I tried to find a workaround all morning(browsered every related post in SO & did several experiments myself), but failed.
Here's the Server code:
Controller:
[HttpGet]
public JsonResult Test(Entity e)
{
return Json(new { success = true }, JsonRequestBehavior.AllowGet);
}
Entity:
public class Entity
{
public string A { set; get; }
public string B { set; get; }
}
With Client code:
var e = {
A: "1",
B: "2"
};
$.ajax({
url: "/Home/Test",
contentType: "application/json; charset=utf-8",
dataType: "json",
data: JSON.stringify(e)
// data: e
});
I get:
With Client Code:
var e = {
A: "1",
B: "2"
};
$.ajax({
url: "/Home/Test",
//contentType: "application/json; charset=utf-8",
dataType: "json",
//data: JSON.stringify(e)
data: e
});
I get:
Hope to find a answer, coz application/json is more useful
EDIT
The parameters can be passed correctly when i change the protocal to POST.
Here's the new question: Why not GET?? coz the converted request querystring doesnt meet mvc3's need??
EDIT2
http://forums.asp.net/t/1766534.aspx/1
It seems that all issues are on the GET method. GET shouldn't pass complex params?? That's very weird if u are fan of restFUL
Try specifying the request type (although it defaults to GET anyway):
var e = {
A: "1",
B: "2"
};
$.ajax({
type: "GET",
url: "/Home/Test",
contentType: "application/json;charset=utf-8",
dataType: "json",
data: JSON.stringify(e)
});
or, try using a POST request and decorate the JsonResult action method with the [HttpPost] attribute:
[HttpPost]
public JsonResult Test(Entity e)
{
return Json(new { success = true }, JsonRequestBehavior.AllowGet);
}
then
$.ajax({
type: "POST",
url: "/Home/Test",
contentType: "application/json;charset=utf-8",
dataType: "json",
data: JSON.stringify(e)
});
Related
I'm trying to POST an int with Ajax to my controller
Js
<script>
function FillCity() {
var provinceId = $(provinces).val();
$.ajax({
url: "FillCity",
type: "POST",
data: { id: provinceId },
dataType: "json",
traditional: true,
contentType: 'application/json; charset=utf-8',
success: function (data) {
$("#cities").html(""); // clear before appending new list
$.each(data, function (i, city) {
$("#cities").append(
$('<option></option>').val(city.Id).html(city.Name));
});
}
});
}
</script>
code in my controller :
[HttpPost]
public ActionResult FillCity(int id)
{
var cities = _context.City.Where(c => c.ProvinceId == 5);
return Json(cities);
}
but it always post 0 as id, I tried digits instead of provinceId, but it rtills send 0
You should create an class that have a Id Property.
public class ProvinceIdDto
{
public int Id { get; set; }
}
replace int id with ProvinceIdDto model in action
[HttpPost]
public ActionResult FillCity(ProvinceIdDto model)
{
var cities = _context.City.Where(c => c.ProvinceId == model.Id);
return Json(cities);
}
replace { id: provinceId } with JSON.stringify({ Id: provinceId }),
<script>
function FillCity() {
var provinceId = $(provinces).val();
$.ajax({
url: "FillCity",
type: "POST",
data: JSON.stringify({ Id: provinceId }),
dataType: "json",
traditional: true,
contentType: 'application/json; charset=utf-8',
success: function (data) {
$("#cities").html(""); // clear before appending new list
$.each(data, function (i, city) {
$("#cities").append(
$('<option></option>').val(city.Id).html(city.Name));
});
}
});
}
</script>
Another options is you can replace HttpPost method with HttpGet and pass id to action like this.
