The query string I use is always empty. I have no idea why, and have tried for hours with
The HttpContext.Request returns all other parts of the URL except the querystring.
With this url https://localhost:44394/Trackers/Create?Place=Vision_College
and this Model
[BindProperties(SupportsGet = true)]
public partial class Tracker
{
[FromQuery(Name = "Place")] //populates it from the query
public string Place { get; set; }
...}
and this controller
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("Name, Phone, Place")] Tracker tracker)
{
OK I found an answer.
I was trying to use it in the POST of the CREATE, when I should have been using it in the GET part of CREATE
Thanks for everyones help!
Since you are using the query parameters in httpPost you should use, [FromQuery] inside your arguments. Follow this
Your DTO class would be,
public class Tracker
{
[FromQuery(Name = "Place")]
public string Place{ get; set; }
}
In your controller class
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([FromQuery]Tracker tracker)
{
}
Note: If your query parameters match with the model property names, specifically annotating the properties would not be necessary.
Better you can get by body itself since this is a post request. otherwise make this as a get request. If converting to get by body, simply use [FromBody] in endpoint arguments instead of [FromQquery]
I am working on single page application using HotTowel. I have referred below link for invoking POST method using breeze.
http://www.breezejs.com/breeze-labs/breezeajaxpostjs
Below is my code.
On Server side:
public struct Customer {
public string CompanyName{ get; set; }
public string Phone { get; set; }
}
[HttpPost]
public IQueryable<Customer> SimilarCustomersPOST(Customer customer)
{
return repository.CustomersLikeThis(customer);
}
Invoking POST method using breeze.
var query = breeze.EntityQuery.from('SimilarCustomersPOST')
.withParameters({
$method: 'POST',
$encoding: 'JSON',
$data: { CompanyName: 'Hilo' , Phone: '808-234-5678' }
});
I am getting below error:
Error: The requested resource does not support http method 'GET'.
When I am writing a server code like below:
[System.Web.Http.AcceptVerbs("GET", "POST")]
[HttpPost]
public IQueryable<Customer> SimilarCustomersPOST(Customer customer)
{
return repository.CustomersLikeThis(customer);
}
It is invoking but accepted parameters getting null values.
Please let me know what is the reason I am getting this error.
Thanks in advance.
I'm not sure what happens when you mix [HttpPost] with [AcceptVerbs("GET")], but that might be the problem.
Note that in a GET method you need to use the [FromUri] attribute in front of parameters that are not simple value types, but you don't need that in a POST method. This blog post explains WebAPI parameter binding nicely.
I'm new to asp.net mvc. Basically i'm from php programmer. In my php file i can display what are all the values coming from html page or form using echo $_POST; or print_r($_POST); or var_dump($_POST). But in asp.net how can i achieve this to check what are all the values are coming from UI Page to controller.
You may take a look at the Request.Form property:
public ActionResult SomeAction()
{
var values = Request.Form;
...
}
You could put a breakpoint and analyze the values. Or simply use a javascript development toolbar in your browser (such as FireBug or Chrome Developer Toolbar) to see exactly what gets sent to the server.
But normally you are not supposed to directly access the raw values. In ASP.NET MVC there's a model binder which could instantiate some model based on the values sent to the server.
For example you could have the following model:
public class MyViewModel
{
public int Age { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}
and then have your controller action take this model as parameter:
public ActionResult SomeAction(MyViewModel model)
{
... you could use the model properties here
}
and now you could invoke this controller action either wityh a GET request passing the parameters in the query string (/someaction?age=10&firstname=foo&lastname=bar) or using a POST and sending them in the body.
You can check the raw data via Request.Form.
But this is not he spirit of the ASP.NET MVC. It is preferd that you expect a model into your controller. You have all type safety mapping already done by special module called model binder.
So unless you work on some special case, you just add a model to the controller action:
public ActionResult SomeAction(SomeModel model)
{
//Handle SomeModel data further ...
}
You can create an action which will accept the parameters from the UI page like the following:
[HttpPost]
public ActionResult SomeAction(string param1, int param2)
{
//Now you can access the values here
}
or make an action which will accept the model
public ActionResult SomeAction(SomeModel model)
{
//Access the model here
}
Currently using MVC3 and using jQuery $.post function to send the ajax request to the controller action called "SearchInitiated". I'm having a little bit of a head-scratcher here because I'm not sure exactly where my issues lies. I'm sure its something minor that I have overlooked.
