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ASP.NET MVC JSON get value with two Parameters

I am trying to get value based on 2 parameters, below is my function where I added my 2 parameters in JSON stringify :
function GetItemLocationOnHand(itemId, locationId) {
var data = JSON.stringify({
itemId: itemId,
locationId: locationId
});
$.ajax({
async: true,
type: 'GET',
dataType: 'JSON',
contentType: 'application/json; charset=utf-8',
data: data,
url: 'getItemInventory3',
success: function (data) {
$("#txtInventory3").val(parseFloat(data).toFixed(2));
},
error: function () {
alert("Error")
}
});
}
Below is my code in my controller to retrieve the data I want based on these two parameters :
[HttpGet]
public JsonResult GetItemLocationOnHand(int itemId, int locationId)
{
var itemLocQuantity = objDB.ItemLocationDatas.Single(items => items.ItemId == itemId && items.LocationId == locationId).Quantity;
return Json(itemLocQuantity, JsonRequestBehavior.AllowGet);
}
Upon calling this function via below on change code, I can't seem to get my data and is always returning the error.. If I only have 1 parameter, then no error encountered.
Please advise what went wrong when trying to pass 2 parameters.
$("#LocationId").change(function () {
var itemId = $("#ItemId").val();
var locationId = $("#LocationId").val();
GetItemLocationOnHand(itemId, locationId)
});

Issue solved by doing the following :
added correct URL which is GetItemLocationOnHand
removed Stringify and used var data = ({ itemId: itemId, locationId:
locationId });
thanks a lot to Freedom and Reflective and others for your comments!
function GetItemLocationOnHand(itemId, locationId) {
var data = ({ itemId: itemId, locationId: locationId });
$.ajax({
async: true,
type: 'GET',
dataType: 'JSON',
contentType: 'application/json; charset=utf-8',
data: data,
url: 'getItemLocationOnHand',
success: function (data) {
$("#txtInventory3").val(parseFloat(data).toFixed(2));
},
error: function () {
alert("Error")
}
});
}

Just to avoid some misunderstanding how AJAX GET works and setting some parameters which you don't have to set (i.e. you are still not so deep into jQuery AJAX) you may use the shortcut they also implemented i.e. $.get so your request will look as simple as that and you can't get wrong as it will use the proper defaults for GET. If you want the response to be treated as JSON, just set Content-type of your response headers (from backed) to application/json. This will be checked by jQuery AJAX response handler and it will parse the incoming data as JSON.
var data = {itemId: 1, locationId: 2 };
$.get('GetItemLocationOnHand', data, function (data) {
$("#txtInventory3").val(parseFloat(data).toFixed(2));
}).fail(function (jqXHR, textStatus ) {
alert(`Error = ${jqXHR.status} ${textStatus}`);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

See my example below. This works for me when doing ajax requests to a MVC controller with multiple params.
Below is my MVC controller action with multiple params.
// GET
[HttpGet]
public ActionResult Index(string referenceID, int typeID, int supplierID, bool isArchived)
{
// Do CODE here
}
Below is my Ajax request that I use to get or post. Depending on your needs. I use data type 'JSON' and format my data as a JSON object.
var formData = {referenceID: 'Test', typeID: 3, supplierID: 2, isArchived: false};
$.ajax({
type: 'GET',
cache: false,
url: getActionUrl, // url: domain/controller/action |or| domain/area/controller/action
dataType: 'json',
contentType: 'application/json; charset=utf-8',
headers: headers, // ignore if not needed. I use it for __RequestVerificationToken
data: formData,
success: function (data, status, xml) {
// do something with the data
},
error: function (xml, status, error) {
console.log(xml)
// do something if there was an error
},
complete: function (xml, status) {
}
});
I think your issue might be that you are using 'JSON.stringify'. It could be interpreting your JSON string as a single parameter input and not two separate parameters.
Please see below snippets from documentation. https://api.jquery.com/jquery.ajax/
If json is specified, the response is parsed using jQuery.parseJSON before being passed, as an object, to the success handler. The parsed JSON object is made available through the responseJSON property of the jqXHR object.
The data option can contain either a query string of the form key1=value1&key2=value2, or an object of the form {key1: 'value1', key2: 'value2'}. If the latter form is used, the data is converted into a query string using jQuery.param() before it is sent. This processing can be circumvented by setting processData to false. The processing might be undesirable if you wish to send an XML object to the server; in this case, change the contentType option from application/x-www-form-urlencoded to a more appropriate MIME type.

