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AngularJS向后端ASP.NET API控制器上传文件

2018年06月17日  | 移动技术网IT编程  | 我要评论

本文实例介绍了前端angularjs向后端asp.net web api上传文件的实现方法，具体内容如下

首先服务端： 

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() ?? 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;}
}

客户端主页面：

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

引用：

  • 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

upload.html部分视图页用来接受文件。

upload.html

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

app.js模块依赖和全局配置。

app.js

'use strict'

angular.module('angularuploadapp',[
  'ngcookies',
  'ngresource',
  'ngsanitize',
  'ngroute',
  'angularfileupload'
])
.config(function($routeprovider){
  $routeprovider
    .when('/', {
      templateurl: 'upload.html',
      controller: 'uploadctrl'
    })
    .otherwise({
      resirectto: '/'
    })
})

控制器提供上传和取消上传的方法。

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();
    }
  })

以上就是前端angularjs向后端asp.net web api上传文件的实现方法，希望对大家的学习有所帮助。

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