[Angularjs]ng-file-upload上傳文件

支持上傳進度，在上傳的時候，能夠取消或者停止，支持文件拖拽（HTML5），目錄拖拽（weikit），CORS，PUT(html5)/POST 方法
支持使用 Flash polyfill FileAPI 跨瀏覽器上傳 (HTML5 和 non-HTML5) 。容許客戶端在上傳以前驗證或者修改文件。
當文件的內容類型使用 $upload.http()時，支持直接上傳到 CouchDB，imgur 等等。支持 Angular httpPOST/PUT 請求的進度事件，更多內容請看 #88(comment)
Separate shim file loaded on demand for non-HTML5 code meaning no extra load/code if you just need HTML5 support. (Note that html5-shim.js is still needed for progress event in HTML5 browsers)
輕量級，使用常規的 $http 來上傳（支持非 HTML5 瀏覽器），因此提供全部 Angular $http 功能。

一個例子

須要的js文件，能夠去這裏下載：https://github.com/danialfarid/ng-file-upload

<!DOCTYPE html>
<html ng-app="app">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>文件上傳</title>
    <meta charset="utf-8" />
    <script src="JS/angular.min.js"></script>
    <script src="JS/ng-file-upload.min.js"></script>
    <script src="JS/ng-file-upload-shim.min.js"></script>
    <script>
        var app = angular.module('app', ['ngFileUpload']);
        app.controller('FileController', function ($scope, Upload) {
            $scope.uploadImg = '';
            //提交
            $scope.submit = function () {
                $scope.upload($scope.file);
            };
            $scope.upload = function (file) {
                $scope.fileInfo = file;
                Upload.upload({
                    //服務端接收
                    url: 'Ashx/UploadFile.ashx',
                    //上傳的同時帶的參數
                    data: { 'username': $scope.username },
                    file: file
                }).progress(function (evt) {
                    //進度條
                    var progressPercentage = parseInt(100.0 * evt.loaded / evt.total);
                    console.log('progess:' + progressPercentage + '%' + evt.config.file.name);
                }).success(function (data, status, headers, config) {
                    //上傳成功
                    console.log('file ' + config.file.name + 'uploaded. Response: ' + data);
                    $scope.uploadImg = data;
                }).error(function (data, status, headers, config) {
                    //上傳失敗
                    console.log('error status: ' + status);
                });
            };
        });
    </script>
</head>
<body>
    <form ng-controller="FileController">
        <img src="{{uploadImg}}"/> 
當前上傳用戶:<input type="text" placeholder="請輸入您的名稱" name="name" ng-model="username"/><div class="button" ngf-select ng-model="file" name="file" ngf-pattern="'image/*" accept="image/*" ngf-max-size="20MB" ngf-min-height="100">Select</div><button type="submit" ng-click="submit()">submit</button> {{fileInfo.name}}<br /> {{fileInfo.size}} </form></body></html>

簡單測試

其中data中存的爲咱們上傳文件的同時，須要的參數。

完整的例子，上傳成功並在頁面上進行預覽。

public class UploadFile : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "application/json";
            var paras = context.Request.Params["data"];
            JObject jobj = JObject.Parse(paras);
            string strUserName = jobj["username"].ToString();
            HttpFileCollection files = context.Request.Files;
            if (files.Count > 0)
            {
                var file = files[0];
                string fileExt = Path.GetExtension(file.FileName);
                string fileNewName = Guid.NewGuid() + fileExt;
                string strRelativeDir = "/Upload/" + strUserName;
                string strDir = context.Request.MapPath(strRelativeDir);
                if (!Directory.Exists(strDir))
                {
                    Directory.CreateDirectory(strDir);
                }
                string strSavePath = Path.Combine(strDir, fileNewName);
                file.SaveAs(strSavePath);
                context.Response.Write(Path.Combine(strRelativeDir, fileNewName));
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }