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Send data from jquery ajax request not working

I have a post request from jquery ajax to a ActionResult method as follow :
$("#itemTextbox, #itemTextboxNew, #quantity1Textbox").on("keydown", function (e) {
if ((e.keyCode == 120){
var GetReportLast5SellAndBuyURL="/Trd/SellInvoice/GetReportLast5SellAndBuy";
itemCode = $(this).val();
$.ajax({
type: "POST",
url: GetReportLast5SellAndBuyURL,
data: {ItemCode:itemCode},
//contentType: "application/json; charset=utf-8",
context: this,
processData: false
}).done(function (msg) { ... somethings ...});}
And in controller, ActionResult is :
[HttpPost]
public ActionResult GetReportLast5SellAndBuy(string ItemCode)
{ ... somthings ...}
But when ActionResult is called " ItemCode " is null... What's wrong with this chapter?
I tried different forms of this recipe, but the problem is still there..

try this:
$.ajax({
type: "POST",
url: GetReportLast5SellAndBuyURL,
data: JSON.stringify({ItemCode:itemCode}),
datatype: "JSON",
contentType: "application/json; charset=utf-8",
processData: false
}).done(function (msg) { ... somethings ...});}

Just comment processData:false in your script
$("#itemTextbox, #itemTextboxNew, #quantity1Textbox").on("keydown", function (e) {
if ((e.keyCode == 120){
var GetReportLast5SellAndBuyURL="/Trd/SellInvoice/GetReportLast5SellAndBuy";
itemCode = $(this).val();
$.ajax({
type: "POST",
url: GetReportLast5SellAndBuyURL,
data: {ItemCode:itemCode},
//contentType: "application/json; charset=utf-8",
context: this
// processData: false
}).done(function (msg) { ... somethings ...});}
well explained at [Setting processData to false in jQuery breaks my AJAX request

$("#itemTextbox, #itemTextboxNew, #quantity1Textbox").on("keydown", function (e) {
if ((e.keyCode == 120){
$.ajax({
type: "POST",
url: "/Trd/SellInvoice/GetReportLast5SellAndBuy?ItemCode="+$(this).val(),
contentType: "application/json",
context: this,
datatype: "JSON",
processData: false
}).done(function (msg) { ... somethings ...});}
// OR
$("#itemTextbox, #itemTextboxNew, #quantity1Textbox").on("keydown", function (e) {
if ((e.keyCode == 120){
$.ajax({
type: "POST",
url: "/Trd/SellInvoice/GetReportLast5SellAndBuy",
contentType: "application/json",
data:JSON.stringify({ItemCode:$(this).val()})
datatype: "JSON",
context: this,
processData: false
}).done(function (msg) { ... somethings ...});}

Toggle switch to call url but not open it

I have a toggle switch on my html which i would like to enable/disable a relay in arduino with.
On: call http://192.168.1.144:8000/1234!Q02=0$
Off: call http://192.168.1.144:8000/1234!Q02=1$
I don't want the url to be opened, i just want it to be called.
function getValue1() {
var isChecked = document.getElementById("button1").checked;
if(isChecked){
alert("button1 is checked");
} else {
alert("button1 is NOT checked");
}
}
My javascript code is working, but i dont know how to call the url.
Thanks.

you can also try this.
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("#btnCall").click(function(){
if($("button1").prop('checked')){
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "http://192.168.1.144:8000/1234!Q02=0$",
data: JSON.stringify(data), //yourData
success: function (data) {
console.log(data);
},
dataType: "json"
});
} else {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "http://192.168.1.144:8000/1234!Q02=1$",
data: JSON.stringify(data), //yourData
success: function (data) {
console.log(data);
},
dataType: "json"
});
}
});
});
</script>

Button:
$(document).ready(function() {
$("#btnCall").click(function(){
var isChecked = document.getElementById("button1").checked;
if(isChecked){
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "http://192.168.1.144:8000/1234!Q02=0$",
data: JSON.stringify(data), //yourData
success: function (data) {
console.log(data);
},
dataType: "json"
});
} else {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "http://192.168.1.144:8000/1234!Q02=1$",
data: JSON.stringify(data), //yourData
success: function (data) {
console.log(data);
},
dataType: "json"
});
}
});
});

AJAX: How to get array on multi dimensional array

I have a json which is . I just want to get specific data which is
obj['contacts']['name']
How can i get
obj['contacts']['name']
name on Contacts array
This is my code:
$.ajax({
type: 'GET',
dataType: 'json',
url: uri,
cache: false,
contentType: 'application/json',
success: function(data) {
for (var obj in data) {
console.log(obj['contacts']['name']);
}
}
});

In your case this is how you want get name from contacts
$.ajax({
type: 'GET',
dataType: 'json',
url: uri,
cache: false,
contentType: 'application/json',
success: function(data) {
if (!data.contacts) return;
var names = data.contacts.map(function(dt) {
return dt.name;
});
console.log(names);
}
});

Just enumerate the returned object "contacts" property:
$.ajax({
type: 'GET',
dataType: 'json',
url: uri,
cache: false,
contentType: 'application/json',
success: function(data) {
data.contacts.forEach(function(contact) {
console.log(contact.name);
});
}
});

How to access the data from an ajax call outside the function itself

This code gets a json object from another server.
How do I access the response outside of the function?
(function($) {
$.ajax({
type: 'GET',
url: url,
async: false,
jsonpCallback: 'callback',
contentType: "application/json",
dataType: 'jsonp',
success: function(json) {
var data = json;
}
})
})(jQuery);

You can do something like this!
_outerMethod: function(data) {
//...do what you need to do
}, (function($) {
$.ajax({
type: 'GET',
url: url,
async: false,
jsonpCallback: 'callback',
contentType: "application/json",
dataType: 'jsonp',
success: function(json) {
_outerMethod(json);
}
})
})(jQuery);

Converting $.post into $.ajax

I have a post statement,
$.post("panel.php", 'data=[{"action":"UserInfo"}]', function (userInfo){
//processing
});
I need it to be converted to $.ajax so made it thus,
$.ajax({
type: "POST",
url: "panel.php",
data: { data: [{"action":"UserInfo"}]},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(userInfo) {
//processing
}
});
But the post variable isn't being sent. Is this not the correct way?

Can you try something like this:
$.ajax({
type: "POST",
url: "panel.php",
data: {"action":"UserInfo"},
success: function(userInfo) {
//processing
}
});

Try this
$.ajax({
type: "POST",
url: "panel.php",
data: "action="+"UserInfo",
success: function(userInfo) {
//processing
}
});

Remove data from your data and keep it in a variable, stringify before your send as below
var data={"action":"UserInfo"};
$.ajax({
type: "POST",
url: "panel.php",
data: JSON.stringify(data),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(userInfo) {
//processing
}
});

Your data attribute was not written as correct JSON:
data: { "data": [{"action":"UserInfo"}]},
You need quotation marks around the items inside your JSON object. You can use JSONLint to check if your JSON object is valid.

$.ajax({
type: "POST",
url: "panel.php",
data: {"action":"UserInfo"},
dataType: "json",
success: function(userInfo) {
//processing
}
});
Need a small change. there is a predefined format to send data in ajax,
data: {status: status, name: name},
data: "status="+status+"&name="+name.
Follow any one of the approach.

try like this,
$.ajax({
type: "POST",
url: "panel.php",
data: {"action":"UserInfo"},
success: function(userInfo) {
}
});