Ajax call to MVC controllers

I'm trying to pass some data with ajax call to a c# mvc controller. Even though the task should be straight forward, I am unable to get the mvc controller to read the data I'm passing through the ajax call....
I've implemented the following code within my MVC controller
[HttpPost]
public string tt(string o)
{
return o;
}
[HttpPost]
public string tt2(string o)
{
return "lala";
}
And I'm triggering the following ajax calls from the browser
$.ajax({
url: "/Home/tt2",
type: "POST",
contentType: "application/json;",
data: JSON.stringify({ o: 'asdas'}),
success: function(e){console.log(e+' correct');},
error: function(e){console.log(e+' incorrect');}
});
$.ajax({
url: "/Home/tt",
type: "POST",
contentType: "application/json;",
data: JSON.stringify({ o: 'asdas'}),
success: function(e){console.log(e+' correct');},
error: function(e){console.log(e+' incorrect');}
});
As a result when running the first ajax call the result is
lala correct
And for the second ajax call, the result is
undefined correct
In the mean time these are some stuff I tried
Adding dataType: "json", to the ajax call
Changing the string data from {o: 'asdas'} to 'asdas'
Removing the JSON.stringify
Adding the charset=utf-8 to the contentType
Changing the ajax call type and MVC controller method from POST to GET to PUT
Changing the MVC controller method parameter from string to int
Removing the error method from the ajax call
Changing the data from data: {o: 'asdas'} to data: {"o":"asdas"}
Changing the data from data: {"o":"asdas"} to data: JSON.stringify({"o":"asdas"})
I know that simple string or int can be passed through the URL as query strings but it would be an issue when passing a list of objects..
Something aside is that the call is being done correctly to the URL because when I set a breakpoint within the called method, it does get triggered but the parameter always is null..
Any thoughts on how to make ajax call work?

try:
[HttpPost]
public string tt([FromBody]string o)
{
return o;
}

Your request should be like this:
$.ajax({
url: '#Url.Action("tt", "Home")',
data: {
"o": "asdasdas"
},
cache: false,
type: "POST",
success: function (response) {
},
error: function (xhr) {
}
});

ajax post data is null in controller asp.net mvc 5

I try to send a JSON object back to the server. This is my AJAX call
function SaveData() {
var model = []
debugger
$.each($('.Money'), function (i, item) {
model.push({
Money: $('.Money').eq(i).val(),
Day: $('.Day').eq(i).val(),
Note: $('.Note').eq(i).val()
});
})
$.ajax({
url: '#Url.Action("Create")',
contentType: "application/json",
async: true,
data: { partnerDeposit: JSON.stringify(model) },
type: 'POST',
dataType: 'json',
succsess: function () {
}
})}
This is the method in the controller which is being called:
enter image description here
https://i.stack.imgur.com/FqEt9.png
The problem I have is that always the json variable from above is an empty object. The success function gets called but when I debug the json var is displayed as empty.
Please tell me what I am doing wrong. Thank you.

