There is an Api method called via Ajax. After parsing and other necessary things has been finished, I get the following result.
["IG4","E1 ","E16"]
As soon as the results received, it calls another MVC ActionResult to display data from the database, where the postcode attribute of the object contains one of these Json results. However it does not work.
public ActionResult SearchResult(JsonResult postcode)
{
var posts = db.Posts.Where(p => p.PostCode.Contains(postcode));
return PartialView("postlist", posts);
}
When the ActionResult is called via Ajax, I checked what url is being called and got the following result
SearchResult?postcode%5B%5D=IG4&postcode%5B%5D=E1+&postcode%5B%5D=E16
$('#searchBtn').on('click', function () {
var _postcode = $('#searchPostcode').val();
var _distance = $('#searchDistance').val();
alert("postcode " + _postcode + " distance " + _distance);
var _url = '#Url.Action("GetPostcodesWithin", "Api/PostcodeApi")'; // don't hard code url's
$.ajax({
type: "GET",
url: _url,
data: { postcode: _postcode, distance: _distance },
success: function(data) {
alert("search ok");
$.ajax({
type: "GET",
url: '#Url.Action("SearchResult", "Posts")',
data: { postcode: data },
success: function (data) {
alert("Post results called");
$("#postList").html(data).show();
},
error: function (reponse) {
alert("error : " + reponse);
}
});
},
error: function (reponse) {
alert("error : " + reponse);
}
});
});
Json data returned from GetPostcodesWithin method is displayed on the top, which is passed onto SearchResult
You first need to change the method to
public ActionResult SearchResult(IEnumerable<string> postcode)
Then change the 2nd ajax call to
$.ajax({
type: "GET",
url: '#Url.Action("SearchResult", "Posts")',
data: { postcode: data },
traditional: true, // add this
success: function (data) {
....
}
})
The parameter postcode in the SearchResult() method will then contain the 3 string values from your array.
Because you now have a collection of strings, your query now needs to be
var posts = db.Posts.Where(p => postcode.Contains(p.PostCode));
Side note: Your second value contains a space ("EF ") which may need to be trimmed?
Related
I have this ajax post method in my code that returns undefined. I think its because I have not passed in any data, any help will be appreciated.
I have tried passing the url string using the #Url.Action Helper and passing data in as a parameter in the success parameter in the ajax method.
//jquery ajax post method
function SaveEvent(data) {
$.ajax({
type: "POST",
url: '#Url.Action("Bookings/SaveBooking")',
data: data,
success: function (data) {
if (data.status) {
//Refresh the calender
FetchEventAndRenderCalendar();
$('#myModalSave').modal('hide');
}
},
error: function (error) {
alert('Failed' + error.val );
}
})
}
//controller action
[HttpPost]
public JsonResult SaveBooking(Booking b)
{
var status = false;
using (ApplicationDbContext db = new ApplicationDbContext())
{
if (b.ID > 0)
{
//update the event
var v = db.Bookings.Where(a => a.ID == a.ID);
if (v != null)
{
v.SingleOrDefault().Subject = b.Subject;
v.SingleOrDefault().StartDate = b.StartDate;
v.SingleOrDefault().EndDate = b.EndDate;
v.SingleOrDefault().Description = b.Description;
v.SingleOrDefault().IsFullDay = b.IsFullDay;
v.SingleOrDefault().ThemeColor = b.ThemeColor;
}
else
{
db.Bookings.Add(b);
}
db.SaveChanges();
status = true;
}
}
return new JsonResult { Data = new { status } };
}
Before the ajax call, you should collect the data in object like,
var requestData= {
ModelField1: 'pass the value here',
ModelField2: 'pass the value here')
};
Please note, I have only added two fields but as per your class declaration, you can include all your fields.
it should be like :
function SaveEvent(data) {
$.ajax({
type: "POST",
url: '#Url.Action(Bookings,SaveBooking)',
data: JSON.stringify(requestData),
dataType: 'json',
contentType: 'application/json; charset=utf-8',
success: function (data) {
if (data.status) {
//Refresh the calender
FetchEventAndRenderCalendar();
$('#myModalSave').modal('hide');
}
},
error: function (error) {
alert('Failed' + error.val );
}
})
}
Try adding contentType:'Application/json', to your ajax and simply have:
return Json(status);
In your controller instead of JsonResult. As well as this, You will need to pass the data in the ajax code as a stringified Json such as:
data:JSON.stringify(data),
Also, is there nay reason in particular why it's a JsonResult method?
