Guide to using AngularJS to upload FormData object

Question

Guide to using AngularJS to upload FormData object

I recently started using angular-js and encountered a problem when trying to submit multipart/form-data with an image. The $http.post() method only supports json format, so I needed to convert the formdata object to json format.

$scope.SubmitForm=function()
{
    url = siteurl + '/admin/' + $scope.module + '/add';

    var form=document.getElementById("addForm");
    var formData=new FormData(form);

    $http({
        url     :   url,
        method  :   "POST",
        data    :   formData,
    })
    .then(function(responseText) {                
        alert(JSON.stringify(responseText));

    //process data
    },function(){
        alert("hello from error");
    });

}

Unfortunately, this approach did not work for me. I then tried converting the data to json format and it worked fine.

formData={
    "first_name" :  $('#first_name').val(),
    "last_name"  :  $('#last_name'),
    //....
};

However, I was unsure of how to append my image file to this format. Any suggestions on how to achieve this?

Is there a specific function that can help in converting formdata object to json format?

javascript json angularjs form-data

Answer 1

Answer №1

After incorporating the following two lines of code in the $http configuration section, the issue was resolved (thanks to everyone who helped)-

      $http({
            url     :   url,
            method  :   "POST",
            data    :   formData,
            transformRequest: angular.identity, // refer to AngularJS documentation
            headers : {'Content-Type':undefined}// changing content type to undefined alters the default content type of AngularJS
        }).then(function(responseText){
            
            alert(JSON.stringify(responseText));
            ///$scope.tablerows=$scope.totaltablerows;
            ///$scope.searchFunction();
        },function(){
            alert("hello from error");
        });

This simple solution worked for me.

Answer 2

After incorporating the following two lines of code in the $http configuration section, the issue was resolved (thanks to everyone who helped)-

      $http({
            url     :   url,
            method  :   "POST",
            data    :   formData,
            transformRequest: angular.identity, // refer to AngularJS documentation
            headers : {'Content-Type':undefined}// changing content type to undefined alters the default content type of AngularJS
        }).then(function(responseText){
            
            alert(JSON.stringify(responseText));
            ///$scope.tablerows=$scope.totaltablerows;
            ///$scope.searchFunction();
        },function(){
            alert("hello from error");
        });

This simple solution worked for me.

Answer 3

Answer №2

When dealing with forms in Angular, it's highly recommended to utilize the ng-model directive. This creates a scope variable within your controller that allows for two-way data binding. If you don't have a form available, you can set it up like this (this is just a simplified example and not tested):

<form name="myForm" ng-submit="SubmitForm()">
    Name: <input ng-model="fields.name">
    Address: <input ng-model="fields.address">
    ....
</form>

In your JavaScript controller:

 $scope.submitForm = function(){    
        var data = $scope.fields,
            url = '/admin/' + $scope.module + '/add'; // Assuming $scope.module is accessible from other parts of the code  

        $http.post(url, data).then(function(resp){
        // Handle response...

        });        
    }

For more information, check out the documentation here: https://docs.angularjs.org/api/ng/directive/ngModel. You can also find examples on W3schools: http://www.w3schools.com/angular/angular_forms.asp

Answer 4

When dealing with forms in Angular, it's highly recommended to utilize the ng-model directive. This creates a scope variable within your controller that allows for two-way data binding. If you don't have a form available, you can set it up like this (this is just a simplified example and not tested):

<form name="myForm" ng-submit="SubmitForm()">
    Name: <input ng-model="fields.name">
    Address: <input ng-model="fields.address">
    ....
</form>

In your JavaScript controller:

 $scope.submitForm = function(){    
        var data = $scope.fields,
            url = '/admin/' + $scope.module + '/add'; // Assuming $scope.module is accessible from other parts of the code  

        $http.post(url, data).then(function(resp){
        // Handle response...

        });        
    }

For more information, check out the documentation here: https://docs.angularjs.org/api/ng/directive/ngModel. You can also find examples on W3schools: http://www.w3schools.com/angular/angular_forms.asp

Answer 5

Answer №3

To achieve the desired outcome, follow this structure:

  let form = document.getElementById('addForm');
  let formData = new FormData(form);
  let fileToUpload = this.files[0];    
  formData.append("uploadedFile", fileToUpload);
  // Additional parameters can be added like this
  formData.append("first_name", $('#first_name').val());
  formData.append("last_name", $('#last_name').val());

Check out this GitHub example for reference.

Answer 6

To achieve the desired outcome, follow this structure:

  let form = document.getElementById('addForm');
  let formData = new FormData(form);
  let fileToUpload = this.files[0];    
  formData.append("uploadedFile", fileToUpload);
  // Additional parameters can be added like this
  formData.append("first_name", $('#first_name').val());
  formData.append("last_name", $('#last_name').val());

Check out this GitHub example for reference.

Guide to using AngularJS to upload FormData object

Answer №1

Answer №2

Answer №3

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