AngularJS - upload and display image using FileRea

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Directive to get files input with ng-model [duplicate] 1 answer
ng-model for `<input type=“file”/>` (with directive DEMO) 12 answers

I use the following example, it works perfectly , but I'd like to upload multiple images simultaneously.

<div ng-controller="MyCtrl">

<div ng-repeat="step in stepsModel">
    <img class="thumb" ng-src="{{step}}" />
</div>

<input type='file' ng-model-instant onchange="angular.element(this).scope().imageUpload(this)" />

 $scope.stepsModel = [];

$scope.imageUpload = function(element){
    var reader = new FileReader();
    reader.onload = $scope.imageIsLoaded;
    reader.readAsDataURL(element.files[0]);
}

$scope.imageIsLoaded = function(e){
    $scope.$apply(function() {
        $scope.stepsModel.push(e.target.result);
    });
}

Thank you kindly help me, I started with angularjs

标签： angularjs file upload filereader

3条回答

劳资没心，怎么记你

2楼-- · 2019-02-10 05:39

Directive to get files input with `ng-model` (multiple files)

The AngularJS built-in <input> directive does not handle <input type=file>. One needs a custom directive for that.

<input type="file" files-input ng-model="fileArray" multiple>

The files-input directive:

angular.module("app").directive("filesInput", function() {
  return {
    require: "ngModel",
    link: function postLink(scope,elem,attrs,ngModel) {
      elem.on("change", function(e) {
        var files = elem[0].files;
        ngModel.$setViewValue(files);
      })
    }
  }
})

The above directive adds a change listener that updates the model with the files property of the input element.

This directive enables <input type=file> to automatically work with the ng-change and ng-form directives.

The DEMO on PLNKR

Inline Demo of `files-input` Directive

angular.module("app",[]);

angular.module("app").directive("filesInput", function() {
  return {
    require: "ngModel",
    link: function postLink(scope,elem,attrs,ngModel) {
      elem.on("change", function(e) {
        var files = elem[0].files;
        ngModel.$setViewValue(files);
      })
    }
  }
});

<script src="//unpkg.com/angular/angular.js"></script>
  <body ng-app="app">
    <h1>AngularJS Input `type=file` Demo</h1>
    
    <input type="file" files-input ng-model="fileArray" multiple>
    
    <h2>Files</h2>
    <div ng-repeat="file in fileArray">
      {{file.name}}
    </div>
  </body>

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何必那么认真

3楼-- · 2019-02-10 05:41

SOLUTION:

http://jsfiddle.net/orion514/kkhxsgLu/136/

<div ng-controller="MyCtrl">

<div ng-repeat="step in stepsModel">
    <img class="thumb" ng-src="{{step}}" />
</div>

<input type='file' ng-model-instant 
       onchange="angular.element(this).scope().imageUpload(event)"
       multiple />

$scope.stepsModel = [];

$scope.imageUpload = function(event){
     var files = event.target.files; //FileList object

     for (var i = 0; i < files.length; i++) {
         var file = files[i];
             var reader = new FileReader();
             reader.onload = $scope.imageIsLoaded; 
             reader.readAsDataURL(file);
     }
}

$scope.imageIsLoaded = function(e){
    $scope.$apply(function() {
        $scope.stepsModel.push(e.target.result);
    });
}

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虎瘦雄心在

4楼-- · 2019-02-10 06:01

Zypps987, try using var file = files[0], not inside a loop.

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