateUrl: 'upload.html',
      controller: 'UploadCtrl'
    })
    .otherwise({
      resirectTo: '/'
    })
})

The controller provides methods for uploading and canceling uploads.

upload.js

'use strict';

angular.module('angularUploadApp')
  .controller('UploadCtrl', function($scope, $http, $timeout, $upload){
    $scope.upload = [];
    $scope.fileUploadObj = {testString1: "Test ring 1", testString2: "Test string 2"};
    
    $scope.onFileSelect = function ($files) {
      //$files: an array of files selected, each file has name, size, and type.
      for (var i = 0; i < $files.length; i++) {
        var $file = $files[i];
        (function (index) {
          $scope.upload[index] = $upload.upload({
            url: "./api/files/upload", // webapi url
            method: "POST",
            data: { fileUploadObj: $scope.fileUploadObj },
            file: $file
          }).progress(function (evt) {
            // get upload percentage
            console.log('percent: ' + parseInt(100.0 * evt.loaded / evt.total));
          }).success(function (data, status, headers, config) {
            // file is uploaded successfully
            console.log(data);
          }).error(function (data, status, headers, config) {
            // file failed to upload
            console.log(data);
          });
        })(i);
      }
    }

    $scope.abortUpload = function (index) {
      $scope.upload[index].abort();
    }
  })

The above is the implementation method of uploading files from front-end AngularJS to back-end ASP.NET Web API. I hope it will be helpful to everyone's learning.