We are trying to make a Ajax request to our Core Web API and get the data Json result back to the Controller for further processing, Which include Deserialization of the Json object result, Ajax request is working fine and we are able to get the required Json data in data.
Can anyone here please advise the changes or the alternatives to achieve this?
View (Ajax Request)
#section scripts
{
<script type="text/javascript">
$(document).ready(function () {
GetEventDetails('#Url.Content("~/")');
});
function GetEventDetails(contextRoot) {
$.ajax({
type: "GET",
url: contextRoot + "api/EventsAPI",
dataType: "json",
success: function (data) {
debugger;
var datavalue = data;
contentType: "application/json";
//Send data to controller ???
console.log(data);
},
error: function (xhr) {
alert(xhr.responseText);
}
});
}
</script>
}
Controller.cs
public ActionResult Index()
{
/*Do all stuff before returning view
1. Get Json Data from Ajax request
2. Deserialize the obtained Json Data
3. return to view
*/
return View("Index");
}
Update:
I have tried the solution given by #J. Doe, but still unable to get the result set. Please check the screenshot and below code..
Ajax Request:
function GetEventDetails(contextRoot) {
$.ajax({
type: "GET",
url: contextRoot + "api/EventsAPI",
dataType: "json",
success: function (data) {
debugger;
var datavalue = data;
contentType: "application/json; charset=utf-8";
console.log(data);
var EventJson = data;
console.log(EventJson);
$.ajax({
type: "POST",
url: "#Url.Action("Index")",
dataType: "json",
data: EventJson,
contentType: "application/json; charset=utf-8",
//data: EventJson,
success: function (data) {
alert(data.responseText);
console.log('Data received: ');
console.log(data.responseText);
},
failure: function (errMsg) {
console.log(errMsg);
}
});
},
error: function (xhr) {
alert(xhr.responseText);
}
});
}
Class Properties:
public class RootObject
{
public Embedded _embedded { get; set; }
public Links _links { get; set; }
public Page page { get; set; }
}
Here is Action Result Controller:
public ActionResult Index(RootObject model)
{
if (model != null)
{
return Json("Success");
}
else
{
return Json("An Error Has occoured");
}
//return View("Index");
}
Error Snapshot:
enter image description here
1) Add [FromBody] the controller you are returning to. This will make the controller expect a JSON object.
[HttpPost]
public ActionResult Index([FromBody]RootObject model)
{
if (model != null)
{
return Json("Success");
}
else
{
return Json("An Error Has occoured");
}
//return View("Index");
}
2) If this doesn't work you are not posting a correct json object/you are not posting a json object use console.dir(EventJson); to inspect the object you are passing in the console of the browser.
3) How to create a JSON object in JS: https://www.w3schools.com/js/js_json_stringify.asp
We are trying
Hello soviet sojuz!
But back to question - A 2 months ago i created sample on GitHub with ajax with .Net Core - https://github.com/CShepartd/ASP.Net_Core_-_Ajax_Example
In short:
Make action with objects in controller:
public IActionResult Ajax(string name1, string name2)
{
return View();
}
Next in view send name1 and name2 to action
$('form').submit(function(event) {
event.preventDefault();
var data = {
name1: $("input[name='name1']", this).val(),
name2: $("input[name='name2']",this).val()
};
$.ajax({
type: 'POST',
url: '/Home/Ajax',
dataType: 'json',
data: data,
success: function(response) {
alert(response);
console.log('Data received: ');
console.log(response);
},
failure: function(response) {
//...
},
error: function(response) {
//...
