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Posting AJAX string to MVC Controller

I am trying to post a string (the name of the href the user clicked on) using AJAX to my MVC controller (which it will then use to filter my table results according to the string).
Whilst I have managed to get it to post (at-least according to the alerts) on the AJAX side, it doesn't seem to arrive properly on the controller side and is seen as null in my quick error capture (the if statement).
Please excuse the useless naming conventions for the moment. I've been going through countless methods to try and fix this, so will name properly when I've got a proper solution :).
I've been at work for this for a long while now and can't seem to solve the conundrum so any help is appreciated please! I'm very new to AJAX and MVC in general so I'm hoping it's a minor mistake. :) (FYI I have tried both post and get and both seem to yield the same result?)
Controller:
[Authorize]
[HttpGet]
public ActionResult GetSafeItems(string yarp)
{
using (CBREntities2 dc = new CBREntities2())
{
if (yarp == null)
{
ViewBag.safeselected = yarp;
}
var safeItem = dc.Items.Where(a => a.Safe_ID == yarp).Select(s => new {
Serial_Number = s.Serial_Number,
Safe_ID = s.Safe_ID,
Date_of_Entry = s.Date_of_Entry,
Title_subject = s.Title_subject,
Document_Type = s.Document_Type,
Sender_of_Originator = s.Sender_of_Originator,
Reference_Number = s.Reference_Number,
Protective_Marking = s.Protective_Marking,
Number_recieved_produced = s.Number_recieved_produced,
copy_number = s.copy_number,
Status = s.Status,
Same_day_Loan = s.Same_day_Loan
}).ToList();
// var safeItems = dc.Items.Where(a => a.Safe_ID).Select(s => new { Safe_ID = s.Safe_ID, Department_ID = s.Department_ID, User_ID = s.User_ID }).ToList();
return Json(new { data = safeItem }, JsonRequestBehavior.AllowGet);
}
}
AJAX function (on View page):
$('.tablecontainer').on('click', 'a.safeLink', function (e) {
e.preventDefault();
var yarp = $(this).attr('safesel');
var selectedSafeZZ = JSON.stringify("SEC-1000");
$.ajax({
url: '/Home/GetSafeItems',
data: { 'yarp': JSON.stringify(yarp) },
type: "GET",
success: function (data) {
alert(yarp);
console.log("We WIN " + data)
},
error: function (xhr) {
alert("Boohooo");
}
});
})
** The Alert reveals the correct type: "SEC-1000"
But the console Log shows: WE WIN [Object object]??

I have tried something basic in a new mvc dummy project :
View page basic textbox and a button :
<input type="text" id="txt_test" value="test"/>
<button type="button" class="btn" onclick="test()">Test</button>
<script type="text/javascript">
function test()
{
var text = $("#txt_test")[0].value;
$.ajax({
url: '#Url.RouteUrl(new{ action="GetSafeItems", controller="Home"})',
// edit
// data: {yarp: JSON.stringify(text)},
data: {yarp: text},
type: 'GET',
dataType: 'json',
contentType: "application/json; charset=utf-8",
success: function(data) {
// edit
// alert(JSON.stringify(data));
alert(data.data);
}});
}
</script>
Controller :
[HttpGet]
public ActionResult GetSafeItems(string yarp)
{
return Json(new {data = string.Format("Back end return : {0}",yarp)}
, JsonRequestBehavior.AllowGet);
}
Alert result => {"data":"Back end return : \"test\""}
It's a simple ajax call to a web method. You don't return a view, so I don't understand the use of
if (yarp == null)
{
ViewBag.safeselected = yarp;
}
Also I see an [Authorize] attribute, you perhaps use some authentication and I don't see any authentication header on your ajax call

Try this:
$.each(data, function (i) { console.log("We WIN " + data[i].Serial_Number )});