Try adding the partnerDeposit to the JSON.stringify call like this:
$.ajax({
url: '#Url.Action("Create")',
contentType: "application/json",
async: true,
data: JSON.stringify({partnerDeposit: model}),
type: 'POST',
dataType: 'json',
succsess: function () {
}
})

I haven't found this answer anywhere else so I had to discover it through experimentation. Hopefully this will help someone.
You'll find that in your controller, it's receiving a Request.Form object and if you look in Request.Form[0] you'll find your data. The reason that there's data in the form but MVC is seeing it as null is that the key to the form element being POSTed is "" (blank).
So client side, you have to set content type properly, and precede your data with something like "myData=" + JSON.stringify(myJSONObject), where "myData" is the key name you are adding, like so:
$.ajax({
type: "POST",
url: URL,
data: "myData="+JSON.stringify(myJSONObject),
contentType: "application/x-www-form-urlencoded; charset=utf-8"
On the server side, your [HttpPost] endpoint has to have as its input a variable with the same name as the key you declared in your AJAX, like so:
`
[HttpPost]
[Authorize]
public ActionResult Index (string myData) // <-- var name matches AJAX
{
// de-serialize data into server-side object using
// JSONConvert.DeserializeObject
}
`

MVC3 Controller not receiving any parameter values

Using JQuery, I am passing values to an action in the controller. customerId and productId are not null:
$.ajax({
type: "GET",
url: "Customer/Product/",
data: { Customer: customerID, Product: productId},
dataType: "json",
error: function (xhr, status, error) {
// you may need to handle me if the json is invalid
// this is the ajax object
},
success: function (json) {
$("#productName").innerHTML = json;
alert(json);
alert($("#startDate").innerHTML);
}
});
In MVC3 controller, i have the action:
public ActionResult Product(string Customer, string Product)
{
//both are null
}
I don't know why both are null? Please guide

$.ajax({
type: "GET",
url: "Customer/Product/",
data: "Customer="+customerID +"&Product="+productId,
dataType: "json",
error: function (xhr, status, error) {
// you may need to handle me if the json is invalid
// this is the ajax object
},
success: function (json) {
$("#productName").innerHTML = json;
alert(json);
alert($("#startDate").innerHTML);
}
});
Try this way.

MVC may be expecting a JSON string. Try using this as your data
data: JSON.stringify({ Customer: customerID, Product: productId})

If you change it to a "POST" request it should work.
However it looks like you are actually trying to just "GET" data from the server which should really be encoded in your URL e.g. mysite.com/Customer/{customer_id}/Product/{product_id}. In this case you'll probably need to change your routing rules.

I just did "File -> New Project" and just added the one controller and tried directly using:
var customerID = 42;
var productId = 4242;
$.ajax({
type: "GET",
url: "http://localhost:51622/Customer/Product",
data: { Customer: customerID, Product: productId},
dataType: "json",
error: function (xhr, status, error) {
// you may need to handle me if the json is invalid
// this is the ajax object
},
success: function (json) {
console.log(json);
}
});
It binds the values just fine, so you might want to grab fiddler or something similiar and make sure that you are actually sending values to the server.

asp.net mvc 3 highchart

In addition to my previous question, I tried to use the same working code (for MVC2) in a MVC3 project. I figured out it's not possible to use the jQuery.getJSON method. So I tried to use the $.post and $.ajax method instead, but again facing a problem.
In both methods I get an error "Jscript: JB is empty or not an object"
$.post("Home/GetLineData", null, function (items) {
var series = [];
jQuery.each(items, function (itemNo, item) {
//Get the items from the JSON and add then
//to the data array of the series
series.push({
name: item.Key,
data: item.Value
})
});
options.series = series;
chart = new Highcharts.Chart(options);
chart.render();
});
$.ajax({
type: "POST",
dataType: "json",
data: "{}",
contentType: "application/json; charset=utf-8",
url: "/Home/GetLineData",
cache: false,
succes: function (data) {
var series = [];
jQuery.each(data, function (itemNo, item) {
//Get the items from the JSON and add then
//to the data array of the series
series.push({
name: item.Key,
data: item.Value
})
});
options.series = series;
//Create the chart
chart = new Highcharts.Chart(options);
chart.render();
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(errorThrown);
}
});
Thanks in advance for helping me out (again :-s).

The problem was in the HTML, so the container element was not found.
So now both methods are working!
Jorelie.

BTW - you can use getJSON in MVC 3.0, but your controller method has to return the JSON object with a second parameter like so :
Json(result, JsonRequestBehavior.AllowGet);