Passing A List Of Objects Into An MVC Controller Method Using jQuery Ajax

Question

I\'m trying to pass an array of objects into an MVC controller method using jQuery\'s ajax() function. When I get into the PassThing() C# controller method, the argument \"t

Answer 1

Wrapping your list of objects with another object containing a property that matches the name of the parameter which is expected by the MVC controller works. The important bit being the wrapper around the object list.

$(document).ready(function () {
    var employeeList = [
        { id: 1, name: 'Bob' },
        { id: 2, name: 'John' },
        { id: 3, name: 'Tom' }
    ];      

    var Employees = {
      EmployeeList: employeeList
    }

    $.ajax({
        dataType: 'json',
        type: 'POST',
        url: '/Employees/Process',
        data: Employees,
        success: function () {          
            $('#InfoPanel').html('It worked!');
        },
        failure: function (response) {          
            $('#InfoPanel').html(response);
        }
    }); 
});


public void Process(List<Employee> EmployeeList)
{
    var emps = EmployeeList;
}

public class Employee
{
    public int Id { get; set; }
    public string Name { get; set; }
}

Answer 2

Formatting your data that may be the problem. Try either of these:

data: '{ "things":' + JSON.stringify(things) + '}',

Or (from How can I post an array of string to ASP.NET MVC Controller without a form?)

var postData = { things: things };
...
data = postData

Answer 3

This is working code for your query,you can use it.

Controler

    [HttpPost]
    public ActionResult save(List<ListName> listObject)
    {
    //operation return
    Json(new { istObject }, JsonRequestBehavior.AllowGet); }
    }

javascript

  $("#btnSubmit").click(function () {
    var myColumnDefs = [];
    $('input[type=checkbox]').each(function () {
        if (this.checked) {
            myColumnDefs.push({ 'Status': true, 'ID': $(this).data('id') })
        } else {
            myColumnDefs.push({ 'Status': false, 'ID': $(this).data('id') })
        }
    });
   var data1 = { 'listObject': myColumnDefs};
   var data = JSON.stringify(data1)
   $.ajax({
   type: 'post',
   url: '/Controller/action',
   data:data ,
   contentType: 'application/json; charset=utf-8',
   success: function (response) {
    //do your actions
   },
   error: function (response) {
    alert("error occured");
   }
   });

Answer 4

Modification from @veeresh i

 var data=[

                        { id: 1, color: 'yellow' },
                        { id: 2, color: 'blue' },
                        { id: 3, color: 'red' }
                        ]; //parameter
        var para={};
        para.datav=data;   //datav from View


        $.ajax({
                    traditional: true,
                    url: "/Conroller/MethodTest",
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    data:para,
                    success: function (data) {
                        $scope.DisplayError(data.requestStatus);
                    }
                });

In MVC



public class Thing
    {
        public int id { get; set; }
        public string color { get; set; }
    }

    public JsonResult MethodTest(IEnumerable<Thing> datav)
        {
       //now  datav is having all your values
      }

Answer 5

I have perfect answer for all this : I tried so many solution not able to get finally myself able to manage , please find detail answer below:

       $.ajax({
            traditional: true,
            url: "/Conroller/MethodTest",
            type: "POST",
            contentType: "application/json; charset=utf-8",
            data:JSON.stringify( 
               [
                { id: 1, color: 'yellow' },
                { id: 2, color: 'blue' },
                { id: 3, color: 'red' }
                ]),
            success: function (data) {
                $scope.DisplayError(data.requestStatus);
            }
        });

Controler

public class Thing
{
    public int id { get; set; }
    public string color { get; set; }
}

public JsonResult MethodTest(IEnumerable<Thing> datav)
    {
   //now  datav is having all your values
  }

Answer 6

What I did when trying to send some data from several selected rows in DataTable to MVC action:

HTML At the beginning of a page:

@Html.AntiForgeryToken()

(just a row is shown, bind from model):

 @foreach (var item in Model.ListOrderLines)
                {
                    <tr data-orderid="@item.OrderId" data-orderlineid="@item.OrderLineId" data-iscustom="@item.IsCustom">
                        <td>@item.OrderId</td>
                        <td>@item.OrderDate</td>
                        <td>@item.RequestedDeliveryDate</td>
                        <td>@item.ProductName</td>
                        <td>@item.Ident</td>
                        <td>@item.CompanyName</td>
                        <td>@item.DepartmentName</td>
                        <td>@item.ProdAlias</td>
                        <td>@item.ProducerName</td>
                        <td>@item.ProductionInfo</td>
                    </tr>
                }

Button which starts the JavaScript function:

 <button class="btn waves-effect waves-light btn-success" onclick="ProcessMultipleRows();">Start</button>

JavaScript function:

  function ProcessMultipleRows() {
            if ($(".dataTables_scrollBody>tr.selected").length > 0) {
                var list = [];
                $(".dataTables_scrollBody>tr.selected").each(function (e) {
                    var element = $(this);
                    var orderid = element.data("orderid");
                    var iscustom = element.data("iscustom");
                    var orderlineid = element.data("orderlineid");
                    var folderPath = "";
                    var fileName = "";

                    list.push({ orderId: orderid, isCustomOrderLine: iscustom, orderLineId: orderlineid, folderPath: folderPath, fileName : fileName});
                });

                $.ajax({
                    url: '@Url.Action("StartWorkflow","OrderLines")',
                    type: "post", //<------------- this is important
                    data: { model: list }, //<------------- this is important
                    beforeSend: function (xhr) {//<--- This is important
                      xhr.setRequestHeader("RequestVerificationToken",
                      $('input:hidden[name="__RequestVerificationToken"]').val());
                      showPreloader();
                    },
                    success: function (data) {

                    },
                    error: function (XMLHttpRequest, textStatus, errorThrown) {

                    },
                     complete: function () {
                         hidePreloader();
                    }
                });
            }
        }

MVC action:

[HttpPost]
[ValidateAntiForgeryToken] //<--- This is important
public async Task<IActionResult> StartWorkflow(IEnumerable<WorkflowModel> model)

And MODEL in C#:

public class WorkflowModel
 {
        public int OrderId { get; set; }
        public int OrderLineId { get; set; }
        public bool IsCustomOrderLine { get; set; }
        public string FolderPath { get; set; }
        public string FileName { get; set; }
 }

CONCLUSION:

The reason for ERROR:

"Failed to load resource: the server responded with a status of 400 (Bad Request)"

Is attribute: [ValidateAntiForgeryToken] for the MVC action StartWorkflow

Solution in Ajax call:

  beforeSend: function (xhr) {//<--- This is important
                      xhr.setRequestHeader("RequestVerificationToken",
                      $('input:hidden[name="__RequestVerificationToken"]').val());
                    },

To send List of objects you need to form data like in example (populating list object) and:

data: { model: list },

type: "post",