How can I update the Database on a checkbox change in MVC

I am trying to update my database when a checkbox is checked or unchecked. I want it to update when the checkbox is clicked. This is what I have so far, but my controller is never being hit. what can I do to fix it? Ideally I want to pass in the new value of customer.IsDone and customer.Id to my controller but I don't know how to do this.
Checkbox in my view
<td>#Html.CheckBoxFor(m => customer.IsDone, new { onclick = "UpdateCustomer(IsDone)" })</td>
The function in my view
function UpdateCustomer(isDone) {
$.ajax({
type: 'POST',
url: #Url.Action("UpdateCustomer", "Home"),
data: { check: isDone },
success: success,
dataType: 'json'
});
}
this is my controller method
[HttpPost]
public ActionResult UpdateCustomer(bool check)
{
//code will be here to update the db
var customers = new CustomerGetAll();
var list = customers.Execute();
return View("Customers", list);
}

I see few issues in your code.
First of all, you are passing IsDone variable when calling the UpdateCustomer method. But where is isDone defined ?
Second, this line,
url: #Url.Action("UpdateCustomer", "Home"),
The Url.Action helper will output a string and your code will be like this when rendered in the browser
url: /Home/UpdateCustomer,
Now the browser's javascript framework usually thinks the second part after : as a js variable and if you have not defined it,it will throw a syntax error about using a not defined variable! But since we have \, you will get another "Invalid regular expression flags" syntax error!
You should wrap the result in quotes to avoid this problem.
The below code should work
#Html.CheckBoxFor(m =>customer.IsDone, new { onclick = "UpdateCustomer(this)" })
and the script
function UpdateCustomer(elem) {
var isDone = $(elem).is(':checked');
$.ajax({
type: 'POST',
url: "#Url.Action("UpdateCustomer", "Home")",
data: { check: isDone },
success: function(res) {
console.log(res);
},
dataType: 'json'
});
}
Also, If you want to update a specific customer record, you probably want to pass the customer Id as well when making the ajax call. You may keep that in html 5 data attribute on the checkbox markup and read that and use that as needed.
#Html.CheckBoxFor(m =>customer.IsDone, new { onclick = "UpdateCustomer(this)",
data_customerid = customer.Id })
This will render the checkbox with html5 data attribute for "data-customerid". All you have to now do is, read this value and send it via ajax
function UpdateCustomer(elem) {
var isDone = $(elem).is(':checked');
var cid = $(elem).data('customerid');
$.ajax({
type: 'POST',
url: '#Url.Action("UpdateCustomer", "Home")',
data: { check: isDone,customerId:cid },
success: function(res) {
console.log(res);
}
});
}
Make sure your server action method has a new parameter to accept the customer id we are sending from client side code
[HttpPost]
public ActionResult UpdateCustomer(bool check,int customerId)
{
// to do : Save and return something
}

I have something similar, and I think you can solve your problem...
My HTML
<td>
#{
bool avalia1 = false;
#Html.CheckBox("avalia1", avalia1, new { autocomplete = "off", data_on_text = "Sim", data_off_text = "Não" })
}
</td>
JS
var avalia1 = $("#avalia1").is(":checked");
var url = "/Telefonia/GravarAvaliacao";
$.ajax({
url: url,
datatype: "json",
data: { 'avalia1': avalia1,'idgravacao': idgravacao },
type: "POST",
success: function (data) {
}
});
}
ON CONTROLLER
public JsonResult GravarAvaliacao(bool avalia1, string idgravacao)
{
string _userId = User.Identity.GetUserId();
var avaliaData = new OperadorAvaliacaoData();
avaliaData.GravaAvaliacao(avalia1, idgravacao);
return Json(true, JsonRequestBehavior.AllowGet);
}
The only diference is your model checkbox, and the action trigger.

