Develop Reference

Javascript get JSON value from URL error

im using the function below to get image names. I also use the json code to get data of a different url, but somehow it isnt working at this. (im new to javascript. Just writing php normally.
function getImgname(name) {
$.getJSON("http://url.com/info.php?name="+name, function(json321) {
return json321.js_skininfo;
});
}

Try this:
function getImgname(myName) {
$.ajax({
url: 'http://url.com/info.php',
data: {
name: myName
},
type: 'POST',
dataType: 'json',
success: function(data) {
// do what you want with your data
return data.js_skininfo;
}
});
}

I tried this now:
function getImgname(myName) {
$.ajax({
url: "http://url.com/ninfo.php",
type: 'POST',
dataType: 'json',
success: function (data) {
return data.js_skininfo;
},
error: function () {
}
});
}
This isnt working (undefinied), but if i alert the data.js_skininfo it shows me the correct value.

php sending values to ajax faild error

I Am trying to send value from ajax to php and retrieve it just to test that everything is work, when i click in a button to test i got error and alert('Failed') Appears , how can i fix it in order to get success? thanks
Ajax :
var a = "test";
$.ajax({
url: "search.php",
dataType: "json",
data: a ,
success: function(data) {
alert('Successfully');
},
error: function(data) {
alert('Failed');
}
})
PHP :
<?php
$pictures = "img1";
echo json_encode($pictures);
?>

I refined your code slightly and it works.
var a = "test";
$.ajax({
type: 'POST',
url: 'search.php',
data: 'a=' + a,
dataType: 'json',
cache: false,
success: function (result) {
alert('Successful');
},
error: function (result) {
alert('Failed');
}
});

If you're requesting a JSON, use the $.getJSON from jQuery, it's aready parse the JSON into a JSON object for you.
Seems that you're not return an actual JSON from server, maybe this is what is causing the error.
If you're seeing the 'Failed' message probably the problem is a 500 error which is a server error.
Try this code above.
Javascript:
var a = "test";
$.getJSON("search.php", {
a: a
}, function (json) {
console.log(json);
});
PHP:
<?php
$pictures = ["img1"];
echo json_encode($pictures);
The only way to this not work, is if you have a huge mistake on you webserver configuration.

Your ajax is wrong, it should be:
var a = "test";
$.ajax({
type: "POST",
url: "search.php",
dataType: "json",
data: {a:a},
success: function(data) {
alert('Successfully');
},
error: function(data) {
alert('Failed');
}
});

Web service receiving null with jQuery post JSON

The web service on http://localhost:57501/api/addDatabase has the following code.
[System.Web.Mvc.HttpPost]
public ActionResult Post(addDatabase pNuevaConeccion)
{
pNuevaConeccion.insertarMetaData();
return null;
}
The Ajax function is on a javascript that creates the JSON from the give values on http://localhost:1161/CreateServer.
$(document).ready(function ()
{
$("#createServer").click(function (e) {
e.preventDefault(); //Prevent the normal submission action
var frm = $("#CreateServerID");
var dataa = JSON.stringify(frm.serializeJSON());
console.log(dataa);
$.ajax({
type: 'POST',
url: 'http://localhost:57501/api/addDatabase/',
contentType: 'application/json; charset=utf-8',
crossDomain: true,
//ContentLength: dataa.length,
data: dataa,
datatype: 'json',
error: function (response)
{
alert(response.responseText);
},
success: function (response)
{
alert(response);
if (response == "Database successfully connected") {
var pagina = "/CreateServer"
location.href = pagina
}
}
});
});
});
When I run this code an alert pops up saying "undefined" but if I delete the contentType the alert doesn't show up. The problem is that the variables that the function Post (from the web service) receives are NULL even though I know that the JSON named dataa is not NULL since I did a console.log.
I have seen various examples and pretty much all of them say that I should use a relative URL but the problem is that since there are 2 different domains and when I tried it, it couldn't find the URL since it's not in the same localhost.

Web service should return a JSON format instead of null. like below example.
public JsonResult Post()
{
string output = pNuevaConeccion.insertarMetaData();
return Json(output, JsonRequestBehavior.AllowGet);
}

try to use this code for calling the web method
$.ajax({
method: "POST",
contentType: "application/json; charset=utf-8",
data: dataa,
url: 'http://localhost:57501/api/addDatabase/',
success: function (data) {
console.log(data);
},
error: function (error) {
console.log(error);
}
});

its my old code.(ensure action parameter variable name and post variable name are same)
$('#ConnectionAddres_ZonesId').change(function () {
var optionSelected = $(this).find("option:selected");
var id = { id: optionSelected.val() };
$.ajax({
type: "POST",
url: '#Url.Action("GetParetArea", "Customers")',
contentType: "application/json;charset=utf-8",
data: JSON.stringify(id),
dataType: "json",
success: function (data) {
$('#ConnectionAddres_ParentAreaId').empty().append('<option value="">Select parent area</option>');
$.each(data, function (index, value) {
$('#ConnectionAddres_ParentAreaId').append($('<option />', {
value: value.Id,
text: value.Area
}));
});
},
});
});
public ActionResult GetParetArea(int id)
{
var parents="";
return Json(parents, JsonRequestBehavior.AllowGet);
}

not able to pass value using ajax in php file

I am not able to pass value using ajax in php file.
Corrected Code
<script>
$("body").on('change', '#area', function () {
//get the selected value
var selectedValue = $(this).val();
//make the ajax call
$.ajax({
url: 'box.php',
type: 'POST',
data: {option: selectedValue},
success: function () {
console.log("Data sent!");
}
});
});
</script>
here the php code
<?php $val=$_POST['option'];echo $val; ?>

There are a few problems here:
It should be url, not rl. Also, you have type: POST' with it ending in a ', but no starting '.
It should be type: 'POST'.
It should then look like this:
$("body").on('change', '#area', function() {
var selectedValue = this.value;
$.ajax({
url: 'box.php',
type: 'POST',
data: {
option : selectedValue
},
success: function() {
console.log("Data sent!");
}
});
});
If you want to view your data on the same page after (as on box.php, you are echo'ing the value.), you can do this:
success: function(data) {
console.log(data);
}
This will then write in the console what option is, which is the value of #area.

Try the following code
$("body").on('change',function(){
$.ajax({
URL:<you absolute url>,
TYPE:POST,
Data:"variable="+$("#area").val(),
Success:function(msg){
<do something>
}
});
});
Hope this will help you in solving your problem.

Your just miss ajax method parameter spelling of 'url' and single quote before value of type i.e. 'POST'. It should be like
$.ajax({
url: 'box.php',
type: 'POST',
data: {option : selectedValue},
success: function() { console.log("Data sent!");}
});

How to check ajax return value

I have an ajax call and it retunrs some value. Now i need to check the value in javascript. How can i do it
$('#cm').blur(function () {
var cmnumber = document.forms['myform']['cm'].value;
$.ajax({
type: 'get',
url: "/validatecm/" + cmnumber,
cache: false,
asyn: false,
data: cmnumber,
success: function (data) {
alert(data)
},
error: function (data) {
alert(data)
}
})
});
Now i need to access the "data" in my javascript submitformfunction. Any help wil be appreciated

success: function(data) {
console.log(data);
useInAnotherFunction(data);
}
function useInAnotherFunction(data)
{
...use here
}
If you use console.log(data); you can view clearly data what you have

You are already accessing the data here
alert(data)
If you still want to access it outside your success callback then make it like this
success: function(data) {
YourFunctionCall(data)
}