Change type: "POST", to type: "GET",
<script>
function FillCity() {
var provinceId = $(provinces).val();
$.ajax({
url: "FillCity?id="+provinceId,//<-- NOTE THIS
type: "GET",//<-- NOTE THIS
dataType: "json",
traditional: true,
contentType: 'application/json; charset=utf-8',
success: function (data) {
$("#cities").html(""); // clear before appending new list
$.each(data, function (i, city) {
$("#cities").append(
$('<option></option>').val(city.Id).html(city.Name));
});
}
});
}
</script>
C#
[HttpGet]
public ActionResult FillCity(int id)
{
var cities = _context.City.Where(c => c.ProvinceId == id);
return Json(cities);
}
when you do { id: provinceId } you are creating an object with property id
in your controller you are just expecting an id. You will need to ether:
A pass it as a query parameter url: "FillCity?id=" + provinceId
B create an object to be parsed from the request body.
public class Payload {
public int Id {get;set;}
}
and use it like this
public ActionResult FillCity([FromBody] Payload payload)
Can you verify this statement has a value:
var provinceId = $(provinces).val();
It's possible that isn't finding what you are looking for, and because you have the type int as a parameter, it defaults it to "0".
You shouldn't need to change it to a GET and your MVC method is fine as is. You can see from JQuery's own sample it should work:
$.ajax({
method: "POST",
url: "some.php",
data: { name: "John", location: "Boston" }
})
.done(function( msg ) {
alert( "Data Saved: " + msg );
});
I think it might not be finding the input field successfully.
I am migrating my MVC project to Core and I have been having a hard time fixing all the old ajax calls.
I can pass a model and string parameters into the controller, however, ints are not working for me.
I can wrap them into a JSON object as a string parameter such as [FromBody]string objId in the controller, but then I have to parse the int val from the Json {'objId' : 1}.
Is there a way I can avoid this and just pass an int?
below is the code I am trying.
[HttpPost]
public JsonResult PassIntFromView([FromBody]int objId)
{
//DO stuff with int here
}
here is the js.
var data = { "objId": 1};
$.ajax({
url: '#Url.Action("PassIntFromView", "ControllerName")',
data: JSON.stringify(data),
type: "POST",
dataType: 'JSON',
contentType: "application/json",
success: function(data) {
//do stuff with json result
},
error: function(passParams) {
console.log("Error is " + passParams);
}
});
The objId is always 0 in the controller.
I have tried this without doing JSON.stringify(data) as well with no result.
I have also tried all the different form attribute variations.
Try to use contentType as 'application/x-www-form-urlencoded':
var data = { objId: 1 };
$.ajax({
url: '#Url.Action("PassIntFromView", "ControllerName")',
type: "post",
contentType: 'application/x-www-form-urlencoded',
data: data,
success: function (result) {
console.log(result);
}
});
Then remove the [FromBody] attribute in the controller
[HttpPost]
public JsonResult PassIntFromView(int objId)
{
//Do stuff with int here
}
I believe your issue could be that you are passing an object to the api, but trying to turn it into a primitive. I know there is already a chosen answer, but give this a whirl.
var data = { };
data["objId"] = 1; //I just wanted to show you how you can add values to a json object
$.ajax({
url: '#Url.Action("PassIntFromView", "ControllerName")',
data: JSON.stringify(data),
type: "POST",
dataType: 'JSON',
contentType: "application/json",
success: function(data) {
//do stuff with json result
},
error: function(passParams) {
console.log("Error is " + passParams);
}
});
You create a model class
public class MyModel {
public int ObjId {get;set;}
}
Your controller should expect one of these
[HttpPost]
public JsonResult PassIntFromView([FromBody] MyModel data)
{
//DO stuff with int here
}
JSON has a preference for strings not integers. You are better off to use JSON.stringify(data) to parse to your controller, convert that to a integer in the controller, then parse the string that was returned as:
var data = { objId: 1};
$.ajax({
url: '#Url.Action("PassIntFromView", "ControllerName")',//asp.net - url: 'api/controllerName/controllerFunction'
data: JSON.stringify(data),
type: "POST",
dataType: 'JSON',
contentType: "application/json",
success: function(data) {
var result = JSON.parse(data);
//do stuff with json result
},
error: function(passParams) {
console.log("Error is " + passParams);
}
});
Try this:
var data = { "objId": 1};
$.ajax({
url: '#Url.Action("PassIntFromView", "ControllerName")',
data: data,
type: "POST",
dataType: 'JSON',
contentType: "application/json",
success: function(data) {
//do stuff with json result
},
error: function(passParams) {
console.log("Error is " + passParams);
}
});
Your controller:
[HttpPost]
public JsonResult PassIntFromView(int objId)
{
//DO stuff with int here
}
Js
var data = { "objId": 1};
$.ajax({
url: "ControllerName/PassIntFromView",
data: data,
type: "POST",
dataType: 'JSON',
success: function(data.result!=null) {
console.log(data.result);
},
error: function(passParams) {
console.log("Error is " + passParams);
}
});
I got it working like this
let numberFour = JSON.stringify(4);
$.ajax({
.......