When I call my Controller method from an AJAX call, I am passing a json object (stringified) to a controller action. See below:
Request Headers from Chrome
Accept:/ Content-Type:application/x-www-form-urlencoded;
charset=UTF-8 User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64)
AppleWebKit/537.17 (KHTML, like Gecko)
Chrome/24.0.1312.52 Safari/537.17
X-Requested-With:XMLHttpRequest
Form Dataview
connectorId:1
sessionId:97e2d8b2-be9e-4138-91ed-42ef9c6a2cd6
party:
{"Tag":null,"PartyIdentifier":"1","Address":null,"Address2":null,"BusinessName":"","CellPhoneNumber":null,"CIF":"","City":null,"Country":null,"DateOfBirth":null,"EMailAddress":null,"EmploymentTitle":null,"EmployerAddress":null,"EmployerAddress2":null,"EmployerCity":null,"EmployerName":null,"EmployerPhoneNumber":null,"EmployerState":null,"EmployerZip":null,"Fax":null,"Firstname":"TEST","Lastname":"USER","MailingAddress":null,"MailingAddress2":null,"MailingCity":null,"MailingState":null,"MailingZip":null,"Middlename":null,"PhoneNumber":null,"State":null,"TIN":"1111111","WorkPhoneNumber":null,"Zip":null}
javascript
var parties = #(Html.Raw(Json.Encode(Model.SearchParties)));
function SearchForCustomer(id)
{
var currentSelectedParty = GetPartyById(id)
//SearchPost is a wrapper for $.ajax using default values for dataType and contentType
SearchPost(URL, {
'connectorId': '#Model.ConnectorId',
'sessionId': '#Model.SessionId',
'party' : JSON.stringify( currentSelectedParty )
}
}
Controller
public ActionResult SearchInitiated(int connectorId, string sessionId, SearchParty party)
{
code here....
}
public class SearchParty
{
public SearchParty();
public SearchParty(string lastname, string firstname);
public string Address
{
get;
set;
}
public string City
{
get;
set;
}
public string Country
{
get;
set;
}
public string DateOfBirth
{
get;
set;
}
.... etc etc
}
However, the party object is null.
If I change the code to the following, everything deserializes correctly into the strongly typed object.
public ActionResult SearchInitiated(int connectorId, string sessionId, string party)
{
JavaScriptSerializer json_serializer = new JavaScriptSerializer();
SearchParty sp =
json_serializer.Deserialize<SearchParty>(party);
}
I know my json string is valid since it is working in the second code snippet and the value is being passed in the call. What else could I be missing?
Try this.
public class SearchParty
{
public string party { get; set; }
}
[HttpPost]
public ActionResult SearchInitiated(SearchParty party)
{
....
return View();
}
probably you need to set the traditional prop of jQuery.ajax to true in order to achieve traditional style of param serialization
put the below line of code immediatly after the document ready like
$(function(){
jQuery.ajaxSettings.traditional = true;
});
This SO question may help you further
I would make sure you have the [Serializable] attribute on your model. Also, make sure your request specifies party={myjson} .
You just need to declare a class 'SearchParty' in the controller to retrieve the strongly typed object in the controller without serializing.
public class SearchParty
{
public string party { get; set; }
}
public ActionResult SearchInitiated(SearchParty party)
{
code here....
}
Please check this link too
I resolved my error by modifying the javascript ajax call to this:
SearchPost(URL, JSON.stringify( {
'connectorId': '#Model.ConnectorId',
'sessionId': '#Model.SessionId',
'party' : currentSelectedParty
}))
I needed to stringify the entire data object sent in the ajax call, not just the 'party' object
I had
[HttpPost]
public ActionResult Foo()
{
// read HTTP payload
var reqMemStream = new MemoryStream(HttpContext.Request.BinaryRead(HttpContext.Request.ContentLength));
....
}
The payload is application/json; worked fine; then I changed to
public ActionResult Foo(string thing)
{
....
}
The intention being to post to MyController/Foo?thing=yo
Now I cant read the payload(the length is correct but the stream is empty). My guess is that the controller plumbing has eaten the payload looking for form post data that can be mapped to the method parameters. Is there some way that I can stop this behavior (surely MVC should not have eaten a payload whose type is marked as JSON , it should only look at form post data). My work around is to add 'thing' to the json but I dont really like that
Try resetting the input stream position before reading:
public ActionResult Foo(string thing)
{
Request.InputStream.Position = 0;
var reqMemStream = new MemoryStream(HttpContext.Request.BinaryRead(HttpContext.Request.ContentLength));
....
}
Now this being said, if you are sending an application/json payload why on the holy Earth are you bothering to read directly the request stream instead of simply defining and using a view model:
public class MyViewModel
{
public string Thing { get; set; }
public string Foo { get; set; }
public string Bar { get; set; }
...
}
and then:
public ActionResult Foo(MyViewModel model)
{
// use the model here
....
}
ASP.NET MVC 3 has a built-in JsonValueProviderFactory which allows you to automatically bind JSON requests to models. And if you are using an older version it is trivially easy to add such factory your self as Phil Haack illustrates in his blog post.