}
});
});
I wrote two Ajax calls that request data from stored procedures (in SQL Server), sp_ahtreatmentselect and sp_inventoryselect. Here is how the functions look like in the Breeze controller.
[HttpPost]
[ActionName("getinventories")]
public object GetInventories(HttpRequestMessage request)
{
var data = request.Content.ReadAsFormDataAsync().Result;
var opId = data["operationid"];
string query = "sp_inventoryselect #operationId";
SqlParameter operationId = new SqlParameter("#operationId", opId);
return UnitOfWork.Context().ExecuteStoreQuery<GetInventories>(query, operationId);
}
[HttpPost]
[ActionName("gettreatments")]
public object GetTreatments(HttpRequestMessage request)
{
var data = request.Content.ReadAsFormDataAsync().Result;
var opId = data["operationid"];
string query = "sp_ahtreatmentselect #operationId";
SqlParameter operationId = new SqlParameter("#operationId", opId);
return UnitOfWork.Context().ExecuteStoreQuery<GetTreatments>(query, operationId);
}
Now, on client-side, the Ajax calls look like this:
var ajaxImpl = breeze.config.getAdapterInstance('ajax');
function treatments(id) {
return ajaxImpl.ajax({
type: 'POST',
url: serviceName + '/gettreatments',
data: { operationid: id },
success: function(data) {
console.log('Success!');
},
error: function(error) {
console.log('Error!');
}
});
}
function inventories(id) {
return ajaxImpl.ajax({
type: 'POST',
url: serviceName + '/getinventories',
data: { operationid: id },
success: function (data) {
console.log('Success!');
},
error: function(error) {
console.log('Error!');
}
});
}
return inventories(id).then(treatments(id))
.then(function() {
// Do something
})
.fail(function(error) {
// Display error
});
Both Ajax calls work fine, BUT problem is, // Do something is run BEFORE inventories(id) and treatments(id) are run. I would like it to work the other way around instead. I also tried $.when(inventories(id), treatments(id)).then(...) and $.when(ajaxImpl.ajax(...), ajaxImpl.ajax(...)).then(...), but same problem occurs. How do I solve this?
Thanks in advance.
I realized that the issue lay on synchronous calls, not Breeze. I used queue.js to make Ajax calls and // Do something and the calls are completed. Here is how.
var ajaxImpl = breeze.config.getAdapterInstance('ajax'),
serviceName = 'some/service',
id = 1; // Could be any number
return queue()
.defer(function(callback) {
ajaxImpl.ajax({
type: 'POST',
url: serviceName + '/getinventories',
data: { operationid: id },
success: function (data) {
console.log('Success!');
callback(null, data);
});
})
.defer(function(callback) {
ajaxImpl.ajax({
type: 'POST',
url: serviceName + '/gettreatments',
data: { operationid: id },
success: function (data) {
console.log('Success!');
callback(null, data);
});
})
.awaitAll(function(error, results) {
if (error) {
console.log('Error! ' + error);
} else {
// Do something, given that:
// results[0] are inventories, and
// results[1] are treatments
}
});
I don't know what this has to do with Breeze. Did you get your ajaxImpl from a Breeze ajax adapter? I've looked at both ajax adapters shipped with Breeze and neither of them returns anything from a call to the ajax method!
Accordingly, you're expression should have died immediately with a reference error when it got to the .then in return inventories(id).then(.... I don't see how it could have gotten to \\ do something at all.
Something isn't right with the way you've posed this question.
Once you get beyond this I still don't see how this involves Breeze. Breeze won't do anything with the results of your service requests.
I'm completely flummoxed by your question.
I am sending a json object to controller via ajax call, data property of ajax call showing correct data. On post to controller's method -received parameter having collection and its count is showing perfectly but the properties inside the collection is not showing values.