.......
data: numberFour,
type: "POST",
dataType: 'JSON',
contentType: "application/json",
......
........
});
I fairly new to Ajax post, and I wonder if someone could help me with why i keep getting the error message.
VideoController
[HttpPost]
public ActionResult Check(string userid, string streamid)
{
return Json(new { success = true });
}
The reason why the httppost is fairly empty yet is just to test if it works before i start writing the code.
Jquery
var userID = '#User.Identity.GetUserId()';
var defaultContext = window.location.hash === "" ? XSockets.Utils.guid() : window.location.hash.substr(1);
//alert(defaultContext);
$.ajax({
url: '/video/check',
type: 'POST',
dataType: 'json',
data: JSON.stringify({
userid: userID,
streamid: defaultContext
}),
contentType: 'application/json; charset=utf-8',
success: function (data) {
alert(data.success);
},
error: function (error) {
alert(error.status);
}
});
I keep getting throw into my error: function and if I debug I never hit the [httpPost] Method
Can someone help
Update
I get a 404 in the alert.
RouteConfig
public class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
}
Try not to hardcore the URL:
var tURL = '#Url.Action("Check", "Video")';
$.ajax({
url: tURL ,
type: 'POST',
dataType: 'json',
data: JSON.stringify({
userid: userID,
streamid: defaultContext
}),
contentType: 'application/json; charset=utf-8',
success: function (data) {
alert(data.success);
},
error: function () {
alert("error");
}
});
Server:
[HttpPost]
public JsonResult Foo(string userid, string streamid)
{
return new JsonResult{ Data = new {success = true}};
}
Client:
$.post('/home/foo',{userid:'123', streamid:'bar'}, function(r) {
console.log(r);
});
EDIT - If you prefer the $.ajax way instead of $.post:
$.ajax({
url: '/home/foo',
type: 'POST',
dataType: 'json',
data: JSON.stringify({
userid: '123',
streamid: 'bar'
}),
contentType: 'application/json; charset=utf-8',
success: function (data) {
alert(data.success);
},
error: function () {
alert("error");
}
});
The confusing thing is that you mix XSockets.NET with AJAX... When you have XSockets in there, why pass anything over HTTP with AJAX? You can just as easy pass it to XSockets and call your service layer from there. Just a friendly pointer.
I am really new to Javascript, Ajax and JSON. I have the following code:
$(document).ready(setInterval(function () {
$.ajax({
cache: false,
type: "GET",
url: '#Url.Action("GetBase64Image","Home")',
contentType: 'application/json',
datatype: "json",
success: function(data)
{
alert(data.imagefilename);
displayImage(data);
}
})
},5000));
[HttpGet]
public ActionResult GetBase64Image()
{
if (ImageIndex==ImageData.Length) ImageIndex=0;
string fname = Path.GetFileName(ImageFileNames[ImageIndex]);
return Json(new { base64image = ImageData[ImageIndex++], imagefilename=fname }
, JsonRequestBehavior.AllowGet);
}
}
I do see the GetBase64Image is being called every 5 seconds but the alert only displays the value from first call to the method. What am I doing wrong.
Thanks.
public JsonResult GetPrice(List<int> modelValues)
{
List<int> model = new List<int>();
try
{foreach(var d in modelValues)
model.Add(d);
}
return Json(model, JsonRequestBehavior.AllowGet);
}
function GetDetail() {
var jsonUrl = Home/GetPrice";
$.ajax({
cache: false,
url: jsonUrl,
type: "POST",
data: "{}",
contentType: "application/json",
dataType: 'json',
async: true,
success: function (data) {
},
error: function (x, t, m) {
}
});
I want my values present in model to display in label.It should be done by binding data using ajax call. Can someone please suggest me a solution? Label id="name" in html file.