Need to simulate an #Html.action() on a button click

I'm having some issues with updating a partial view in my index view. Basically, based on a click, I would like to have updated information.
//controller
public ActionResult Index()
{
var filteredObservations = getFilteredObservationSessions().ToList();
var observationManagementVm = new ObservationManagementVM(filteredObservations);
return View(observationManagementVm);
}
public ActionResult indexPagedSummaries(int? page, List<ObservationSessionModel> data)
{
var alreadyFilteredObservations = data;
int PageSize = 10;
int PageNumber = (page ?? 1);
return PartialView(alreadyFilteredObservations.ToPagedList(PageNumber, PageSize));
}
My main view
//index.cshtml
#model AF.Web.ViewModels.ObservationManagementVM
....
<div id="testsim">
#Html.Action("indexPagedSummaries", new { data = Model.ObservationSessions })
</div>
<input id="new-view" value="Sessions" type="button" />
<script>
$("#new-view").click(function() {
$.ajax({
type: "GET",
data: { data: "#Model.FeedBackSessions" },
url: '#Url.Action("indexPagedSummaries")',
cache: false,
async: true,
success: function (result) {
console.log(result);
$('#testsim').html(result);
$('#testsim').show();
}
});
});
</script>
....
And my partial view
//indexPagedSummaries.cshtml
#model PagedList.IPagedList<AF.Services.Observations.ObservationSessionModel>
#using (Html.BeginForm("indexPagedSummaries"))
{
<ol class="vList vList_md js-filterItems">
#foreach (var item in Model)
{
#Html.DisplayFor(modelItem => item)
}
</ol>
<div>
Page #(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber) of #Model.PageCount
#Html.PagedListPager(Model, page => Url.Action("Index",
new { page }))
</div>
}
Html.Action() returns what I want perfectly, but it doesn't seem to be able to be triggered by a button click.
So, I'm not getting any errors, but the url doesn't give any data back. When I try to run the Observation/indexPagedSummary url without passing in data, I get a System.ArgumentNullException error, so I'm assuming that something is being transferred to the view model. Any help would be so appreciated.

Have not run your code but I believe it is because you are not sending the data along with the #Url.Action
Main View:
//index.cshtml
#model AF.Web.ViewModels.ObservationManagementVM
....
<div id="testsim">
#Html.Action("indexPagedSummaries", new { data = Model.ObservationSessions })
</div>
<input id="new-view" value="Sessions" type="button" />
<script>
$("#new-view").click(function() {
$.ajax({
type: "GET",
data: { data: "#Model.FeedBackSessions" },
url: '#Url.Action("indexPagedSummaries", "[Controller Name]", new { data = Model.ObservationSessions})',
cache: false,
async: true,
success: function (result) {
console.log(result);
$('#testsim').html(result);
$('#testsim').show();
}
});
});
</script>
If that doesn't help I have had issues when I have had a content-type mismatch or a datatype mismatch. You may need to add those to you ajax request.

Change your ajax data line to this:
data: { data: JSON.stringify(#Model.FeedBackSessions) },
You may also need to add these lines to the ajax:
dataType: 'json',
contentType: 'application/json; charset=utf-8',
You can see in one of your comments above that the current URL is being formed with a description of the List Object, rather than the contents of it:
http://localhost:60985/Observation/indexPagedSummaries?data=System.Collections.Generic.List%601%5BAF.Services.Observations.ObservationSessionModel%5D&data=System.Collections.Generic.List%601%5BAF.Services.Observations.ObservationSessionModel%5D&_=1482453264080
I'm not sure if there's a better way, but you may even have to manually get the model data into Javascript before posting it.
eg:
<script>
var temp = [];
#foreach (var item in Model.FeedBackSessions){
#:temp.push(#item);
}
</script>
and then data: { data: JSON.stringify(temp) },

mvc ajax refresh div method controller json

I have a method in the controller that return a ViewBag with Json.
public JsonResult FilterCheck(int id, int[] mycheck, string idprot)
{
ViewBag.Utenti = this.GetDbContext().utente.Include(s => s.cod_servizio_utente).Where(x => x.cod_servizio_utente.Select(l => l.id).Contains(5)).ToList();
return Json(ViewBag.Utenti, JsonRequestBehavior.AllowGet);
}
In the view I have this script function ajax, if this function have "success" i would refresh a div that include a foreach on the viebag.Utenti:
$.ajax({
type: "POST",
url: "#Url.Action("FilterCheck","Operatore")",
datatype: "json",
traditional: true,
data: { 'mycheck': mycheck, 'idprot': idprot, 'id': '#Model.id' },
success: function(data) {
var html = $(data).filter('#external-events').html();
$('#external-events').html(data);
}
});
<div id='external-events'>
#foreach (HAnnoZero.Repositories.utente item in ViewBag.Utenti)
{
<div class='col-lg-3'><div class='external-event'>#item.id- #item.cognome #item.nome</div></div>
} </div>
But dont work. How can do for refresh the foreach inside div id "external events"?Who could help me?