Here is the code -
Controller-
[HttpPost]
public ActionResult ImageOperations(ImageProcessingModel imageProcessingModel)
{
return Json("sucess");
}
Model-
public class ImageProcessingModel
{
public string Source { get; set; }
private List<ThumbnailImageSubTaskModel> _thumbnailImageSubTaskModel;
public List<ThumbnailImageSubTaskModel> ThumbnailImageSubTaskModel
{
get
{
if (_thumbnailImageSubTaskModel == null)
{
_thumbnailImageSubTaskModel = new List<ThumbnailImageSubTaskModel>();
}
return _thumbnailImageSubTaskModel;
}
}
}
js-
var ImageProcessingModel =
{
"Source": "test",
"ThumbnailImageSubTaskModel":allThumbnails.allItems()
}
allThumnails.allItems is ko.observableArray() which having values.
$.ajax({
url: '/ImageProcessingTask/ImageOperations',
type: 'Post',
data: ImageProcessingModel,
success: function (data, status) {
processEscapeKeyPress = true;
var fn = window[successCallback];
fn(data, passDataToCallback);
},
error: function (xhr, desc, err) {
alert(err);
processEscapeKeyPress = true;
processAjaxError(xhr, desc, err);
},
});
here ImageProcessingModel having all values and source is simple a string so this value is coming in the controller only the ThumbnailImageSubTaskModel showing counts but not its value.
Thanks!!
A common problem encoutered with sending JSON through AJAX to MVC. Many forget to set the type of data in their AJAX request.
Try setting the datatype and contentType:
$.ajax({
url: '/ImageProcessingTask/ImageOperations',
type: 'Post',
**contentType: 'application/json; charset=UTF-8',
dataType: 'json',**
data: ImageProcessingModel,
success: function (data, status) {
processEscapeKeyPress = true;
var fn = window[successCallback];
fn(data, passDataToCallback);
},
error: function (xhr, desc, err) {
alert(err);
processEscapeKeyPress = true;
processAjaxError(xhr, desc, err);
},
});
I am populating an array with an [int,bool]:
$.each(ownedChecked, function (key, val) {
/*code to set id as int and paintedTrue as bool*/
ownedIDs.push([id,paintedTrue]);
});
I create a var that will be stringified:
var saveData = { OwnedListEntryIDs:ownedIDs };
//send data
$.ajax({
url: '/ListEntry/OwnedModels',
type: 'POST',
contentType: 'application/json; charset=utf-8',
data: JSON.stringify(saveData),
success: function (data) { alert('Update success: ' + data); },
failure: function (data) { alert('Update failed: ' + data); }
});
Here is the ViewModel:
public class OwnedPaintedSave
{
//collection contains a ListEntryID and a bool indicating whether it is painted or not
public Dictionary<int,bool> OwnedListEntryIDs { get; set; }
}
Once in the controller method, ModelState.Isvalid passes and code gets to the foreach loop, but models is always NULL:
[HttpPost]
public JsonResult OwnedModels(OwnedPaintedSave models)
{
if (ModelState.IsValid)
{
foreach (var id in models.OwnedListEntryIDs)
{ }
}
}
I tried setting traditional:true in the $.ajax method, but same issue. I'm guessing the Dictionary in the ViewModel is not what I need to bind to, but I'm not sure what it should be. Thanks for any help.
I gave the OwnedPaintedSave object two int[] properties, one for OwnedIDs and one for PaintedIDs.
I think the problem lies in your controller. You are passing var saveData = { OwnedListEntryIDs:ownedIDs }; (essentially a Dictionary<int, bool> - yes?) as your data but the parameter in the action result is of type OwnedPaintedSave
I think if you change your controller parameter to Dictionary<int, bool> ownedListEntryIDs and don't stringify the javascript object, the framework is clever enough to serialize and deserialize your object. So you would have this...
var saveData = { OwnedListEntryIDs:ownedIDs };
//send data
$.ajax({
url: '/ListEntry/OwnedModels',
type: 'POST',
contentType: 'application/json; charset=utf-8',
data: saveData,
success: function (data) { alert('Update success: ' + data); },
failure: function (data) { alert('Update failed: ' + data); }
});
And then this in your controller...
[HttpPost]
public JsonResult OwnedModels(Dictionary<int, bool> ownedListEntryIDs)
{
if (ModelState.IsValid)
{
foreach (var id in ownedListEntryIDs)
{ }
}
}