How to send POST in angularjs with multiple params?

Question

I want to send multiple parameters using angularjs HTTP post service.

Here is client side code:

$http.post("http://localhost:53263/api/Products/", [$scope.product, $scope.product2]).
        then(function (data, status, headers, config) { alert("success") },
             function (data, status, headers, config) { alert("error") });

Here is server side code:

// POST api/<controller>
public void Post([FromBody]Product product,[FromBody]Product product2)
{
    var productRepository = new ProductRepository();
    var newProduct = productRepository.Save(product);
}

But when I make the post I get error. Any idea what I am doing wrong?

Answer 1

Client Side

Data needs to be grouped in an object array as payload - Indata:

var Indata = {'product': $scope.product, 'product2': $scope.product2 };

Pass the payload through $http.post as the second argument:

$http.post("http://localhost:53263/api/Products/", Indata).then(function (data, status, headers, config) { 
    alert("success"); 
},function (data, status, headers, config) { 
    alert("error"); 
});

Server Side

Create a Data Transfer Object(DTO) class as such:

public class ExampleRequest {
   public string product {get; set;};
   public string product2 {get; set;};
}

The class below accepts DTO with the same property names which the payload is carrying.

public void Post(ExampleRequest request)
{
    var productRepository = new ProductRepository();
    var newProduct = productRepository.Save(request.product);
}

In above class, request contains 2 properties with values of product and product2

Answer 2

Consider a post url with parameters user and email

params object will be

 var data = {user:'john', email:'[email protected]'};
    $http({
      url: "login.php",
      method: "POST",
      params: data
    })

Answer 3

It depends on what is your backend technology. If your backend technology accepting JSON data. data:{id:1,name:'name',...}

otherwise, you need to convert your data best way to do that creating Factory to convert your data to id=1&name=name&...

then on $http define content-type. you can find full article @https://www.bennadel.com/blog/2615-posting-form-data-with-http-in-angularjs.htm

$http({
    method: 'POST',
    url: url,
    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
    transformRequest: function(obj) {
        var str = [];
        for(var p in obj)
        str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
        return str.join("&");
    },
    data: {username: $scope.userName, password: $scope.password}
}).success(function () {});

ref:How do I POST urlencoded form data with $http in AngularJS?

!important about encodeURIComponent(obj[p]) will transfer object the way implicit. like a date value will be converted to a string like=>'Fri Feb 03 2017 09:56:57 GMT-0700 (US Mountain Standard Time)' which I don't have any clue how you can parse it at least in back-end C# code. (I mean code that doesn't need more than 2-line) you can use (angular.isDate, value.toJSON) in date case to convert it to more meaningful format for your back-end code.

I'm using this function to comunicating to my backend webservices...

 this.SendUpdateRequest = (url, data) => {
            return $http({
                method: 'POST',
                url: url,
                headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
                transformRequest: function (obj) { return jsontoqs(obj); },
                data: { jsonstring: JSON.stringify(data) }
            });
        }; 

and bellow code to use it...

webrequest.SendUpdateRequest(
  '/Services/ServeicNameWebService.asmx/Update',
  $scope.updatedto)
  .then(
      (res) => { /*/TODO/*/ },
      (err) => { /*/TODO/*/ }
);

in backend C# I'm using newtonsoft for deserializing the data.