Firstly you do not need to assign the collection to ViewBag
public ActionResult FilterCheck(int id, int[] mycheck, string idprot)
{
var data = this.GetDbContext().utente.Include(......
// Build anonymous object collection to avoid circular reference errors
var response = data.Select(d => new
{
id = d.id,
cognome = d.cognome
// other properties as required
});
return Json(response);
}
Secondly you are returning JSON, not html, so in your success function you need to iterate through the properties and build your html (not sure what your properties are, so adjust as necessary)
success: function(data) {
$('#external-events').empty(); // clear existing items
$.each(data, function(index, item) {
var div = $('<div><div>'); // Create new element
div.text(item.id + ' ' + item.cognome); // Set inner text
$('#external-events').append(div); // add the new element
});
}
An alternative is to have the action method return a partial view containing the html and then use
success: function(data) {
$('#external-events').html(data);
}

How to pass a JavaScript Array to ASP.Net MVC Action as part of post

I have a cshtml as follow,
DoPost.cshtml
#using (Html.BeginForm("Purchase", "PurchaseOrder", FormMethod.Post, new { #id = "frmPurchase" }))
{
// statements
// statements
<input type="button" id="submitPurchase" onclick = "myPurchase()" value="Select" />
}
In Javascript I have an array strings in variable "ExtraItems"
ExtraItems[0] ="123"
ExtraItems[1] ="124"
ExtraItems[2] ="125"
My Action which accept the data is as follows,
public ActionResult Purchase(PurchaseOrderModel model)
{
//Do some stuff with the passed data
return View("Purchase", model);
}
In the above PurchaseOrderModel, I have the property
public string[] SelectedProducts { get; set; }
to accept the Javascript Array elements.
What I tried:
The simple post did not work as the JavaScript array elements are not part of the Form elements,I couldn't use a #Html.HiddenFor because it is an array.
Hence tried to do an Ajax post under function myPurchase(),
$a.post('#Url.Action("Purchase", "PurchaseOrder")', { SelectedProducts: ExtraItems });
Here I did not get the ExtraItems details under model.SelectedProducts in the action. The biggest issue was i wanted to load the Purchase.cshtml View from the action, instead I got the controll back to the Jquery Post.
Please help me how can I solve this.

You should post your javascript array as a json object. You use the JSON.stringify() method converts a value to JSON. Something like :
$.ajax({
url: '#Url.Action("Purchase", "PurchaseOrder")',
type: 'POST',
contentType: 'application/json',
data: JSON.stringify({
SelectedProducts: ExtraItems
})
});

Here is my example for solving your issue
-----------------------------------------
//Script
#{
ViewBag.Title = "Index";
}
<h2>Index</h2>
<script>
var ExtraItems = ["aa","bb","cc","ff"];
function a()
{
$.ajax( {
type: 'POST',
url: '/Default1/Index',
data: { SelectedProducts: ExtraItems },
traditional: true,
success: function ( response )
{
alert( 'Sucs' );
}
} );
}
</script>
<button onclick="a();">click</button>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.js"></script>
//Controller
[HttpPost]
public ActionResult Index( string[] SelectedProducts )
{
return View();
}

Take a string property in your model and then send the data as comma separated string
var dataToSent = ExtraItems.join(',')
If you have a property named Datum of type string in your model Purchase then the data to be sent will be, passing model
data : 'Datum=' + dataToSent
In your action you can split data into array
also for return response you have to redirect the page in the success function of your ajax call
$.ajax( {
type: 'POST',
url: '/Default1/Index',
data: { SelectedProducts: ExtraItems },
traditional: true,
success: function ( response )
{
window.location.href = "/controller/action" <--your url
}
} );

Use $.ajax function with the option traditional:true for enabling ASP.NET MVC default model binding for the list of string items.